Patent ID: 6023589
Filing Date: 2000-02-08
Classification: G02B

Abstract:
An optical apparatus for forming an object image on an image forming plane by using an optical system including a moving lens group for focus adjustment, said optical apparatus comprising:a lens driving mechanism which drives said moving lens group;a control circuit which drives and controls said lens driving mechanism on the basis of control information provided for driving and controlling said moving lens group; andtemperature detecting means for detecting information on temperature,wherein said control circuit computes a correction amount by which a driving limit of said moving lens group toward a nearest-distance end or infinity-distance end for focus adjustment is variable, according to a temperature detection output of said temperature detecting means, and drives and controls said lens driving mechanism on the basis of the correction amount and the control information, so that the object image can be formed on the image forming plane of said optical system without shifting due to variations of temperature.