49-793 25.4 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=63.5mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 63.5 mm
- R1
- 42.26 mm
- R2
- -33.37 mm
Material 1
- Name
- N-SSK8
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6203679865890697
- λ
- 550 nm
- B1
- 1.44857867
- C1
- 0.00869310149 μm2
- B2
- 0.117965926
- C2
- 0.0421566593 μm2
- B3
- 1.06937528
- C3
- 111.300666 μm2
Material 2
- Name
- N-SF56
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.791037231451858
- λ
- 550 nm
- B1
- 1.73562085
- C1
- 0.0129624742 μm2
- B2
- 0.317487012
- C2
- 0.0612884288 μm2
- B3
- 1.95398203
- C3
- 161.559441 μm2
49-793 25.4 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=63.5mm VIS-NIR 400-1000nm
The 49-793 is a high-quality achromatic doublet lens, boasting a 25.4 mm diameter and an effective focal length (EFL) of 63.5mm. This lens is designed for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm.
The lens is composed of two elements, made from N-SSK8 and N-SF56 Schott glass, which are renowned for their excellent optical properties. The first element has a radius of curvature (R1) of 42.26mm, while the second element has an R1 of -33.37mm and an R2 of -123.45mm. The center thickness of the lens is 8mm, with a reduced thickness of 3.5mm at the edge.
The 49-793 is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces, enhancing its performance in the specified wavelength range. This coating reduces surface reflections, improving transmission and overall image quality.
This lens is a multiplet, meaning it is a compound lens made up of multiple elements. The geometry of the lens, including its diameter, thickness, and radii of curvature, are all carefully designed to minimize optical aberrations and deliver sharp, clear images.
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