SLB-25.4B-40NIR2 25.4 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
- 25.4 mm
- EFL
- -39.7 mm
- BFL
- -40.4 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-25.4B-40NIR2 25.4 mm Dia. x -39.7 mm FL; Coated; Double-Concave Lens 750-1550nm
OptoSigma presents the SLB-25.4B-40NIR2, a high-quality double-concave lens designed for use within the 750-1550nm wavelength range. This lens boasts a base shape of a circle with a diameter of 25.4mm, making it suitable for a wide variety of optical applications.
The lens features an edge thickness of 6mm and a center thickness of 2mm, ensuring durability and resilience. Its effective focal length (EFL) is -39.7mm, providing a concentrated, precise optical path. The first radius of curvature (R1) is -41.52mm, while the second radius of curvature (R2) is 41.52mm, both contributing to the lens's double-concave geometry.
The SLB-25.4B-40NIR2 is crafted from the renowned n-BK7 material, specifically from Schott, a trusted name in optical glass production. This material ensures excellent optical performance and consistency.
The lens is coated with Opt IR2 on both the front and back surfaces, enhancing its performance within the 750-1550nm wavelength range. This coating aids in reducing surface reflections and increasing transmission, thereby improving the overall efficiency and quality of the optical system in which it is used.