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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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