65-974 12.5 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=50mm UV-VIS 345-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- EFL
- 50 mm
- R1
- 29.11 mm
- R2
- -25.27 mm
Material 1
- Name
- N-FK5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4889720412922705
- λ
- 550 nm
- B1
- 0.844309338
- C1
- 0.00475111955 μm2
- B2
- 0.344147824
- C2
- 0.0149814849 μm2
- B3
- 0.910790213
- C3
- 97.8600293 μm2
Material 2
- Name
- F2HT
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6236551229276037
- λ
- 550 nm
- B1
- 1.34533359
- C1
- 0.00997743871 μm2
- B2
- 0.209073176
- C2
- 0.0470450767 μm2
- B3
- 0.937357162
- C3
- 111.886764 μm2
65-974 12.5 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=50mm UV-VIS 345-700nm
The 65-974 is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens boasts a 12.5 mm diameter and an effective focal length (EFL) of 50mm, specifically designed for UV-VIS applications within the wavelength range of 345-700nm.
The lens is constructed from two types of Schott glass, N-FK5 and F2HT, each with its unique refractive indices and dispersion properties. This combination helps to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points.
The lens geometry is meticulously designed, with a central thickness of 3.5mm and edge thickness of 4.55mm. The first and second radii of curvature are R1=29.11mm and R2=-25.27mm, respectively, while the third radius of curvature, R3, is -71.39mm. These parameters contribute to the lens's overall optical performance.
The lens is coated with Edmund Optics' standard UV-VIS coating on both the front and back surfaces. This coating enhances the lens's transmission capabilities within the specified UV-VIS range, further optimizing its performance for its intended application.
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