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Your Trusted Optical Glass Supplier in China

Focus on Optical Glass Processing Since 2009

0.4mm – 4 mm Thickness

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Custom Optical Glass as per Your Request, 0.4mm - 4mm Thickness

SXET is one of China’s famous and most successful optical glass manufacturers. Moreover, SXET is capable of designing, engineering, and manufacturing optical glass to your requirements.

SXET’s Optical glass is considered exceptional and mainly manufactured through a continuous melting process. Optical glass got its uniqueness from the melting process, chemical composition, and finishing methods. SXET’s Optical glass can be flint or crown, and the difference between them is the index of reflection.

Optical glass

Optical glasses are widely used in a lot of industries, SEXT is focusing on optical glass manufacturing, we can do customized optical glass for you.

Optical glass sheet

SXET is a professional optical glass sheet manufacturer, we are focus on optical glass fabricating with over 10 years of experience.

Optical glass lens

SXET  is a professional optical glass lens manufacturers,  we can manufacture optical glass lens with a wide range of glass materials such as Gorilla glass, Schott glass, Sapphire glass, AGC glass, Float glass, etc.

Custom optical glass

With over 10 years of experience, SXET can do custom optical glass as per your needs such as a wide variety of shapes, color printing, spectral range, etc.

Optical glass cut to size

SXET is an expert optical glass supplier, with a wide variety of precision machines, we can cut optical glass to any size according to your request.

Optical glass

Optical glass is a wide range used in industries, SXET has been in optical glass manufacturing for over 10 years, we can fabricate optical glass as per your needs with color printing, hole drilling, AF coating, etc.

Optical Glass One-stop Solution, Optical Glass Processing as per Your Drawing

Optical glass’s value is increasing, and its quality and integrity are fundamental. SXET’s Optical glass is a precision/technical glass because of all the complexity and precision involved in its manufacturing process. In general, optical glass is naturally water-resistant.

SXET’s Optical glass is known for its refractive index, Abbe number, and other optical properties. It also has extremely high material purity. Optical glass enables you to have precision optics with increased optical requirements.

Optical glass’s unique thing is that it prevents staining in a humidity of 80% to 90% at 50-60°C. Moreover, optical glass also provides great resistance against alkalis and other environmental factors. Abbe number gives optical glass higher/lower color dispersion.

The density of optical glass determines the weight of optical assembly along with the lens diameter and useful for sensitive applications. SXET’s Optical glass is perfect for applications that involve extreme temperatures and rapid heat changes because of its greater coefficient of expansion.

Optical glass is considered the most common glass type utilized in optical applications. The optical glass can be used as precision lenses, pressure sensors, windows, laser systems, and beam displacement.

At SXET, we know that the manufacturing of optical glass requires extreme precision focus and involves complexity. A slight imperfection can ruin the whole optical glass and decrease its overall quality and performance. SXET understand these challenges and surpass them with the help of qualified staff and fully optimized standard, and technologically enhanced optical glass manufacturing.

SXET is the most trusted optical glass manufacturer and can understand how important it is to maintain an appropriate temperature to have a perfect optical glass. SXET also offers full customization over its optical glass. Furthermore, SXET is fully capable of manufacturing the right size and type of optical glass based on your exact requirements.

SXET has 15+ years of glass manufacturing experience and expert in providing optical glass that will fit your applications perfectly and exactly based on your requirements. At SXET, we value our commitment and ensure the best value and rapid delivery of precision machined optical glass. SXET make sure its consistent quality custom optical glass with competitive pricing and rapid manufacturing suits you perfectly.

SXET maintains the quality and performance of its optical glass.  Achieving precision tolerance from micro to macro scale is not the most challenging part for SXET, and we can process your every optical glass-related requirement.

Moreover, SXET is also a reliable supplier of Curved Glass, Custom Cut Glass, Glass Table Tops, Mirror & Glass Cut to Size, Toughened Glass, and many more. Please peruse our website to understand and learn more about optical glass manufacturing and how SXET offers the best-related services.

Contact SXET and let our skilled staff meet all your optical glass needs today!

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Optical Glass – The Ultimate FAQ Article


At SXET, we believe that the key to manufacturing optical glass is to control its properties, chemical composition, and focus on its index of refraction.

This FAQ guide will enable you to completely understand optical glass and how SXET manufactures it with utmost precision and care.

