Camera having blurring movement correction mechanism

• US 5,192,964 A
• Filed: 03/04/1992
• Issued: 03/09/1993
• Est. Priority Date: 03/04/1991
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Shinohara, Junichi, Serikawa, Yoshio, Ohno, Yoshimi, Nishida, Tohru
• Primary Examiner(s): PERKEY, WILLIAM B
• Application Number:
  US07/847,759
• Time in Patent Office: 370 Days
• Field of Search: 354/430, 354/70, 354/202, 354/295, 358/222, 359/554
• US Class Current: 396/55
• CPC Class Codes: G03B 2217/005 Blur detection
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

A camera having blurring movement correction mechanism comprising: an optical element arranged to correct shift of an image formed on a film surface caused by movement of hands holding a camera body; an actuator for moving the optical element in a necessary direction for correcting the image shift; a detection unit for obtaining a blurring movement detection data by converting the movement of the camera body to an electric signal; a first memory unit for temporarily registering the detection data output from the detection unit; a calculation unit for calculating blurring movement correction data for correcting the image shift caused by movement of the camera body by actuating the optical element by the actuator; and a second memory unit for temporarily registering data of calculation. The correction data is predictively calculated from the detection data of this time obtained from the detection unit, the detection data of the preceding time registered in the first memory unit and the correction data of the preceding time registered in the second memory unit.

Claims

1. A camera having blurring movement correction mechanism comprising:

a blurring movement correction optical element disposed in an optical path of a photo-taking optical system so as to correct shift of an image formed on a film surface caused by movement of hands holding a camera body;

a blurring movement correction actuator for moving said optical element in a necessary direction for correcting said shift of the image on the film surface;

a blurring movement detection unit for obtaining a blurring movement detection data by converting said blurring movement of said camera body to an electric signal;

a first memory means for temporarily registering said detection data output from said detection unit;

a calculation means for calculating blurring movement correction data for correcting said shift of the image formed on the film surface caused by movement of hands holding the camera body by actuating said optical element by said actuator; and

a second memory means for temporarily registering an output data of calculation from said calculation means,

said calculation means being so constructed that said blurring movement correction data is predictively calculated on the basis of said detection data of this time obtained from said detection unit, said detection data of the preceding time registered in said first memory means and said correction data of the preceding time registered in said second memory means so as to correct said shift of the image formed on the film surface by actuating said optical element by said actuator.

3. A camera having blurring movement correction mechanism according to claim 1, wherein said detection unit is so constructed that acceleration generated in the camera body is detected and that the detected data are integrated for a predetermined integration time so as to generate said blurring movement detection data.

9. A camera having blurring movement correction mechanism according to claim 1, wherein velocity of said blurring movement is detected at a plurality of timing points so that predictive velocity at a timing point after predetermined time elapsed is calculated on the basis of the plurality of detected velocity data.

10. A camera having blurring movement correction mechanism according to claim 9, wherein said predictive velocity is calculated on the basis of linear approximately method.

2. A camera having blurring movement correction mechanism comprising:

a blurring movement correction optical element disposed in an optical path of a photo-taking optical system so as to correct shift of an image formed on a film surface caused by movement of hands holding a camera body;

a blurring movement correction actuator for moving said optical element in a necessary direction for correcting said shift of the image on the film surface;

a blurring movement detection unit for obtaining a blurring movement detection data by converting said blurring movement of said camera body to an electric signal;

a first memory means for temporarily registering said detection data output from said detection unit;

a calculation means for calculating blurring movement correction data for correcting said shift of the image formed on the film surface caused by movement of hands holding the camera body by actuating said optical element by said actuator; and

a second memory means for temporarily registering an output data of calculation from said calculation means,

said calculation means being so constructed that said blurring movement correction data is predictively calculated on the basis of said detection data of this time obtained from said detection unit, said detection data of the preceding time and the preceding time of the preceding time registered in said first memory means and said correction data of the preceding time registered in said second memory means so as to correct said shift of the image formed on the film surface by actuating said optical element by said actuator next time.

4. A camera having blurring movement correction mechanism according to claim 2, wherein said detection unit is so constructed that acceleration generated in the camera body is detected and that the detected data are integrated for a predetermined integration time so as to generate said blurring movement detection data.

11. A camera having blurring movement correction mechanism according to claim 2, wherein velocity of said blurring movement is detected at a plurality of timing points so that predictive velocity at a timing point after a predetermined time elapsed is calculated on the basis of the plurality of detected velocity data.

12. A camera having blurring movement correction mechanism according to claim 11, wherein said predictive velocity is calculated on the basis of linear approximation method.

