SLB-20B-50NIR1 20.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 633-1064nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -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-20B-50NIR1 20.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 633-1064nm
The SLB-20B-50NIR1 is a high-quality double-concave lens, boasting a diameter of 20.0 mm and a focal length of -49.7 mm. This lens is sourced from OptoSigma, a renowned vendor known for its precision optical components. The lens is made from n-bk7 schott, a material widely used in optical systems due to its excellent optical properties.
The lens features a base shape of a circle, with a thickness at the edge of 3.9 mm and a center thickness of 2 mm. The inner and outer radii are 0, indicating a uniform curvature. The effective focal length (EFL) is -49.7 mm, and the back focal length (BFL) is -50.3 mm. The radii of curvature for the first and second surfaces are -51.9 mm and 51.9 mm, respectively.
The SLB-20B-50NIR1 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 suitable for various applications, including laser systems and imaging applications.