Moreover, you will also learn what custom options you have for your optical glass.

And in what sizes, shapes, and thicknesses you can have your custom optical glass.

What is Optical Glass?

Optical glass is known to be extremely pure, and its ability to transmit light.

Optical glass can transmit light perfectly within certain wavelengths.

Optical glass can be flint or crown completely based on its index of refraction.

Moreover, optical glass contains a vast library of additives and is commonly used in optical applications such as precision lenses and pressure sensors.

Optical glass manufacturing contains complexity and requires precision.

Optical glass manufacturing is sensitive, and at SXET, we do it with utmost care and precision.

The quality and performance of optical glass can be measure through its purity and its chemical, mechanical, and optical properties.

Optical glass can be visible, invisible, and can absorb, transmit, or reflect light.


Figure 1 – The Perfectly Shaped Optical Glass

How is Optical Glass Made?

At SXET, manufacturing of optical glass majorly consists of the four main steps.

  1. The first step:

In this step, optical glass material selection is performed. SXET offers many optical glass types, including:

  • Quartz Glass
  • Gorilla Glass
  • Schott Glass

Moreover, SXET uses a vast library of glass types for its optical glass and offers complete customization.

Moreover, SXET’s advanced optical glass manufacturing technologies enable us to process many other types of glass.

In case you want any other type for your optical glass, just let us know.

  1. The Second Step:

This step includes the selection of coating and other surface finishes for optical glass. SXET offers many coatings, including:

  • UV-protective
  • Anti-reflective
  • Anti-scratch

SXET also offers custom coatings or surface finishes for optical glass to achieve a specific look or feature.

  • The Third Step:

The third step is the manufacturing of optical glass based on the options you chose.

Our experienced staff with technologically enhanced machines process the glass, heat it, shape it, and perform post-processes if required.

Because this way, we can maintain high optical glass quality and performance.


Figure 2 – The Stabilization of Optical Glass During the Manufacturing Process

  1. The fourth step:

This step is the final one and includes the visual inspection of manufactured optical glass.

At SXET, our high level and skilled staff perform the inspection to detect any kind of uniformity in optical glass.

In the end, your finalized optical glass order is packed and ready for shipment.


Figure 2 – Inspection to Confirm the High-Quality and Performance of Optical Glass

How to Measure Optical Glass?

The measurement of optical glass’s internal structure is more important, and it requires knowledge about its index of refraction, light transmission, and dispersion.

This way, you can also measure the internal stress of optical glass.

Light protection, heat transmission, and visual color of optical glass also can be measured through its characteristics.

Hence, understanding the optical glass characteristics is crucial for you to measure the optical glass.

Moreover, the general structure of optical glass can be measured through its thickness and shape.

What is the Physics of Optical Glass?

Optical glass is the most common and exceptional for optics applications.

Optical glass is perfect for multi-component lenses because of its complex physical and optical properties.

Optical glass is preferred in terms of light absorption, transmission, or reflection.

Optical glass outer structure and shape define its physics and illusion.


Figure 4 – A Perfectly Manufactured Optical Glass

What is the Optical Glass Cut to Size?

At SXET, we make sure that you get the exact optical glass based on what you required.

SXET offers you this freedom through its optical glass cut to size.

You can have cost-effective optical glass solutions with exceptional clarity and chemical resistance.

SXET enable you to custom cut optical glass by giving you the right to choose its:

  • Thickness
  • Color
  • Coating
  • Surface Finish
  • Glass Type
  • Edge Work
  • Drilling and Cutting
  • Size
  • Surface Resistance
  • Polishing

Moreover, SXET will process and output the custom optical glass based on your custom requirements.


Figure 5 – Optical Glass Cut to Size

What are the Types of Optical Glass?

Optical glass is known for its two unique types:

  • Flint Optical Glass
  • Crown Optical Glass

These two can be recognized through their index of refraction and Abbe number.

Moreover, both optical glasses have different Abbe numbers but typically under 60.

The flint optical glass is known for its high refractive index and can have any value of Abbe number.

On the other hand, Crown optical glass has a low refractive index and can be used for a completely separate purpose.

In addition to their conflicting properties, sometimes flint and crown optical glass is used together in curtail applications.

