LC1254-A N-BK7 Plano-Concave Lens; Dia:25 mm; f=-100.0 mm ARC 350-700nm

The LC1254-A is a plano-concave lens, part of Thorlabs' extensive catalog of optical elements. This lens is designed with a spherical geometry, featuring a base shape of a circle. The lens has a diameter of 25 mm and a thickness at the edge of 5.5 mm, while the center thickness measures 4 mm.

The lens' effective focal length (EFL) is -100 mm, indicating its diverging nature. The radius of curvature (R1) is -51.5 mm, and the back focal length (BFL) is -102.6 mm. The lens does not have an inner or outer radius, suggesting a uniform curvature.

The lens is made of n-BK7, a type of glass manufactured by Schott. This material is known for its excellent optical properties, making it a popular choice for various applications. The lens is designed to operate at a wavelength of 632.8 nm.

The lens features anti-reflection coatings on both the front and back surfaces. These coatings, designated as "tho a bbar," are designed to reduce reflection and increase transmission across the 350-700 nm spectral range. This coating enhances the lens' performance, making it suitable for use in a wide range of applications.