LB1106-B N-BK7 Bi-Convex Lens; Dia:2 in; f=125.0 mm ARC 650-1050nm

The LB1106-B N-BK7 Bi-Convex Lens is a high-quality optical component sourced from Thorlabs, a leading vendor in the field of optical equipment. This lens, with a diameter of 2 inches, is designed for use in the wavelength range of 650-1050nm, making it suitable for a wide range of applications in the near-infrared spectrum.

The lens is constructed from N-BK7, a type of borosilicate glass manufactured by Schott, which is known for its excellent optical properties and high damage threshold. The lens features a bi-convex geometry, meaning it has two spherical surfaces that are both convex, or outwardly curved. This design provides a high degree of focusing power, making the lens ideal for use in imaging systems, beam shaping, and other applications where a tight focus is required.

The lens has a focal length of 125.0mm, as determined by its effective focal length (EFL). This is the distance from the lens to the point where it focuses light to a point, and it is a key parameter in determining the lens's magnification and field of view. The lens also has a thickness of 3mm at the edge and 8.1mm at the center, providing structural rigidity and resistance to deformation.

The lens is coated with a broadband anti-reflection coating (ARC), specifically the Thorlabs BBAR coating, on both the front and back surfaces. This coating reduces reflection across the entire 650-1050nm wavelength range, improving transmission and reducing losses. The coating also helps to protect the lens surface from environmental contaminants and damage.