Profile: SiChuan JUKA Optical Technology specializes in providing high-precision optical system solutions. Spherical Lens, also known as singlets, are optical lenses with curved surfaces that cause light rays to converge or diverge. A converging lens is called a convex lens. It is thicker at the center than at the edges. Convex lenses have several shapes and sizes based on their appearance and working principle. Aspheric lenses are lens with a different shape than a regular spherical or cylindrical surface. These lenses come in a variety of shapes to correct spherical aberration and improve image quality. Spherical aberration is a defect that occurs when light passes through a spherical lens.