K9 Double Concave Lens, Optical Lens, Concave Lens

- Nov 13, 2017-

K9 double concave lens

◆   Materials: K9 The essence of annealing 

◆   Focal length: ±2%@587.6nm

◆   Diameter Tolerance: +0.0/-0.20

◆   Center Thickness: ±0.1

◆   Center deviation: 3′

◆   Diaphragm: 1~5

◆   Irregularity: 0.2~0.5

◆   Clearing: IV stand

◆   Coating: MgF2 antireflection film

◆   Aperture: >90%ø


    KSA-412-K9-Double-concave-lens-Optical-lens-Concave-lens-dia-50-8mm-f-250-0mm.jpg

     f'=Focal length  fb=Back focal length  Tc=Thickness of center   Te=Thickness of edge

    Model

    φ

    R

    f' 

    fb 

    Tc 

    Te 

    Weight(g) 

    KSA-401 

    6.0

    10.5

    -9.8

    -10.4

    2.0

    2.9

    1

     KSA-424 

    10.0

    15.951

    -15.1

    -15.8

    2.0

    3.6

    1

     KSA-423 

    10.0

    31.347

    -30.0

    -30.7

    2.0

    2.8

    1

     KSA-402 

    12.7

    19.975

    -19.0

    -19.7

    2.0

    4.2

    1

     KSA-403 

    12.7

    26.592

    -25.4

    -26

    2.0

    3.6

    1

     KSA-404 

    12.7

    39.72

    -38.1

    -38.8

    2.0

    3.0

    1

     KSA-422 

    20.0

    31.48

    -30.0

    -30.8

    2.7

    6.0

    3

     KSA-421 

    20.0

    41.833

    -40.0

    -40.9

    2.7

    5.1

    3

     KSA-420 

    20.0

    62.476

    -60.0

    -61.2

    2.7

    4.3

    3

     KSA-405 

    25.4

    53.022

    -50.8

    -51.8

    3.0

    6.2

    6

     KSA-406 

    25.4

    78.032

    -75.0

    -76.3

    3.0

    5.1

    6

     KSA-407 

    25.4

    103.869

    -100.0

    -101.7

    3.0

    4.6

    6

     KSA-408 

    25.4

    156.126

    -150.0

    -150.9

    3.0

    4.1

    6

     KSA-419 

    30.0

    62.657

    -60.0

    -61.3

    3.5

    7.1

    7

     KSA-418 

    30.0

    186.641

    -180.0

    -181.1

    3.5

    4.7

    7

     KSA-417 

    30.0

    258.993

    -250.0

    -251.3

    3.5

    4.4

    7

     KSA-416 

    40.0

    104.055

    -100.0

    -101.4

    4.0

    7.9

    19

     KSA-415 

    40.0

    155.72

    -150.0

    -151.4

    4.0

    6.6

    18

     KSA-412 

    50.8

    259.248

    -250.0

    -251.5

    5.0

    7.5

    29

     KSA-413 

    50.8

    414.87

    -400.0

    -401.6

    5.0

    6.6

    29

     KSA-414 

    50.8

    517.647

    -500.0

    -501.7

    5.0

    6.3

    29