Abstract: | : By aspherical elements, the structure of an opto electronic device will be simplified greatly, the size and weight of the device will be reduced. The application range of aspherical element gets wider and wider recently. The applications of aspheric lenses in some opto electronic devices, such as CD player, fiber coupling device and barcode scanner, are related. The reason for using aspheric lenses in these devices, the quality of the lens, as well as the material of it, are given. |