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LA1951-B N-BK7 Plano-Convex Lens; Dia:1 in; f=25.4 mm ARC 650-1050nm

LA1951-B N-BK7 Plano-Convex Lens; Dia:1 in; f=25.4 mm ARC 650-1050nm

Type
Lens
Subtype
Spherical Lens (Plano-Convex)
Brand
Thorlabs
Product webpage
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Properties

Shape
Circular
Diameter
25.4 mm
EFL
25.4 mm
BFL
17.6 mm
R1
13.1 mm

Material

Name
N-BK7
Dispersion Equation
Sellmeier
n (λ)
1.5167984379050088
λ
587.6 nm
B1
1.03961212
C1
0.00600069867 μm2
B2
0.231792344
C2
0.0200179144 μm2
B3
1.01046945
C3
103.560653 μm2

LA1951-B N-BK7 Plano-Convex Lens; Dia:1 in; f=25.4 mm ARC 650-1050nm

The LA1951-B is a plano-convex lens from Thorlabs, designed with a spherical surface and a circular base shape. This lens is fabricated from N-BK7, a popular glass type from Schott, known for its excellent optical properties. The lens has a diameter of 1 inch (25.4 mm) and a thickness of 1.8 mm at the edge, while the center thickness measures 11.7 mm.

The lens' effective focal length (EFL) is 25.4 mm, and its radius of curvature (R1) is 13.1 mm. The back focal length (BFL) is 17.6 mm. The lens does not have an inner or outer radius.

The LA1951-B is coated with Thorlabs' BBAR coating (Broadband Anti-Reflection) on both the front and back surfaces, specifically designed for the ARC 650-1050nm range. This coating enhances the lens' performance by reducing surface reflections and increasing transmission.

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