49-881 20.0mm Dia. x 25.0mm FL; Uncoated; Plano-Convex Lens

The 49-881 is a 20.0mm diameter, 25.0mm focal length Plano-Convex lens, sourced from the renowned optical components vendor, Edmund Optics. This lens, with its spherical geometry, is an uncoated optical element, designed for use in a wide range of applications.

The lens's base shape is circular, and it features a planar surface on one side and a convex surface on the other. The planar surface, or the 'plano' side, has no curvature, while the convex surface, or the 'convex' side, has a curvature that causes light rays to converge towards a single point, the focal point. The lens's geometry also includes a 1.26mm edge thickness and a 4mm center thickness.

The lens is made from n-SF11 Schott glass, a high-index, low-dispersion glass that offers excellent optical performance. The lens's effective focal length (EFL) is 25mm, and its back focal length (BFL) is 22.76mm. The lens's inner and outer radii are 0, indicating that the lens is a simple Plano-Convex design without any additional curvatures or features.

The lens is designed to operate at a wavelength of 587.6nm, making it suitable for use in applications that require high-precision optics in the visible light spectrum. The lens is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. This can result in higher levels of reflection, but it also allows for greater customization, as coatings can be added based on specific application requirements.