SLB-50-90N 50.0 mm Dia. x -90.0 mm FL; Plano-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- -90 mm
- BFL
- -92 mm
- R1
- -46.71 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-50-90N 50.0 mm Dia. x -90.0 mm FL; Plano-Concave Lens Uncoated
The SLB-50-90N is a Plano-Concave Lens, part of OptoSigma's extensive catalog of optical elements. This lens, with a diameter of 50.0 mm, is designed to provide a negative focal length of -90.0 mm, making it ideal for applications that require light convergence.
The lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low dispersion. This material is widely used in various optical systems due to its superior optical properties. The lens's geometry includes an inner radius of 0 mm and an outer radius of 0 mm, indicating a simple spherical shape.
The lens's thickness at the edge is 10.3 mm, while the center thickness is 3 mm. This variation in thickness is designed to provide the required curvature for the specified focal length. The back focal length (BFL) is -92 mm, slightly exceeding the effective focal length (EFL) to accommodate the lens's thickness.
Notably, this lens is uncoated. While coatings can enhance a lens's performance by reducing reflection, increasing transmission, or providing other benefits, an uncoated lens can be suitable for certain applications, such as those where cost or simplicity is a priority.