SLSQ-20B-30N 20.0 mm Dia. x -29.7 mm FL; Double-Concave Lens Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- -29.7 mm
- BFL
- -30.3 mm
- R1
- -27.6 mm
- R2
- 27.6 mm
Material
- Name
- Fused Silica
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.460077010624967
- λ
- 546.1 nm
- B1
- 0.6961663
- C1
- 0.00467914825849 μm2
- B2
- 0.4079426
- C2
- 0.013512063073959999 μm2
- B3
- 0.8974794
- C3
- 97.934002537921 μm2
SLSQ-20B-30N 20.0 mm Dia. x -29.7 mm FL; Double-Concave Lens Uncoated
The SLSQ-20B-30N is a high-quality double-concave lens offered by OptoSigma, a leading vendor in the optical industry. This lens is designed with a base shape of a circle and features a spherical geometry, making it suitable for a wide range of optical applications.
The lens has a diameter of 20.0 mm and a thickness at the edge of 5.8 mm. The center thickness is 2.0 mm, providing a sleek and compact design. The effective focal length (EFL) of this lens is -29.7 mm, indicating its double-concave nature. The first radius of curvature (R1) is -27.6 mm, while the second radius (R2) is 27.6 mm, contributing to its concave-concave structure.
The back focal length (BFL) of this lens is -30.3 mm. Notably, the inner and outer radii are both 0 mm, suggesting a uniform curvature throughout the lens. The lens is made of fused silica, a material with the material ID "fused sil mal-1965", which is known for its excellent optical properties and durability.
This lens is designed to operate at a wavelength of 546.1 nm. It does not come with any coating, offering a bare, uncoated surface. This could be ideal for applications where coating might interfere with the desired optical properties.
