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When an optical system operates in the ultraviolet range, the choice of window material can directly affect optical transmission, signal quality, thermal stability, and long-term reliability.
JGS1 quartz windows are UV-grade optical quartz components designed for applications requiring high ultraviolet transmission and reliable performance across a wide optical spectrum. JGS1 fused silica is commonly selected for UV optical windows, laser systems, spectroscopy equipment, semiconductor applications, and other precision optical systems.
With custom sizes, thicknesses, surface finishes, polishing and coating options available, JGS1 quartz windows can be manufactured according to specific optical and mechanical requirements.
A JGS1 quartz window is a precision optical window manufactured from JGS1 UV-grade synthetic fused silica.
Unlike ordinary glass, optical quartz offers excellent ultraviolet transmission, low thermal expansion, high thermal stability, and strong resistance to many chemicals. JGS1 is particularly suitable when optical components need to operate in the deep UV and UV spectral regions.
Typical JGS1 quartz windows are available in round, square, rectangular, and other custom shapes.
Depending on the application, customers can specify dimensions, thickness, surface quality, flatness, parallelism, polishing method, edge processing, and optical coatings.


One of the main advantages of JGS1 quartz is its ultraviolet transmission performance.
JGS1 optical quartz is commonly specified for approximately 185–2500 nm, making it suitable for many UV, visible, and near-infrared optical applications. Published material data can vary between manufacturers and specifications, so the actual transmission requirement should be confirmed according to the required wavelength, window thickness, and optical grade.
For demanding UV applications, we recommend providing the target operating wavelength when requesting a quotation. This allows the material and optical specifications to be selected according to the actual application.
| Property | JGS1 Quartz |
|---|---|
| Material | UV-grade synthetic fused silica |
| Typical Transmission Range | Approx. 185–2500 nm |
| Main Optical Advantage | Excellent UV transmission |
| Thermal Expansion | Very low |
| Thermal Stability | Excellent |
| Chemical Resistance | Excellent |
| Optical Applications | UV, visible and selected NIR systems |
| Shapes | Round, square, rectangular, custom |
| Surface Processing | Polished, optical polished, DSP/SSP |
| Coating | AR coating available upon request |
Specifications may vary according to material grade, dimensions, thickness, surface treatment and manufacturing requirements.
1. Excellent UV Transmission
JGS1 is designed for optical applications requiring strong UV transmission, including deep-UV systems. This makes it a suitable material for UV optical windows, laser components, spectroscopy equipment and precision instruments.
2. Wide Spectral Operating Range
JGS1 can provide useful transmission from the deep UV through the visible and into the near-infrared region. This broad range makes it suitable for optical systems that operate across multiple wavelengths.
3. Low Thermal Expansion
Quartz has a very low coefficient of thermal expansion. As a result, JGS1 windows can maintain good dimensional stability when exposed to temperature changes.
This property is particularly useful for optical equipment that experiences thermal cycling or operates near heat sources.
4. Excellent Thermal Stability
JGS1 fused silica offers strong resistance to thermal shock and high-temperature environments compared with many conventional optical glasses.
For this reason, quartz windows are widely used in optical and industrial equipment where both optical performance and thermal stability are important.
5. High Chemical Resistance
Fused silica provides excellent resistance to many acids and chemicals. This makes JGS1 quartz windows suitable for laboratory instruments, semiconductor equipment and other environments where optical components may be exposed to aggressive chemicals.
6. Suitable for Precision Optical Components
JGS1 can be processed into precision windows with controlled dimensions and optical surface specifications.
Depending on the application, manufacturers can provide different polishing levels, surface quality, flatness, parallelism, edge processing and optical coatings


