Camera having blurring correction apparatus

• US 5,353,091 A
• Filed: 04/16/1993
• Issued: 10/04/1994
• Est. Priority Date: 06/21/1989
• Status: Expired due to Term

• Current Assignee: Minolta Camera Kabushiki Kaisha
• Original Assignee: Minolta Camera Kabushiki Kaisha
• Inventors: Yamakawa, Eiji, Okada, Takashi, Hamada, Masataka, Katoh, Takehiro, Ootsuka, Hiroshi, Mukai, Hiromu, Masumoto, Hisayuki, Ishida, Tokuji
• Primary Examiner(s): Perkey, W. B.
• Application Number:
  US08/046,741
• Time in Patent Office: 536 Days
• Field of Search: 354/430, 354/202, 354/402, 354/410
• US Class Current: 396/55
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G03B 15/03 Combinations of cameras with lighting apparatus; Flash units
• CPC Class Codes: G03B 2217/005 Blur detection
• CPC Class Codes: G03B 2217/007 Details of energy supply or management
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: G03B 7/093 for control of exposure time

Abstract

A camera having a blurring correction apparatus according to the present invention includes a photographic lens for forming an image of an object to be photographed, a detecting apparatus for detecting the degree of movement of the formed image of the object, a correcting apparatus operative at least during exposure time for correcting the position of the image of the object in response to a detection output of the detecting apparatus so as to compensate the movement of the image of the object, a setting apparatus for setting exposure time, a calculating apparatus for calculating the amount of movement of the image of the object produced during exposure time based on the detection output of the detecting apparatus and the set exposure time, and a prohibiting apparatus for prohibiting the operation of the correcting apparatus when the amount of movement of the image of the object produced during exposure time is smaller than a predetermined value.

Claims

1. An interchangeable lens that can be interchangeably mounted on a camera body which is capable of detecting a degree of movement of an object image in a direction perpendicular to an optical axis of the lens, said lens comprising:

an optical system operable to compensate the movement of the object image in a direction perpendicular to the optical axis of the lens;

means for driving said optical system so as to compensate the movement of the object image; and

means for controlling said driving means by means of a pulse signal.

2. The interchangeable lens according to claim 1, wherein said driving means is a pulse motor.

3. The camera according to claim 1, wherein said controlling means operates during an exposure time.

4. The camera according to claim 1, wherein said optical system has an optical element which is movable to keep the object image stable.

5. A camera comprising:

means for detecting a degree of movement of an object image in a direction perpendicular to an optical axis of the camera, wherein said detecting means detects the degree of movement during an exposure time;

an optical system operable to compensate the movement of the object image in a direction perpendicular to the optical axis of the lens;

means for driving said optical system so as to compensate the movement of the object image; and

means, operable during the exposure time, for controlling said driving means by means of a pulse signal.

6. The camera according to claim 5, wherein said driving means is a pulse motor.

7. The camera according to claim 5, wherein said optical system is an interchangeable lens that can be interchangeably mounted on a camera body and said driving means is mounted on the interchangeable lens.

8. The camera according to claim 5, wherein said optical system has an optical element which is movable to keep the object image stable.