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VUV Region Transmittance 633nm LiF Fluoride Crystal

Categories Optical Crystals
Brand Name: CRYLINK
Model Number: CRYLINK- LiF Fluoride Crystal
Certification: Iso9001
Place of Origin: china
MOQ: 1
Price: negotiation
Payment Terms: T/T
Supply Ability: 10000 pieces /month
Delivery Time: 3-4 weeks
Packaging Details: Carton
Orientation: [100]< ±0.5°
Crystal Structure: Cubic (NaCl)
Density: 2.639 g/cm3
Refractive Index: no = 1.37327@2.5µm, 1.624@0.12 µm
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VUV Region Transmittance 633nm LiF Fluoride Crystal

LiF Optical Crystal


Description

Lithium fluoride (LiF) crystal has excellent VUV region transmittance. It is used for windows, prisms, and lenses in the visible and infrared in 0.104μm-7μm. LiF single crystal is sensitive to thermal shock and would be attacked by atmospheric moisture at 400°C. In addition irradiation produces color centers. Modest precautions should be taken against moisture and high energy radiation damage. Besides LiF softens at 600°C and is slightly plastic that can be bent into radius plates. The material can be cleaved along (100) plane and less commonly (110) plane. The optical characteristics are good and yet the structure is not perfect and cleavage is difficult. For good structure LiF is less commonly grown by the Kyropoulos method (air-grown) specifically for monochromator plates. High quality LiF is usually grown by modified Bridgman method.


Features


  • Tends to create color centers
  • Max temperature for application:400°C
  • Excellent VUV region transmittance
  • Sensitive to thermal shock

Applications


  • X-ray monochromator plates
  • Optical material for VUV applications
  • Windows, prisms, and lenses

Orientation[100]< ±0.5°
Angle 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%
ChamferTechnological for protection from
edge cracks
Thickness/Diameter Tolerance±0.05 mm
Crystal StructureCubic (NaCl)
Lattice Constants4.026
Density2.639 g/cm3
Melting Point870°C
Thermal Conductivity /(W·m-1·K-1@314k)4.01
Specific Heat Capacity/ (J·kg-1·K-1)1562
Thermal Expansion /(10-6·K-1@283k )37
Hardness (Knoop)102-113@600g
Young`s Modulus /(1011dyne cm-2)6.5-7.6
Elastic CoefficientC11=112; C12=46; C44= 63.5
Apparent Elastic Limit/ MPa11.2@1620 psi
Cleavage-100
Transmission Range0.105 … 6 µm
Refractive Indexno = 1.37327@2.5µm, 1.624@0.12 µm
Reflective Loss4.4% @4.0 µm
Poisson Ratio0.326
Absorption Coefficient/cm-`10.74×10-3@2.7µm

Quality VUV Region Transmittance 633nm LiF Fluoride Crystal for sale
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