49-794 25.4 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=76.2mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 76.2 mm
- R1
- 50.85 mm
- R2
- -40.06 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
49-794 25.4 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=76.2mm VIS-NIR 400-1000nm
The 49-794 is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 25.4 mm, is specifically engineered for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. The lens is constructed from two types of Schott glass, N-SSK8 and N-SF56, which are renowned for their optical clarity and durability.
The lens features an effective focal length (EFL) of 76.2 mm, making it suitable for a wide range of optical applications. The geometry of the lens is carefully crafted, with a thickness at the edge of 7.85 mm and a center thickness of 7 mm. The lens also includes an additional 3 mm thickness at the center a position. The inner and outer radii of the lens are 0, indicating a symmetrical design.
The 49-794 lens is coated with Edmund Optics' proprietary VIS-NIR coating (edm visnir0sp2002000), which is applied to both the front and back surfaces. This coating enhances the lens's performance in the VIS-NIR spectrum, reducing reflectance and improving transmission.
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