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All Products / Optics / Optical Lenses / Achromatic Lenses / MgF2 Coated Negative Achromatic Lenses
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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

25mm Dia x -40mm FL Negative Doublet Lens MgF2 Coated

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Stock #62-476 In Stock
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C$166.21
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C$166.21
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C$133.56
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Specifications

General

Type:
Negative Achromatic Lens

Physical & Mechanical Properties

Diameter (mm):
25.00 +0.0/-0.025
Clear Aperture CA (mm):
24.00
Centering (arcmin):
<1
Center Thickness CT (mm):
8.50 ±0.20
Center Thickness CT 1 (mm):
3.00 ±0.10
Center Thickness CT 2 (mm):
5.50 ±0.10
Edge Thickness ET (mm):
11.69
Bevel:
Protective bevel as needed

Optical Properties

Effective Focal Length EFL (mm):
-40.00
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
-44.40
Focal Length Specification Wavelength (nm):
587.6
Radius R1 (mm):
-27.82
Radius R2 (mm):
19.65
Radius R3 (mm):
201.68
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BAF10 / N-SF10
Surface Quality:
40-20
f/#:
1.6
Numerical Aperture NA:
0.31
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
Wavelength Range (nm):
400 - 700

Regulatory Compliance

RoHS 2015:
Compliant
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Reach 219:
Compliant
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Certificate of Conformance:
View
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Product Details

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.

Technical Information

Coating Curves

Custom

Edmund Optics offers comprehensive custom manufacturing services for optical and imaging components tailored to your specific application requirements. Whether in the prototyping phase or preparing for full-scale production, we provide flexible solutions to meet your needs. Our experienced engineers are here to assist—from concept to completion.

Our capabilities include:

  • Custom dimensions, materials, coatings, and more
  • High-precision surface quality and flatness
  • Tight tolerances and complex geometries
  • Scalable production—from prototype to volume

Learn more about our custom manufacturing capabilities or submit an inquiry here.

Compatible Mounts