LB1157-C N-BK7 Bi-Convex Lens; Dia:6.0 mm; f=10.0 mm ARC 1050-1700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 6 mm
- EFL
- 400 mm
- BFL
- 9.2 mm
- R1
- 9.9 mm
- R2
- -9.9 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
LB1157-C N-BK7 Bi-Convex Lens; Dia:6.0 mm; f=10.0 mm ARC 1050-1700nm
The LB1157-C is a high-quality bi-convex lens from Thorlabs, designed with a spherical geometry and a circular base shape. This lens is fabricated from N-BK7 glass, a popular material in the optical industry due to its excellent optical properties. The lens has a diameter of 6.0 mm and a thickness that varies from 1.5 mm at the edge to 5.1 mm at the center.
The LB1157-C lens boasts an effective focal length (EFL) of 400 mm, making it suitable for a wide range of applications. The radii of curvature for the first and second surfaces are 9.9 mm and -9.9 mm, respectively, resulting in a back focal length (BFL) of 9.2 mm. The lens does not have any inner or outer radius, indicating a uniform thickness across the lens.
This lens is coated with a broadband anti-reflection coating, specifically designed for the wavelength range of 1050-1700 nm. This coating, denoted as "tho c bbar", reduces reflection and increases transmission, enhancing the overall performance of the lens.
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