LB1294 N-BK7 Bi-Convex Lens; Dia:1 in; f=175.0 mm Uncoated

The LB1294 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 and a focal length of 175.0 mm, is designed for use in a wide range of optical systems, including imaging, beam shaping, and laser applications.

The lens is made from N-BK7, a popular glass type known for its excellent optical properties. This material, also known as BK7, is a crown glass with a low refractive index and low dispersion, making it ideal for applications that require high image quality and color correction. The lens is uncoated, meaning it does not have any additional layers to enhance its optical properties or protect it from environmental factors.

The geometry of the lens includes a diameter of 25.4 mm, an edge thickness of 2 mm, and a center thickness of 2.9 mm. The effective focal length (EFL) is 175 mm, and the back focal length (BFL) is 174 mm. The radii of curvature for the first and second surfaces are 179.8 mm and -179.8 mm, respectively. The lens does not have any inner or outer radius, indicating a uniform thickness across the lens.

This lens is a spherical lens with a convex-convex shape, meaning both surfaces are curved outwards. This shape is often used in optical systems that require a high degree of focusing power. The lens is designed to work at a wavelength of 587.6 nm, making it suitable for applications that use visible light.