30-120 15 mm Dia. N-F2/N-BK7/N-F2 Hastings Achromatic Triplet; EFL=25.4mm MgF2 400-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 15 mm
- EFL
- 25.4 mm
- R1
- 19 mm
- R2
- 9.3 mm
Material 1
- Name
- N-F2
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6236565068581217
- λ
- 550 nm
- B1
- 1.39757037
- C1
- 0.00995906143 μm2
- B2
- 0.159201403
- C2
- 0.0546931752 μm2
- B3
- 1.2686543
- C3
- 119.248346 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-F2
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6236565068581217
- λ
- 550 nm
- B1
- 1.39757037
- C1
- 0.00995906143 μm2
- B2
- 0.159201403
- C2
- 0.0546931752 μm2
- B3
- 1.2686543
- C3
- 119.248346 μm2
30-120 15 mm Dia. N-F2/N-BK7/N-F2 Hastings Achromatic Triplet; EFL=25.4mm MgF2 400-700nm
The 30-120 is a Hastings Achromatic Triplet lens with a 15 mm diameter and a effective focal length (EFL) of 25.4mm. This lens is sourced from Edmund Optics and is available for purchase on their website. The lens is designed with a multiplet geometry, featuring an inner radius of 0 and an outer radius of 0. The lens's base shape is circular, and it has a thickness edge of 9.41mm.
The lens is composed of three elements made from N-F2 and N-BK7 Schott glass. The first and third elements are made of N-F2, while the second element is made of N-BK7. This configuration helps to correct chromatic aberration, making the lens suitable for use in a wide range of applications.
The lens is coated with Edmund Optics' standard MgF2 coating on both the front and back surfaces. This coating enhances the lens's performance in the 400-700nm spectral range, providing improved transmission and durability.
The lens's geometry includes a center thickness of 1.14mm, a thickness a of 10.21mm, and a thickness b of 1.14mm. The lens's r1 and r2 radii are 19mm and 9.3mm respectively, while the r3 and r4 radii are -9.3mm and -19mm respectively.
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