SLB-20B-50N 20.0 mm Dia. x -49.7 mm FL; Double-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 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-20B-50N 20.0 mm Dia. x -49.7 mm FL; Double-Concave Lens Uncoated
The SLB-20B-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 fabricated from the renowned material n-BK7 Schott, ensuring durability and reliability.
The lens boasts a diameter of 20.0 mm and a thickness at the edge of 3.9 mm, while the center thickness is 2 mm. The effective focal length (EFL) is -49.7 mm, indicating a strong converging power. The first radius of curvature (R1) is -51.9 mm, and the second radius (R2) is 51.9 mm, demonstrating the double-concave nature of the lens.
The back focal length (BFL) is -50.3 mm, and the lens does not have any coating, which is indicated in the 'coating' parameter being an empty object. This lens is designed to operate at a wavelength of 546.1 nm, making it suitable for various applications in the optical field.
