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SLB-20-40N 20.0 mm Dia. x -40.0 mm FL; Plano-Concave Lens Uncoated

SLB-20-40N 20.0 mm Dia. x -40.0 mm FL; Plano-Concave Lens Uncoated

Type
Lens
Subtype
Spherical Lens (Plano-Concave)
Brand
OptoSigma
Product webpage
OptoSigma products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
20 mm
EFL
-40 mm
BFL
-41.3 mm
R1
-20.76 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-20-40N 20.0 mm Dia. x -40.0 mm FL; Plano-Concave Lens Uncoated

The SLB-20-40N is a Plano-Concave Lens, a type of spherical lens, sourced from OptoSigma. This lens has a base shape of a circle and is uncoated. The lens is designed with a diameter of 20.0 mm and a thickness edge of 4.6 mm, while the thickness at the center is 2.0 mm. The effective focal length (EFL) of this lens is -40.0 mm, making it a negative or diverging lens.

The lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence. The radius of curvature for this lens is -20.76 mm on the first surface, and the back focal length (BFL) is -41.3 mm. The lens does not have any inner or outer radius, indicating a uniform curvature.

The lens is designed to operate at a wavelength of 546.1 nm. The provided web link leads to the vendor's page, where users can find more information about the lens and its availability.

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