Both can have low or high Abbe numbers giving you different and higher colors or reduces the color aberration completely.

What are the Chemical Properties of Optical Glass?

Optical glass can be used in a vast library of devices based on its chemical properties.

Optical glass characteristics and chemical properties can define its type.

The optical glass contains additives like boric oxide and lead.

Additionally, these additives enhance the optical glass ability of light transmission within certain wavelengths.

Optical glass can be suitable for different wavelengths and can show different optical effects.

Optical glass can be visible, invisible, and can absorb, transmit, or reflect light based on its chemical properties.

Each optical glass type contains different raw materials.

The manufacturing of flint optical glass contains a high usage of lead.

And the crown optical glass manufacturing includes a high amount of potassium oxide use.

What are the Mechanical Properties of Optical Glass?

Mechanical properties play an important part in optical glass purity, hardness, and transparency.

Compared to any other glass, optical glass has more mechanical properties, including some of the rare ones.

At SXET, we manufacture optical glass to be dense with a density between 2.35 – 6.17 g/cm³.

Lead is considered a denser raw material for optical glass, and that’s the reason why flint optical glass is denser than crown optical glass.

Moreover, optical glass can have both higher or lower index of refraction based on its type.

These mechanical properties make optical glass exceptional and extremely useful.

What are the Optical Properties of Optical Glass?

There are properties that make optical glass unique, known as optical properties.

When considering these properties, engineers refer to two values:

  • Refractive Index
  • Abbe number

These are two of the most prominent optical glass properties.

Index of Refraction:

The light can travel quicker through materials with a lower refractive index and can travel slower through materials with a higher refractive index.

Because, a higher index of refraction will bend the light in more amount.

That’s the reason why flint optical glass has a higher refractive index, whereas crown optical glass has a typically lower refractive index.

Abbe Number:

Abbe number is also recognized by V-number.

Abbe number is an approximate measure of the optical glass dispersion.

A lower Abbe number can give you a higher color dispersion, and a higher value can give you a lower optical glass dispersion.

On the other hand, a higher Abbe number can possibly give little to no color aberration.

What are the Thermal Properties of Optical Glass?

Thermal properties have great value when it comes to optical glass manufacturing.

The optical glass heat treatment and the coating is based on thermal properties.

The following are some thermal properties that are important to be a part of optical glass:

  1. Strain point:It’s the maximum temperature point at which the optical glass can be used for different applications.
  2. Annealing point:It is the temperature point at which the internal stress of optical glass can be removed completely with utmost precision.
  • Softening point: It is the temperature point at which the optical glass deforms under its own weight.
  1. Transformation point:It is the temperature point at which the optical glass starts transforming into the liquid from its solid-state.
  2. Yield point:Defines the limit of optical glass elastic behavior in part or full liquid form.
  3. Thermal conductivity:It is the degree to which an optical glass conducts electricity.

Optical glass has more to offer based on your specific requirements.

What are the Applications of Optical Glass?

At SXET, we know that purity, durability, and exceptional level of clarity is what makes optical glass the most commonly used material.

Optical glass is used for a vast library of applications and is considered an essential component in numerous products.

Optical glass has a major role in our modern life and enhanced technology.

The optical glass can be used for or can be a part of the following:

  • Analytical Lenses
  • Medical Equipment Lenses
  • Optical System Windows
  • Optical Glass Substrates
  • Lead Radiation Optical Glass
  • Precision Lenses
  • Pressure Sensors
  • Laser Systems
  • Beam Splitters
  • Medical Technology
  • Biotechnology
  • Fiber Optics
  • Renewable Energy
  • Aspherical and Spherical Lenses
  • Cylindrical Lenses
  • Optical Filter Glass
  • Special Glasses for Radiation Absorption
  • Antique Glasses
  • Colored Optical Glass
  • Architectural Optical Glass

All of these are possible and extremely advanced because of optical glass use.

The purity, transparency, and avoidance of discoloration make the optical glass even more special.

What are the Features of Optical Glass?

The most common identification features of optical glass are its index of refraction and Abbe number.

Optical glass is very complex and requires precision in manufacturing.

With the right manufacturing, optical glass offers tighter tolerances only if you’re required.

It offers both manufacturers and customers the freedom to meet the values based on user requirements and needs.

Optical glass offers light absorption, transmission, and reflection with ease and also can absorb the UV rays.

