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    • 氟化鈣平凹透鏡
     
    氟化鈣平凹透鏡

     

    CaF2 Plano concave Lenses are made from CaF2 material. They present a concave surface and a plano surface. They have a negative focal length and are used for image reductinon or to spread light. These lenses diverge collimated incident light and form virtual images which are seen through the lens. They are often used to expand light or to increase focal lengths in existing systems.
    Specifications:
    Material:-----------------------------------------------------------CaF2
    Design Wavelength:----------------------------------------------1500nm,n=1.425
    Diameter Tolerance:----------------------------------------------+0.0/-0.15mm
    Focal Length Tolerance (mm):----------------------------------+/-2%
    Centration:---------------------------------------------------------<3 arc minutes
    Clear Aperture:---------------------------------------------------->85%
    Surface Figure:-----------------------------------------------------<λ/4@633nm
    Surface Quality:-----------------------------------------------------80/50
    Protected Bevel:---------------------------------------------------<0.25mmx45deg
    Coating:--------------------------------------------------------------uncoated

    Part No.
    F(mm)
    f(mm)
    R(mm)
    Tc(mm)
    Te(mm)
    Fb(mm)
    PCV4-201
    25.4
    -50.0
    21.31
    2.0
    6.2
    -51.4
    PCV4-202
    25.4
    -75.0
    31.96
    2.0
    4.6
    -76.4
    PCV4-203
    25.4
    -100.0
    42.63
    2.0
    3.9
    -101.4
    PCV4-204
    25.4
    -150.0
    63.94
    2.0
    3.3
    -151.4
    PCV4-205
    25.4
    -200.0
    85.25
    2.0
    2.95
    -201.4
    PCV4-206
    25.4
    -250.0
    106.56
    2.0
    2.75
    -251.4
    PCV4-207
    25.4
    -300.0
    127.88
    2.0
    2.6
    -301.4
    PCV4-208
    25.4
    -500.0
    213.13
    2.0
    2.4
    -501.4

     

    CaF2 Plano Concave Lens


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