49-787 12.7 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=31.75mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 31.75 mm
- R1
- 21.13 mm
- R2
- -16.69 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
49-787 12.7 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=31.75mm VIS-NIR 400-1000nm
The 49-787 is a high-quality achromatic doublet lens from Edmund Optics, designed for use in the visible (VIS) and near-infrared (NIR) spectrum, specifically catering to the wavelength range of 400-1000nm. This lens is a multiplet, meaning it is composed of multiple optical elements, in this case, two, to achieve superior optical performance.
The lens features a 12.7mm diameter and a focal length of 31.75mm, making it suitable for a wide range of applications that require compact, high-performance optics. The lens is constructed from N-SSK8 and N-SF56 Schott glass, which are renowned for their excellent optical properties and durability.
The 49-787 lens comes with a front and back coating of EDMM VISNIR0SP2002000, a broadband anti-reflection coating designed for use in the 400-1000nm range. This coating significantly reduces surface reflections, thereby improving light transmission and enhancing the overall performance of the lens.
The lens geometry includes a center thickness of 4mm, a edge thickness of 4.45mm, and radii of curvature of r1=21.13mm, r2=-16.69mm, and r3=-61.73mm. These parameters contribute to the lens's excellent imaging performance and low distortion.