Furthermore, optical glass can be a source of UV rays and, at the same time, can offer protection against it.


Figure 14 – Optical Glass of Tighter Tolerances

What is the Advancement in Optical Glass?

At SXET, we make sure that our optical glass manufacturing is up to date and enhanced.

Because, we want our optical glass to be precise and of excellent quality.

And this can be achieved through technologically-enhanced optical glass manufacturing.

Along with technological advancement, the demand for more precision and quality in optical glass is increasing rapidly.

Optical glass clarity and precision with high chemical and temperature resistances also increase as its technology continues to evolve.

That’s why SXET’s optical glass is considered ideal for advanced technological applications, including;

  • Robotics
  • Virtual Reality Displays
  • Laser Equipment
  • 3D printing

As developers, engineers, and business continue to develop new and improved technologies, the optical glass demand and quality is going to increase.


Figure 15 – The Accuracy and Precision of Optical Glass

What is the Difference Between Optical Glass and Quartz Glass?

Mostly due to their similar use and in some cases due to similar structure, there lies a confusion in the reorganization of optical glass and quartz glass.

However, quartz glass is not comparable to optical glass in terms of cost, quality, and properties.

Optical glass also has a higher light transmission than quartz glass.

Both optical glass and quartz are used for various industrial applications.

Optical glass can be different from quartz through its chemical structure and tolerance to temperature and pressure.

Optical glass is complex and requires precision, but what purity you can have in your optical glass cannot be achieved through quartz glass.

What is the Difference Between Optical Glass and Crystal-Glass?

Both optical and crystal glass are subcategories of glass.

Crystal glass is manufactured in the same manner as optical glass but with different materials.

These both can be confusing because both are pure and contain atoms, molecules, and irons in an ordered pattern.

Crystal glass is sometimes known as flint glass, and optical glass can be both flint and crown glass.

Moreover, optical glass is more durable than crystal glass and much cost-effective.

Crystal glass also feels heavier than optical glass. Optical glass also has more uses and applications compared to crystal glass.

Most importantly, you can deeply customize optical glass, but that’s not the case with crystal glass.

How is Optical Glass Different from Other Kinds of Glass?

Optical glass is known for its purity, transparency, and optical properties.

Optical glass is different because it’s extremely softer than any other glass type.

In general, lead and potassium are used as raw materials in optical glass manufacturing.

Optical glass is considered the only perfect glass for lenses and prisms.

Because of its exceptional purity and precision, optical glass is used in a vast library of complex applications.


Figure 16 – Optical Glass of Exceptional Purity

What are the Coatings for Optical Glass?

At SXET, we make sure that our optical glass is of excellent clarity and quality.

SXET provide high scratch and chemical resistance for its optical glass through coatings.

In order to make optical glass impact, resistant SXET applies lamination process on optical glass.

SXET offer high-quality coating options for its optical glass, including:

  • Anti-Reflective Coating
  • Anti-Scratch Coating
  • UV-Protective Coating
  • Anti-Fingerprint Coating
  • Conductive Coating
  • Chemically Tempered Optical Glass

These are some basic coatings and if you have any unique ones in mind, contact SXET, and we will be at your service.

What are the Edge Works for Optical Glass?

In order to enhance the attractiveness or achieve a specific look, edge works are performed on optical glass.

With a wide range of optical glass edging, including:

  • Clean-Cut
  • Flat Ground
  • Beveling
  • Beaded Beveling
  • Bullnose
  • Mitre
  • Polishing
  • Pencil Polishing
  • Freehand Polishing
  • Seam
  • Three-Sided Prism
  • G.

You can have the optical glass exactly based on what you required.

Moreover, SXET offers custom edge works through which you can have your special and one of its kind optical glass.

What are the Tints for Optical Glass?

Optical glass can be tinted to achieve a specific natural tint.

To improve the natural glass coloring of your optical glass, SXET uses different tints, including:

  • Bronze
  • Blue
  • Green
  • Gold
  • Grey
  • Rose

At SXET, we are fully capable of applying the tint of your custom color.

There are many uses for tinted optical glass, including; tinted lenses, tinted optical eyeglasses, and many more.

Optical glass tinting also useful to achieve some wavelength-specific filters.


Figure 19 – SXET Custom Tinted Optical Glass

What are the Different Shapes for Optical Glass?

