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SLB-20B-50NIR1 20.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 633-1064nm

SLB-20B-50NIR1 20.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 633-1064nm

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

Properties

Shape
Circular
Diameter
20 mm
EFL
-49.7 mm
BFL
-50.3 mm
R1
-51.9 mm
R2
51.9 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-20B-50NIR1 20.0 mm Dia. x -49.7 mm FL; Coated; Double-Concave Lens 633-1064nm

The SLB-20B-50NIR1 is a high-quality double-concave lens, boasting a diameter of 20.0 mm and a focal length of -49.7 mm. This lens is sourced from OptoSigma, a renowned vendor known for its precision optical components. The lens is made from n-bk7 schott, a material widely used in optical systems due to its excellent optical properties.

The lens features a base shape of a circle, with a thickness at the edge of 3.9 mm and a center thickness of 2 mm. The inner and outer radii are 0, indicating a uniform curvature. The effective focal length (EFL) is -49.7 mm, and the back focal length (BFL) is -50.3 mm. The radii of curvature for the first and second surfaces are -51.9 mm and 51.9 mm, respectively.

The SLB-20B-50NIR1 is coated with opt ir1 on both the front and back surfaces, enhancing its performance in the 633-1064nm wavelength range. This coating ensures high transmission and low reflection, making it suitable for various applications, including laser systems and imaging applications.

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