SLB-50.8B-120PM 50.8 mm Dia. x 121.3 mm FL; Coated; Double-Convex Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 121.3 mm
- BFL
- 118.6 mm
- R1
- 124.56 mm
- R2
- -124.56 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.518720636186463
- λ
- 546.1 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
SLB-50.8B-120PM 50.8 mm Dia. x 121.3 mm FL; Coated; Double-Convex Lens 400-700nm
The SLB-50.8B-120PM is a high-quality double-convex lens offered by OptoSigma, a leading vendor in the optical industry. This lens, with a diameter of 50.8 mm and a focal length of 121.3 mm, is designed for use in the visible light spectrum, specifically between 400-700 nm.
The lens is made from n-bk7 schott, a popular optical glass due to its excellent optical properties and relatively low cost. The base shape of the lens is circular, and it features a double-convex geometry, meaning both surfaces of the lens are curved outwards. The edge thickness of the lens is 2.8 mm, while the center thickness is 8 mm, providing a robust structure for various applications.
The SLB-50.8B-120PM comes with a broadband anti-reflection coating on both the front and back surfaces. This coating, often referred to as "opt m," is designed to reduce surface reflections and increase transmission in the spectral range of 400-700 nm. The effective focal length (EFL) of the lens is 121.3 mm, and the back focal length (BFL) is 118.6 mm, providing a long focal length for various optical applications.
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