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IR Analytic 125nm Isometric CaF2 Fluoride Crystal

Categories Optical Crystals
Brand Name: CRYLINK
Model Number: CRYLINK- CaF2 Fluoride Crystal
Certification: Iso9001
Place of Origin: China
MOQ: 1 Pieces
Price: negotiation
Payment Terms: TT
Supply Ability: 10000 pieces /month
Delivery Time: 3-4 weeks
Packaging Details: Carton
Crystal System: Isometric
Refractive Index: 1.432-1.436
Orientation: [100] or [001] < ±0.5°
Surface Quality: 10-5 (MIL-O-13830A
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IR Analytic 125nm Isometric CaF2 Fluoride Crystal

CaF2 Optical Crystal
Description
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.
Features
  • 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

Applications


  • 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

Orientation[100] or [001] < ±0.5°
Orientation Tolerance< 0.5°
Parallelism<20〞
Perpendicularity
Surface Quality10-5 (MIL-O-13830A)
Wavefront Distortion<λ/4@633 nm
Surface Flatness<λ/8 @633 nm
Clear Aperture>90%
Thickness/Diameter Tolerance

±0.05 mm


Crystal SystemIsometric
HabitCubic, massive
Space GroupFm3m
Class (H-M)m3m (4/m 3 2/m) – Hexoctahedral
Lattice Constants5.4626 Å
Z4
StreakWhite
Density3.175…3.56g/cm3
Melting Point1418°C
Thermal Conductivity /(W·m-1·K-1@25°C)9.71@[111]
Heat Capacity/(J ·(kg·K)-1)854
Thermal Expansion /(10-6·K-1@25°C )18.9
Young`s Modulus /GPa75.8
TenacityBrittle
Cleavage QualityPerfect, perfect and easy
Hardness (Mohs)4
FractureConchoidal

Transmission Range0.125 – 10 µm
Refractive Index1.432-1.436
Reflective Loss2.89@4µm
Optical CharacterIsotropic
Surface ReliefModerate
BirefringenceNone
PleochroismAbsent
Dispersion0.007
Poisson Ratio0.29
Dielectric Constant6.76

λ(μm)nλ(μm)nλ(μm)n
0.181.510.321.455.821.39
0.191.500.431.446.201.38
0.211.490.881.436.711.37
0.221.482.671.427.001.36
0.241.473.941.417.531.35
0.271.465.011.408.221.34

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