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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

12.5 x 25mm EFL Steinheil Triplet Achromatic Lens

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Stock #47-675 In Stock
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£109.44
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£109.44
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£87.55
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Specifications

General

Type:
Achromatic Triplet Lens

Physical & Mechanical Properties

Diameter (mm):
12.50 +0.0/-0.025
Centering (arcmin):
<3
Center Thickness CT (mm):
18.00
Center Thickness A (mm):
10.00
Center Thickness B (mm):
4.00
Radius R4 (mm):
-15.65
Edge Thickness ET (mm):
15.39
Bevel:
Protective bevel as needed

Optical Properties

Effective Focal Length EFL (mm):
25.00
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
17.82
Focal Length Specification Wavelength (nm):
587.6
Radius R1 (mm):
15.65
Radius R2 (mm):
8.22
Radius R3 (mm):
-8.22
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
Wavelength Range (nm):
400 - 700

Regulatory Compliance

RoHS 2015:
Reach 219:
Certificate of Conformance:

Product Details

TECHSPEC® Steinheil Triplet Achromatic Lenses are designed for 1:1 conjugate ratios and utilize symmetry to correct for aberrations. Steinheils are made from a low index center element cemented between two identical high index outer elements. Each lens is edged down to f-numbers with reasonable aberration correction at increased fields. TECHSPEC® Steinheil Triplet Achromatic Lenses feature small diameters that allow for mounting in smaller spaces compared to traditional Steinheil lens designs. Steinheil Triplets are ideal for use in relay systems.

Technical Information

Coating Curves

  • MgF₂ (400-700nm)
Only 2 different Y Axises can be displayed at one time.

Please note that coating performance outside each product’s specified design range is theoretical and may vary.

Related Products

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.

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