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LB1869-C N-BK7 Bi-Convex Lens; Dia:1 in; f=500.0 mm ARC 1050-1700nm

LB1869-C N-BK7 Bi-Convex Lens; Dia:1 in; f=500.0 mm ARC 1050-1700nm

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

Properties

Shape
Circular
Diameter
25.4 mm
EFL
200 mm
BFL
499.2 mm
R1
514.7 mm
R2
-514.7 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

LB1869-C N-BK7 Bi-Convex Lens; Dia:1 in; f=500.0 mm ARC 1050-1700nm

The LB1869-C is a high-quality bi-convex lens offered by Thorlabs, a leading vendor in the optical industry. This lens, designed for use in the 1050-1700nm wavelength range, is made from N-BK7, a popular glass type known for its excellent optical properties.

The lens features a diameter of 1 inch (25.4mm) and a focal length of 500.0mm, making it suitable for a wide range of applications. The bi-convex shape, characterized by two convex surfaces, provides a high degree of focusing power. The lens has an effective focal length (EFL) of 200mm and a back focal length (BFL) of 499.2mm.

The LB1869-C is coated with Thorlab's anti-reflection coating, which is broadband and has a high transmission range. This coating, denoted as 'tho c bbar', is applied to both the front and back surfaces of the lens, reducing reflection and increasing transmission in the specified wavelength range.

The lens has a center thickness of 2.9mm and an edge thickness of 2mm, providing robustness and durability. The lens is spherical in shape, a common and versatile geometry in optical systems.

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