SLB-20-90NM 20.0 mm Dia. x -90.0 mm FL; Coated; Plano-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -90 mm
- BFL
- -91.3 mm
- R1
- -46.71 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-20-90NM 20.0 mm Dia. x -90.0 mm FL; Coated; Plano-Concave Lens 400-700nm
The SLB-20-90NM is a Plano-Concave Spherical Lens, sourced from OptoSigma, with a diameter of 20.0 mm and a focal length of -90.0 mm. This lens is designed for use within the wavelength range of 400-700nm, making it suitable for a wide range of optical applications.
The lens is made from n-bk7 schott, a popular material in the optical industry due to its excellent optical properties. The lens's geometry includes a thickness edge of 3.1 mm and a thickness center of 2 mm, with an effective focal length (EFL) of -90 mm. The front and back surfaces of the lens are coated with "opt m", a coating type that enhances the lens's performance and durability.
The lens's inner and outer radii are 0, indicating a flat surface on one side and a curved surface on the other. The curvature of the lens is represented by a radius of -46.71 mm on the curved surface. The back focal length (BFL) of the lens is -91.3 mm.
The lens's type, Sub Type, and Base Shape are "Lens", "Spherical Lens (Plano-Concave)", and "Circular", respectively. The lens's vendor, OptoSigma, provides a weblink for this product, which is currently valid and indicates that the lens is in stock.