SLB-15-20NIR2 15.0 mm Dia. x -20.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 15 mm
- EFL
- -20 mm
- BFL
- -21.3 mm
- R1
- -10.38 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-15-20NIR2 15.0 mm Dia. x -20.0 mm FL; Coated; Plano-Concave Lens 750-1550nm
The SLB-15-20NIR2 is a plano-concave lens with a diameter of 15.0 mm and a focal length of -20.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence.
The lens geometry includes an inner radius of 0 mm and an outer radius of 0 mm, with a thickness at the edge of 5.2 mm and a thickness at the center of 2 mm. The effective focal length (EFL) is -20.0 mm, and the back focal length (BFL) is -21.3 mm. The curvature radius (R1) is -10.38 mm.
This lens is designed to operate within the wavelength range of 546.1 nm. It comes with a coating on both the front and back surfaces, specifically an opt IR2 coating. This coating enhances the lens' performance in the near-infrared region, making it suitable for applications in this spectrum.