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Calcium Fluoride Double Concave Optical Lens
This Calcium Fluoride Double Concave Lens is made from high-purity CaF₂ crystal, offering superior transmission, low absorption, and excellent thermal stability. It is ideal for optical systems requiring beam divergence and precise light control across UV and IR ranges.
Material :
High-purity Calcium FluorideDesign wavelength :
587.6nmFocal Length Tolerance :
±1%Dimension Tolerance :
+0.0/-0.1mmThickness Tolerance :
±0.1 mmSurface Accuracy :
λ/4@632.8nmSurface Quality :
40-20Centration :
<3'
Product Description
The Calcium Fluoride (CaF₂) Double Concave Lens features a bi-concave design that allows precise beam divergence and expansion, making it a key component in laser systems, infrared imaging, and spectroscopic instruments.With its low refractive index, broad spectral transmission (180 nm–8 μm), and minimal dispersion, this lens ensures superior performance across ultraviolet to infrared wavelengths. CaF₂ material provides excellent resistance to thermal stress and chemical corrosion, maintaining optical stability even under high-power laser or vacuum conditions.Each lens is precisely polished and inspected to a surface quality of 40-20 and an accuracy of λ/10, guaranteeing high optical clarity and minimal light scatter.
Performance Advantages
Broad Spectral Transmission: Covers 180 nm to 8 μm, suitable for UV, VIS, and IR systems.
Low Dispersion & Absorption: Ensures sharp imaging and high signal purity.
Double Concave Design: Enables precise beam divergence and collimation adjustment.
Superior Thermal Stability: Performs reliably under high-power or extreme conditions.
High Surface Accuracy: Minimizes aberration and scattering for enhanced optical efficiency.
Customizable Options: Available in various focal lengths, sizes, and coatings for diverse optical systems.
Application Range
Laser beam divergence and expansion systems
Spectroscopic and analytical instruments
Infrared thermal imaging devices
UV and visible light imaging systems
Optical communication and IR sensors
Scientific and precision optical research setups
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