SLB-20B-40NM 20.0 mm Dia. x -39.7 mm FL; Coated; Double-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -39.7 mm
- BFL
- -40.3 mm
- R1
- -41.52 mm
- R2
- 41.52 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-40NM 20.0 mm Dia. x -39.7 mm FL; Coated; Double-Concave Lens 400-700nm
The SLB-20B-40NM is a high-quality double-concave lens, boasting a diameter of 20.0 mm and a focal length of -39.7 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, and it features a spherical geometry, with a center thickness of 2.0 mm and an edge thickness of 4.4 mm. The inner and outer radii are both 0, indicating a uniform curvature.
The SLB-20B-40NM is coated with opt m on both the front and back surfaces, enhancing its performance in the 400-700nm wavelength range. This coating ensures high transmission and low reflection, making it ideal for a wide range of applications.
The lens is currently in stock and available for immediate purchase. For more information, please refer to the vendor's website using the provided weblink.