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67-422 25 mm Dia. N-LASF45/N-BK7/N-LASF45 Steinheil Achromatic Triplet; EFL=50mm MgF2 400-700nm

67-422 25 mm Dia. N-LASF45/N-BK7/N-LASF45 Steinheil Achromatic Triplet; EFL=50mm MgF2 400-700nm

Type
Lens
Subtype
Multiplets
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
25 mm
EFL
50 mm
R1
31.25 mm
R2
18.47 mm

Material 1

Name
N-LASF45
Dispersion Equation
Sellmeier
n (λ)
1.8059237243831905
λ
550 nm
B1
1.87140198
C1
0.011217192 μm2
B2
0.267777879
C2
0.0505134972 μm2
B3
1.73030008
C3
147.106505 μm2

Material 2

Name
N-BK7
Dispersion Equation
Sellmeier
n (λ)
1.5185223876207927
λ
550 nm
B1
1.03961212
C1
0.00600069867 μm2
B2
0.231792344
C2
0.0200179144 μm2
B3
1.01046945
C3
103.560653 μm2

Material 3

Name
N-LASF45
Dispersion Equation
Sellmeier
n (λ)
1.8059237243831905
λ
550 nm
B1
1.87140198
C1
0.011217192 μm2
B2
0.267777879
C2
0.0505134972 μm2
B3
1.73030008
C3
147.106505 μm2

67-422 25 mm Dia. N-LASF45/N-BK7/N-LASF45 Steinheil Achromatic Triplet; EFL=50mm MgF2 400-700nm

This is a 67-422 Steinheil Achromatic Triplet lens, sourced from Edmund Optics. The lens has a diameter of 25 mm and an effective focal length (EFL) of 50 mm, making it suitable for a wide range of optical applications.

The lens is composed of three elements, specifically N-LASF45 from Schott, N-BK7 from Schott, and another N-LASF45 from Schott. This configuration ensures high-quality imaging and minimal chromatic aberration.

The lens features a standard MgF2 coating on both the front and back surfaces, optimized for the 400-700nm spectrum. This coating enhances the lens's light transmission capabilities and reduces surface reflections, further improving image quality.

The lens geometry includes a thickness edge of 20.58 mm, an inner radius of 0 mm, and an outer radius of 0 mm. The r1 and r2 radii are 31.25 mm and 18.47 mm respectively, while the r3 and r4 radii are -18.47 mm and -31.25 mm respectively. The center thickness is 6.4 mm, with additional thicknesses of 13 mm at center a and 6.4 mm at center b.

This lens is a multiplet, meaning it is a compound lens made up of multiple individual lenses. The multiplet design allows for more complex optical properties and corrections than a single lens, making it a versatile choice for many applications.

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