SLB-20B-25NIR1 20.0 mm Dia. x -24.7 mm FL; Coated; Double-Concave Lens 633-1064nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -24.7 mm
- BFL
- -25.3 mm
- R1
- -25.95 mm
- R2
- 25.95 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-20B-25NIR1 20.0 mm Dia. x -24.7 mm FL; Coated; Double-Concave Lens 633-1064nm
The SLB-20B-25NIR1 is a high-quality double-concave lens, 20.0 mm in diameter, and featuring a focal length of -24.7 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is available for immediate purchase.
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, and it has a thickness of 6 mm at the edge and 2 mm at the center. The lens's design includes a double-concave geometry, with radii of curvature of -25.95 mm for the first surface and 25.95 mm for the second surface. The back focal length (BFL) is -25.3 mm, and the effective focal length (EFL) is -24.7 mm.
The SLB-20B-25NIR1 is coated with opt ir1 on both the front and back surfaces, enhancing its performance in the 633-1064nm wavelength range. This coating ensures high transmission and low reflection, making it ideal for applications that require high-quality imaging or light transmission.