65-980 25 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=125mm UV-VIS 345-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 125 mm
- R1
- 72.95 mm
- R2
- -64.21 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
65-980 25 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=125mm UV-VIS 345-700nm
The 65-980 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and a focal length of 125mm, specifically designed for UV-VIS applications within the wavelength range of 345-700nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for immediate use.
The lens is constructed from two types of Schott glass, N-FK5 and F2HT, which are renowned for their excellent optical properties. The N-FK5 glass is used for the first element, while the F2HT glass is used for the second element. This combination helps to minimize chromatic aberration, ensuring sharp and clear images.
The lens features a standard UV-VIS coating on both the front and back surfaces, which is Edmund Optics' standard curve. This coating enhances the lens's transmission and reduces reflection, further improving image quality.
The geometry of the lens is carefully designed to optimize its performance. The edge thickness is 5.99mm, while the center thickness is 5mm. The lens also features a central thickness 'a' of 2.5mm, which can be useful in certain applications. The inner and outer radii are 0mm, indicating a symmetrical design.
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