JP2005284042A5 - - Google Patents

Claims (8)

An optical element;
A relative position detecting means for detecting a relative movement amount of the optical element ;
Origin detecting means for detecting an origin position for initializing the position of the optical element ;
Control means for calculating the absolute position of the optical element based on the outputs of the relative position detection means and the origin detection means and controlling the movement of the optical element;
An operating member for giving an instruction to move the optical element,
The first mode is set to a speed control method for controlling the speed of movement of the optical element according to an instruction from the operation member, and the position control method is used to position-control the movement of the optical element according to an instruction from the operation member. Has a second mode to be
The control means drives the optical element to a specific position in the first mode after the optical element is moved to the origin position after power-on and the initialization is completed, and in the second mode. A lens apparatus for driving the optical element based on a position command signal. 2. The lens apparatus according to claim 1, wherein the specific position is a position before initialization. The lens apparatus according to claim 1, wherein the specific position is a position different from a position before initialization. The absolute position signal of the optical element is not transmitted during initialization to a camera apparatus that can be connected to the lens and can receive position information of the optical element from the lens apparatus. Lens device. A signal indicating that the absolute position signal of the optical element is invalid during initialization is transmitted to the camera apparatus that can be connected to the lens and can receive position information of the optical element from the lens apparatus. The lens apparatus according to claim 1, wherein Storage means for storing the absolute position of the optical element before the power is turned off, and during initialization, the absolute position signal of the optical element stored before the power is turned off is transmitted to the camera device. Item 4. A lens device according to item 5. The lens device according to claim 1, wherein the optical element is a zoom lens, a focus lens, or an iris. An imaging device comprising the lens device according to claim 1 and a camera device connected to the lens device.