We propose and experimentally demonstrate an acousto-optic cylindrical lens with a very fast (400-kHz) focal scanning. The lens is realized by use of two adjacent acousto-optic scanners with counterpropagating acoustic waves that have the same frequency modulation but a π phase difference. This scheme completely suppresses the lateral scan but adds the linear chirp of the two waves and thus functions as a fast focal-scan lens. We also demonstrate the use of this scanning lens in a very fast confocal profilometer.
© 2001 Optical Society of America
Ariel Kaplan, Nir Friedman, and Nir Davidson, "Acousto-optic lens with very fast focus scanning," Opt. Lett. 26, 1078-1080 (2001)