Abstract
A novel autofocusing effect in an optical pickup using a diode laser has been discovered. This effect occurs when a diode laser beam is focused on a disk surface through a focusing lens with chromatic aberration, and a certain amount of the reflected light from the disk is fed back to the diode laser. The wavelength of the diode laser changes with the movement of the disk to keep the amount of optical feedback to the diode laser at a maximum. As a result, focusing of the laser beam onto the disk may be automatically controlled without any lens actuators.
© 1987 Optical Society of America
Full Article | PDF ArticleMore Like This
Shogo Ura, Toshiaki Suhara, and Hiroshi Nishihara
Appl. Opt. 26(22) 4777-4782 (1987)
Hsi-Fu Shih, Chao-Yang Cheng, Yuan-Chin Lee, and Cheng-Hsiung Kuo
Opt. Express 17(17) 14676-14686 (2009)
Hisao Kikuta, Koichi Iwata, and Ryo Nagata
Appl. Opt. 26(9) 1654-1660 (1987)