35-997 50 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=200mm UV-VIS 345-700nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- 200 mm
- R1
- 105.89 mm
- R2
- -92.87 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
35-997 50 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=200mm UV-VIS 345-700nm
The 35-997 is a high-quality Achromatic Doublet lens, boasting a 50 mm diameter and an effective focal length (EFL) of 200mm. This lens is designed for use in the UV-VIS spectrum, specifically between 345-700nm, making it suitable for a wide range of applications.
The lens is composed of two elements, N-FK5 and F2HT, both from Schott, a renowned manufacturer known for its high-quality optical materials. The N-FK5 element is a borosilicate glass with a low dispersion number, making it an excellent choice for achromatic designs. The F2HT element, also from Schott, is a high-transmission crown glass, ideal for use in the UV-VIS spectrum.
The lens features a standard coating on both the front and back surfaces. This coating, Edmund Optics UV-VIS std curve, is designed to enhance the lens's performance in the UV-VIS spectrum, reducing unwanted reflections and improving transmission.
The lens's geometry is carefully designed to provide optimal performance. The diameter is 50mm, and the edge thickness is 10.57mm. The lens's inner and outer radii are 0mm, and the center thickness is 10mm. The first radius (r1) is 105.89mm, the second radius (r2) is -92.87mm, and the third radius (r3) is -334mm. The lens also features a 4.5mm thickness at the center a.
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