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5
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  • 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
Edge Thickness 3.5 mm , 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°


 

Order Information:

 

LMS ---- 254 ---- R515 ---- R1000 ---- BK7
       
Product Code   Diameter=25.4mm   R1=51.56mm   R2=-100mm   Material

 

Meniscus  Lenses

 

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

R1(mm)

R2(mm)

EFL(mm)

Material
LMS-254-R515-R1000-BK7 25.4 4.28 3.5 51.56 -100 200 BK7
LMS-254-R857-R2500-BK7 25.4 4.12 3.5 85.7 -250 250 BK7
LMS-254-R1025-R3000-BK7 25.4 4.02 3.5 102.58 -300 300 BK7
LMS-254-R1266-R3220-BK7 25.4 3.89 3.5 126.66 -322 400 BK7
LMS-254-R1554-R3876-BK7 25.4 3.81 3.5 155.466 -387.6 500 BK7

 

Note:

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

 

 

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