Grinding JGS1 Quartz Glass – JGS1 Quartz Glass (CTE 0.55 x 10^-6 /K, 185 nm – 2.5 um (UV grade)); Grinding to flatness to 5 um over 100 mm. No minimum order; DFM review included with every RFQ.
We grind JGS1 Quartz Glass daily, in thicknesses from 0.3 – 60 mm. The controlling numbers: flatness to 5 um over 100 mm working tolerance, thickness to +/-0.005 mm minimum features, and Ra 0.2 – 0.8 um 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 | Grinding |
| Working tolerance | flatness to 5 um over 100 mm |
| Minimum feature | thickness to +/-0.005 mm |
| Surface finish | Ra 0.2 – 0.8 um |
| Thickness window | 0.3 – 60 mm |
| Edge condition | ground perimeter, squareness 0.02 mm |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
What the process holds
Grinding earns its place through bringing thickness, flatness and parallelism into calibrated tolerance before polish. Its boundary condition – subsurface damage of 5 – 15 um must be budgeted and removed by polishing on optical faces – is the first thing our DFM review checks.
Beyond this page, JGS1 Quartz Glass routinely runs through cnc machining, double-side polishing, sandblasting, lapping in our shop – most real parts combine two or three of these steps.
Getting the drawing right
The shop-floor rules that matter here:
- Material note: UV-grade surfaces must be polished without subsurface damage that scatters below 250 nm.
- Process boundary: subsurface damage of 5 – 15 um must be budgeted and removed by polishing on optical faces.
- 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.
Who orders this
The recurring buyers of grinding jgs1 quartz glass: 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.
The fastest route to a quote is geometry: use the 3D builder below, draw a dimensioned 2D drawing from it, or open the site-wide custom glass machining 3D + 2D builder for fully custom parts.
Related reading on this site: JGS1 quartz glass, precision glass grinding, fused silica wafers 2-12 inch.
Frequently asked questions
What equipment runs the grinding work?
Rotary surface grinders and double-disc machines with diamond wheels.
Is there a minimum order for grinding jgs1 quartz glass?
No. Single prototypes are accepted, and pricing steps down at 10, 100 and 1,000 pieces.
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.
Specifications on this page were last reviewed by our engineering team in September 2026.