SLB-20B-120P 20.0 mm Dia. x 120.5 mm FL; Double-Convex Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 120.5 mm
- BFL
- 119.5 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-20B-120P 20.0 mm Dia. x 120.5 mm FL; Double-Convex Lens Uncoated
The SLB-20B-120P is a high-quality double-convex lens offered by OptoSigma, a renowned vendor in the optical industry. This lens, with a diameter of 20.0 mm and a focal length of 120.5 mm, is designed for use in a wide range of optical applications.
The lens is made from n-BK7 Schott, a popular optical glass known for its excellent optical properties. The base shape of the lens is circular, and it features a spherical geometry. The thickness at the edge of the lens is 2.0 mm, while the thickness at the center is 2.8 mm. The effective focal length (EFL) is 120.5 mm, and the back focal length (BFL) is 119.5 mm.
The lens is uncoated, which means it does not have any anti-reflective coatings. While this may result in a higher reflectance at the air-glass interfaces, it also means the lens is more cost-effective and suitable for applications where such coatings are not necessary.
The lens is available for purchase through the OptoSigma website, and the link provided indicates that it is currently in stock. This makes it an ideal choice for users who need a reliable and readily available optical component for their projects.