Direct supply from Donghai crystal hub to European optical engineers: custom dimensions, high surface figure accuracy, laser processing, and premium thermal resistance.
The municipality of Balzers in southern Liechtenstein represents one of the world's most dense concentrations of high-vacuum deposition technologies, precision optical manufacturing, and surface treatment engineering. Serving as a crucial supplier node, our specialized Chinese manufacturing facility delivers an authoritative technical conduit for high-purity optical fused quartz prisms, fused silica substrates, and advanced thermal apparatus directly integrated into European photonics assembly lines.
When procuring quartz glass prisms, optical light guides, and precision quartz chambers in the Balzers and wider Rhine Valley optical belt, engineers prioritize strict optical homogeneity, zero internal striations, extremely low laser damage thresholds (LDT), and precise angular tolerances down to arcseconds. By refining raw natural crystal in Donghai and utilizing synthetic chemical vapor deposition routes, we ensure our quartz glass components deliver ≥ 99.99% SiO₂ matrix composition, minimal trace bubble inclusions, and exceptional optical transmission ranging from deep ultraviolet (DUV 185 nm) through near-infrared bands (2500 nm).
| Physical / Optical Property | Standard Synthetic Fused Silica (JGS1 Grade) | Optical Fused Quartz (JGS2 Grade) | Thermal/Semiconductor Grade (JGS3 / Clear) |
|---|---|---|---|
| SiO₂ Chemical Purity | ≥ 99.999% | ≥ 99.99% | ≥ 99.95% |
| Main Spectral Transmission Window | 185 nm – 2500 nm (High DUV / UV) | 220 nm – 2500 nm (UV-VIS) | 260 nm – 3500 nm (NIR / Thermal) |
| Refractive Index (n_d, 587.6 nm) | 1.45846 | 1.45840 | 1.45850 |
| Continuous Operating Temperature | 1100 °C | 1100 °C | 1150 °C |
| Annealing / Strain Point | 1140 °C / 1070 °C | 1215 °C / 1120 °C | 1215 °C / 1120 °C |
| Thermal Expansion Coeff. (α) | 5.5 × 10⁻⁷ / K | 5.5 × 10⁻⁷ / K | 5.4 × 10⁻⁷ / K |
| Surface Quality Capability | 10-5 Scratch-Dig / λ/10 flatness | 20-10 Scratch-Dig / λ/4 flatness | 40-20 Scratch-Dig / Commercial Polish |
The manufacturing ecosystem of Balzers thrives upon advanced physical vapor deposition (PVD), plasma-assisted chemical vapor deposition (PACVD), and electron beam evaporation tooling. Our quartz glass prisms and companion high-pressure components are deployed directly across critical industrial segments:
1. High-Vacuum PVD & Optical Monitor Prisms: Inside Balzers-type box coaters and high-rate vacuum deposition chambers, optical monitoring systems (OMS) require precision quartz turning prisms, witness plates, and high-temperature sight glasses to measure layer thickness and optical reflectance in real-time. Our optical prisms maintain structural integrity without structural shifting across elevated internal thermal cycles up to 450 °C during ion-assisted deposition (IAD).
2. Laser Guiding, Beam Splitting & Medical Optics: Modern laser systems developed along the Liechtenstein-Swiss Rhine corridor demand minimal thermal lensing. Custom Right-Angle Prisms, Porro Prisms, Dove Prisms, and Penta Prisms ground from our pure quartz ingots guarantee minimal absorption coefficients, resisting beam disruption under high-power CW and femtosecond pulsed laser regimes.
3. Semiconductor Process Tooling & Photolithography: Balancing extreme chemical resistance with thermal tolerance, our custom quartz frosted cylinders, twin-bore sensor housings, and ozone-free ampoules function seamlessly alongside thin-film lithography lines, chemical degradation setups, and wafer annealing furnaces without ionic contamination.
Why precision photonics and industrial equipment buyers choose Zelvo Quartz as their direct production partner in China.
Situated in China's "Crystal Capital", we integrate regional high-purity quartz sands, guaranteeing traceable raw materials, reliable supply continuity, and significant cost advantages for European clients.
Our workshop pairs 10+ year veteran glass craftsmen with automated laser micro-machining, achieving tight tolerances of ±0.02 mm, chamfered bevels, complex prism face polishing, and slotting.
Each prism and quartz apparatus undergoes laser transmission testing, bubble/inclusion counting according to DIN ISO 10110 standards, and full dimensional verification with visual inspection reporting.
We actively support engineering research departments, test setups, and pilot production in Balzers, offering rapid single-piece customized milling from 2D/3D CAD technical drawings.
From initial design quotation to delivery at your doorstep, we manage FOB, CIF, EXW, and reliable door-to-door DDP shipments with verified European logistics operators, accepting multi-currency invoicing.
Fragile optical prism geometries and extended quartz tubes are protected using multi-layer shock-absorbent custom foam inserts, vapor barriers, and vacuum-sealed, reinforced export wooden crates.
Direct view into our factory operations, glass-blowing torches, and optical inspection equipment.
The requirements placed on precision quartz manufacturers are rapidly shifting due to major innovations within Liechtenstein and neighboring Swiss cantons:
Rising Demand for Deep Ultraviolet (DUV) Optics: With semiconductor lithography equipment operating at shorter wavelengths and advanced excimer laser material processing evolving, standard optical glass no longer suffices. Balzers engineers increasingly design with high-purity synthetic fused silica (OH-rich or OH-suppressed depending on NIR vs. DUV prioritization). We support this shift by offering certified synthetic ingots with laser damage thresholds surpassing 15 J/cm² at 248/355 nm.
Monolithic Hybridization of Tubes & Optics: Traditional designs separated optical prism windows from process reactor bodies via metal flanges and O-rings. Modern vacuum coating and high-temperature plasma degradation systems require monolithic fused bodies where quartz windows, twin-bore channels, and reaction tubes are flame-welded together. This eliminates vacuum leaks and removes contamination risks during thin-film deposition.
Clear, direct answers regarding specifications, import compliance, and engineering capabilities.
Submit your CAD drawing, technical sketches, or component specifications. Our factory sales engineering staff will evaluate manufacturability and provide an official quotation within 2 business hours.