49-780-INK 25.4 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=63.5mm VIS 0° 425-675nm
- 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
49-780-INK 25.4 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=63.5mm VIS 0° 425-675nm
The 49-780-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 25.4 mm, is designed for use within the visible light spectrum, specifically between 425 and 675 nanometers. The lens boasts an effective focal length (EFL) of 63.5 mm, making it suitable for a wide range of optical applications.
The lens is constructed from two types of Schott glass, N-SSK8 and N-SF56, which are carefully selected to minimize chromatic aberration, a common issue in optical systems. The front and back surfaces of the lens are coated with EDMM Vis-0 Standard Curve coatings, further enhancing its performance by reducing surface reflections and improving transmission.
The lens geometry is intricately designed, with a center thickness of 8 mm and an edge thickness of 8.89 mm. The first and second radii of curvature are 42.26 mm and -33.37 mm, respectively, while the third radius of curvature is -123.45 mm. The lens's inner and outer radii are both zero, indicating a circular shape.
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