Fused Silica Optical Glass | UV Quartz Glass Substrate - Felix Glass
Fused Silica Optical Glass
Fused silica (also widely called fused quartz or quartz glass) is an amorphous silica material celebrated for exceptional ultraviolet transmission, ultra-low coefficient of thermal expansion and superior heat resistance. It covers optical-grade substrates for UV optics, as well as custom quartz glass tubes, rods and furnace components for high-temperature industrial processes. For precision optical elements, we adopt synthetic UV-grade fused silica with strict homogeneity control.
Key Optical & Physical Properties
| Parameter | Specification |
|---|---|
| Transmission Range | 185 nm – 2.5 μm |
| Refractive Index (@632.8nm) | 1.4585 |
| Abbe Number | 67.77 |
| Knoop Hardness | 580 Knoop |
| Density | 2.20 g/cm³ |
| Coefficient of Thermal Expansion | 0.55 ×10⁻⁶ /K |
Common Optical Components We Fabricate
- Fused silica spherical lenses: plano-convex, plano-concave, biconvex lenses for UV lasers
- Fused silica protective windows, vacuum viewports and high-temperature optical covers
- Optical flats, reference flat substrates for interferometer and precision metrology
- Custom fused silica blanks, wedges, prisms and flow cell windows
Available Coating Options
We provide specialized coatings designed for fused silica UV and laser applications:
- Deep UV AR coating: 248nm, 266nm, 308nm, 355nm excimer & solid-state laser
- Broadband UV-VIS-NIR anti-reflection coating (200–1100 nm)
- High damage threshold AR coating for high-power laser systems
- Metal & dielectric reflective coatings for UV mirrors
Typical Application Fields
- UV laser systems: excimer laser, 355nm / 266nm frequency tripled lasers
- Aerospace & satellite optics, space-grade optical assemblies
- High-temperature furnace viewports, vacuum chamber windows
- Spectroscopy, UV fluorescence analysis and biochemical instruments
- Interferometry, optical metrology and precision optical testing
Machining Capacity & Quality Control
Felix Glass uses high-purity UV-grade fused silica raw material. We deliver components with scratch-dig grade up to 10/5, surface flatness down to λ/20 @632.8 nm. We support round, square, rectangular and complex custom shapes, with tight tolerances for laser, aerospace and R&D prototype & volume orders.
We also fabricate custom quartz glass tubes, quartz rods and quartz crucibles for furnace, lab and semiconductor applications. Contact us for quartz tubular component drawing review.
Datasheet & Custom Inquiry
Download our fused silica datasheet for full transmission curve and thermal parameters. Send your drawing, working wavelength and coating specs for custom quotation.
Request Datasheet & Custom Quote
