LA1978 N-BK7 Plano-Convex Lens; Dia:1 in; f=750.0 mm Uncoated

The LA1978 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 1 inch, is designed for use in a variety of applications that require precise focusing or collimation of light.

The lens is made from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material is characterized by a low coefficient of thermal expansion, making it resistant to thermal shock and suitable for use in a wide range of temperatures. The lens also features a plano-convex geometry, with a flat (plano) surface on one side and a curved (convex) surface on the other. This design allows for efficient light collection and focusing.

The geometry of the lens includes a diameter of 25.4 millimeters, an edge thickness of 2 millimeters, and a center thickness of 2.2 millimeters. The effective focal length (EFL) of the lens is 750 millimeters, which determines the distance at which it will focus or collimate light. The radius of curvature of the curved surface is 386.3 millimeters, and the back focal length (BFL) is 746.1 millimeters.

The lens is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. While this can result in some light being reflected away from the lens, it also means that the lens is less susceptible to damage from environmental factors.