Fused Silica With Slots – Fused Silica (CTE 0.55 x 10^-6 /K, 185 nm – 2.5 um); width from 0.4 mm, length any, ends R0.2 mm min. No minimum order; DFM review included with every RFQ.
When a drawing calls out Fused Silica, three numbers matter before any machining starts: CTE of 0.55 x 10^-6 /K, service temperature to 1,100 C continuous, and a transmission window of 185 nm – 2.5 um. fused silica with slots here begin with those numbers and end with dimensional reports.
Key parameters
| Material | Fused Silica (JGS1 (UV), JGS2 (standard), JGS3 (IR)) |
|---|---|
| Thermal expansion (CTE) | 0.55 x 10^-6 /K |
| Service temperature | 1,100 C continuous |
| Transmission range | 185 nm – 2.5 um |
| Density | 2.20 g/cm3 |
| Knoop hardness | 500 kg/mm2 |
| Refractive index | 1.458 @ 587 nm |
| Stock thickness | 0.10 – 50 mm |
| Maximum blank size | 450 x 450 mm |
| Feature | Slots |
| Capability | width from 0.4 mm, length any, ends R0.2 mm min |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
DFM notes from the shop floor
Three items decide most of the cost and lead time on this work:
- Material note: its hardness and brittleness demand diamond tooling and controlled feeds.
- Feature rule: slot web between features at least 1x thickness.
- 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.
Manufacturing capability
One material, many routes: on Fused Silica we also quote drilling, lapping, double-side polishing, laser cutting, and multi-step drawings are the norm rather than the exception.
These features are produced by cnc machining or laser cutting. Capability: width from 0.4 mm, length any, ends R0.2 mm min. Design rule worth copying onto the drawing: slot web between features at least 1x thickness.
Where these parts end up
The recurring buyers of fused silica with slots: aerospace optics (sensor windows, star-tracker flats, radiation-tolerant ports); mems devices (cap wafers, TGV substrates, motion-sensor lids); optical sensors (sensor windows, filter caps, lens covers). 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.
Engineers scoping this work usually also review fused silica material guide, fused silica wafers 2-12 inch, microfluidic glass applications.
Frequently asked questions
Is there a minimum order for fused silica with slots?
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.
Do parts ship with inspection data?
Dimensional reports, surface certificates and material certs per melt are available; specify the level on the RFQ.
Specifications on this page were last reviewed by our engineering team in September 2026.