CaF2 Window Calcium fluoride windows
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Calcium Fluoride: Calcium Fluoride (CaF2) exhibits good transmission properties from ~ 140nm Vacuum UV (VUV) to ~ 8.0um in the Infrared. CaF2 is a relatively soft crystalline material and care should be taken as CaF2 is sensitive to mechanical and thermal shock. CaF2 is a cubic single crystal optical material.
Calcium fluoride windows is made from Custom-made CaF2. Fluorides are usually toxic to humans, however CaF2 is considered relatively harmless due to its extreme insolubility. The material is commonly used as a window material for both infrared and ultraviolet wavelengths, since it is transparent in these regions (about 0.15 μm to 9 μm) and exhibits extremely weak birefringence. The birefringence of calcium fluoride exceeds tolerable limits. This problem with birefringence can be mitigated through optimised growth process. It is particularly important as an ultraviolet optical material for integrated circuit lithography.
Calcium fluoride windows Specifications:
| Dimension Tolerance: | +0.0/-0.2mm |
| Thickness Tolerance: | ±0.2mm（General),±0.05(High Precision) |
| Surface Quality: | 80/50（General),40/20(High Precision) |
| Clear Aperture: | ＞90% |
| Flatness: | λ/2@633nm（General),λ/10@633nm Precision) |
| Parallelism: | |
| AR Coated: | Uncoated, AR, HR, PR, etc. |
Calcium fluoride windows Typical Sizes:
| Round Shape:Diameter(mm): | Φ5.0；Φ10.0 ；Φ12.7；Φ15.0；Φ20.0； Φ25.4；Φ30.0；Φ38.1；Φ50.8；Φ76.2 |
| Square Shape:WxH(mm) | 5.0×5.0；10.0×10.0 ；15.0×15.0 ； 20.0×20.0；25.0×25.0；50.0×50.0 |
| Thickness Tolerance: | 0.5；1.0；1.5；2.0；3.0；4.0； 5.0；6.0；8.0；10.0; 50.0 |
High quality Calcium fluoride windows , CaF2 Window
An Optical Window is an optically flat. These regular windows are applied to isolate different physical environments while allowing light pass. When selecting windows,please consider materials, transmission, scattering, parallelism and resistance to certain environment. It can be widely used on laser technology, IR detector and imaging technology etc.
Note for Calcium fluoride windows:
(1). Custom-made Calcium fluoride windows at any size are available.
Besides round, Calcium fluoride windows at shape of quadrate, triangular, or other polygonal are available.
(2). Typical thickness is 2mm, 3mm, 4mm, other thickness from 1.0mm to 20.0 mm is available.
(3). Better bevel is available upon request.
(4). Calcium fluoride windows with Anti-Reflective(AR), High-Reflective(HR), Partial-Reflective(PR) coating are available.