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Diameter (mm):
20.00 ±0.025
Effective Focal Length EFL (mm):
40.00
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
34.40
Focal Length Specification Wavelength (nm):
587.6
Clear Aperture CA (mm):
19.00
Centering (arcmin):
<1
Center Thickness CT (mm):
10.00 ±0.20
Center Thickness CT 1 (mm):
8.00 ±0.10
Center Thickness CT 2 (mm):
2.00 ±0.10
Radius R1 (mm):
27.63
Radius R2 (mm):
-17.58
Radius R3 (mm):
-171.25
Edge Thickness ET (mm):
7.83
Substrate:
Many glass manufacturers offer the same material characteristics under different trade names. Learn More
TECHSPEC® VIS-NIR Coated Achromatic Lenses consist of two optical components cemented together to form an achromatic doublet. The doublet is computer optimized to correct for on-axis spherical and chromatic aberrations. TECHSPEC® VIS-NIR Coated Achromatic Lenses have visible/near-infrared broadband anti-reflection coating, which is specially optimized to yield maximum transmission (>99%) in the near-infrared. The achromatic lenses reduce reflection to less than 0.25 percent per surface at 880nm. Magnesium Fluoride coated and VIS 0° coated achromats are also available.
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