Photography – Camera shake sensing – Having stabilization system
Reexamination Certificate
2001-04-10
2003-02-25
Perkey, W. B. (Department: 2851)
Photography
Camera shake sensing
Having stabilization system
Reexamination Certificate
active
06526231
ABSTRACT:
This application claims benefit of Japanese Patent Applications Nos. 2000-114201 (filed in Japan on Apr. 14, 2000), 2000-114202 (filed in Japan on Apr. 14, 2000), 2000-114203 (filed in Japan on Apr. 14, 2000) and 2000-160297 (filed in Japan on May 30, 2000), the contents of which are incorporated by this reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tremble correction camera, and more particularly, to a tremble correction camera having a function for correcting a tremble derived from a photographer's hand tremble.
2. Description of the Related Art
In recent years, various technologies have been proposed for a camera capable of preventing degradation of quality of a pickup image caused by a photographer's hand tremble.
For example, there is the technology of warning a photographer of a hand tremble in a low-shutter speed mode that is prone to a hand tremble, or the technology of changing a shutter speed to a high shutter speed according to a program line. Moreover, there is the technology of detecting a degree of a hand tremble using an acceleration sensor or an angular speed sensor and starting opening and closing a shutter at a timing at which the hand tremble is minimized during exposure. Methods for actively correcting a tremble in an image responsively to detection of a hand tremble include a method of tilting a lens included in a taking optical system or displacing it in a direction orthogonal to the optical axis of the optical system so as to cancel a tremble in an image to thus stabilize a pickup image on film.
Cameras in which the method of tilting or displacing a lens included in a taking optical system include, for example, a camera disclosed in Japanese Patent No. 2605326 (Japanese Laid-open patent publication No. 1-191113). In the disclosed camera, a hand tremble is corrected by driving the last group of lenses included in the taking optical system in a direction perpendicular to the optical axis of the optical system.
Moreover, Japanese Laid-open patent publication No. 8-129198 discloses a camera that drives film in a direction perpendicular to the optical axis of an optical system so as to correct a hand tremble.
The camera disclosed in the Japanese Patent No. 2605326 (Japanese Laid-open patent publication No. 1-191113) has a hand tremble correcting mechanism included in a taking lens. Therefore, when the camera has various interchangeable taking lenses selectively attached to a camera body according to a photographic situation, a hand tremble correcting mechanism is needed for each of the interchangeable taking lenses. Moreover, a tremble detection sensor and a tremble correcting mechanism must be included in each taking lens. This leads to an increase in the size of a taking lens and an increase in the costs of the camera.
Moreover, the camera disclosed in the Japanese Laid-open patent publication No. 8-129198 drives film to correct a hand tremble. Therefore, when it comes to a single-lens reflex camera, the result of correction recognized in a pickup image cannot be checked through a viewfinder.
OBJECT OF THE INVENTION
To solve the foregoing inconvenience, it is considered that a camera having a tremble correcting function that makes it possible to check the result of correction through a viewfinder without inviting an increase in the size of a taking lens or an increase in costs.
SUMMARY OF THE INVENTION
A tremble correction camera of the present invention includes: a camera body; a taking lens attachable/detachable to/from the camera body; and a tremble correction optical system located near a dismounting/mounting member of the camera body in which the taking lens is mounted.
A tremble correction camera of the present invention includes: a camera body; a light path changing unit for changing a path of light that represents a pickup image through a taking optical system; and a tremble correction optical system located in front of the light path changing unit within the camera body.
A tremble correction camera of the present invention includes: a camera body having a main mirror and a mount in or from which a taking lens can be mounted or dismounted; a tremble correction optical system interposed between the main mirror and the mount, composed of optical members, and moved in order to correct a tremble; a driver for driving the tremble correction optical system; a first control unit incorporated in the camera body and controlling photography; a second control unit incorporated in the camera body and controlling the driver; a first detector for detecting whether the taking lens is attached to the camera body; and a second detector for detecting whether a tremble correction mode in which the tremble correction optical system is used to correct a tremble is set.
A tremble correction camera of the present invention includes: a detector for detecting a tremble of the camera; a correction optical system interposed between a mount, in or from which a taking lens can be mounted or dismounted, and a main mirror, and moved in order to correct a tremble according to the tremble detected by the detector; a judging unit for judging whether a focal length exhibited by the taking lens falls within a predetermined range; and a corrective movement restricting unit for restricting the corrective movement of the tremble correction optical system according to the result of judgment made by the judging unit.
A tremble correction camera of the present invention includes: a detector for detecting a tremble of the camera; a correction optical system interposed between a mount, in or from which a taking lens can be mounted or dismounted, and a main mirror, and moved in order to correct a tremble according to the tremble detected by the detector; and a corrective movement restricting unit for restricting the corrective movement of the tremble correction optical system according to a focal length exhibited by the taking lens.
A tremble correction camera of the present invention includes: a camera body having a main mirror and a mount in or from which a taking lens can be mounted or dismounted; a tremble correction optical system interposed between the main mirror and the mount, composed of optical members, and moved in order to correct a tremble; a driver for driving the tremble correction optical system; a first controller including a first judging unit that judges whether a focal length exhibited by the taking lens falls within a predetermined range, and controlling photography; and a second controller including a second judging unit that judges whether a focal length exhibited by the taking lens falls within a predetermined range, and controlling tremble correction.
A tremble correction camera of the present invention includes: a detector for detecting a tremble of the camera; a tremble correction optical system interposed between a mount, in or from which a taking lens can be mounted or dismounted, and a main mirror, and moved in order to correct a tremble according to the tremble detected by the detector; a lens change switch to be used to dismount the taking lens from the mount; a detector for detecting whether the taking lens is mounted in the mount; and a movement control unit for controlling the movement of the tremble correction optical system according to a change in the state of either the lens mounting detector or the lens change switch.
A tremble correction camera of the present invention includes: a detector for detecting a tremble of the camera; a tremble correction optical system interposed between a mount, in or from which a taking lens can be mounted or dismounted, and a main mirror, and moved in order to correct a tremble according to the tremble detected by the detector; a driver for driving the main mirror; and a movement control unit for when the driver drives the main mirror, controlling the movement of the tremble correction optical system.
REFERENCES:
patent: 5270857 (1993-12-01), Oizumi et al.
patent: 5655157 (1997-08-01), Enomoto
patent: 5794081 (1998-08-01), Itoh et al.
patent: 6183145 (2001-
Matsumoto Hisayuki
Sato Tatsuya
Olympus Optical Co,. Ltd.
Perkey W. B.
Pokotylo John C.
Straub & Pokotylo
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