High-Performance Fused Silica Windows & Custom Optics
Machined from 99.99% high-purity SiO2 ingots to satisfy stringent wavefront distortion, optical homogeneity, and thermal resilience criteria. Each product below is fabricated to drawing specifications with rapid West End dispatch.
China Supplier High Temperature Transparent UV Quartz Glass Plate Polished Fused Quartz Disc Welding Cutting Optics 1100C Work
Custom Size High Temperature Fused Transparent Quartz Glass Optical Grade Test Sample Sheet Welding Cutting Processing Service
Customizable High Pressure High Quality Polished Clear Transparent 99.99% Pure Quartz Glass Twin Tube Bending/Welding/Cutting
Custom Size Clear Fused Quartz Plate Premium Quality High Temperature Resistance (1100C) Glass Sheet for Optics Welding
Custom Guitu Quartz GT Model High Purity Optical Quartz Light Guide Cylinder Rod 99.99% SiO2 for Optical/Semiconductor
Open Ended Fused Quartz Frosted Glass Cylinder Ingot with Moulding Welding Cutting Services Custom Sizes for Optics Applications
High Temperature Resistance Frosted Quartz Disc/Plate Semiconductor Applications Welding Cutting Custom Sizes Fused Quartz
Factory Custom High Pressure 99.99% Pure Quartz Glass Tube Bending/Welding Ozone Free Polished Surface
Material Science of Synthetic Fused Silica vs. Natural Fused Quartz Windows
Selecting transmission optics for West End precision instrument developers requires a granular assessment of bubble classification, hydroxyl [OH⁻] radical concentration, transmissive wavefront distortion, and laser damage resistance.
Synthetic Fused Silica (JGS1 Grade)
Synthesized via chemical vapor deposition (CVD) of silicon tetrachloride (SiCl4) in an oxy-hydrogen flame. This synthetic method produces an amorphous, carbon-free matrix devoid of metallic micro-impurities (Fe, Ti, Al < 0.1 ppm).
- Transmission Window: 185 nm to 2500 nm (Extreme Deep UV to NIR).
- Absorption Spectrum: Zero absorption bands across 248 nm (KrF) and 193 nm (ArF).
- Bubble Class: DIN ISO 10110 Class 0 (Virtually bubble and inclusion free).
- West End Use: Excimer laser optics, semiconductor wafer viewports, flow cytometry.
Optical Fused Quartz (JGS2 Grade)
Manufactured through electric vacuum fusion or hydrogen flame fusion of naturally occurring high-purity crystalline Donghai quartz sand. It preserves exceptional structural stiffness and thermo-mechanical endurance at a competitive cost.
- Transmission Window: 260 nm to 3500 nm (Near UV to Mid-IR).
- OH Content: Typically 30 ppm to 150 ppm, minimizing OH vibrational bands in NIR.
- Thermal Resilience: Continuous 1100°C; excursion point up to 1300°C without devitrification.
- West End Use: High-temperature furnace viewports, plasma spectroscopy, thermal imaging.
Laser Damage Threshold (LIDT)
Optics specified for high-power laser facilities within London and West End university incubators necessitate certified LIDT metrics. Our planetary polishing reduces subsurface mechanical fractures to sub-angstrom thresholds.
- Pulsed Threshold: > 10 J/cm² @ 1064 nm (10 ns pulse, 20 Hz Repetition Rate).
- UV Excimer LIDT: > 3.5 J/cm² @ 355 nm (8 ns pulse duration).
- Surface Roughness (Ra): Super-polished down to Ra < 0.3 nm (3 Ångströms).
- Surface Figure: λ/10 to λ/20 peak-to-valley across clear apertures.
| Property Parameter | Synthetic Fused Silica (JGS1 / 7980) | Optical Fused Quartz (JGS2) | Infrared Fused Silica (JGS3 / Low-OH) | Measurement Standard |
|---|---|---|---|---|
| Refractive Index (nd @ 587.6 nm) | 1.45846 ± 0.00005 | 1.45840 ± 0.00010 | 1.45845 ± 0.00005 | ISO 12123 Abbe Metrology |
| Index Homogeneity (Δn) | Class H4 (< 2 × 10-6) | Class H2 (< 1 × 10-5) | Class H3 (< 5 × 10-6) | Zygo GPI Phase Interferometry |
| Coefficient of Thermal Expansion (0–300°C) | 5.5 × 10-7 K-1 | 5.4 × 10-7 K-1 | 5.5 × 10-7 K-1 | ASTM E228 Push-Rod Dilatometer |
| Softening Point (°C) | 1585 °C | 1683 °C | 1600 °C | ASTM C338 Fiber Elongation |
| Annealing Point (°C) | 1120 °C | 1215 °C | 1140 °C | ASTM C336 Beam Bending |
| Hydroxyl [OH⁻] Content | 800 – 1200 ppm (UV Stable) | 30 – 180 ppm | < 1 ppm (Dry Matrix) | FTIR Spectrometry @ 2.73 μm |
| Dielectric Constant (1 MHz @ 20°C) | 3.78 | 3.75 | 3.79 | IEC 60250 Bridge System |
Precision Integration Across the West End High-Tech & Research Belt
The West End commercial, academic, and industrial ecosystem represents one of Europe's most rigorous testing grounds for transmissive optical components. Our custom-fabricated fused silica windows serve crucial mission-critical roles in advanced hardware deployments across this sector.
