SLB-20-150N 20.0 mm Dia. x -150.0 mm FL; Plano-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -150 mm
- BFL
- -151.3 mm
- R1
- -77.85 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-20-150N 20.0 mm Dia. x -150.0 mm FL; Plano-Concave Lens Uncoated
The SLB-20-150N is a Plano-Concave Lens with a 20.0 mm diameter and a focal length of -150.0 mm, sourced from OptoSigma. This lens is made of n-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties, making it suitable for various applications.
The lens features a base shape of a circle, with a thickness at the edge of 2.6 mm and a center thickness of 2 mm. The inner and outer radii are both 0 mm, indicating a uniform curvature. The back focal length (BFL) is -151.3 mm, slightly longer than the specified focal length, which is typical for Plano-Concave lenses.
This lens is uncoated, meaning it does not have any anti-reflective or other surface coatings. While this may result in higher reflective losses, it also means the lens can be used in a wider range of wavelengths without the risk of coating damage.
The lens is currently in stock and can be purchased directly from the OptoSigma website, with the provided weblink providing direct access to the product page. This lens is a versatile option for those needing a Plano-Concave lens with a long focal length and a moderate diameter.