JGS1 quartz windows are used in a wide range of optical and industrial applications.
1. UV Spectroscopy
UV spectrometers and analytical instruments require optical windows with reliable UV transmission. JGS1 can be used as an optical window or protective window in UV spectroscopy systems.
2. UV Laser Systems
UV laser systems require optical materials with suitable transmission and surface quality at the operating wavelength.
JGS1 quartz windows can be used in laser systems as beam windows, protective windows and other optical components.
3. Semiconductor Equipment
UV-grade fused silica is widely used in semiconductor-related optical systems because of its optical, thermal and chemical properties.
JGS1 quartz windows may be used in inspection equipment, optical measurement systems, UV illumination systems and other semiconductor process equipment.
4. Photolithography and UV Imaging
Precision UV imaging and lithography systems require optical materials with good UV transmission and dimensional stability.
JGS1 is suitable for certain UV optical components where transmission and optical quality are important.
5. Fluorescence and Analytical Instruments
UV excitation is commonly used in fluorescence analysis and laboratory instruments.
JGS1 windows can help provide a suitable optical path for UV excitation and detection systems.
6. Scientific Research Equipment
Research laboratories often require custom optical components rather than standard catalog sizes.
JGS1 quartz windows can be manufactured in customized dimensions and shapes for optical experiments, spectroscopy, laser systems and laboratory equipment.


JGS1 and JGS2 are both optical quartz materials, but they are commonly selected for different optical requirements.
| Feature | JGS1 Quartz | JGS2 Quartz |
|---|---|---|
| Primary Focus | Deep UV / UV optics | General UV optics |
| Typical Transmission Range | Approx. 185–2500 nm | Approx. 220–2500 nm |
| Deep UV Performance | Excellent | Good |
| Typical Applications | UV lasers, DUV optics, spectroscopy | General UV optics, optical windows |
| Custom Sizes | Available | Available |
| Custom Polishing | Available | Available |
| Optical Coating | Available upon request | Available upon request |
If your system operates below approximately 220 nm, JGS1 should be considered first because of its stronger deep-UV transmission capability.
For applications mainly operating at longer UV, visible, or near-infrared wavelengths, JGS2 may also be suitable depending on the required optical specifications.
The final material selection should always be based on the actual operating wavelength, thickness, transmission requirement and optical quality requirements.
Standard optical windows are not always suitable for OEM equipment.
If your application requires a specific size, thickness, shape or optical specification, custom JGS1 quartz windows can be manufactured according to your drawing or technical requirements.
Shape
Dimensions
Surface Processing
Edge Processing
Optical Coatings
For precision applications, additional specifications such as flatness, parallelism, wedge, surface quality, scratch-dig, optical homogeneity and inclusion requirements can also be discussed.
To provide an accurate quotation, please send us the following information:
1. Material: JGS1 Quartz / Fused Silica
2. Shape: Round / Square / Rectangular / Custom
3. Size: Diameter or L × W
4. Thickness: ___ mm
5. Quantity: ___ pcs
6. Surface finish: SSP / DSP / Optical Polish
7. Surface quality: e.g. 40/20, 20/10, 10/5
8. Flatness: ___
9. Parallelism: ___
10. Operating wavelength: ___ nm
11. Coating: None / AR / Custom
12. Drawing: Available if applicable
If you do not have a complete specification, simply send us your application, wavelength, size, thickness and quantity.
Our technical team can help review the requirements and recommend an appropriate JGS1 quartz window specification.
We supply custom quartz and optical glass components for industrial, optical, semiconductor and research applications.
Our JGS1 quartz windows can be manufactured according to customer drawings and technical specifications, including customized dimensions, thicknesses, polishing, surface quality and optical coatings.
Whether you need a small quantity for laboratory testing or customized components for OEM production, we can discuss the required material grade, optical specifications and manufacturing process based on your application.
Our goal is to provide not only a quartz window, but an optical component that matches the actual requirements of your equipment.
Looking for a reliable supplier of JGS1 quartz windows?
Send us your specifications or drawing for a quotation.
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Need help selecting the right quartz grade?
Send us your application and operating wavelength. Our team can help you compare JGS1, JGS2 and other fused silica options and recommend a suitable specification for your project.
Send your drawing or requirements today to receive a customized quotation.