35-994 9 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=27mm UV-VIS 345-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 9 mm
- EFL
- 27 mm
- R1
- 14.6 mm
- R2
- -12.12 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
35-994 9 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=27mm UV-VIS 345-700nm
The 35-994 is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a 9 mm diameter, is designed for use in the ultraviolet-visible (UV-VIS) spectrum, specifically between 345 and 700 nanometers.
The lens features a focal length of 27mm, making it suitable for a wide range of optical applications. It is constructed from two types of Schott glass, N-FK5 and F2HT, which are renowned for their optical clarity and durability. The lens is coated with Edmund Optics' standard UV-VIS coating on both the front and back surfaces, ensuring optimal performance and longevity.
The lens geometry is carefully designed, with a center thickness of 3.75mm and edge thickness of 4.29mm. The lens curvature is also precisely engineered, with radii of 14.6mm and -12.12mm for the first and second surfaces, respectively, and a third radius of -40.64mm for the air-glass interface. This complex geometry helps to minimize optical aberrations and distortions, ensuring sharp, clear images.
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