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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
12.5mm Dia x -20mm FL VIS 0°, Inked, Negative Achromatic Lens

Stock #62-485-INK
S$135.20
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Qty 1-5
S$135.20
Qty 6
S$108.16
Volume Pricing
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Diameter (mm):
12.50 ±0.025
Effective Focal Length EFL (mm):
-20.00
Focal Length Tolerance (%):
±2
Back Focal Length BFL (mm):
-22.88
Focal Length Specification Wavelength (nm):
587.6
Clear Aperture CA (mm):
11.50
Centering (arcmin):
<1
Center Thickness CT 1 (mm):
2.00
Center Thickness CT 2 (mm):
3.50
Center Thickness Tolerance (mm):
±0.2
Radius R1 (mm):
-13.80
Radius R2 (mm):
9.99
Radius R3 (mm):
109.48
Edge Thickness ET (mm):
7.01
Substrate:
Surface Quality:
40-20
f/#:
1.6
Numerical Aperture NA:
0.31
Coating:
VIS 0° (425-675nm)
Coating Specification:
Ravg ≤0.4% @ 425 - 675nm
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4
Bevel:
Protective bevel as needed
Type:
Negative Achromatic Lens
Wavelength Range (nm):
425 - 675

Regulatory Compliance

RoHS:

Product Family Description

TECHSPEC® Broadband AR Coated Negative Achromatic Lenses are corrected for color and on-axis aberrations. These lenses, consisting of two optical elements cemented together, are commonly used as Barlow lenses to extend focal lengths. TECHSPEC® Broadband AR Coated Negative Achromatic Lenses are available in various diameter sizes and VIS 0° or VIS-NIR coating options.

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