49-873 5.0mm Dia. x 20.0mm FL; Uncoated; Plano-Convex Lens

The 49-873 is a 5.0mm diameter, 20.0mm focal length Plano-Convex lens, sourced from the renowned optical components manufacturer, Edmund Optics. This lens, with its spherical geometry and circular base shape, is an uncoated optical element, designed for use in a wide range of applications.

The lens's geometry features a 1.19mm edge thickness and a 1.5mm center thickness, with an effective focal length (EFL) of 20mm. The inner and outer radii are both zero, indicating a plano surface on one side and a curved surface on the other. The curvature of the lens is defined by a radius of 10.34mm, and the back focal length (BFL) is 19.02mm.

The lens is made from the high-quality material N-BK7 Schott, a borosilicate crown glass known for its excellent optical properties, including a high Abbe number and low dispersion. This makes the lens suitable for use in applications where high image quality and color correction are essential.

The lens is designed to operate at a wavelength of 587.6nm. It is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. This can be advantageous in certain applications where a natural lens surface is required, but it may also result in increased reflection and decreased transmission.