Product description

Calcium fluoride (CaF2) is an insoluble ionic compound of calcium and fluorine. It 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. Furthermore the material is fairly inert chemically so that these windows are 

not attacked. Nevertheless, at wavelengths as low as 157 nm, which are interesting to semiconductor manufacturers, 

the birefringence of calcium fluoride exceeds tolerable limits. This problem with birefringence can be mitigated through 

optimised growth process.

Note for CaF₂ Window:

(1). Please specify IR or UV when ordering.

(2).Custom-made CaF2 windows at any size are available. Besides round, CaF2 windows at shape of quadrate, triangular, 

or other polygonal are available. JX-Optics can provide dia. 150mm max.

(3).Typical thickness is 1mm 2mm, 3mm, 4mm, other thickness from 1.0mm to 20.0 mm is available.

(4).Better bevel is available upon request.

(5).CaF2 Windows with Anti-Reflective(AR). 

Specification

Material: Calcium Fluoride single crystal ( UV or IR)

Bevel: <0.25mm X 45°

Coating: Optional 

Typical Sizes:

Round Shape: Φ5.0; Φ10.0 ; Φ12.7; Φ15.0; Φ20.0;            Diameter(mm): Φ25.4; Φ30.0; Φ38.1; Φ50.8; Φ76.2

Square Shape: 5.0x5.0 ; 10.0x10.0 ; 15.0x15.0 ;                 WxH(mm): 20.0x20.0; 25.0x25.0; 50.0x50.0

Thickness(mm): 0.5; 1.0; 1.5; 2.0; 3.0;        4.0; 5.0; 6.0; 8.0; 10.