SLB-25B-35NIR2 25.0 mm Dia. x -34.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -34.7 mm
- BFL
- -35.3 mm
- R1
- -36.33 mm
- R2
- 36.33 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-35NIR2 25.0 mm Dia. x -34.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-25B-35NIR2 is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a diameter of 25.0 mm and a focal length of -34.7 mm, is made from the renowned material n-BK7 Schott, ensuring durability and reliability.
The lens features a unique double-concave geometry, with radii of curvature of -36.33 mm and 36.33 mm for the front and back surfaces, respectively. This design results in a back focal length of -35.3 mm, providing a compact and efficient optical solution. The lens has an edge thickness of 6.4 mm and a center thickness of 2 mm, offering robustness and resistance to deformation.
The SLB-25B-35NIR2 is coated with Opt IR2 on both the front and back surfaces, enhancing its performance in the 750-1550nm wavelength range. This coating reduces reflection and increases transmission, making it ideal for applications such as IR imaging, spectroscopy, and beam shaping.
