LB1676-B N-BK7 Bi-Convex Lens; Dia:1 in; f=100.0 mm ARC 650-1050nm

The LB1676-B N-BK7 Bi-Convex Lens is a high-quality optical component sourced from Thorlabs, a leading vendor in the field of precision photonics. This lens, with a diameter of 1 inch, is designed for use in the spectral range of 650-1050nm, making it suitable for a wide range of applications in the near-infrared region.

The lens features a bi-convex geometry, meaning it has a convex shape on both sides. The first radius of curvature (r1) is 102.4, while the second radius of curvature (r2) is -102.4, indicating that the lens curves inward and outward, respectively. This geometry results in a back focal length (bfl) of 98.8 and an effective focal length (efl) of 100.0, providing a focused beam at a distance determined by these parameters.

The lens is made from N-BK7, a popular glass type in the optical industry due to its excellent optical properties. This material, also known as Schott glass, has a refractive index that varies with wavelength, making it suitable for broadband applications.

The LB1676-B lens is coated with a broadband anti-reflection coating (ARC), specifically designed for the 650-1050nm range. This coating reduces reflection at the lens surfaces, improving transmission and reducing unwanted back-reflections. The coating is applied to both the front and back surfaces of the lens, ensuring optimal performance.

In terms of dimensions, the lens has a thickness of 2mm at the edge and 3.6mm at the center. The lens is circular in shape, providing a uniform beam profile.