5. A camera having blurring movement correction mechanism comprising:

a blurring movement correction optical element disposed in an optical path of a variable focal length photo-taking optical system so as to correct shift of an image formed on a film surface caused by movement of hands holding a camera body;

a blurring movement correction actuator for moving said optical element in a necessary direction for correcting said shift of the image on the film surface;

a blurring movement detection unit for obtaining a blurring movement detection data by converting said blurring movement of said camera body to an electric signal;

a first memory means for temporarily registering said detection data output from said detection unit;

a zoom position detection means for obtaining a zoom position data by detecting focal length of said photo-taking optical system;

a calculation means for calculating blurring movement correction data for correcting said shift of the image formed on the film surface caused by movement of hands holding the camera body by actuating said optical element by said actuator; and

a second memory means for temporarily registering an output data of calculation from said calculation means,

said calculation means being so constructed that said blurring movement correction data is predictively calculated on the basis of said detection data of this time obtained from said detection unit, said detection data of the preceding time registered in said first memory means and said correction data of the preceding time registered in said second memory means so as to correct said shift of the image formed on the film surface by actuating said optical element by said actuator and as well that said correction data is corrected on the basis of the focal length in response to said zoom position detection data obtained from said zoom position detection means.

6. A camera having blurring movement correction mechanism comprising:

a blurring movement correction optical element disposed in an optical path of a variable focal length photo-taking optical system so as to correct shift of an image formed on a film surface caused by movement of hands holding a camera body;

a blurring movement correction actuator for moving said optical element in a necessary direction for correcting said shift of the image on the film surface;

a blurring movement detection unit for obtaining a blurring movement detection data by converting said blurring movement of said camera body to an electric signal;

a first memory means for temporarily registering said detection data output from said detection unit;

a zoom position detection means for obtaining a zoom position data by detecting focal length of said photo-taking optical system;

a calculation means for calculating blurring movement correction data for correcting said shift of the image formed on the film surface caused by movement of hands holding the camera body by actuating said optical element by said actuator; and

a second memory means for temporarily registering an output data of calculation from said calculation means,

said calculation means being so constructed that said blurring movement correction data is predictively calculated on the basis of said detection data of this time obtained from said detection unit, said detection data of the preceding time and the preceding time of the preceding time registered in said first memory means and said correction data of the preceding time registered in said second memory means so as to correct said shift of the image formed on the film surface by actuating said optical element by said actuator next time and as well that said correction data is corrected on the basis of the focal length in response to said zoom position detection data obtained from said zoom position detection means.

7. A camera having blurring movement correction mechanism comprising:

a blurring movement correction optical element disposed in an optical path of a photo-taking optical system so as to correct shift of an image formed on a film surface caused by movement of hands holding a camera body;

a blurring movement correction actuator for moving said optical element in a necessary direction for correcting said shift of the image on the film surface;

a blurring movement detection unit for obtaining a blurring movement detection data by converting said blurring movement of said camera body to an electric signal;

a first memory means for temporarily registering said detection data output from said detection unit;

a distance measurement means for obtaining subject distance data by measuring the distance to the subject;

a calculation means for calculating blurring movement correction data for correcting said shift of the image formed on the film surface caused by movement of hands holding the camera body by actuating said optical element by said actuator; and

a second memory means for temporarily registering an output data of calculation from said calculation means,

said calculation means being so constructed that said blurring movement correction data is predictively calculated on the basis of said detection data of this time obtained from said detection unit, said detection data of the preceding time registered in said first memory means and said correction data of the preceding time registered in said second memory means so as to correct said shift of the image formed on the film surface by actuating said optical element by said actuator and as well that said correction data is corrected in response to said subject distance data obtained from said distance measurement means.

8. A camera having blurring movement correction mechanism comprising:

a blurring movement correction optical element disposed in an optical path of a photo-taking optical system so as to correct shift of an image formed on a film surface caused by movement of hands holding a camera body;

a blurring movement correction actuator for moving said optical element in a necessary direction for correcting said shift of the image on the film surface;

a blurring movement detection unit for obtaining a blurring movement detection data by converting said blurring movement of said camera body to an electric signal;

a first memory means for temporarily registering said detection data output from said detection unit;

a distance measurement means for obtaining subject distance data by measuring the distance to the subject;

a calculation means for calculating blurring movement correction data for correcting said shift of the image formed on the film surface caused by movement of hands holding the camera body by actuating said optical element by said actuator; and

a second memory means for temporarily registering an output data of calculation from said calculation means,

said calculation means being so constructed that said blurring movement correction data is predictively calculated on the basis of said detection data of this time obtained from said detection unit, said detection data of the preceding time and the preceding time of the preceding time registered in said first memory means and said correction data of the preceding time registered in said second memory means so as to correct said shift of the image formed on the film surface by actuating said optical element by said actuator next time and as well that said correction data is corrected in response to said subject distance data obtained from said distance measurement means.