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LB1378-A N-BK7 Bi-Convex Lens; Dia:0.5 in; f=40.0 mm ARC 350-700nm

LB1378-A N-BK7 Bi-Convex Lens; Dia:0.5 in; f=40.0 mm ARC 350-700nm

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

Properties

Shape
Circular
Diameter
12.7 mm
EFL
40 mm
BFL
39.1 mm
R1
40.7 mm
R2
-40.7 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

LB1378-A N-BK7 Bi-Convex Lens; Dia:0.5 in; f=40.0 mm ARC 350-700nm

The LB1378-A is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading global supplier of photonics equipment. This lens boasts a diameter of 0.5 inches (12.7 mm) and a focal length of 40.0 mm, making it suitable for a wide range of optical applications.

The lens is made from N-BK7, a popular optical glass due to its excellent optical properties and high Abbe number. This material ensures low dispersion and high homogeneity, making it an ideal choice for applications that require high-precision optics.

The LB1378-A features a spherical design, with radii of curvature of 40.7 mm for the first surface and -40.7 mm for the second surface. This bi-convex geometry helps to minimize spherical aberration, ensuring optimal image quality.

The lens has a central thickness of 2.8 mm and an edge thickness of 1.8 mm, providing robustness and durability. It is coated with a broadband anti-reflection coating, designed to operate between 350 nm and 700 nm. This coating reduces surface reflections, enhancing transmission and improving overall system performance.

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