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
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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