ASPH Precision-Molded Glass Aspheric Lenses
Mar 2007CVI Melles GriotRequest Info
ASPH aspheric lenses are diffraction limited, antireflection coated and available with numerical apertures from 0.30 to 0.55. Precision-molded glass aspheric lenses are a practical compromise between a multielement lens and a molded plastic lens. A molded glass aspheric lens has two advantages over a multielement lens. First, the aspheric design reduces spherical aberration and coma in a single element; and second, with fewer optical surfaces required, overall light transmission is higher. In addition, molded glass aspheres operate over a much broader temperature and humidity range than plastic lenses. Molded glass aspheres are often used in applications such as laser diode collimating and focusing, fiber coupling, barcode scanning, LCD and LCOS digital projection, optical data storage, microscopic measurement and distance remote sensing.