L-PCX291 50 mm Dia. Plano-Convex Lens; EFL=175mm Uncoated

The L-PCX291 is a Plano-Convex lens with a diameter of 50 mm, sourced from the renowned optical vendor, Ross Optical. This lens is specifically designed for use in optical systems that require a convex lens with a flat surface on one side. The Plano-Convex design allows for a wide range of applications, including use as a focusing lens or a beam expander.

The lens has an effective focal length (EFL) of 175mm, making it suitable for use in systems where a longer focal length is required. The EFL is a critical parameter in lens selection, as it directly influences the lens's ability to focus light. A longer EFL, like that of the L-PCX291, can provide a narrower field of view and higher magnification.

The lens is made from N-BK7 Schott glass, a popular material for optical lenses due to its excellent optical properties and high damage threshold. This material is known for its low optical dispersion, making it ideal for applications that require high image quality and low chromatic aberration.

The geometry of the lens includes a thickness of 2.1mm at the edge and 5.6mm at the center. The inner and outer radii are 0, indicating a flat surface on one side and a curved surface on the other. The radius of curvature (R1) is 90.44mm, and the back focal length (BFL) is 170.73mm.

Notably, this lens is uncoated. While coatings can enhance a lens's performance by reducing reflection and increasing transmission, an uncoated lens can be advantageous in certain applications. For instance, uncoated lenses can be more cost-effective and are less susceptible to damage from environmental factors.