SLB-20B-120PM 20.0 mm Dia. x 120.5 mm FL; Coated; Double-Convex Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 120.5 mm
- BFL
- 119.5 mm
- R1
- 124.56 mm
- R2
- -124.56 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-120PM 20.0 mm Dia. x 120.5 mm FL; Coated; Double-Convex Lens 400-700nm
The SLB-20B-120PM is a high-quality double-convex lens, boasting a 20.0 mm diameter and a focal length of 120.5 mm. This lens is sourced from OptoSigma, a renowned vendor known for their precision optical components.
The lens is crafted 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, with a thickness of 2 mm at the edge and 2.8 mm at the center. The effective focal length (EFL) is 120.5 mm, and the back focal length (BFL) is 119.5 mm.
The SLB-20B-120PM features a double-convex geometry, with radii of curvature of 124.56 mm for the first surface and -124.56 mm for the second surface. The inner and outer radii are both 0 mm, indicating a uniform curvature throughout the lens.
This lens is coated with an opt m coating on both the front and back surfaces, enhancing its performance in the 400-700nm wavelength range. The coating helps to reduce reflection and increase transmission, making this lens ideal for a wide range of applications.