Quick answer: Surface Roughness for Optical Glass covers Ra < 0.5 nm polished, 0.2 – 0.8 um ground. Prototypes ship in 5-10 working days.
Drawings fail at the tolerance block more than anywhere else. For surface roughness for optical glass the achievable envelope is Ra < 0.5 nm polished, 0.2 – 0.8 um ground – the method is white-light interferometry verification.
The numbers
| Held tolerance | Ra < 0.5 nm polished, 0.2 – 0.8 um ground |
|---|---|
| Method | white-light interferometry verification |
| Reference standard | ISO 10110-8 surface texture |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Getting the drawing right
Before sending the RFQ, check these against your drawing:
- Cite ISO 10110-8 surface texture on the drawing so both sides measure the same way.
- 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
surface roughness for optical glass shows up across laboratory instruments (cuvettes, sight glasses, stir-cell windows); scientific instruments (reference flats, cells, prism mounts, stage inserts); semiconductor equipment (view ports, wafer carriers, plasma rings, chamber windows).
If the part is easier to draw than describe, the custom glass machining 3D + 2D builder turns dimensions into an RFQ in a few minutes.
Useful companion pages: microfluidic glass applications, custom ITO glass, custom microfluidic chip.
Frequently asked questions
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.
Which standard governs this?
ISO 10110-8 surface texture, verified by white-light interferometry verification.
Specifications on this page were last reviewed by our engineering team in August 2026.