UV Fused Silica Windows for Deep-UV Applications
Deep-UV Transmission | Low Thermal Expansion | High-Purity Fused Silica
- High UV Transmission: Manufactured from high-purity UV-grade fused silica, these windows support strong transmission into the deep-UV region and are suitable for applications down to approximately 185 nm, depending on material grade and optical specification.
- Thermal Stability: Fused silica has a low coefficient of thermal expansion (CTE), helping reduce thermally induced deformation and supporting stable performance under temperature changes and laser irradiation.
- High Surface Quality: Polished to precision tolerances with low levels of bubbles and inclusions. Surface quality up to 40-20 Scratch-Dig is available for UV laser, imaging, and industrial optical applications.
- OEM & Industrial Supply: UV fused silica windows are available in custom sizes, thicknesses, surface specifications, and coating options for industrial and optical applications.
Technical Specifications
| Technical Parameter | Specification |
|---|---|
| Substrate | UV Grade Fused Silica (JGS1 / Corning 7980 equivalent) |
| Dimensions | Custom (Round, Square, Rectangular, or Stepped Geometries) |
| Dimensional Tolerance | ±0.1mm (Standard) / ±0.02mm (High Precision) |
| Surface Quality | 40-20 (Standard) to 20-10 Scratch-Dig (Laser Grade)(Precision) |
| Surface Flatness | < λ/4 to λ/10 @ 632.8nm |
| Parallelism | < 3 arc minutes (Standard) / < 10 arc seconds (Precision) |
| Transmission Range | 185nm to 2.1µm (Uncoated) |
| Coating | Uncoated, Narrowband UV-AR (e.g., 266nm, 355nm), or Broadband UV-VIS |
| Clear Aperture | > 90% of central dimension |
Product Overview
Built for High-Energy UV Systems
Standard glass absorbs UV light and degrades over time. UV fused silica is well suited for optical systems operating in the ultraviolet spectrum.These windows provide durable optical protection for spectrometer optics, fluorescence microscopy sensors, and UV curing systems, while supporting high signal transmission in demanding UV applications.
Low Thermal Expansion, High Stability
In environments involving high-power lasers or rapid temperature fluctuations, optical components must remain dimensionally stable. The low thermal expansion of UV fused silica helps maintain optical alignment and reduce thermally induced aberrations, supporting stable performance in precision metrology applications.
Reliable OEM & Industrial Supply
We support OEM and industrial customers with custom sizes, thicknesses, surface specifications, and coating options for UV fused silica windows. Components can be supplied for integration into analytical, imaging, laser, and automation systems.
Metrology & Performance Reports
Figure 1: UV Fused Silica Window Transmittance
The BBAR-coated fused silica window shows >99.5% average transmittance across the measured UV-to-NIR range, compared with the uncoated JGS1 reference.
Figure 2: Fused Silica Window Surface Flatness
The interferometric result shows a PV flatness of 0.213λ (better than λ/4), supporting controlled wavefront performance in UV laser and analytical optical systems.
Metrology Analysis & Application Fit
- Target Wavelength: Optimized for Deep-UV (185nm – 300nm) and Near-UV (300nm – 400nm) spectrums, while maintaining excellent visible and near-infrared transmission.
- Performance Index: High-purity fused silica helps reduce internal scattering and absorption, supporting high optical performance and improved resistance to laser-induced damage in demanding applications.
- Mechanical Precision: CNC shaping and edge grinding support precise dimensional control and reliable integration with instrument housings or vacuum flanges.
- Primary Applications: Ideal for UV laser processing, fluorescence spectroscopy, semiconductor wafer inspection, analytical chemistry instrumentation, and medical/biomedical diagnostic equipment.
Custom Sub-Assembly & Engineering Services
Off-the-shelf windows don’t always fit specialized OEM hardware. We specialize in bridging the gap between raw optical components and final instrument assembly. Whether you need custom V-coat Anti-Reflection (AR) coatings tailored to specific Nd:YAG laser harmonics (266nm, 355nm), precision chamfering, or specific surface flatness testing, our technical team is ready to optimize your high-precision systems.