Photography – Camera shake sensing – With photoarray
Reexamination Certificate
2000-01-28
2001-10-02
Perkey, W. B. (Department: 2851)
Photography
Camera shake sensing
With photoarray
C396S287000, C396S374000
Reexamination Certificate
active
06298198
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATIONS
Reference is made to commonly assigned co-pending U.S. Patent applications Ser. No. 09/491,813, entitled: VERIFYING CAMERA HAVING FOCUS INDICATOR AND METHOD, and filed in the name of Stephen G. Malloy-Desormeaux; Ser. No. 09/493,787, entitled: VERIFYING CAMERA WITH DEMONSTRATION MODE AND METHOD, and filed in the names of Stephen G. Malloy-Desormeaux, Robert Hills, and David L. Funston; Ser. No. 02/117,761, entitled: VERIFYING FLASH CAMERA, and filed in the name of Frederick J. Reber.
FIELD OF THE INVENTION
The invention relates to photography and electronic-film cameras and more particularly relates to a motion verifying camera and motion verifying photography method.
BACKGROUND OF THE INVENTION
Verifying cameras are a type of hybrid film-electronic camera in which the user has an opportunity to check captured film images immediately after capture using a concurrently recorded electronic image. A shortcoming of such cameras is that the exposure times required for the film and electronic array imager are seldom the same. The exposure time for the electronic array imager is often much shorter than the exposure time required for the film. In many cases, this shorter exposure time “stops” a motion of the camera or photographic subject that is recorded on the film as a blur. As a result, the captured electronic image is not fully accurate for verification purposes.
It would thus be desirable to provide an improved verifying camera and method in which relative motion blur can be more accurately verified.
SUMMARY OF THE INVENTION
The invention is defined by the claims. The invention, in its broader aspects, provides a camera and motion verifying photography method. In the method a latent image is captured during a film exposure time interval. The film exposure time interval has an initial portion, a middle portion, and a final portion. A first digital image is captured during the initial portion of the film exposure time interval. A second digital image is captured during the final portion of the film exposure time interval. A representation of both electronic images is visualized. The motion verifying camera has an exposure frame, an electronic array imager spaced from the exposure frame, an optical system directing light along a first path to the exposure frame and along a second path to the imager. Shutters are disposed on both paths. A shutter release connects to an actuator and responsive to the actuator, momentarily opens the film shutter for a film exposure time interval having an initial portion, a middle portion, and a final portion. The actuator momentarily opens the imager shutter during the initial portion and momentarily opens the imager shutter during the final portion.
It is an advantageous effect the invention that an improved verifying camera and method are provided in which relative motion blur can be more accurately verified.
REFERENCES:
patent: 4527053 (1985-07-01), Kinoshita et al.
patent: 4673276 (1987-06-01), Yoshida et al.
patent: 4862277 (1989-08-01), Iwaibana
patent: 5060007 (1991-10-01), Egawa
patent: 5164836 (1992-11-01), Jackson et al.
patent: 5781806 (1998-07-01), Satoh et al.
Funston David L.
Hoshikawa Hisanori
Ina Hirohiko
Eastman Kodak Company
Perkey W. B.
Walker Robert Luke
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