Camera-shake compensation apparatus and position detection apparatus

• US 20050259156A1
• Filed: 11/15/2004
• Published: 11/24/2005
• Est. Priority Date: 05/18/2004
• Status: Abandoned Application

• Current Assignee: Konica Minolta Photo Imaging Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta Photo Imaging Incorporated (Konica Minolta Inc.)
• Inventors: Masuda, Satoshi, Kosaka, Akira, Hara, Yoshihiro, Ishito, Fumiaki
• Application Number:
  US10/988,744
• Publication Number:
  US 20050259156A1
• Time in Patent Office: Days
• US Class Current: 348/208.700
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

A base plate, a first slider and a second slider are fit in one another to produce one assemblage. The first slider is caused to move relative to the base plate along an X axis by a first actuator. The second slider moves in unison with the first slider, and also is caused to solely move along a Y axis by a second actuator. A magnetic sensor unit is provided in the base plate, and a magnet support is provided in the second slider so as to face the magnetic sensor unit. A magnet is disposed on a lower face of the magnet support. The magnetic sensor unit and the magnet form a position detection mechanism, and the second slider in which the magnet is disposed requires no electric wiring.

Claims

1. A position detection apparatus comprising:

a fixed part;

a moving part movable relative to said fixed part along two differential axes in a predetermined plane through a first guide part and a second guide part; and

a detector for detecting a position of said moving part relative to said fixed part in said predetermined plane, wherein

said detector includes a plurality of magnetic-sensor groups which are arranged at one part of said fixed part and said moving part and a magnet which is arranged at the other part so as to face said plurality of magnetic-sensor groups, each of said plurality of magnetic-sensor groups including two magnetic sensors which is arranged in different directions in said predetermined plane, respectively.

2. The position detection apparatus according to claim 1, wherein

said plurality of magnetic-sensor groups are provided in said fixed part, and said magnet is provided in said moving part.

3. The position detection apparatus according to claim 1, wherein

in said detector, said plurality of magnetic-sensor groups are two magnetic-sensor groups which intersect each other at right angles to form a cross-shaped array, and said magnet is a single magnet which is situated so as to face an approximate center of said cross-shaped array formed by said two magnetic-sensor groups.

4. The position detection apparatus according to claim 3, wherein

one of said two magnetic-sensor groups extends substantially in a first movement direction in which said moving part moves through said first guide part, and the other of said two magnetic-sensor groups extends substantially in a second movement direction in which said moving part moves through said second guide part.

5. A camera-shake compensation apparatus comprising:

a fixed part secured to a lens barrel;

a moving part which holds an imaging device and is movable relative to said fixed part along two differential axes in a predetermined plane perpendicular to an optical axis through a first guide part and a second guide part; and

a detector for detecting a position of said moving part relative to said fixed part, wherein

said detector includes a plurality of magnetic-sensor groups which are arranged at one part of said fixed part and said moving part and a magnet which is arranged at the other part so as to face said plurality of magnetic-sensor groups, each of said plurality of magnetic-sensor groups including two magnetic sensors which is arranged in different directions in said predetermined plane, respectively.

6. The camera-shake compensation apparatus according to claim 5,

said plurality of magnetic-sensor groups are provided in said fixed part, and said magnet is provided in said moving part.

7. The camera-shake compensation apparatus according to claim 5, wherein

in said detector, said plurality of magnetic-sensor groups are two magnetic-sensor groups which intersect each other at right angles to form a cross-shaped array, and said magnet is a single magnet which is situated so as to face an approximate center of said cross-shaped array formed by said two magnetic-sensor groups.

8. The camera-shake compensation apparatus according to claim 7, wherein

one of said two magnetic-sensor groups extends substantially in a first movement direction in which said moving part moves through said first guide part, and the other of said two magnetic-sensor groups extends substantially in a second movement direction in which said moving part moves through said second guide part.