Direct-from-factory optical grade fused silica plates, customized quartz boat chambers, flow cells, and high-temperature optical reactor consumables.
Optical window procurement has evolved beyond standard transmissive plates. Industrial original equipment manufacturers (OEMs) demand high laser-induced damage thresholds (LIDT), extreme bubble class homogeneity, and multi-spectral UV-NIR throughput.
Procurement teams must balance cost vs. absorption peaks. Synthetic fused silica (formed by SiCl4 vapor axial deposition) eliminates OH-absorption at 2.73 µm and provides transmission down to 185 nm (Deep UV), whereas high-purity natural fused quartz delivers superior bulk thermal creep resistance at service temperatures up to 1,150 °C.
Deep UV Transmittance > 90% @ 193nmLocated in Donghai County, Jiangsu—the premier crystalline quartz distribution and refining cluster—Southeast Quartz aggregates verified high-purity raw ingots, isolating global tier-1 buyers from geopolitical upstream feed-stock shortages while compressing raw blank slicing cycles.
Direct Ingot-to-Window IntegrationMegawatt fiber laser cutting and pulsed Nd:YAG optics demand zero sub-surface damage (SSD). Our chemomechanical polishing (CMP) line and super-smooth chemical etching reduce subsurface micro-fractures, maintaining optical breakdown thresholds over 15 J/cm² at 1064 nm (10 ns pulse).
LIDT > 15 J/cm² @ 1064nm, 10nsQuartz optical windows are vital barrier components that transmit electromagnetic waves while withstanding corrosive chemicals, ultra-high vacuums, or extreme thermal gradients.
In wafer fab plasma etching (CF4, NF3) and deep-UV lithography, our optical viewports resist fluorine radical erosion while offering high wavefront coherence (λ/10 transmitted wavefront distortion) for laser interferometry and optical endpoint detection.
Protective debris windows for 10kW–30kW kilowatt industrial fiber laser processing heads. With absorption coefficients under 5 ppm/cm, our windows eliminate thermal lensing distortions and laser focal shifts during deep metal cutting.
Custom wedge windows, dome viewports, and double-side polished sapphire-bonded quartz optics designed for airborne optical pods, missile guiding heads, and stratospheric IR/UV monitoring systems operating under extreme pressure deltas.
Ultra-pure microchannel flow cells and optical quartz window cells for DNA sequencing, high-performance liquid chromatography (HPLC), and capillary electrophoresis requiring zero auto-fluorescence and sub-micron channel tolerances.
Engineered fused quartz versus synthetic fused silica grades manufactured and tested in accordance with MIL-PRF-13830B and ISO 10110 metrology standards.
| Physical / Optical Parameter | JGS1 (Synthetic Fused Silica) | JGS2 (Optical Fused Quartz) | JGS3 (Infrared Fused Silica) | Testing Standard / Method |
|---|---|---|---|---|
| Primary Transmission Band | 185 nm – 2,500 nm (Deep UV) | 220 nm – 2,500 nm (Standard Optical) | 260 nm – 3,500 nm (Infrared Grade) | PerkinElmer Lambda 1050+ UV/Vis/NIR |
| OH Content (ppm) | < 1,200 ppm (High OH) or < 5 ppm | < 150 – 200 ppm | < 5 ppm (Water-Free) | FTIR Spectroscopy @ 2.73 µm |
| Refractive Index (nd @ 589.3 nm) | 1.45846 | 1.45850 | 1.45840 | V-Block Pulfrich Refractometer |
| Coefficient of Thermal Expansion (CTE) | 5.5 × 10⁻⁷ / °C (20°C - 320°C) | 5.5 × 10⁻⁷ / °C (20°C - 320°C) | 5.5 × 10⁻⁷ / °C (20°C - 320°C) | Dilatometry ISO 7991 |
| Surface Flatness (Wavefront Error) | λ/10 to λ/20 per inch @ 632.8 nm | λ/4 to λ/10 per inch @ 632.8 nm | λ/4 to λ/10 per inch @ 632.8 nm | Zygo Verifire Interferometer |
| Surface Quality (Scratch-Dig) | 10-5 to 20-10 MIL-PRF-13830B | 40-20 to 60-40 | 40-20 to 60-40 | Visual & Laser Scatter Metrology |
| Surface Roughness (Ra) | < 0.2 nm (Super-Polished) | < 0.5 nm (Standard Optical) | < 0.5 nm (Standard Optical) | Atomic Force Microscopy (AFM) |
| Helium Leak Tightness | < 1 × 10⁻¹⁰ Pa·m³/s | < 1 × 10⁻¹⁰ Pa·m³/s | < 1 × 10⁻¹⁰ Pa·m³/s | Pfeiffer Vacuum He Mass Spectrometer |
Over a decade of manufacturing mastery combined with cleanroom metrology ensures every optical window delivers absolute thermal-shock immunity and flawless optical transmission.
