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

12mm Dia. x -18mm FL, NIR I Coated, 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 #49-547 In Stock
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Other Coating Options
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£35.27
Qty 1-9
£35.27
Qty 10+
£31.66
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Diameter (mm):
12.00 +0.0/-0.025
Effective Focal Length EFL (mm):
-18.00
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BK7
f/#:
1.5
Numerical Aperture NA:
0.33
Coating:
NIR I (600-1050nm)
Type:
Double-Concave Lens
Wavelength Range (nm):
600 - 1050
Back Focal Length BFL (mm):
-18.65
Bevel:
Protective bevel as needed
Center Thickness CT (mm):
2.00
Center Thickness Tolerance (mm):
±0.05
Centering (arcmin):
<1
Clear Aperture CA (mm):
11.00
Coating Specification:
Ravg ≤0.5% @ 600 - 1050nm
Edge Thickness ET (mm):
3.76
Focal Length Specification Wavelength (nm):
587.6
Focal Length Tolerance (%):
±1
Radius R1=-R2 (mm):
-18.94
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.
7 J/cm2 @ 1064nm, 10ns
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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Reach 235:
Compliant
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Product Family Description

TECHSPEC® NIR I 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® NIR I Coated Double-Concave (DCV) Lenses offer optimal performance in the 600nm to 1050nm range.  These lenses are also available Uncoated, VIS-EXT, MgF2, VIS 0°, VIS-NIR, NIR I, or with NIR II AR coating options.