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

20mm Dia. x 50mm FL, VIS-EXT, Inked, Double-Convex Lens

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Stock #89-172-INK
Qty 1-9
S$82.15
Qty 10+
S$74.01
Volume Pricing
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Diameter (mm):
20.00 +0.000/-0.025
Back Focal Length BFL (mm):
48.84
Effective Focal Length EFL (mm):
50.00
Coating:
VIS-EXT (350-700nm)
Coating Specification:
Ravg <0.5% @ 350 - 700nm
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
Centering (arcmin):
<1
Bevel:
Protective bevel as needed
Center Thickness CT (mm):
3.50
Center Thickness Tolerance (mm):
±0.10
Edge Thickness ET (mm):
1.52
Radius R1=-R2 (mm):
51.08
Clear Aperture CA (mm):
19.00
f/#:
2.5
Focal Length Specification Wavelength (nm):
587.6
Focal Length Tolerance (%):
±1
Numerical Aperture NA:
0.20
Type:
Double-Convex Lens
Wavelength Range (nm):
350 - 700

Regulatory Compliance

RoHS:

Product Family Description

TECHSPEC® VIS-EXT 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 VIS-EXT Coated Double-Convex Lenses are available in a variety of substrates and coating options for the visible and NIR spectra.

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