LA1102 N-BK7 Plano-Convex Lens; Dia:30.0 mm; f=50.0 mm Uncoated

The LA1102 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 30.0 mm, is designed to focus or collimate light in optical systems, making it suitable for a wide range of applications.

The lens is made of N-BK7, a popular glass type known for its excellent optical properties. This material, also known as Schott glass, has a refractive index of 1.5168 at 587.6 nm, which is the wavelength used in the item data. The lens's geometry is plano-convex, meaning one side is flat, and the other is curved, focusing light to a point.

The curvature of the lens is defined by a radius of 25.8 mm, and the effective focal length (EFL) is 50.0 mm. The EFL is the distance from the lens's center to the point where the light rays converge or diverge. The lens's thickness at the edge is 2.5 mm, and at the center, it is 7.3 mm. The back focal length (BFL) is 45.0 mm, which is the distance from the lens's rear surface to the focus.

This lens is uncoated, meaning it does not have any anti-reflective coatings. While coatings can reduce unwanted reflections and increase transmission, uncoated lenses can be advantageous in certain applications, such as when minimal reflection is desired.