65-977 25 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=60mm UV-VIS 345-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 60 mm
- R1
- 36.25 mm
- R2
- -28.67 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
65-977 25 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=60mm UV-VIS 345-700nm
The 65-977 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and a focal length of 60mm, specifically designed for UV-VIS applications within the 345-700nm range. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase through their website.
The lens is constructed from two types of Schott glass, N-FK5 and F2HT, which are carefully selected to minimize chromatic aberration, a common issue in optical systems. The geometry of the lens is meticulously designed, with a central thickness of 6.5mm, an edge thickness of 5.75mm, and inner and outer radii of 0mm. The lens also features a rear radius (r2) of -28.67mm and a third radius (r3) of -76.58mm, enhancing its optical performance.
The 65-977 lens is coated with Edmund Optics' standard UV-VIS coating on both the front and back surfaces, ensuring optimal transmission within the specified UV-VIS range. This coating is part of the lens's "info" parameters, which also include its catalog number and web links for further information and purchasing.
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