The optical glass is available in different shapes; it mostly depends on its applications.

The general shapes for optical glass are the following:

  • Aviator
  • Oval
  • Rectangle
  • Round
  • Square
  • Wrap

Moreover, if the optical glass is required to be the lens, it can be of the following curve shapes:

  • Biconvex
  • Plano-Convex
  • Positive Meniscus
  • Negative Meniscus
  • Plano-Concave
  • Biconcave

However, the optical glass is fully customizable and gives you the freedom to choose your custom shape for it.


Figure 20 – The Optical Glass Curve Shapes

What are the Custom Options for Optical Glass?

Optical glass offers you the freedom of customization through its custom options.

Optical glass custom options help you increase the overall productivity and uniqueness of your custom optical glass.

The following are some of the basic custom options SXET offers:

  • Surface Finishing
  • Coatings
  • Coloring and Tints for Optical Glass
  • Edgeworks
  • The thickness of the Optical Glass
  • The Size
  • Glass Type
  • The Shape

You can have thousands of different options within these categories.

Moreover, you can have a perfect and one-of-a-kind optical glass that fits perfectly for your applications.


Figure 21 – The Custom Options for Optical Glass

How SXET is the Best Optical Glass Manufacturer from China?

At SXET, we work with many optical glass raw materials.

SXET is known for its choice of the finest optical glass material, precision optical glass manufacturing, and strong industry relationships.

With the quickest possible delivery, cost-effective solution, and fully optimized manufacturing process, SXET is serving many international clients.

Our quickly expanding optical glass manufacturing capabilities enable us to produce from micro to macro-sized optical glass.


Figure 22 -SXET Selection of Top-Quality Raw Materials for your Optical Glass

What are the Quality Standards for Optical Glass?

It’s important to follow quality standards in order to obtain an optical glass that is quality and performance vise perfect.

The following are quality standards that define the high quality of optical glass:

  • The selection of top-tier raw materials for optical glass
  • The optical glass should be free from any stress birefringence, bubbles, inclusions, inhomogeneity, and striae
  • The optical glass should be 99% pure and doesn’t contain any material imperfections
  • The perfect amount of required refractive index, Abbe number, and UV value required by you

At SXET, we believe that achieving and understanding the quality standards worth both cost and time-saving.


Figure 23 – Perfectly Manufactured Optical Glass

What is the Surface Quality of Optical Glass?

It is very important to establish standards and save time, cost, and energy in optical glass manufacturing to obtain high quality and high-performance optical glass.

The surface quality of optical glass is important to maintain because, in a vast library of its technical applications, the surface quality bar is very high.

When you required optical glass for lasers, the surface quality is all that matters.

Because, a great optical glass output and performance is only can be achieved through a surface free from any imperfections.

Optical glass surface quality can impact its overall appearance and quality.

The surface quality of optical glass is reflected by two numbers:

  1. The Scratch Number:Comparing the surface quality of optical glass to a set of standards under a controlled lightning condition
  2. The Dig Number:Define the surface quality value of optical glass

Optical glass surface quality is higher when its dig number is lower.

The applications require precision and perfect optical glass surface aim for 10-5 surface quality dig number.


Figure 24 – The Surface Quality of Optical Glass


What is the Surface Flatness of Optical Glass?

The surface flatness of optical glass is important to maintain for some plano-lens.

Surface flatness is mostly measured in waves, and its precision and purity from any imperfections are valued the most.

The optical flat is used to compare the surface flatness of your optical glass to determine its high precision and flatness.


Figure 25 – Optical Glass with Fully Maintained Surface Flatness

What is the Power of Optical Glass?

The power of optical glass is its ability to focus light.

High optical glass power refers to greater refraction, and low optical glass power refers to less refraction.

The power of optical glass is defined by its curved or flat surface.

An optical glass can have a curved optical surface and be tested against the flatness of another standard surface.

The air gaps are created by the interference of both curved and flat optical glass surfaces.

These air gaps also create series of rings onto the optical glass surface that used to measure its power.

What is the Irregularity of Optical Glass?

The deviation of your optical glass surface and shape against a standard optical glass model defines the irregularity of your optical glass.

The optical glass irregularity is a quality test that is conducted to measure its quality and performance.

