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Double Concave Lens

Specifications:

Material
BK7 glass, UV grade fused silica, CaF2
Diameter Tolerance
+0.0,-0.1mm
Center Thickness
+/-0.2mm
 
Bevle
<0.25mm
Paraxial Focal Length
+/-1% (EFL<1m)
+/-2%(EFL>1m)
Surface Quality
60-40 scrath and dig
Clear Aperture
Central 85% of diameter
Coating
Uncoated, AR, HR, PR Coating, etc.

Standard Double Concave Lenses (BK7)

Part No. f (mm) dia (mm) R1=R2 (mm) t c (mm) t e (mm) t b (mm)
LDC1101 -25.0 12.7 26.25 2.0 3.6 -25.7
LDC1102 -30.0 12.7 31.44  2.0 3.3 -30.7
LDC1103 -40.0 12.7 41.80  2.0 3.0 -40.7
LDC1104 -50.0 12.7 52.17  2.0 2.8 -50.7
LDC1201 -25.0 25.4 26.25  2.0 8.6 -25.7
LDC1202 -35.0 25.4  36.62  2.0 6.5 -35.7
LDC1203 -50.0 25.4 52.17 2.0 5.1 -50.7
LDC1204 -75.0 25.4 78.09  2.0 4.1 -75.7
LDC1205 -100.0 25.4 104.00  2.0 3.6 -100.7