Title :
Control techniques for optical image stabilizing system
Author :
Sato, Koichi ; Ishizuka, Shigeki ; Nikami, Akira ; Sato, Mitsuru
Author_Institution :
Sony Corp., Tokyo, Japan
Abstract :
A novel optical image stabilizer was implemented on a consumer video camera. Novel feedback servo techniques were developed in order to control the nonlinear, unstable, variable fluid prism. As a result better frequency response was achieved. The system has the following features: (1) maintenance of picture resolution and (2) compensation for the fluctuation in optically zoomed pictures. When the new servo techniques are used, the prism´s control is stable regardless of the prism´s position and the temperature. These new techniques made it possible to develop an optical image stabilizing system whose stabilization rate is good
Keywords :
feedback; optical prisms; servomotors; telecommunications control; video cameras; consumer video camera; feedback servo; frequency response; optical image stabilizing system; picture resolution; prism control; stabilization rate; temperature; Cameras; Control systems; Fluctuations; Frequency response; Nonlinear optics; Optical control; Optical feedback; Optical variables control; Servomechanisms; Temperature control;
Journal_Title :
Consumer Electronics, IEEE Transactions on
