LB1309-B N-BK7 Bi-Convex Lens; Dia:2 in; f=75.0 mm ARC 650-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 75 mm
- BFL
- 71 mm
- R1
- 75.2 mm
- R2
- -75.2 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
LB1309-B N-BK7 Bi-Convex Lens; Dia:2 in; f=75.0 mm ARC 650-1050nm
The LB1309-B is a high-quality bi-convex lens, featuring a spherical design and a circular base shape. Manufactured by Thorlabs, a renowned vendor in the optical industry, this lens boasts a diameter of 2 inches (50.8 mm) and a focal length of 75.0 mm. The lens is made of N-BK7, a popular glass type from Schott, which is known for its excellent optical properties.
The LB1309-B lens has a front and back coating of tho b bbar, providing anti-reflection properties within the spectral range of 650-1050nm. This coating enhances the lens's performance by reducing surface reflections, thereby increasing transmission and improving overall image quality.
The lens's geometry includes a thickness edge of 3 mm and a thickness center of 11.8 mm. The effective focal length (EFL) is 75 mm, while the back focal length (BFL) is 71 mm. The radii of curvature for the first and second surfaces are 75.2 mm and -75.2 mm, respectively. The lens does not have an inner or outer radius.
