SLB-25.4B-70NM 25.4 mm Dia. x -69.7 mm FL; Coated; Double-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -69.7 mm
- BFL
- -70.4 mm
- R1
- -72.66 mm
- R2
- 72.66 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-70NM 25.4 mm Dia. x -69.7 mm FL; Coated; Double-Concave Lens 400-700nm
This is a high-quality double-concave lens, the SLB-25.4B-70NM, sourced from OptoSigma. It is designed with a base shape of a circle and features a spherical geometry. The lens has a diameter of 25.4 mm and a thickness at the edge of 4.2 mm, while the center thickness is 2 mm. The effective focal length (EFL) of this lens is -69.7 mm, making it a powerful tool for focusing light.
The lens is made from n-bk7 schott, a material known for its excellent optical properties. The double-concave design, with radii of curvature of -72.66 mm for the first surface and 72.66 mm for the second, ensures precise light bending. The back focal length (BFL) is -70.4 mm, and the lens has no inner or outer radius.
The SLB-25.4B-70NM is coated with opt m on both the front and back surfaces, enhancing its performance in the 400-700nm wavelength range. This coating reduces reflection and increases transmission, making the lens ideal for use in a wide range of applications, including imaging systems, beam shaping, and laser applications.