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LB1917-B N-BK7 Bi-Convex Lens; Dia:2 in; f=300.0 mm ARC 650-1050nm

LB1917-B N-BK7 Bi-Convex Lens; Dia:2 in; f=300.0 mm ARC 650-1050nm

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

Properties

Shape
Circular
Diameter
50.8 mm
EFL
300 mm
BFL
298.3 mm
R1
308.2 mm
R2
-308.2 mm

Material

Name
N-BK7
Dispersion Equation
Sellmeier
n (λ)
1.5150823520020043
λ
633 nm
B1
1.03961212
C1
0.00600069867 μm2
B2
0.231792344
C2
0.0200179144 μm2
B3
1.01046945
C3
103.560653 μm2

LB1917-B N-BK7 Bi-Convex Lens; Dia:2 in; f=300.0 mm ARC 650-1050nm

The LB1917-B is a high-quality bi-convex lens from Thorlabs, designed for use in a wide range of optical applications. This lens is made from N-BK7, a popular glass type known for its excellent optical properties, and features a diameter of 2 inches and a focal length of 300.0 mm.

The lens is spherical in shape, with a front radius of curvature (R1) of 308.2 and a back radius of curvature (R2) of -308.2. This bi-convex design allows for efficient light collection and focusing, making it ideal for use in imaging systems, beam shaping, and other applications where precise light control is required.

The LB1917-B is coated with Thorlabs' BBAR coating on both the front and back surfaces, which reduces reflection and increases transmission in the 650-1050nm wavelength range. This coating enhances the lens' performance in near-infrared applications, such as laser systems and spectroscopy.

The lens has a thickness of 3mm at the edge and 5.1mm at the center, providing robustness and durability. It is available for purchase directly from Thorlabs, and the company's website indicates that it is currently in stock.

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