65-979 25 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=100mm UV-VIS 345-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 100 mm
- R1
- 58.81 mm
- R2
- -50.72 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
65-979 25 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=100mm UV-VIS 345-700nm
The 65-979 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and an effective focal length (EFL) of 100mm. This lens is designed for use in the ultraviolet-visible (UV-VIS) spectrum, specifically between 345-700nm, making it suitable for a wide range of optical applications.
The lens is composed of two elements, made from N-FK5 and F2HT Schott glass, respectively. These materials are carefully selected to minimize chromatic aberration, ensuring sharp and clear images. The lens has a center thickness of 5mm, with a 2.5mm thickness at the edge, and a 5.6mm thickness at the edge of the first element.
The 65-979 lens features a standard UV-VIS coating on both the front and back surfaces, which is provided by Edmund Optics. This coating is designed to enhance the lens's performance in the UV-VIS range, improving transmission and reducing reflection.
The lens is circular in shape, with a geometry that includes a 58.81mm radius of curvature for the first surface, a -50.72mm radius for the second surface, and a -141.71mm radius for the third surface. The lens is a multiplet, meaning it is composed of multiple elements, and it is available from Edmund Optics.
