Dichroic Coating Optical Glass: Optical Glass (CTE 7.1 x 10^-6 /K, 350 nm – 2.0 um); cut-on/cut-off slopes < 2% of edge wavelength. Single-piece prototypes to production volumes, quoted from your drawing.
dichroic coating optical glass is thin-film interference stack applied by ion-beam sputtering, 40 – 120 layers. On Optical Glass it wavelength-selective reflection and transmission – the specification we run to is cut-on/cut-off slopes < 2% of edge wavelength.
Specification envelope
| Material | Optical Glass (N-BK7, H-K9L and filter glass sets) |
|---|---|
| Thermal expansion (CTE) | 7.1 x 10^-6 /K |
| Service temperature | 400 C (Tg 557 C) |
| Transmission range | 350 nm – 2.0 um |
| Density | 2.51 g/cm3 |
| Knoop hardness | 610 kg/mm2 |
| Refractive index | 1.5168 @ 587 nm |
| Stock thickness | 0.30 – 50 mm |
| Maximum blank size | 300 mm diameter |
| Treatment | Dichroic Coating – thin-film interference stack |
| Specification | cut-on/cut-off slopes < 2% of edge wavelength |
| Deposition / method | ion-beam sputtering, 40 – 120 layers |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Manufacturing capability
One material, many routes: on Optical Glass we also quote drilling, edge grinding, polishing, cnc machining, and multi-step drawings are the norm rather than the exception.
Specification advice
Three items decide most of the cost and lead time on this work:
- Material note: index-certified blanks must be oriented and serialized through the shop to keep melt traceability.
- Sequence matters: all machining happens before dichroic coating; post-coating rework is not economical.
- 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
dichroic coating optical glass shows up across optical sensors (sensor windows, filter caps, lens covers); scientific instruments (reference flats, cells, prism mounts, stage inserts); ccd inspection equipment (CCD cover plates, reference grids, stage glass). Background reading on the underlying material science: RP Photonics: optical glass.
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 AR coated glass materials, JGS1 quartz glass, edge grinding overview.
Frequently asked questions
How does Optical Glass behave under heat?
CTE is 7.1 x 10^-6 /K and continuous service reaches 400 C (Tg 557 C), which is what drives its use where certified refractive index and dispersion matters.
What does dichroic coating add?
Wavelength-selective reflection and transmission. Applied by ion-beam sputtering, 40 – 120 layers to cut-on/cut-off slopes < 2% of edge wavelength.
Is there a minimum order for dichroic coating optical 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.
Specifications on this page were last reviewed by our engineering team in August 2026.