LB1309-C N-BK7 Bi-Convex Lens; Dia:2 in; f=75.0 mm ARC 1050-1700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
- EFL
- 500 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-C N-BK7 Bi-Convex Lens; Dia:2 in; f=75.0 mm ARC 1050-1700nm
The LB1309-C 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 2 inches, or 50.8 millimeters, and a focal length of 75.0 millimeters, making it suitable for a wide range of optical applications.
The lens is made from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material is particularly prized for its low dispersion, high homogeneity, and excellent transmission characteristics across a broad spectrum, from the ultraviolet to the infrared regions.
The LB1309-C features a spherical geometry, with both faces of the lens curved outwards. This design, known as a bi-convex lens, provides a wide field of view and low spherical aberration, making it ideal for imaging and beam shaping applications.
The lens is coated with a broadband anti-reflection coating, designed to reduce surface reflections and increase transmission across the 1050-1700 nanometer range. This coating ensures optimal performance in infrared applications, such as thermal imaging and laser systems.
