SLB-40B-50NIR2 40.0 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
- 40 mm
- EFL
- -49.7 mm
- BFL
- -50.3 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-40B-50NIR2 40.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 750-1550nm
OptoSigma presents the SLB-40B-50NIR2, a spherical lens with a base shape of a circle and a sub-type of a double-concave lens. This lens is designed for use within the wavelength range of 546.1 nm and is suitable for applications in the near-infrared spectrum, between 750 nm and 1550 nm.
The SLB-40B-50NIR2 boasts a diameter of 40.0 mm and a thickness at the edge of 10.0 mm. The center thickness is considerably less at 2.0 mm, and the effective focal length (EFL) is -49.7 mm. The first radius of curvature (R1) is -51.9 mm, while the second radius of curvature (R2) is 51.9 mm, and the back focal length (BFL) is -50.3 mm. The lens does not have an inner or outer radius.
This lens is made of n-BK7 Schott, a popular optical glass due to its excellent optical properties. The lens features a coating of opt IR2 on both the front and back surfaces, enhancing its performance within the near-infrared spectrum.