Calcium Fluoride(CaF2) Optical Glass Windows, CaF2 Optics

Calcium Fluoride(CaF2) Optical Glass Windows, CaF2 Optics

Calcium fluoride shows good optical and thermo-mechanical properties. It is widely used as optical windows, lenses and prisms in 0.13μm~9.0μm. For its optical isotropy, low absorption and low refractive index. CaF2 has found unique advantages in high power laser and VU laser optics.

Features:Low cost, a wide range of spectrum,low absorption,high damage threshold,low refractive index.

Applications:high power laser optics,excimer laser

Calcium Fluoride has excellent transmission in the UV, they are often used to make windows from below 150 nm and extending throughout the visible range. The material of CaF2 Windows are relatively soft and somewhat hygroscopic, Polished surfaces are stable and will last several years under normal conditions,so polishing and coating during processing are more critical.

Calcium fluoride (CaF2) is an insoluble ionic compound of calcium and fluorine.

Calcium fluoride 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. It is particularly important as an ultraviolet optical material for integrated circuit lithography.

Fluorides are toxic to humans, however CaF2 is considered relatively harmless due to its extreme insolubility

We provide artificially-crystallized calcium fluoride components available in IR grade and UV Grade.

The cost of UV grade is much expensive than IR grade.