Fused silica plano-concave lens, UV-IR Transmissive Fused Silica Optical Lens

Felix Glass plano-concave single lens is manufactured from high-purity synthetic fused silica (fused quartz glass), a high-performance optical substrate with ultra-wide transmission covering deep ultraviolet to near-infrared band. The lens adopts plano-concave single-element structure: one flat plane surface, one concave curved surface, presenting negative focal length optical characteristic, which is specially used for laser beam expansion, beam divergence and chromatic aberration matching optical paths.

 

Ultra-precision CNC grinding and polishing guarantee high surface figure accuracy and ultra-low surface roughness. Fused silica features extremely low thermal expansion coefficient, stable optical performance under high-power UV laser irradiation, and excellent high temperature resistance, no deformation or light absorption drift under continuous industrial laser operation. Custom wavelength-matched AR anti-reflection coating can be deposited on both surfaces to reduce surface reflection loss and improve UV/IR light throughput.

 

- Raw Material: High purity synthetic fused silica (fused quartz glass)

- Lens Structure: Plano-concave single element, flat + concave dual surface

- Working Spectrum: 185nm – 2.1μm deep UV, visible light & near-infrared

- Optical Property: Negative focal length, divergent beam shaping function

- Surface Flatness: ≤ λ/8 ..........8nm high precision standard

- Surface Quality: Standard 60-40 scratch-dig, upgradeable to 40-20 high precision

- Thermal Expansion Coefficient: Ultra-low 0.55×10⁻⁶ /℃, stable under temperature fluctuation

- Coating Option: Custom broadband AR coating optimized for UV / 1064nm / 532nm laser wavelength

- Edge Treatment: Optional black edge coating to suppress stray light interference

 

 

1. Fused silica substrate with ultra-wide UV-IR transmission, uniquely suitable for deep ultraviolet laser systems that ordinary optical glass cannot support

2. Plano-concave negative lens design, professional for laser beam expansion, collimation matching and optical path divergence correction

3. Extremely low thermal expansion & high heat resistance, no thermal deformation under long-time high-power UV laser irradiation

4. Ultra-precision polished surface, consistent focal length batch stability, low stray light interference

5. Customizable aperture, focal length, AR coating spectrum and edge shape to match UV laser, spectral analysis and precision measurement equipment

6. No bubble, no striation high-purity fused silica blank, low internal light absorption, stable long-term optical performance

 

 

- Deep ultraviolet UV laser marking & engraving equipment

- Fiber laser beam expansion optical modules

- Laboratory UV-visible infrared spectrometers

- Precision industrial optical measuring instruments

- Semiconductor wafer inspection optical systems

- Medical UV optical diagnosis assemblies

 

 

We provide full one-stop fused silica optical processing including fused quartz blank cutting, ultra-precision CNC grinding, high-precision surface polishing, wavelength-matched AR coating, black edge treatment, strict UV transmittance testing and surface figure inspection.

Prototype sampling, small-batch trial production and mass manufacturing are supported. Every fused silica plano-concave lens is fully tested to meet customer-specified spectral, dimensional and laser resistance requirements before delivery.

 

It is a negative diverging lens, mainly used to expand laser beam, adjust optical path divergence angle, match optical system focal length; fused silica material supports deep UV laser that ordinary optical glass cannot transmit.

Fused silica can transmit deep ultraviolet light below 300nm, with ultra-low thermal expansion and high temperature resistance, suitable for UV laser and high-temperature optical environments; BK7 glass only transmits 400nm and above visible light.

Yes, we support custom aperture, negative focal length, and AR coating optimized for UV, 532nm green laser or 1064nm infrared laser working wavelength.

It fits UV laser marking machines, fiber laser beam expanders, laboratory spectrometers, semiconductor inspection optical systems and industrial precision measuring instruments.

We supply prototype sampling, small trial batches and large-scale manufacturing, all fused silica lenses pass full spectral transmittance and surface quality inspection before shipment.