Fused Silica Optical Glass | UV Quartz Glass Substrate - Felix Glass
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- Felix Glass Co., Limited
- Issue Time
- Oct 21,2026
Summary
Fused silica, also known as quartz glass, offers excellent UV transmission & low thermal expansion. Felix Glass supplies fused silica optics and custom quartz glass tubes for UV laser systems.
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