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Double concave lens

Double-Concave  Lenses have two inward curved surfaces and a negative focal length. They are used for image reduction and to spread light..

 

Common specification:


Typical MaterialBK7,Fused Silica  
Typical Dimension(mm) 3~130 
Diameter Tolerance(mm) +0.00/-0.02
Focus Length Tolerance(%)+/-2% 
Centration(arc min)<3
Irregularity (P-V) @ 632.8nm1/4
Power (P-V) @ 632.8nmλ
Surface Quality(scratch/dig)40-20
BevelProtective bevel as needed 
Coating

As request





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