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All Products / Optics / Optical Lenses / Double-Concave (DCV) Lenses / VIS 0° Coated Double-Concave (DCV) Lenses
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

20mm Dia. x -20mm FL, VIS 0°, Inked, Double-Concave Lens

Any of our lenses with a diameter of 5mm or greater can be specified with blackened edges. To specify the blackening, simply append a –INK to the BBAR coated stock number.
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Stock #47-916-INK Contact Us
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Other Coating Options
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Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
S$76.85
Qty 1-9
S$76.85
Qty 10+
S$69.24
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Diameter (mm):
20.00 ±0.025
Effective Focal Length EFL (mm):
-20.00
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-SF11
f/#:
1.00
Numerical Aperture NA:
0.50
Coating:
VIS 0° (425-675nm)
Type:
Double-Concave Lens
Wavelength Range (nm):
425 - 675
Back Focal Length BFL (mm):
-20.55
Bevel:
Protective bevel as needed
Center Thickness CT (mm):
2.00
Center Thickness Tolerance (mm):
±0.10
Centering (arcmin):
<1
Clear Aperture CA (mm):
19.00
Coating Specification:
Ravg ≤0.4% @ 425 - 675nm
Edge Thickness ET (mm):
5.03
Focal Length Specification Wavelength (nm):
587.6
Focal Length Tolerance (%):
±1
Radius R1=-R2 (mm):
-31.82
Surface Quality:
40-20
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
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4

Regulatory Compliance

RoHS:
Compliant
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Certificate of Conformance:
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Product Family Description

TECHSPEC® VIS 0°  Coated Double-Concave (DCV) Lenses are designed to have two inward curved surfaces and a negative focal length similar to Plano-Concave (PCV) lenses. These lenses can be used for balancing aberrations created by other lenses within a system due to their negative spherical aberration. Double-Concave (DCV) lenses are commonly used in a variety of applications including image reduction, beam expansion and telescopes TECHSPEC® VIS 0° Coated Double-Concave (DCV) Lenses are best used in 0° angle of incidence situations and provide optimized transmission in the 425nm – 675nm range. These lenses are also available Uncoated, VIS-EXT, MgF2, VIS-NIR, NIR I, or with NIR II AR coating options.