LA1257 N-BK7 Plano-Convex Lens; Dia:25.0 mm; f=75.0 mm Uncoated

The LA1257 N-BK7 Plano-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 25.0 mm, is designed to focus or collimate light beams in various optical systems.

The lens features a plano-convex geometry, meaning one side is flat (plano) while the other side is curved (convex). This design allows for efficient light collection and focusing. The radius of curvature of the convex surface is 38.6 mm, and the lens has a back focal length of 72.2 mm. The effective focal length (EFL) of the lens is 75.0 mm, which is the distance from the lens's principal plane to the focal point.

The lens is made of 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 of approximately 1.5168 at the specified wavelength of 632.8 nm. The lens's thickness at the edge is 2.02 mm, while the center thickness is 4.1 mm.

Notably, this lens is uncoated. Coatings are often applied to lenses to reduce surface reflections, increase transmission, or provide other desirable optical properties. However, this lens is designed to operate without a coating, which may be suitable for certain applications.

The lens data is valid and in stock, according to the vendor's website. This information assures users of the lens's availability and readiness for immediate use in their optical systems.