CaF2 Crystal

18 Dec 2020

Calcium fluoride(CaF₂) is a very important optical functional crystal, which has good optical properties, mechanical properties and chemical stability. It can be used as optical crystal, laser crystal and inorganic scintillation crystal. It has a wide transmittance range (0.125-10 μm), and is widely used as optical medium from vacuum ultraviolet to mid infrared. CaF₂ crystal is an ideal optical material for achromatic lenses because of its special refractive index and relative dispersion. At present, deep UV excimer laser lithography is developing from 193 nm to 121 nm. CaF₂ single crystal has the advantages of good ultraviolet transmittance, high laser damage resistance threshold, low stress birefringence and high refractive index, which makes it the best choice for the research of deep UV excimer laser lithography. In terms of laser applications, laser diode pumped CaF₂ crystals activated by Er³⁺, Tm³⁺, Yb³⁺ and other 3-valent rare earth ions were obtained at room temperature.

Parameter

Material and Specifications

Physical and Chemical Properties

Optical characteristics

Index of Refraction

Spectrum

Feature

• Excellent transmission from 125nm to 10um
• Good optical properties, mechanical behavior and chemical stability
• Anisotropy, soft and brittle, high coefficient of thermal expansion and easy cleavage
• Special refractive index and relative dispersion value
• Soluble in acids
• Good ultraviolet transmittance, high laser damage resistance threshold, low stress birefringence and high refractive index

Application

• Optical crystal, laser crystal(IR, UV, VUV)
• Optical media and optical material
• Best material for the study of deep UV excimer laser lithography
• Substrate, optical waveguide
• IR analytic, astronomical-und camera lenses and optics for Excimer laser