SLB-25B-40NIR2 25.0 mm Dia. x -39.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -39.7 mm
- BFL
- -40.3 mm
- R1
- -41.52 mm
- R2
- 41.52 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-25B-40NIR2 25.0 mm Dia. x -39.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-25B-40NIR2 is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a diameter of 25.0 mm, is specifically engineered for use within the wavelength range of 750-1550nm, making it ideal for near-infrared (NIR) applications.
The lens features a base shape of a circle and is constructed from the material n-bk7 schott, a popular choice in the optical industry due to its excellent optical properties. The lens's geometry includes an edge thickness of 5.9 mm and a center thickness of 2 mm, with a focal length of -39.7 mm. The inner and outer radii are not specified, indicating that they are not a significant factor in this lens's design or use.
The SLB-25B-40NIR2 is coated with Opt IR2 on both the front and back surfaces. This coating enhances the lens's performance within its specified wavelength range, improving transmission and reducing unwanted reflections.