Olympus Corporation

Rintaro Nishihara

Masanori Shimoyama

Takashi Ishikawa

Sho Nakamura

An endoscope system includes an endoscope having a position/angle sensor and an amplifying circuit, a memory configured to store output error sensitivity data and a first wiring resistance value, and a processor including a signal processing circuit configured to process an output signal from the amplifying circuit. The signal processing circuit corrects an error of the output signal based on a value obtained by multiplying a difference between the first wiring resistance value and a processor wiring resistance value by the output error sensitivity data.

Endoscope system, processor, calibration apparatus, and endoscope

An endoscope system includes an endoscope in which an actuator moves a movable lens and a position sensor outputs a position detection signal, and a processor including a driver circuit configured to drive the actuator and a driving control circuit configured to subject a deviation of the position detection signal to first correction based on individual processor correction data stored in a processor memory and controls the driver circuit based on a target position and the position detection signal subjected to the first correction.

Endoscope system, processor, and endoscope

A position detection apparatus is configured to detect a position of a movable portion relative to a fixed portion using a voice coil motor (VCM) driving portion. The position detection apparatus includes a position detection element arranged on one of the movable portion and the fixed portion, and a first position detection magnet and a second position detection magnet arranged on another of the movable portion and the fixed portion. The first position detection magnet and the second position detection magnet are aligned so that different magnetic poles face a surface of the position detection element. The first position detection magnet and the second position detection magnet are arranged in an order in a moving direction of the movable portion such that magnitudes of densities of magnetic fluxes reaching the surface of the position detection element from the first position detection magnet and the second position detection magnet are different.

Image stabilization device

An image stabilization device includes a movable portion including an image pickup lens and a VCM driving portion configured to drive the movable portion relative to a fixed portion, the image stabilization device including: a position detection element arranged on the movable portion; and paired position detection magnets arranged at positions facing the position detection element and arranged on the fixed portion; wherein the paired position detection magnets are a first magnet and a second magnet arranged so that different magnetic poles face a surface of the position detection element; the first magnet and the second magnet are arranged in order along a direction away from an optical axis of a light flux incident on the image pickup lens; and magnitudes of densities of magnetic fluxes reaching the surface of the position detection element from the first magnet and the second magnet, respectively, are mutually different.

An imaging apparatus includes a camera shake correction unit which uses a coil and a magnet to move a movable portion including an image pickup device relative to a fixed portion. A position detection section detects the position of the movable portion. A setting section sets a resolving power of the detection of the position by the position detection section to a first or second resolving power which is a resolving power higher than the first resolving power and at which an amount of deviation from a target position is less than or equal to a pixel shift amount. A drive control section performs pixel shifts to move the movable portion with the second resolving power set by the setting section. A photography control section causes the image pickup device to perform exposures by timing of the pixel shifting and which composes images obtained by the exposures.

Imaging apparatus capable of detecting position of movable image pickup device at first resolving power and at second resolving power higher than first resolving power and, at which second resolving power, deviation amount is less than or equal to pixel shift amount

The invention provides a position detection apparatus comprising:

Position detection apparatus and position control apparatus

The invention disclosed herein provides a small-format image-shake correction apparatus and an imaging apparatus incorporating the same. The moving member control apparatus is comprising a base part, a moving partthat is movable relatively to the base part, a first driving partthat applies an driving force to the moving part, a second driving partthat applies an driving force to the moving part, a third driving partthat applies an driving force to the moving partfrom a position different from the firstand the second driving part, a control partthat gains control of the driving forces of the first, the secondand the third driving part, and a correction partthat makes correction of a first output value Iproduced from the control partto the first driving partand a second output value Iproduced from the control partto the second driving part, depending on a third output value Iproduced from the control partto the third driving part, as shown in FIG.

Moving member control apparatus and imaging apparatus incorporating the same

The present invention relates to a moving member control apparatus that makes sure unerring control of a moving member having an ill-balanced structure and an imaging apparatus that incorporates that control apparatus.

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Tokyo, Japan

Rintaro Nishihara