45-694 9mm Dia. x 18mm FL Uncoated; UV Plano-Convex Lens

The 45-694 is a 9mm diameter, 18mm focal length Plano-Convex lens, sourced from Edmund Optics. This lens is uncoated and optimized for use in the ultraviolet (UV) spectrum, making it an ideal choice for applications that require high transmission in this region.

The lens geometry features a convex surface with a radius of curvature of 8.25mm, resulting in a back focal length of 15.94mm. The edge thickness of the lens is 1.66mm, while the center thickness is 3mm. The lens is designed to operate without any additional optical elements between it and the light source, as indicated by its plano side.

The lens is fabricated from fused silica, a material with a high Abbe number, making it less susceptible to chromatic aberration. This material also offers excellent thermal stability and resistance to chemical etching, making it suitable for use in harsh environments.

The lens is designed to operate at a wavelength of 587.6nm, which falls within the visible light spectrum. However, its UV optimization makes it suitable for use at shorter wavelengths, where other materials may exhibit lower transmission.

Please note that the lens is uncoated, which may result in reduced transmission and increased susceptibility to surface damage. However, this also means that the lens can be easily integrated into systems that require specific coatings, as the user has the flexibility to apply the coating of their choice.