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See all 6 Products in Family

15mm Dia x 25.4mm EFL Hastings Triplet Achromatic Lens

Diameter (mm):
15.00 +0.0/-0.025
Effective Focal Length EFL (mm):
25.40
Focal Length Tolerance (%):
±2
Back Focal Length BFL (mm):
20.00
Focal Length Specification Wavelength (nm):
587.6
Centering (arcmin):
<3
Center Thickness CT (mm):
12.49
Center Thickness A (mm):
10.21
Center Thickness B (mm):
1.14
Center Thickness Tolerance (mm):
±0.3
Radius R1 (mm):
19.00
Radius R2 (mm):
9.30
Radius R3 (mm):
-9.30
Radius R4 (mm):
-19.00
Edge Thickness ET (mm):
9.41
Substrate:
N-F2 / N-BK7 / N-F2
Surface Quality:
40-20
f/#:
1.69
Numerical Aperture NA:
0.30
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:
Achromatic Triplet Lens
Wavelength Range (nm):
400 - 700
RoHS:

Product Family Description

  • Unique, 3-Element Design
  • MgF2 Coated
  • Steinheil Triplet Achromatic Lenses also Available

TECHSPEC® Hastings Triplet Achromatic Lenses feature a unique, three-element design that provides for distortion free, color-correct viewing. These lenses are computer designed to interact with each other, contributing to the reduction or elimination of “pincushion” distortion and chromatic and spherical aberrations. TECHSPEC® Hastings Triplet Achromatic Lenses are composed of two concave meniscus elements cemented to a double-convex lens.

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