BK7 CaF2 Znse Optical Window Lens for UV and IR Optical Systems
Brand Name:LONGWAY
Certification:ISO9001
Model Number:LW0193262
Minimum Order Quantity:100 pieces
Payment Terms:D/P,T/T,Western Union
Place of Origin:Shanghai, China
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Shanghai Shanghai China
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Rm. 2111, Bldg. A, Tomson Center, No. 188, Zhangyang Rd., Shanghai, China
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BK7 CaF2 Znse Optical Window Lens for UV and IR Optical Systems
1. Material Composition & Core Function:
Hybrid Material Solution: Combines three distinct optical materials (BK7 glass, Calcium Fluoride crystal, Zinc Selenide) into a single protective window/lens element.
Primary Function: Acts as a robust environmental barrier and broadband transmitter for optical systems operating across ultraviolet (UV), visible (VIS), and infrared (IR) spectra.
2. Key Material Properties & Spectral Strengths:
BK7 Glass (Borosilicate):
Transmission: Excellent in Visible (VIS) spectrum.
Properties: High mechanical durability, good chemical resistance, cost-effective. Provides structural integrity.
CaF2 (Calcium Fluoride):
Transmission: Exceptional deep UV transmission (down to ~190nm), good in VIS and Near-IR (NIR). Resists radiation darkening.
Properties: Low refractive index dispersion, low thermal expansion, high laser damage threshold. Relatively soft.
ZnSe (Zinc Selenide):
Transmission: Outstanding broadband transmission from NIR through Far-IR/LWIR (up to ~20µm).
Properties: Essential for thermal IR & CO₂ lasers (10.6µm), good thermal shock resistance. Moderately soft, sensitive to moisture/abrasion (often requires coatings).
3. Combined Critical Properties:
Ultra-Broadband Transmission: Seamlessly covers UV (via CaF2), VIS (via BK7/CaF2), and IR (via ZnSe/CaF2) wavelengths in one component.
Robust Environmental Barrier: Protects sensitive internal optics (sensors, lasers, detectors) from dust, moisture, contaminants, and physical damage.
Optical Integrity: Maintains low wavefront distortion for accurate light transmission.
Durability: Leverages BK7's hardness while benefiting from CaF2/ZnSe's thermal and laser handling capabilities.
4. Primary Function:
To transmit light efficiently across the UV-VIS-IR spectrum while hermetically sealing and safeguarding the internal components of sophisticated optical instruments operating in these demanding wavelength ranges.
5. Key Applications (UV & IR Systems):
Multispectral & Hyperspectral Imaging Systems: Covering UV-VIS-NIR-SWIR-MWIR-LWIR ranges.
High-Power Laser Systems: Protective windows for UV excimer lasers, frequency-multiplied Nd:YAG lasers, and especially CO₂ lasers (10.6µm) where ZnSe excels.
Thermal Imaging (IR Cameras): Windows for SWIR, MWIR, and LWIR cameras (e.g., FLIR systems).
Broadband Spectroscopy: FTIR, UV-VIS-NIR spectrometers requiring wide spectral access.
Defense & Aerospace: Domes and windows for missile seekers, surveillance systems, targeting pods.
Scientific & Research Instruments: Equipment requiring performance across extreme UV and IR wavelengths.
| Item | Optical Window, Glass disc, Sight glass |
| Material | Optical glass, Qurartz glass, Pyrex, borosilicate glass, Float glass, borofloat |
| Diameter Tolerance | +0/-0.2 mm |
| Thickness Tolerance | +/-0.2 mm |
| Processed | By Cutting,Grinding,Tempering, Polishing |
| Working temperature | Resisting high temperature shock |
| Surface Quality | 80/50,60/40,40/20 |
| Material Quality | No scratches and air bubble |
| Transmission | >92% for visible light |
| Chamfer | 0.1-0.3 mm x 45 degree |
| Surface Coating | Available |
| Usage | Laser System, Lighting system, industrial area. |
BK7 CaF2 Znse Optical Window Lens for UV and IR Optical Systems
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