Minimizing the optical glass irregularity means increasing its overall quality and power.

What is the Surface Finishing of Optical Glass?

During optical glass manufacturing, there are slight chances of occurring small irregularities on its surface.

Surface finishing is applied during the optical glass polishing process to purity its surface.

Sometimes, surface finishing is applied to obtain a special surface for your optical glass.

The importance of surface finishing depends on the optical glass application.

Surface finishing is mostly performed for optical glass applications that require the highest surface accuracy and precision.

What is the Thermal Conductivity of Optical Glass?

Thermal conductivity is the heat conduction of optical glass.

It means the ability of optical glass to transfer thermal energy or heat via conduction in certain conditions.

It is commonly measured for applications that required more detailed knowledge and precision in its custom optical glass.

Transfer heat or radiative energy through a given optical glass thickness reflects its ability to perform under the given circumstances.

What is the UV Transmission of Optical Glass?

Ultraviolet (UV) transmission is considered an exceptional property of optical glass.

Optical glass with greater UV transmission is popular for applications that kill microorganisms by exposure to specific wavelengths.

Optical glass is known for its excellent transmission of UV wavelengths.

Moreover, its performance doesn’t degrade with exposure to UV light.

Optical glass also has good chemical resistance and good physical properties.

How Your Optical Glass is Cost-Effective?

At SXET, we believe that cost and quality play an important part in optical glass manufacturing.

Managing costs and utmost optical glass quality with the selection of exceptional quality raw materials and machinery is complex.

But SXET makes sure you get extremely cost-effective and best in quality optical glass solutions.

Our minimum waste of raw material, optimized processes, and rapid manufacturing save time and cost.

SXET also eliminates the waste of resources by reducing the defects of optical glass.

Moreover, better optical glass specifications precision and longer manufacturing time that results in higher total costs.

Can Optical Glass Be Fire-Rated?

In short, Yes! Optical glass can be fire-resistant for a limit.

Optical glass is not as effective as fire-rated tempered glass but can provide resistance against fire and heat at some point.

However, optical glass offers resistance against thermal shock.

Moreover, optical glass has the ability to withstand normal temperatures.

Can Optical Glass Be Laminated or Tempered?

In general, optical glass cannot be laminated.

The concept of optical laminated glass is using an optical glass interlayer against two outer glass layers.

This glass is mostly utilized for maximum contrast enhancement.

For special environments, including labs, optical laminated glass is required to perform experiments and to enhance safety.

Most importantly, it is important for you to know that optical glass is manufactured using various raw materials.

The involvement of different materials makes optical glass special and cannot be tempered or laminated.

What is the Maximum and Minimum Thickness of Optical Glass?

The optical glass thickness is measured through its refractive index.

SXET is capable of manufacturing optical glass from a minimum of 1.50 to a maximum of 1.74 refractive index thickness.

You can even have an optical glass of 1.90 index thickness between -4 and -8 power.

Moreover, a minimum of 2mm to a maximum of 15mm optical glass thickness is achievable.


Figure 34 – The Maximum and Minimum Thickness of Optical Glass

What is the Maximum Size of Optical Glass?

In general, the size of the optical glass is based on its application.

If it’s a lens, then it will depend on what kind of optical lens it is and what application it serves.

Like it can be a laser lens or camera lens.

Moreover, the optical glass maximum size is 1.5 meters for general purpose applications.

At SXET, you can ask for more because we offer custom sizes for optical glass.

Can You Cut, Grind, and Drill Optical Glass?

In short, yes! SXET provide you the facility of optical glass cutting, grinding, and drilling without affecting its quality and performance.

Both sides of the optical glass can be cut without putting extreme pressure and cracking the glass.

After polishing the optical glass, it can be grinding or drill into a proper shape so that it can fit perfectly for your applications.

At SXET, we also make sure that your glass is scratch-resistance, so even after its finalization, it can be cut, drilled, or grind.


Figure 36 – The Cutting of An Optical Glass to Precisely Shape It

What are the Advantages of Optical Glass?

The optical glass is known to be durable and can have many benefits based on your custom requirements.

