A bi-convex lens will focus light into a point with a positive focal length, consisting of two convex surfaces of equal radius. Commonly used in imaging relay systems and object imaging at limited conjugate distances. The characteristic is that the larger the conjugation ratio, the larger the generated aberration.
Jingsheng Optoelectronics Technology provides uncoated, AR-coated bi-convex lenses. AR coating options include UV, VIS, NIR, and SWIR. Germanium, silicon or zinc selenide substrates are suitable for infrared applications, and fused silica is suitable for ultraviolet applications.