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  • Bi-Concave Lenses

Description
CAS' TECH CLASS
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Specifications:

Material BK7 or UV fused silica
Focal Length Tolerance ±1% @589nm
Design Wavelength 589nm
Centration ≤3′
Diameter Tolerance +0/-0.1mm
Clear Aperture >central 90%  of  diameter
Center Thickness  Tolerance ±0.1mm
Center Thickness 2.5mm,nominal
Surface Quality 20/10(UVFS)/ 40/20(BK7)
Surface Accuracy

≤ 1.5λ power,λ/2 irregularity(UVFS)

≤ 1.5λ power,λ/4 irregularity(BK7)

Chamfers 0-0.8mm face width×45°±15°


 

Specifications:

 

LBC ---- 063 ---- 068 ---- BK7
     
Product Code   Dia=6.35mm   Radius=-6.851mm   Material

 

Bi-Concave   Lenses:

 

Part Number Dia(mm) EFL(mm)

R(mm)

Te(mm)

Tc(mm)

Material
LBC-063-R068-BK7 6.35 -6.3 -6.851 3.75 2.5 BK7
LBC-063-R133-BK7 6.35 -12.5 -13.333 3.12 2.5 BK7
LBC-127-R133-BK7 12.7 -12.5 -13.333 5.07 2.5 BK7
LBC-127-R262-BK7 12.7 -25 -26.259 3.76 2.5 BK7
LBC-127-R521-BK7 12.7 -50 -52.103 3.13 2.5 BK7
LBC-127-R779-BK7 12.7 -75 -77.943 2.92 2.5 BK7
LBC-127-R1037-BK7 12.7 -100 -103.785 2.82 2.5 BK7
LBC-254-R262-BK7 25.4 -25 -26.259 7.74 2.5 BK7
LBC-254-R521-BK7 25.4 -50 -52.103 5.04 2.5 BK7
LBC-254-R779-BK7 25.4 -75 -77.943 4.19 2.5 BK7
  LBC-254-R1037-BK7    25.4 -100 -103.785 3.76 2.5 BK7
LBC-254-R1554-BK7 25.4 -150   -155.466   3.34 2.5 BK7
LBC-254-R2071-BK7 25.4 -200 -207.148 3.13 2.5 BK7
LBC-508-R779-BK7 50.8 -75 -77.943 9.36 2.5 BK7
LBC-508-R1037-BK7 50.8 -100 -103.785 7.60 2.5 BK7
LBC-508-R1554-BK7 50.8 -150 -155.466 5.88 2.5 BK7
LBC-508-R2071-BK7 50.8 -200 -207.148 5.03 2.5 BK7
LBC-508-R2588-BK7 50.8 -250 -258.824 4.52 2.5 BK7
LBC-508-R5172-BK7 50.8 -500 -517.255 3.51 2.5 BK7

 

 

Part Number Dia(mm) EFL(mm)

R(mm)

Te(mm)

Tc(mm)

Material
LBC-063-R118-UVFS 6.35 -12.5 -11.865 3.20 2.5 UVFS
LBC-127-R232-UVFS 12.7 -25 -23.237 3.92 2.5 UVFS
LBC-254-R462-UVFS 25.4 -50 -46.29 5.37 2.5 UVFS
LBC-254-R692-UVFS 25.4 -75 -69.241 4.40 2.5 UVFS
LBC-254-R921-UVFS 25.4 -100 -92.192 3.92 2.5 UVFS
LBC-254-R1380-UVFS 25.4 -150 -138.092 3.45 2.5 UVFS
LBC-254-R1839-UVFS 25.4 -200 -183.993 3.21 2.5 UVFS
LBC-254-R2298-UVFS 25.4 -250   -229.890   3.07 2.5 UVFS
 LBC-254-R9183-UVFS  25.4 -1000 -918.377 2.64 2.5 UVFS
LBC-508-R921-UVFS 50.8 -100 -92.192 8.26 2.5 UVFS
LBC-508-R1380-UVFS 50.8 -150 -138.092 6.31 2.5 UVFS
LBC-508-R1839-UVFS 50.8 -200 -183.993 5.35 2.5 UVFS
LBC-508-R2298-UVFS 50.8 -250 -229.890 4.78 2.5 UVFS
LBC-508-R4593-UVFS 50.8 -500 -459.380 3.64 2.5 UVFS
LBC-508-R9183-UVFS 50.8 -1000 -918.377 3.07 2.5 UVFS

 

Note:

     Other sizes and focal length are available upon request. Also the lens ring mounts are available upon request.

 

 

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