The following are some primary advantages of using optical glass:

  • The exceptional light transmission rate of up to 99.2%
  • Provide resistance against Ultraviolet (UV) rays
  • Heat-, Shock-, and Impact-Resistant
  • Provide protection against scratches
  • Waterproof
  • Can be anti-reflective
  • Can be anti-fingerprint
  • The high amount of chemical stability in acid
  • Provide protection against alkali and other corrosive chemicals
  • Constant and accurate
  • Output processed and accurate reflection
  • Up to 99% pure

Moreover, optical glass can have many secondary advantages based on its application.

Is Optical Glass Expensive?

The cost of optical glass depends. It depends on;

  • What are you using it for?
  • What are your requirements?
  • What raw materials are used for their manufacturing?
  • Do you require high-level precision and purity?
  • What custom options you prefer for your optical glass?
  • What are your optical glass preferences?

There can be more, but these are most effective and can affect the overall optical glass cost.

If you want precision optical glass for technologically enhanced devices and leasers, it can be expensive for some.

Because, precision manufacturing and quality testing can cost much more than standard optical glass manufacturing.

In general, optical glass is not expensive for common optical instruments and optical glass windows.

What is the Life-Span of Optical Glass?

There is not a static value that can define the lifespan of optical glass.

There are many factors that affect the quality and lifespan of optical glass, including its;

  • Application
  • Quality
  • Selection of Raw Materials
  • Purity Level
  • Properties
  • Shape and Size
  • Surface Finishes and Coating Applied

Moreover, the optical glass environment is a major factor that can increase or decrease its lifespan.

For example, as a part of medical equipment, optical glass can last for up to 20 years.

And as a part of lasers, optical glass can even last for a lifetime.

How to Import Optical Glass from China?

Importing optical glass from China is not as difficult as some think.

At SXET, we make sure that you have to make as little effort as possible to import optical glass from China.

SXET manufacture custom optical glass for many international customers and guarantee complete satisfaction.

At SXET, your complete satisfaction is our reward, and we make sure you don’t face any difficulties while working with us.

After finalizing your requirements and needs, SXET starts the optical glass manufacturing process.

Afterward, our expert quality tests every single optical glass piece and pack your optical glass order for shipment.

You clear the payments and give us the delivery information required.

You will select the shipment method, and your optical glass order will be on its way.


Figure 40 – Hand Cleaning and Packaging of Optical Glass for Shipment

What Features Enhance the Optical Glass Quality?

Optical glass can be of many qualities based on what you required, and its quality depends on its applications, the selection of raw materials, and its custom options.

Optical glass manufacturing precision and accuracy, along with the top-tier raw materials, can increase the optical glass quality to a limit.

Furthermore, the following features can increase its overall quality:

  • Coatings like anti-fingerprint, anti-scratch, and UV-protective
  • Its resistance against heat, fire, shock, corrosion, and impact
  • Its excellent chemical stability in acid and alkali

Moreover, the more purity an optical glass contains, the more excellent quality it has.

What is the Importance of Optical Glass?

Optical glass has become the most common among optical applications.

Even the concept of precision lenses and pressure sensors is completely based on optical glass.

Moreover, there are many applications that can’t survive without optical glass, including precision glasses and windows.

Its most use is in modern and technologically enhanced mechanical, medical, and laser equipment.

Furthermore, it’s also used in glasses and can be polarized.

Optical glass is an important part of modern society and also promotes an eco-friendly and pollution-free environment.

What are the Considerations for Optical Glass?

The selection of the most suitable optical glass for your needs involves some considerations.

The optical glass considerations are purely based on its properties, including; thermal, mechanical, and optical properties.

Moreover, optical glass considerations define the factors that impact its applications.

The following are some potential consideration for optical glass:

  1. Transparency:Depends on the optical glass purity. The fewer impurities it contains, the more transparent it will be.


  1. Homogeneity:Require slow cooling and proper mixing of raw materials during the optical glass manufacturing stage.


  • Refractive Index:High values are useful for lens applications because it allows weaker curvature to be utilized in an optical lens.


  1. Chromatic Dispersion: A phenomenon mostly used in the optic glass communication field that can result in different colors/wavelengths.


  1. Power: Can be focus power, refractive power, dioptric power, or convergence power of optical glass.


  1. Density: Important to acknowledge when a lightweight optic glass is required.


  • Hardness:Determine the optical glass durability.


  • Melting Point:The point at which optical glass starts melting.

Additionally, you should focus on these considerations before finalizing your custom optical glass.

