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    雙凹透鏡

     

    The Double Concave Lenses present an identical concave surface on both sides of the lens.They have a negative focal length and are useful for 1:1 imaging and in multielement 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 Double Concave Lens

    Design wavelength: 546.1nm Design Index:1.5183 ± 0.0005

    Part No.
    f (mm)
    dia (mm)
    R1=R2 (mm)
    t c (mm)
    t e (mm)
    Fb (mm)
    Illustration
    DCV1201
    -25.0
    12.7
    26.25
    2.0
    3.6
    -25.7
     
    DCV1202
    -30.0
    12.7
    31.44
    2.0
    3.3
    -30.7
    DCV1203
    -40.0
    12.7
    41.80
    2.0
    3.0
    -40.7
    DCV1204
    -50.0
    12.7
    52.17
    2.0
    2.8
    -50.7
    DCV1301
    -25.0
    25.0
    26.25
    2.0
    8.6
    -25.7
    DCV1302
    -35.0
    25.4
    36.62
    2.0
    6.5
    -35.7
    DCV1303
    -50.0
    25.4
    52.17
    2.0
    5.1
    -50.7
    DCV1305
    -75.0
    25.4
    78.09
    2.0
    4.1
    -75.7
    DCV1306
    -100.0
    25.4
    104.00
    2.0
    3.6
    -100.7


    Fused silica Double Concave Lens
    Design wavelength: 546.1nm Design Index:1.46008

    Part No.
    F (mm)
    f(mm)
    R1=R2(mm)
    Tc
    Te
    Fb
    Illustrationc
    BCV2001
    6.0
    15.0
    14.03
    1.5
    2.15
    15.50
     
     
     
     
     
     
     
     
     
     
     
     
     
     
    BCV2002
    6.0
    30.0
    27.84
    1.5
    1.82
    30.51
    BCV2101
    12.7
    15.0
    14.11
    2.0
    5.02
    15.67
    BCV2102
    12.7
    20.0
    18.71
    2.0
    4.22
    20.67
    BCV2103
    12.7
    25.0
    23.32
    2.0
    3.76
    25.68
    BCV2104
    12.7
    30.0
    27.92
    2.0
    3.46
    30.68
    BCV2105
    12.7
    40.0
    37.12
    2.0
    3.09
    40.68
    BCV2201
    25.4
    25.0
    23.32
    2.0
    9.52
    25.68
    BCV2202
    35.4
    35.0
    32.52
    2.0
    7.17
    35.68
    BCV2203
    25.4
    50.0
    46.32
    2.0
    5.55
    50.68
    BCV2204
    25.4
    75.0
    69.33
    2.0
    4.35
    75.69
    BCV2205
    25.4
    100.0
    92.33
    2.0
    3.76
    100.68
    BCV2206
    25.4
    150.0
    138.34
    2.0
    3.17
    150.68
    BCV2207
    25.4
    200.0
    184.35
    2.0
    2.88
    200.69
    BCV2208
    25.4
    250.0
    230.36
    2.0
    2.70
    250.69
    BCV2209
    25.4
    300.0
    276.36
    2.0
    2.58
    300.68
    BCV2210
    25.4
    500.0
    460.40
    2.0
    2.35
    500.69
    BCV2211
    25.4
    1000.0
    920.48
    2.0
    2.18
    1000.69
    BCV2301
    38.0
    50.0
    46.48
    3.0
    11.12
    51.02
    BCV2302
    38.0
    100.0
    92.49
    3.0
    6.95
    101.03
    BCV2303
    38.0
    150.0
    138.50
    3.0
    5.62
    151.03
    BCV2304
    38.0
    200.0
    184.50
    3.0
    4.96
    201.02
    BCV2305
    38.0
    350.0
    322.53
    3.0
    4.13
    351.03
    BCV2306
    38.0
    500.0
    460.55
    3.0
    3.78
    501.02
    BCV2307
    38.0
    750.0
    690.59
    3.0
    3.52
    751.02
    BCV2308
    38.0
    1000.0
    920.64
    3.0
    3.39
    1001.04

     

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


       PDF to download

     
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