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    • 平凹透鏡
     
    平凹透鏡

     

    Plano-concave Lenses 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:----------------------------------------------N-BK7, Fused Silica, N-SF10, Silicon, Ge,CaF2, etc.
    Diameter Tolerance:----------------------------+0.0/-0.15mm
    Focal Length Tolerance (mm):---------------+/-2%
    Centration:-----------------------------------------<3 arc minutes
    Clear Aperture:------------------------------------>85%
    Surface Figure (per 25mm@632.8nm)----<1.5λ
    IRR ( @632.8nm)---------------------------------<λ/4
    Surface Quality:------------------------------------60/40
    Protected Bevel:-----------------------------------<0.25mmx45deg
    Coating:---------------------------------------------uncoated, AR, HR, PR Coating, etc.

    N-BK7 Plano Concave Lens

    Design wavelength: 546.1nm Design Index:1.5183 ± 0.0005

    Part No.
    f (mm)
    dia (mm)
    R1 (mm)
    tc (mm)
    te (mm)
    fb (mm)
    Illustration
    PCV1201
    -15.0
    12.7
    7.78
    2.0
    5.3
    -16.3
     
    PCV1202
    -20.0
    12.7
    10.37
    2.0
    4.1
    -21.3
    PCV1203
    -25.0
    12.7
    12.96
    2.0
    3.7
    -26.3
    PCV1204
    -30.0
    12.7
    15.55
    2.0
    3.4
    -31.3
    PCV1205
    -40.0
    12.7
    20.73
    2.0
    3.0
    -41.3
    PCV1206
    -50.0
    12.7
    25.92
    2.0
    2.8
    -51.3
    PCV1301
    -25.0
    25.4
    12.97
    2.0
    10.9
    -26.3
    PCV1302
    -35.0
    25.4
    18.14
    2.0
    7.2
    -36.3
    PCV1303
    -50.0
    25.4
    25.92
    2.0
    5.3
    -51.3
    PCV1305
    -75.0
    25.4
    38.87
    2.0
    4.1
    -76.3
    PCV1306
    -100.0
    25.4
    51.83
    2.0
    3.6
    -101.3
    PCV1307
    -150.0
    25.4
    77.75
    2.0
    3.0
    -151.3
    PCV1308
    -200.0
    25.4
    103.66
    2.0
    2.7
    -201.3

    Plano Concave Lens - Fused Silica

    Design wavelength: 546.1nm Design Index:1.46008

    Part No.
    F(mm)
    f(mm)
    R(mm)
    Tc
    Te
    Fb
    Illustration
    PCV2101
    12.7
    -15.0
    6.92
    2.0
    6.17
    -16.41
    PCV2102
    12.7
    -20.0
    9.20
    2.0
    4.54
    -21.38
    PCV2103
    12.7
    -25.0
    11.51
    2.0
    3.91
    -26.38
    PCV2104
    12.7
    -30.0
    13.80
    2.0
    3.55
    -31.37
    PCV2105
    12.7
    -40.0
    18.41
    2.0
    3.13
    -41.38
    PCV2201
    25.4
    -35.0
    16.11
    2.0
    8.20
    -36.36
    PCV2202
    25.4
    -50.0
    23.01
    2.0
    5.82
    -51.38
    PCV2203
    25.4
    -75.0
    34.51
    2.0
    4.42
    -76.38
    PCV2204
    25.4
    -100.0
    46.03
    2.0
    3.79
    -101.42
    PCV2205
    25.4
    -150.0
    69.02
    2.0
    3.18
    -151.39
    PCV2206
    25.4
    -175.0
    80.54
    2.0
    3.01
    -176.43
    PCV2207
    25.4
    -200.0
    92.04
    2.0
    2.88
    -201.42
    PCV2208
    25.4
    -250.0
    115.08
    2.0
    2.70
    -251.50
    PCV2209
    25.4
    -300.0
    138.04
    2.0
    2.59
    -301.41
    PCV2210
    25.4
    -500.0
    230.10
    2.0
    2.35
    -501.50
    PCV2211
    25.4
    -1000.0
    460.10
    2.0
    2.18
    -1001.42
    PCV2401
    38.0
    -50.0
    23.01
    3.0
    13.03
    -52.07
    PCV2402
    38.0
    -100.0
    46.03
    3.0
    7.10
    -102.10
    PCV2403
    38.0
    -150.0
    69.02
    3.0
    5.67
    -152.07
    PCV2404
    38.0
    -200.0
    92.04
    3.0
    4.98
    -202.11
    PCV2405
    38.0
    -350.0
    161.06
    3.0
    4.13
    -352.13
    PCV2406
    38.0
    -500.0
    230.10
    3.0
    3.79
    -502.19

     

    Note: Other sizes, material are available upon request.
    The ones with Silicon, Ge,CaF2 material pls kindly refer to IR OPTICS section.


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