SLB-20B-20NIR2 20.0 mm Dia. x -19.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -19.7 mm
- BFL
- -20.3 mm
- R1
- -20.76 mm
- R2
- 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-20B-20NIR2 20.0 mm Dia. x -19.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-20B-20NIR2 is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a diameter of 20.0 mm and a focal length of -19.7 mm, is made from the renowned material n-BK7 Schott, ensuring durability and reliability.
The lens features a base shape of a circle, with a thickness at the edge of 7.1 mm and a center thickness of 2.0 mm. The front and back surfaces of the lens are coated with Opt IR2, a coating specifically designed for the wavelength of 546.1 nm, enhancing its performance in the 750-1550nm spectral range.
The geometry of the lens is characterized by its radii of curvature, with r1 being -20.76 mm and r2 being 20.76 mm. The back focal length (BFL) is -20.3 mm, and the lens has no inner or outer radius.
The lens is currently in stock and available for immediate purchase through the provided weblink. With its superior quality and performance, the SLB-20B-20NIR2 is an excellent choice for various optical applications within its specified wavelength range.