Quantum Optics & Cold Atom Trapping
London-area quantum computing initiatives and specialized academic spinouts require optical viewports that eliminate phase distortion while maintaining ultra-high vacuum (UHV, < 10-10 mbar) seal integrity.
- Zero birefringence under mechanical clamping stress.
- Custom CF (ConFlat) glass-to-metal brazed or flanged disc assemblies.
- Anti-reflective (AR) V-coatings tuned for 780 nm (Rubidium) & 852 nm (Cesium).
Semiconductor Metrology & Inspection
Supporting tier-1 equipment designers who feed the European chip corridor with automated wafer defect inspection tools, UV photolithography alignment systems, and chemical-mechanical planarization (CMP) monitors.
- Excimer-grade UV synthetic fused silica flat to λ/20.
- Zero fluorescence under intense 266 nm continuous-wave interrogation.
- Strict DIN ISO 10110 scratch-dig 10-5 criteria on operational surfaces.
Bio-Photonics & Flow Cytometers
West End medical research institutes, biosensor startups, and clinical diagnostic laboratories require micro-fluidic flow cells and viewing plates with total optical neutrality and chemical passivation.
- Immunity to organic solvent breakdown and nitric/sulfuric acid baths.
- Precision laser micro-drilled fluidic ports down to 0.1 mm diameter.
- Uninterrupted transmission across UV-visible fluorescent marker wavelengths.
Aerospace & Defense Laser Windows
Defense contractors and electro-optical sensor manufacturers active in UK and western defense clusters deploy our high-pressure window blanks for tactical telemetry, target designation, and flight instrumentation.
- Withstands thermal shocks up to ΔT = 1000°C without mechanical failure.
- High mechanical compressive strength (> 1100 MPa) against atmospheric loading.
- Flame-polished chamfers to arrest shear stress fractures along structural bevels.
West End Procurement Trends: Transitioning from Middlemen to Direct Fab
Optical system integrators across western industrial corridors face increasing pressures around lead times, unit costs, and drawing-to-part compliance. Here is how modern procurement dynamics are shifting.
1. Disintermediation of High-Markup European Optical Catalogues
Historically, university labs and aerospace startups located in London's West End and connected research corridors relied on legacy European optical distributors. These intermediaries typically mark up standardized fused silica windows by 300% to 500% while offering inflexible catalog dimensions. By partnering directly with our Donghai factory—the global epicenter of raw quartz refinement—engineering teams acquire custom dimensions (Ø5 mm micro-windows up to Ø600 mm viewports) at raw-manufacturer price levels, completely bypassing catalog markups.
2. Demand for Agile 1-Piece Prototyping Through High-Volume Scaling
Hardware accelerators and venture-backed photonics firms cannot afford the prohibitive 10-to-50 piece Minimum Order Quantities (MOQ) demanded by traditional domestic fabricators. Zelvo Quartz provides an agile 1-Piece Prototype MOQ. This allows research teams to validate optical models, test vacuum seal tolerances, and iterate chamfer angles with negligible upfront capital outlay before scaling directly into 5,000-piece production batches on our automated double-sided polishing production lines.
3. Stringent Optical Metrology & Cleanroom Packaging Compliance
Modern cleanrooms in West End research facilities will reject optics showing particulate contamination or incomplete material certifications. Our direct export supply chain includes 100% spectrophotometer transmission curve traces, Zygo 3D surface topography interferometry reports, and dual-layer vacuum nitrogen cleanroom sealing (Class 1,000 / Class 100 assembly available), ensuring drop-in readiness without requiring secondary ultrasonic cleaning upon receipt.
Why West End Engineers Source From Zelvo Quartz
Headquartered in Donghai County—China's recognized "Crystal Capital"—Lianyungang Zelvo Quartz Products Co., Ltd. marries deep domestic raw material purity with European-grade CNC fabrication tolerances.
Onsite-Verified Purity
Factory verified on-site by international inspection bodies. Every fused silica ingot starts from 99.99% crystalline silica, guaranteeing absolute material integrity with complete trace-element impurity reports.
≤2-Hour Technical Response
Direct sales engineering team reviews CAD, STP, and DXF drawings within 120 minutes during work hours. You converse directly with optical fabrication veterans, not sales dispatchers.
Laser CNC & Flame Polishing
Proprietary high-speed laser cutting, circular wafer coring, ultrasonic pocket milling, and manual hydrogen-oxygen flame lathe craftsmanship under one industrial roof.
Door-to-Door DDP Logistics
Comprehensive shipping support: DDP, DAP, air express door-to-door directly into West End laboratory facilities. Anti-vibration multilayer packaging prevents transit cracking.
The Zelvo 5-Stage Zero-Defect Optical Fabrication Protocol
Frequently Asked Questions: Sourcing Fused Silica Windows for the West End Market
Practical answers addressing lead times, technical certifications, customs compliance, and material selection for West End procurement managers and optical research leads.
How do you compare your JGS1 Synthetic Fused Silica to Corning 7980 or Suprasil 3001?
Can you provide custom anti-reflective (AR) coatings for our window orders?
What is the standard turnaround and delivery time to our facilities in the West End?
How do you guarantee that optical windows won't arrive cracked or chipped?
What inspection reports and quality documentation accompany each shipment?
What is your minimum order quantity for non-standard or irregular shapes?
Accelerate Your Optical Build with Direct Manufacturer Pricing
Upload your engineering drawings or dimensional specifications today. Our senior optical manufacturing engineers provide instant feasibility feedback, tolerance optimization advice, and transparent factory direct pricing within 2 hours.