89-683 40 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=50mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 50 mm
- R1
- 28.56 mm
- R2
- -29.96 mm
Material 1
- Name
- N-SK11
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5658215515592446
- λ
- 550 nm
- B1
- 1.17963631
- C1
- 0.00680282081 μm2
- B2
- 0.229817295
- C2
- 0.0219737205 μm2
- B3
- 0.935789652
- C3
- 101.513232 μm2
Material 2
- Name
- N-SF5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6771143911586193
- λ
- 550 nm
- B1
- 1.52481889
- C1
- 0.011254756 μm2
- B2
- 0.187085527
- C2
- 0.0588995392 μm2
- B3
- 1.42729015
- C3
- 129.141675 μm2
89-683 40 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=50mm VIS-NIR 400-1000nm
The 89-683 is a high-quality achromatic doublet lens, boasting a 40 mm diameter and a focal length of 50 mm, specifically designed for the visual (VIS) and near-infrared (NIR) spectrum, spanning 400-1000 nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase through their website.
The lens is constructed from two types of Schott glass, N-SK11 and N-SF5, which are renowned for their excellent optical properties. The front and back surfaces of the lens are coated with the EDM VIS-NIR 0SP2002000 coating, enhancing its performance in the specified wavelength range.
The lens geometry is meticulously designed, with an outer radius of 0 mm and an inner radius of 0 mm. The edge thickness measures 16.52 mm, while the center thickness is 19 mm. The lens also features a central thickness 'a' of 7 mm. The curvature radii of the lens surfaces are r1 = 28.56 mm, r2 = -29.965 mm, and r3 = -153.666 mm.
