SLB-20-90P 20.0 mm Dia. x 90.0 mm FL; Plano-Convex Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 90 mm
- BFL
- 88 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-20-90P 20.0 mm Dia. x 90.0 mm FL; Plano-Convex Lens Uncoated
The SLB-20-90P is a Plano-Convex lens with a diameter of 20.0 mm and a focal length of 90.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence.
The lens geometry features a planar surface on one side and a convex surface on the other. The edge thickness is 2.0 mm, while the center thickness is 3.1 mm. The effective focal length (EFL) is 90.0 mm, and the radius of curvature (R1) is 46.71 mm. The back focal length (BFL) is 88.0 mm, and both the inner and outer radii are 0 mm.
This lens is uncoated, meaning it does not have any anti-reflective or other coatings. This may result in higher reflective losses and lower transmission compared to coated lenses. However, uncoated lenses are often preferred in applications where cost, simplicity, or specific optical properties are of primary concern.
The lens is designed to operate at a wavelength of 546.1 nm. It is spherical in shape, which is a common choice for many optical applications due to its ease of manufacturing and good optical performance.