Biconvex lens

Biconvex lens
Double convex lenses (Double Convex Lenses) are composed of two convex surfaces with equal radii, which can focus light into a point with a positive focal length. Due to the symmetrical shape on both sides, it is a more suitable single element for 1:1 imaging applications. It is often used in imaging relay systems and object imaging or beam focusing, collimation, and beam expansion under finite conjugate distances. The characteristic of a biconvex lens is that the greater the conjugate ratio, the greater the aberration that occurs. Biconvex lenses are suitable for situations where the object and image are on both sides of the lens, and the ratio of the image distance to the object distance (conjugate ratio) is between 0.2 and 5.

AR coating options include UV, VIS, NIR, and SWIR. The anti-reflection coating on both sides of the biconvex lens can greatly reduce the reflection on the surface of the element and increase its transmittance. United Optics provides biconvex lenses with a variety of substrate materials, among which K9 optical glass substrates are suitable for applications in the visible and near-infrared bands, germanium, silicon, zinc selenide, and calcium fluoride substrates are suitable for infrared band applications, and fused silica It is suitable for ultraviolet band applications.