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

40mm Dia x -80mm FL Negative Doublet Lens MgF2 Coated

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Stock #63-764 In Stock
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C$241.50
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C$241.50
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C$193.20
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Diameter (mm):
40.00 +0.0/-0.025
Effective Focal Length EFL (mm):
-80.00
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
-84.47
Focal Length Specification Wavelength (nm):
587.6
Clear Aperture CA (mm):
39.00
Centering (arcmin):
<1
Center Thickness CT (mm):
10.50 ±0.20
Center Thickness CT 1 (mm):
4.00 ±0.10
Center Thickness CT 2 (mm):
6.50 ±0.10
Radius R1 (mm):
-47.32
Radius R2 (mm):
40.51
Radius R3 (mm):
128.26
Edge Thickness ET (mm):
16.26
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Quality:
40-20
f/#:
2.00
Numerical Aperture NA:
0.25
Coating:
MgF2 (400-700nm)
Coating Specification:
Ravg ≤1.75% @ 400 - 700nm
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):
400 - 700

Regulatory Compliance

RoHS 2015:
Reach 219:
Certificate of Conformance:

Product Family Description

TECHSPEC® MgF2 Coated Negative Achromatic Lenses consist of two optical elements cemented together. Negative doublet lenses are corrected for color and on-axis aberrations. TECHSPEC MgF2 Coated Negative Achromatic Lenses are used predominantly as Barlow lenses to extend focal lengths. These lenses are often combined with positive achromatic mirror systems and imaging lenses.