SLB-40B-50N 40.0 mm Dia. x -49.7 mm FL; Double-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- -49.7 mm
- BFL
- -50.3 mm
- R1
- -51.9 mm
- R2
- 51.9 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-40B-50N 40.0 mm Dia. x -49.7 mm FL; Double-Concave Lens Uncoated
The SLB-40B-50N is a high-quality double-concave lens offered by OptoSigma, a leading vendor in the optical industry. This lens, designed with a base shape of a circle, is constructed from n-BK7 Schott, a material known for its excellent optical properties.
The lens features a diameter of 40.0 mm and a thickness at the edge of 10.0 mm. The center thickness is significantly less at 2.0 mm, indicating a highly curved lens. The effective focal length (EFL) is -49.7 mm, suggesting a strong converging capability.
The first radius of curvature (R1) is -51.9 mm, and the second radius of curvature (R2) is 51.9 mm. These values, along with the EFL, contribute to the lens's double-concave structure. The back focal length (BFL) is -50.3 mm.
Notably, this lens is uncoated, which means it does not have any anti-reflective or other coatings. This may result in higher reflectivity, especially at the lens's edges, and could affect the lens's performance in certain applications.
The lens is designed for use at a wavelength of 546.1 nm. It is important to note that the performance of the lens can vary depending on the wavelength of the light used.