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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
20mm Diameter x -40 FL, NIR II, Inked, Plano-Concave Lens

Stock #67-997-INK
€48,00
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Cant. 1-9
€48,00
Cant. 10
€43,20
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Diameter (mm):
20.00 ±0.025
Effective Focal Length EFL (mm):
-40.00
Back Focal Length BFL (mm):
-42.31
Coating:
NIR II (750-1550nm)
Coating Specification:
Rabs ≤1.5% @ 750 - 800nm
Rabs ≤1.0% @ 800 - 1550nm
Ravg ≤0.7% @ 750 - 1550nm
Substrate:
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):
±0.10
Focal Length Tolerance (%):
±1.00
Focal Length Specification Wavelength (nm):
587.6
Centering (arcmin):
<1
Clear Aperture CA (mm):
19.00
Edge Thickness ET (mm):
5.39
Radius R1 (mm):
-20.67
f/#:
2.00
Type:
Plano-Concave Lens
Typical Energy Density Limit:
8 J/cm2 @ 1064nm, 10ns
Wavelength Range (nm):
750 - 1550

Regulatory Compliance

Product Family Description

  • AR Coated to Provide <0.7% Reflectance per Surface for 750 - 1550nm
  • Designed for 0° Angle of Incidence
  • Various Coating Options: Uncoated, MgF2, VIS 0°, VIS-NIR, and NIR I

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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