SLB-25.4B-50NIR2 25.4 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -49.7 mm
- BFL
- -50.4 mm
- R1
- -51.9 mm
- R2
- 51.9 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-25.4B-50NIR2 25.4 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-25.4B-50NIR2 is a high-quality double-concave lens, designed with a base shape of a circle and a diameter of 25.4 mm. This lens is sourced from OptoSigma, a renowned vendor known for its precision optical components. The lens is constructed from n-bk7 schott material, a popular choice for its excellent optical properties.
The lens features a significant double-concave geometry, with a center thickness of 2 mm and an edge thickness of 5.2 mm. The effective focal length (EFL) is -49.7 mm, indicating a strong converging effect. The radii of curvature for the first and second surfaces are -51.9 mm and 51.9 mm, respectively, contributing to the lens's double-concave structure. The back focal length (BFL) is -50.4 mm.
This lens is specifically designed for use in the wavelength range of 546.1 nm. It comes with a coating of opt ir2 on both the front and back surfaces, enhancing its performance in the infrared spectrum, particularly between 750 nm and 1550 nm.
