Fused Silica With Rounded Corners: Fused Silica (CTE 0.55 x 10^-6 /K, 185 nm – 2.5 um); R0.5 – R50 mm, matched to drawing. Single-piece prototypes to production volumes, quoted from your drawing.
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 rounded corners 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 | Rounded Corners |
| Capability | R0.5 – R50 mm, matched to drawing |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Design guidance
The shop-floor rules that matter here:
- Material note: its hardness and brittleness demand diamond tooling and controlled feeds.
- Feature rule: R2 mm and larger survive handling far better than R0.5.
- 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.
Process window
Beyond this page, Fused Silica routinely runs through ultrasonic machining, grinding, cnc machining, coring in our shop – most real parts combine two or three of these steps.
These features are produced by cnc machining or edge grinding. Capability: R0.5 – R50 mm, matched to drawing. Design rule worth copying onto the drawing: R2 mm and larger survive handling far better than R0.5.
Application context
fused silica with rounded corners shows up across scientific instruments (reference flats, cells, prism mounts, stage inserts); optical sensors (sensor windows, filter caps, lens covers); microfluidic devices (chips, manifolds, via plates, bonded stacks). 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 material selection guide, fused silica material guide, glass-bottom microplates.
Buyer questions, answered
How does Fused Silica 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 near-zero thermal expansion matters.
What is the design rule for rounded corners?
R2 mm and larger survive handling far better than R0.5.
Is there a minimum order for fused silica with rounded corners?
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 August 2026.