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20.0mm Dia. x -50 FL, Uncoated, Plano-Concave Lens

Stock #45-024
€25.00
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Qty 1-9
€25.00
Qty 10-24
€22.50
Qty 25+
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Diameter (mm):
20.00 +0.0/-0.025
Effective Focal Length EFL (mm):
-50.00
Back Focal Length BFL (mm):
-52.31
Coating:
Uncoated
Substrate:
N-BK7
Surface Quality:
40-20
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4
Center Thickness CT (mm):
3.50
Center Thickness Tolerance (mm):
±0.1
Focal Length Tolerance (%):
±1
Focal Length Specification Wavelength (nm):
587.6
Centering (arcmin):
<1
Clear Aperture CA (mm):
19.00
Edge Thickness ET (mm):
5.21
Radius R1 (mm):
-25.84
f/#:
2.5
Numerical Aperture NA:
0.20
Bevel:
Protective bevel as needed
Type:
Plano-Concave Lens
Wavelength Range (nm):
350 - 2200
RoHS:

Product Family Description

  • Wavelength Range of 350-2200nm
  • Precision Diameter and Centration Tolerances Allow for Easy OEM Integration
  • Wide Variety of Diameters, Focal Lengths, and Coatings
  • Anti-Reflection Coating Options: MgF2, VIS 0°, VIS-NIR, NIR I, and NIR II

Plano-Concave (PCV) lenses have one flat and one inward curved surface. PCV lenses have a negative focal length and are used for image reduction or to spread light.

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