JP2007147680A5 - - Google Patents

Claims (10)

A position having an actuator for moving an object, position detection means for detecting the position of the object, and reference position detection means for detecting a reference position serving as a reference of position information that is an output of the position detection means In the control device,
The reference position detection means detects the reference position by moving the object within a movable range at a first speed using the actuator, and moves the object again to the reference position at a second speed. A position control device for redetecting a reference position. The amount of movement of the object from one end position of the movable range to the reference position is measured, and when the amount of movement is outside the predetermined range, the reference position detection unit is again set to the reference position. 2. The position control device according to claim 1, further comprising re-initialization control means for performing a position detection operation. It has warning means for measuring the amount of movement of the object from one end position of the movable range to the reference position and giving a warning when the amount of movement is outside the predetermined range. The position control device according to claim 1. The reference position detecting means moves the object from one end position to the other end position of the movable range when moving the object in the movable range at the first speed, and then moves the second object to the second position. The position control device according to claim 1, wherein the reference position is re-detected at a speed. 2. The position control device according to claim 1, wherein when the reference position is detected by the reference position detection unit, a movement range at the second speed is narrower than a movement range at the first speed. A lens group movable in the optical axis direction, an actuator for moving the lens group in the optical axis direction, position detection means for detecting the position of the lens group, and position information as an output of the position detection means In an optical apparatus having a reference position detecting means for detecting a reference position serving as a reference of
The reference position detection means detects the reference position by moving the object within a movable range at a first speed using the actuator, and moves the object again to the reference position at a second speed. An optical apparatus characterized by re-detecting a reference position. The amount of movement from one end position of the movable range to the reference position is measured, and if the amount of movement is outside the predetermined range, the reference position detecting means is again subjected to the reference position detecting operation. The optical apparatus according to claim 6, further comprising a reinitialization control unit. 7. The apparatus according to claim 6, further comprising a warning unit that measures a movement amount from one end position of the movable range to a reference position and warns when the movement amount is out of a predetermined range. The optical instrument described. The reference position detecting means moves the object from one end position to the other end position of the movable range when moving the object in the movable range at the first speed, and then moves the second object to the second position. The optical apparatus according to claim 6, wherein the reference position is detected again at a speed. The optical apparatus according to claim 6, wherein when the reference position is detected by the reference position detection unit, a moving range at the second speed is narrower than a moving range at the first speed.