Quick answer: 2 Inch (50.8 mm) JGS1 Quartz Glass Wafers covers JGS1 Quartz Glass (CTE 0.55 x 10^-6 /K, 185 nm – 2.5 um (UV grade)); 50.8 mm format, TTV <5 um. Prototypes ship in 5-10 working days.
A wafer is a specification bundle, not just a disc. 2 inch (50.8 mm) jgs1 quartz glass wafers here mean UV-grade synthetic, bubble class 0 material with certified CTE of 0.55 x 10^-6 /K, TTV controlled per format, and edges profiled for handler compatibility.
The numbers
| Material | JGS1 Quartz Glass (UV-grade synthetic, bubble class 0) |
|---|---|
| Thermal expansion (CTE) | 0.55 x 10^-6 /K |
| Service temperature | 1,100 C continuous |
| Transmission range | 185 nm – 2.5 um (UV grade) |
| Density | 2.20 g/cm3 |
| Knoop hardness | 500 kg/mm2 |
| Refractive index | 1.458 @ 587 nm |
| Stock thickness | 0.10 – 30 mm |
| Maximum blank size | 300 mm diameter |
| Diameter / format | 50.8 mm |
| Thickness | 0.2 – 1.0 mm typical |
| TTV | <5 um |
| Flat / notch | SEMI or C-flat |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Specification advice
Before sending the RFQ, check these against your drawing:
- Material note: UV-grade surfaces must be polished without subsurface damage that scatters below 250 nm.
- Specify flat or notch orientation relative to your device layout – regrinding orientation later scraps the wafer.
- Over-specification is the quiet budget killer: a 20/10 scratch-dig face costs roughly three times an 80/50 face, so grade each surface individually.
For the complete framework, see the tolerance design guide and the holes and edges design guide.
Process window
Beyond this page, JGS1 Quartz Glass routinely runs through etching, double-side polishing, polishing, grinding in our shop – most real parts combine two or three of these steps.
Who orders this
The recurring buyers of 2 inch (50.8 mm) jgs1 quartz glass wafers: laser systems (windows, beam splitters, debris shields); aerospace optics (sensor windows, star-tracker flats, radiation-tolerant ports). Background reading on the underlying material science: RP Photonics: fused silica.
Dimensions still moving? Configure this part live in the 3D + 2D builder below, or open the full custom glass machining 3D + 2D builder to start from a blank canvas.
Useful companion pages: JGS1 quartz glass, fused silica wafers 2-12 inch, fused silica wafer applications.
Buyer questions, answered
How fast can prototypes ship?
Machined prototypes ship in 5 – 10 working days. Coated or bonded parts add 1 – 2 weeks depending on queue slots.
What files do you need for a quote?
A dimensioned PDF plus DXF or STEP geometry. If only a sketch exists, our drawing review service formalizes it before quoting.
Do parts ship with inspection data?
Dimensional reports, surface certificates and material certs per melt are available; specify the level on the RFQ.
What tolerances are achievable on JGS1 Quartz Glass parts?
Ground features hold +/-0.01 mm and lapped thickness reaches +/-0.003 mm. UV-grade surfaces must be polished without subsurface damage that scatters below 250 nm.
Specifications on this page were last reviewed by our engineering team in September 2026.