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LB1391-A N-BK7 Bi-Convex Lens; Dia:1 in; f=400.0 mm ARC 350-700nm

LB1391-A N-BK7 Bi-Convex Lens; Dia:1 in; f=400.0 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
25.4 mm
EFL
400 mm
BFL
399.2 mm
R1
411.7 mm
R2
-411.7 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

LB1391-A N-BK7 Bi-Convex Lens; Dia:1 in; f=400.0 mm ARC 350-700nm

The LB1391-A is a high-quality bi-convex lens made from N-BK7 glass, a popular material for optical elements due to its excellent optical properties. This lens, sourced from Thorlabs, features a diameter of 1 inch and a focal length of 400.0 mm, making it suitable for a wide range of applications.

The lens's geometry includes a thickness of 2 mm at the edge and 2.4 mm at the center, with a back focal length of 399.2 mm. The inner and outer radii are 0, indicating a symmetrical design. The lens's shape is spherical, a common choice for its simplicity and versatility.

The LB1391-A is coated with ARC 350-700nm on both the front and back surfaces, enhancing its performance in the specified wavelength range. This anti-reflective coating reduces unwanted reflections and increases transmission, improving the lens's overall efficiency.

The lens's material, N-BK7, is known for its low dispersion and high homogeneity, making it an excellent choice for applications requiring high image quality and precision. The lens's bi-convex design, where both surfaces are convex, provides a large field of view and low spherical aberration.

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