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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

20mm Diameter x -30 FL, VIS 0° Coated, Plano-Concave Lens

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Stock #47-908 Other Coating Options
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$43.50
Qty 1-9
$43.50
Qty 10+
$39.25
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Diameter (mm):
20.00 +0.0/-0.025
Effective Focal Length EFL (mm):
-30.00
Back Focal Length BFL (mm):
-31.96
Coating:
VIS 0° (425-675nm)
Coating Specification:
Ravg ≤0.4% @ 425 - 675nm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
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
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):
-23.54
f/#:
1.5
Numerical Aperture NA:
0.33
Bevel:
Protective bevel as needed
Type:
Plano-Concave Lens
Typical Energy Density Limit:
5 J/cm2 @ 532nm, 10ns
Wavelength Range (nm):
425 - 675
Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification.
5 J/cm2 @ 532nm, 10ns

Regulatory Compliance

RoHS 2015:
Reach 224:
Certificate of Conformance:

Product Family Description

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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