Double-Side Polishing JGS1 Quartz Glass – JGS1 Quartz Glass (CTE 0.55 x 10^-6 /K, 185 nm – 2.5 um (UV grade)); Double-Side Polishing to TTV under 3 um. No minimum order; DFM review included with every RFQ.
We DSP-polish JGS1 Quartz Glass daily, in thicknesses from 0.1 – 10 mm. The controlling numbers: TTV under 3 um working tolerance, Ra below 0.5 nm both faces minimum features, and 60/40 to 20/10 both faces off the machine. Where the drawing asks for more, downstream lapping and polishing take over.
Specifications at a glance
| 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 |
| Process | Double-Side Polishing |
| Working tolerance | TTV under 3 um |
| Minimum feature | Ra below 0.5 nm both faces |
| Surface finish | 60/40 to 20/10 both faces |
| Thickness window | 0.1 – 10 mm |
| Edge condition | edge-rounded before DSP |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Manufacturing capability
The core strength of Double-Side Polishing is wafer-grade parallelism and sub-nanometer roughness on both faces simultaneously. The honest limit: parts must be round or near-round; strongly asymmetric outlines wedge in the carriers. Both belong on the drawing before quoting, not after.
One material, many routes: on JGS1 Quartz Glass we also quote edge grinding, grinding, cnc machining, ultrasonic machining, and multi-step drawings are the norm rather than the exception.
DFM notes from the shop floor
Three items decide most of the cost and lead time on this work:
- Material note: UV-grade surfaces must be polished without subsurface damage that scatters below 250 nm.
- Process boundary: parts must be round or near-round; strongly asymmetric outlines wedge in the carriers.
- 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.
The full rules live in our tolerance design guide and holes and edges design guide.
Typical applications
double-side polishing jgs1 quartz glass shows up across 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 builder below, or open the full custom glass machining 3D builder to start from a blank canvas.
For adjacent specifications, see JGS1 quartz glass, fused silica wafers 2-12 inch, CNC machining capability.
Common questions
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.
What thickness range do you stock for JGS1 Quartz Glass?
Standard stock spans 0.10 – 30 mm, with blanks up to 300 mm diameter. Other formats are sourced per order.
How does JGS1 Quartz Glass behave under heat?
CTE is 0.55 x 10^-6 /K and continuous service reaches 1,100 C continuous, which is what drives its use where deep-UV transmission to 185 nm matters.
What accuracy does double-side polishing hold?
TTV under 3 um with minimum features of Ra below 0.5 nm both faces. Parts must be round or near-round; strongly asymmetric outlines wedge in the carriers.
What equipment runs the double-side polishing work?
Planetary double-side polishers with carrier plates.
Specifications on this page were last reviewed by our engineering team in July 2026.