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20mm Dia. x -20mm FL, Commercial Grade, Double-Concave Lens

Stock #27-795 Clearance
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$18.70
Qty 1-5
$18.70
Qty 6
$14.95
Volume Pricing
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Diameter (mm):
20.00 +0.00/-0.10
Effective Focal Length EFL (mm):
-20.00
Back Focal Length BFL (mm):
-20.89
Coating:
MgF2 (400-700nm)
Coating Specification:
Ravg ≤1.75% @ 400 - 700nm
Substrate:
N-SK18
Clear Aperture CA (mm):
19.00
Center Thickness CT (mm):
3.00
Center Thickness Tolerance (mm):
±0.10
Centering (arcmin):
6.00
Edge Thickness ET (mm):
6.62
f/#:
1.00
Focal Length Specification Wavelength (nm):
587.6
Focal Length Tolerance (%):
±1
Numerical Aperture NA:
0.5
Radius R1 (mm):
26.11
Type:
Double-Concave Lens
Wavelength Range (μm):
0.4 - 0.7

Regulatory Compliance

RoHS:

Product Family Description

Double-concave (DCV) lenses have two inward, equally curved surfaces and a negative focal length. They are used for image reduction and to spread light. MgF2 anti-reflection coating offers improved transmission in the visible spectrum. Commercial Grade MgF2 Coated Double-Concave (DCV) Lenses offer commercial quality, at an affordable price.

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