# US 5,353,091 A · Camera having blurring correction apparatus

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- Number: US 5,353,091 A
- Document ID: US5353091A
- Status: Granted
- Kind: A
- Application number: 08/046,741
- Filed: 1993-04-16
- Granted: 1994-10-04
- Earliest claimed: 1989-06-21
- Assignees: Minolta Camera Kabushiki Kaisha
- Inventors: Tokuji Ishida; Masataka Hamada; Eiji Yamakawa; Hiromu Mukai; Hisayuki Masumoto; Takashi Okada; Takehiro Katoh; Hiroshi Ootsuka
- Web page: https://patentgrep.com/patent/US5353091A

## CPC

- G03B 15/03: Combinations of cameras with lighting apparatus; Flash units
- 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)}
- G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing
- G03B 7/093: for control of exposure time
- G03B 2217/005: Blur detection
- G03B 2217/007: Details of energy supply or management
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## 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

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

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

### Claim 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.

### Claim 6 (depends on 5)

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

### Claim 7 (depends on 5)

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.

### Claim 8 (depends on 5)

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