CaF2 Windows

CaF2 Windows are made from Calcium Fluoride material, which has transparent range from 170-7800nm. The refractive index is 1.399 at 5000nm. It has little hygroscopic susceptibility and high thermal expansion coefficient. CaF2 Windows are relatively soft and somewhat hygroscopic so polishing, coating and handling are more critical than UV Fused Silica windows. Beside UV application, CaF2 also is commonly used in IR components such as windows, Lenses and prisms.

Specifications:
Material: --------------------------------------------------------- Calcium Fluoride single crystal
Diameter Tolerance: ------------------------------------------ +0.0, -0.1mm
Thickness Tolerance: ---------------------------------------- ±0.2mm
Clear Aperture: ------------------------------------------------->80%
Parallelism:------------------------------------------------------- 1 arc minute
Flatness:----------------------------------------------------------- λ/2 @ 632.8 nm
Surface quality: ------------------------------------------------- 80/50 for general and 40/20 for high precision
Protective Bevel:--------------------------------------------------<0.25x45deg
Coating:-------------------------------------------------------------Uncoated

Founded in 1988 in Hefei, JOPTEC is a global leader in R&D and manufacturing of hermetic metal-glass packages for hybrid integrated circuits, high power laser, optical communication, infrared detector and other optoelectronic devices. With the continuous investment in new technologies and facilities, JOPTEC now covers an area of 21,000 square meters and has developed a complete and mature process for the design, manufacturing, testing and quality inspection for hermetic metal-glass packages. Over the past few decades, JOPTEC’s capability, quality consistency and reliability have been recognized by customers worldwide that range from major international companies of high power laser, optical communication, defense and aerospace agencies to medical and research establishments.