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Negative Meniscus Lenses

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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
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°

 

 

Order Information:

 

LNS ---- 254 ---- R950 ---- R459 ---- BK7
       
Product Code   Diameter=25.4mm   R1=95mm   R2=-45.9mm   Material

 

BK7 Meniscus  Lenses:

 

Part Number Dia(mm) Tc(mm) Te(mm)

R1(mm)

R2(mm)

EFL(mm)

Material
LNS-254-R950-R459-BK7 25.4 2.86 3.8 95.0 -45.9 -175.0 BK7
LNS-254-R1000-R431-BK7 25.4 3.73 4.77 100 -43.11 -150.0 BK7
LNS-254-R900-R373-BK7 25.4 2.02 3.3 100 -38.973 -125.0 BK7
LNS-254-R900-R326-BK7 25.4 2.32 3.92 100 -33.8 -100 BK7

 

Note:

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

 

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