Plasma-fused ingots are precisely sliced with multi-wire diamond saws, preserving bulk crystalline structure without stress micro-fractures. CNC 5-axis ultrasonic contouring machines bevel edges and apply custom mounting steps, counterbores, and alignment notches.
Multi-stage planetary lapping ensures parallelism under 3 arcseconds. Our proprietary Chemomechanical Polishing (CMP) utilizing nano-cerium oxide slates achieves super-smooth finishes with sub-nanometer roughness (Ra < 0.2 nm) and scratch-dig 10-5.
Computer-regulated thermal annealing ramps hold fused silica at 1,140 °C followed by slow, stress-gradient cooling (< 1 °C/hr through transition) in nitrogen atmospheres, eliminating residual bulk birefringence and maintaining stress optical coefficients below 2 nm/cm.
Anti-reflective (AR) dielectric coatings customized for specified angles of incidence (AOI 0° to 45°). Coatings cover V-coatings (R < 0.1% at single laser wavelengths 532nm, 1064nm) and broadband BBAR coatings across 250nm–400nm (UV) and 400nm–1100nm (VIS-NIR).
Parts undergo automated ultrasonic multi-tank acid etching (HF/HNO3) followed by 18.2 MΩ·cm DI water cleansing. Vacuum-sealed viewports and CF/KF flanged assemblies are 100% helium mass-spectrometer leak tested before ISO Class 5 cleanroom pouching.
Every shipment is delivered with comprehensive inspection documentation: Zygo interferometric wavefront reports, AFM 3D roughness mappings, spectrophotometric transmission curves, and complete chemical composition certificates (SiO2 >= 99.999%).
Delivering engineering peace-of-mind across the Americas, Europe, Japan, and Southeast Asia through full ISO compliance and export validation.
Operating under strict ISO 9001:2015 quality management procedures with internal traceability from ingot lot numbers to final boxed components. Fully compliant with RoHS Directive 2011/65/EU and REACH (EC 1907/2006) chemical environmental restrictions.
Engineered optics require specialized shipping protocols. Optical windows are wrapped in lint-free lens paper, encased in vacuum sealed antistatic PET blister shells, and packed within shock-absorbing foam reinforced flight crates with integrated tilt and impact indicators.
Our dedicated bilingual application engineering team reviews technical drawings (PDF, DXF, DWG, STEP) within 24 hours. We provide rapid DFM (Design for Manufacturability) guidance to prevent edge chipping, optimize thermal stress relief, and eliminate unnecessary cost drivers.
As semiconductor manufacturing scales past 2nm architectures and ultrafast laser systems deploy into picosecond regimes, quartz optical window technology is breaking physical boundaries.
For high-precision space telescopes and EUV lithography mask blanks, near-zero CTE (< 0 ± 30 ppb/°C from 5°C to 35°C) prevents beam drift caused by photon absorption, setting new precision benchmarks for next-generation optical projection assemblies.
Transitioning beyond mechanical abrasive slurries, Southeast Quartz is integrating ion-beam milling and atmospheric plasma polishing to target atomic-level flatness and roughness below 0.1 nm, preventing scatter losses in quantum optics and gravitational wave metrology.
Eliminating unreliable epoxy and elastomer O-ring seals, our high-temperature diffusion brazing technology bonds quartz optical windows directly to Kovar, Invar, and 316L stainless flanges for true ultra-high vacuum (UHV) bakeout durability up to 450 °C.
Key engineering considerations when selecting, designing, and procuring custom quartz optical windows.
Explore our full line of CNC machined fused quartz tubes, high-purity rods, rings, and customer drawing-based precision quartzware.
