SLB-20-40N 20.0 mm Dia. x -40.0 mm FL; Plano-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -40 mm
- BFL
- -41.3 mm
- R1
- -20.76 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-20-40N 20.0 mm Dia. x -40.0 mm FL; Plano-Concave Lens Uncoated
The SLB-20-40N is a Plano-Concave Lens, a type of spherical lens, sourced from OptoSigma. This lens has a base shape of a circle and is uncoated. The lens is designed with a diameter of 20.0 mm and a thickness edge of 4.6 mm, while the thickness at the center is 2.0 mm. The effective focal length (EFL) of this lens is -40.0 mm, making it a negative or diverging lens.
The lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence. The radius of curvature for this lens is -20.76 mm on the first surface, and the back focal length (BFL) is -41.3 mm. The lens does not have any inner or outer radius, indicating a uniform curvature.
The lens is designed to operate at a wavelength of 546.1 nm. The provided web link leads to the vendor's page, where users can find more information about the lens and its availability.
