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

20mm Dia. x 30mm FL, NIR I Coated, Double-Convex 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 #49-487 3-5 days
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Other Coating Options
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S$64.50
Qty 1-9
S$64.50
Qty 10+
S$57.38
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Diameter (mm):
20.00 +0.0/-0.025
Back Focal Length BFL (mm):
28.20
Effective Focal Length EFL (mm):
30.00
Coating:
NIR I (600-1050nm)
Coating Specification:
Ravg ≤0.5% @ 600 - 1050nm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BK7
Surface Quality:
40-20
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4
Centering (arcmin):
<1
Bevel:
Protective bevel as needed
Center Thickness CT (mm):
5.30
Center Thickness Tolerance (mm):
±0.10
Edge Thickness ET (mm):
1.88
Radius R1=-R2 (mm):
30.08
Clear Aperture CA (mm):
19.00
f/#:
1.5
Focal Length Specification Wavelength (nm):
587.6
Numerical Aperture NA:
0.33
Type:
Double-Convex Lens
Wavelength Range (nm):
600 - 1050
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

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-Convex (DCX) Lenses, also referred to as bi-convex lenses, have two positive, symmetrical faces with equal radii on both sides. These lenses are generally recommended for finite imaging applications with a conjugate ratio (ratio between object distance and image distance) between 0.2 and 5. At a conjugate ratio of 1, aberrations such as spherical aberration, chromatic aberration, coma, and distortion are minimized or cancelled due to the symmetric lens design. TECHSPEC NIR I Coated Double-Convex Lenses are available in a variety of substrates and coating options for the visible and NIR spectra.