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Home / All / Quartz Glass FAQ / Q8: What are JGS1, JGS2 and JGS3 optical quartz?

Q8: What are JGS1, JGS2 and JGS3 optical quartz?

Update Time:2026/6/30
A1: They are standard optical quartz grades. JGS1 for deep UV, JGS2 for conventional UV & visible light, JGS3 for infrared applications.



Detailed Explanation
 
JGS1, JGS2 and JGS3 are internationally recognized standard grades for optical fused quartz glass, classified mainly by spectral transmittance range and hydroxyl (OH) content. Each grade is engineered for specific light bands and working environments.
 
1. JGS1
It features ultra-low hydroxyl content and the widest transmission range from 160 nm to 2500 nm. It delivers outstanding transmittance for deep ultraviolet (deep UV) light below 220 nm and has strong resistance to UV aging.
Typical uses: Deep UV lithography, high-precision UV spectrometers, aerospace UV optical windows and professional deep UV laboratory equipment.
2. JGS2
With low hydroxyl content, its transmission spectrum covers 220 nm to 2500 nm. It performs well across conventional ultraviolet and visible light bands, and balances stable performance and cost. It is the most cost-effective general-purpose grade.
Typical uses: UV sterilization lamps, UV curing systems, general laboratory optical instruments and civil UV optoelectronic products.
3. JGS3
This grade has medium hydroxyl content and a transmission range of 260 nm to 3500 nm. It is optimized to reduce infrared absorption, achieving superior transmittance in long-wave infrared bands.
Typical uses: Infrared thermal imaging cameras, infrared detection systems, high-temperature infrared observation windows and industrial infrared temperature measurement devices.
 
 
 
Concise Extended Version (for embedded FAQ block)
 
JGS series optical quartz is graded by spectral performance:
 
- JGS1: 160nm~2500nm, ultra-low OH group, exclusive for deep UV applications.
- JGS2: 220nm~2500nm, balanced performance for regular UV and visible light, widely used for general UV equipment.
- JGS3: 260nm~3500nm, low infrared absorption, specially designed for infrared transmission and thermal imaging.
James Fu, Sales Director of FELIX OPTICAL GLASS, and a poster displaying contact information for an optical glass deep-processing factory.James Fu, Sales Director of FELIX OPTICAL GLASS, and a poster displaying contact information for an optical glass deep-processing factory. 2
Learn more from our FAQ
What is the minimum order quantity for custom precision optical glass components?

FELIX OPTICAL GLASS offers highly flexible MOQs to support customer projects, including prototype testing, small-batch trial orders, and high-volume production. All products can be fully customized to your drawings, tolerances, and application standards. Please send us your specifications, and we will reply within 1-5 hours and provide an accurate quotation after careful evaluation within 1-2 days.

Can I get free glass samples for testing before bulk order?

Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.

What is the production lead time for custom optical glass components?

A: The production cycle for standard samples is 3-10 working days, while mass production requires 15-35 working days, depending on the complexity of the product and the order quantity. We provide reliable precision optical glass components and fast delivery services for orders from industries such as defense, industrial equipment, medical devices, shipbuilding, robotics, automotive, and aerospace. Please submit your project details so we can provide you with an accurate delivery schedule.

Are your optical glass products ISO, CE and RoHS certified?

All precision optical glass components from FELIX OPTICAL GLASS comply with ISO quality system standards as well as CE and RoHS requirements. We provide comprehensive test reports, spectral graphs, material certificates, and inspection documents for customer review. Please feel free to request complete certification details and a formal quotation at any time.

Do you offer one-stop custom optical glass processing services?

Yes. We offer a full range of precision optical glass component processing services, including CNC machining, precision grinding, optical polishing, chemical/physical tempering, vacuum coating (AR anti-reflective coating, AF anti-fingerprint coating, AG anti-glare coating, IR infrared coating), and screen printing. From raw materials to finished products, every step is completed in our own factory. Please tell us your needs, and we will provide you with the most cost-effective solution.

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