What is Precision or Technical Optical Glass Manufacturing?

Precision is very important in optical glass manufacturing.

Without precision, you can’t achieve the highest optical glass standards.

Selection and processing of raw materials for high precision optical glass are required for applications including; telecommunication, satellite, machine vision, medical, industrial, and military.

High-quality lenses, precision flats, beam splitters, prisms, complex machine glass, and highly reflective optics required precision or technical optical glass manufacturing.

Sometimes, there are very accurate results required for optical glass.

These accurate results can be related to optical glass refractive index value, Abbe number, thickness, or many more.

That’s why precision and technical accuracy is required for optical glass and can be achieved through this manufacturing process.


Figure 44 – Precision/Technical Manufactured Optical Glass

What is the Design of Optical Glass?

The optical glass designing is performed to meet your performance requirements, including overall cost and manufacturing limitations.

Design of optical glass contains the study of its;

  • Surface Profile
  • Properties
  • Chemical and Physical Behavior
  • Structure

Optical glass thickness, power, characteristics, and glass type are defined in its design.

Each of the optical glass property is connected with the key chemical elements it contains.

Hence, the design of optical glass also includes the study of its properties.

What is the Guarantee of Optical Glass Quality?

The best optical glass quality can be achieved by providing precise detail about the following:

  • Index of Refraction
  • Abbe Number
  • Homogeneity
  • Stress Birefringence
  • Striae
  • Bubble Content
  • Coloring

This way, SXET can give a guarantee of optical glass quality because we will exactly know what you required and will be able to give the required results.

In case your optical glass properties represent complex or high values, please contact SXET so we can guide you further.


Figure 46 – The Guarantee of Optical Glass Quality

Does Optical Glass Provide Resistance Against Acid?

In short, yes! Optical glass can resist the presence of acid.

Acid resistance of optical glass is the study of its behavior in environments contain acidic solutions.

Optical glass remains the same when it comes into contact with acidic solutions.

These acidic solutions also can be carbonated water or laminating substances.

For the optical glass, applications contain the use of acidic solutions that require it to be acid-resistant.

Does Optical Glass Provide Resistance Against Stain?

Yes, optical glass is strain-resistant.

Stain resistance is required in optical glass in conditions or environments that contain lightly acidic water without vaporization.

If the optical glass got in contact with this water, it must resist it without changing its color.

The optical glass color changes indicate a chemical change in its property that can decrease its quality and performance, so it is very crucial for an optical glass to be strain-resistant.

Does Optical Glass Provide Resistance Against Climatic?

Yes, because it’s important for an optical glass to be climatic-resistant.

The climatic resistance of optical glass is its behavior at high temperatures, heat, and high relative humidity.

In a simple glass, due to this condition, a cloudy film appears that cannot be wiped easily.

The behavior of optical glass doesn’t change in these circumstances, and an accelerated procedure is used to test the climate resistance in this optical glass.

However, optical glass is sensitive to climatic influences, and a protective coating is applied to ensure its high stability in extreme humidity.

Does Optical Glass Provide Resistance Against Alkali?

Alkali resistance of optical glass is the study of its behavior changes and sensitivity in environments containing warm alkaline liquids.

Optical glass is not sensitive when it comes into contact with alkali and can perform exceptionally.

These alkaline liquids can be cooling liquids in optical glass polishing and grinding processes.

Optical glass is extremely alkali-resistant and can withstand any kind of after-processing.

Does Optical Glass Provide Resistance Against Phosphate?

The optical glass phosphate resistance is the study of its behavior changes in the presence of phosphate washing solutions.

Optical glass has no effect of phosphate on contact and can resist its presence perfectly.

Yes, the optical glass is phosphate-resistant and can perfectly perform in relative conditions.

What is the Identification of Optical Glass Visible Surface Changes?

It is possible for optical glass to change its visible surface color or structure.

However, it is very rare and mostly happens in the quality testing stage of manufactured optical glass.

At SXET, we identify the visible surface changes of optical glass through the following numbers:

0 – Perfectly manufactured optical glass

1 – Pure and clear but has an irregular surface

2 – Interfere coloring

3 – Cloudy surface and contain a thin white layer

4 – Thicker layers or completely defected optical glass

SXET perform the testing and make sure what pieces of optical glass you have are perfectly manufactured.

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