SLB-50.8B-250NIR2 50.8 mm Dia. x -249.5 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- -249.5 mm
- BFL
- -250.5 mm
- R1
- -259.5 mm
- R2
- 259.5 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-50.8B-250NIR2 50.8 mm Dia. x -249.5 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-50.8B-250NIR2 is a high-quality double-concave lens, 50.8 mm in diameter, designed for use in the near-infrared spectrum of 750-1550nm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is currently in stock, as indicated by its weblink status.
The lens is made from n-bk7 schott, a popular material in the optical industry due to its excellent optical properties. It features a base shape of a circle, with a thickness of 5.5mm at the edge and 3mm at the center. The effective focal length (EFL) of this lens is -249.5mm, making it a powerful tool for focusing or diverging light in various applications.
The radii of curvature for this lens are -259.5mm for the first surface and 259.5mm for the second surface. The back focal length (BFL) is -250.5mm, and both the inner and outer radii are 0mm. This lens is coated with opt ir2 on both the front and back surfaces, enhancing its performance in the near-infrared spectrum.