Patent ID: 6822688
Filing Date: 2004-11-23
Classification: G02B,H04N

Abstract:
An optical apparatus having an image-forming optical system comprising a movable lens, said optical apparatus comprising:a manual operation member for being manually operated externally and for outputting an operation signal in accordance with a manual operation thereof; a lens drive mechanism for moving said movable lens in accordance with the operation signal from said manual operation member; a condition detecting device for detecting a temperature change or a humidity change of said optical apparatus and for outputting a state detection signal; a determining device for determining whether said manual operation member outputs the operation signal; and a control device for setting, when said determining device determines that said manual operation member does not output the operation signal, a correction amount of said movable lens in accordance with the state detection signal and for actuating said lens drive mechanism so as to move said movable lens for correction. wherein said control device memorizes the state detection signal from said condition detecting device in a case that said determining device determines that said manual operation member does not output the operation signal, and compares a memorized state detection signal with a current state detection signal from said condition detecting device so as to set the correction amount of said movable lens in accordance with a signal variation obtained by a comparison of the state detection signals.