SLB-15B-20NIR2 15.0 mm Dia. x -19.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 15 mm
- EFL
- -19.7 mm
- BFL
- -20.3 mm
- R1
- -20.7 mm
- R2
- 20.7 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-15B-20NIR2 15.0 mm Dia. x -19.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-15B-20NIR2 is a high-quality double-concave lens, 15.0 mm in diameter, and featuring a focal length of -19.7 mm. This lens is sourced from OptoSigma, a renowned vendor known for their precision optical components.
The lens is made from n-bk7 schott, a popular material in the optical industry due to its excellent optical properties. The base shape of the lens is circular, making it suitable for a wide range of applications.
The geometry of the lens is carefully designed with a thickness of 4.8 mm at the edge and 2 mm at the center. The inner and outer radii are 0, and the curvature radii (r1 and r2) are -20.7 mm and 20.7 mm respectively. The back focal length (bfl) is -20.3 mm.
The lens is coated with opt ir2 on both the front and back, providing superior anti-reflective properties in the 750-1550nm wavelength range. This coating enhances the lens' performance in infrared applications, making it an ideal choice for systems operating in this spectrum.
