Photocopying – Projection printing and copying cameras – Stereoscopic
Patent
1994-05-17
1996-03-26
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Stereoscopic
355 50, G03B 2732, G03B 3514, G03B 3524
Patent
active
055025404
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a printing/developing apparatus for normal photographs or 3D stereoscopic photographs using a lenticular sheet. In particular, the present invention relates to a mechanism for transporting printing paper used in a printing/developing apparatus in which a exposure stage or an lens unit is movably disposed with respect to a negative mask.
BACKGROUND ART
As a common method of preparing 3D stereoscopic photographs using a lenticular sheet, an indirect method is generally employed. In this method, a deep focused object is photographed with a camera charged with a normal film while the camera is moved horizontally or arcuately by a predetermined distance to prepare a plurality of negatives which contain images photographed with different angles. In these negatives, the position of images is shifted with each other in accordance with the distance between the camera and the object. Instead of taking photographs while a camera is moved, it is also possible to use a camera which contains a plurality of lenses aligned horizontally or a plurality of horizontally disposed cameras, to effect a simultaneous photographing to obtain a plurality of negatives. Although the number of the negatives is not particularly limited, it is generally 3 to 5.
In the indirect method, a plurality of negatives obtained as above are exposed on a photosensitive sheet composed of a lenticular sheet and a sensitized material applied onto the flat face of the lenticular sheet. The exposure is conducted in such a manner that the negatives are exposed by the use of an ordinary projection lens but with different projection angles to form images on the photosensitive sheet. When an image of a negative is projected onto the photosensitive sheet, the image is divided parallel to the axis of the lenticular lenses in the photosensitive sheet and compressed into a line. The projected image forms discrete and compressed line images on the sensitized layer of the back face of the lenticular lens sheet. Thereafter, the next adjacent negative is exposed under the condition where the relative position between the projection lens and photosensitive sheet is changed so as to form a new line image juxtaposed with the previously formed line image. This process is repeated to fill the entire back face of the lenticular lenses widthwise with line images originated from different negatives. Thus, images of a plurality of negatives can be printed on a piece of photosensitive sheet. A plurality of exposures may be simultaneously conducted using a multiple projection lenses.
When the exposed photosensitive sheet is developed and looked at from the lenticular lenses' side, the line images formed in the sensitized layer are enlarged widthwise so that we can see a restored image. If a person looks at the developed lenticular sheet at a specific distance from his or her eyes, the right and the left eyes can receive different images adjacent to each other, and the two separate pieces of visual information are combined in his or her brain to achieve a stereoscopic viewing.
As described above, in order to obtain a single stereoscopic photograph, a plurality of exposures are required while changing the projection angle. FIG. 1 shows a perspective view of a conventional printing/developing apparatus for 3D stereoscopic photographs. A required projection angle is obtained by a movably disposed exposure stage and a movably disposed lens unit. To secure free movement of the exposure stage and the lens unit, a rolled printing paper conveyed by a set of rollers is first cut into pieces of sheet by a cutter and then fed to the exposure stage. Paper chips generated at the time of cutting of the roll paper may have a detrimental effect on exposure, and therefore, they are eliminated by vacuum or the like. Thus, the cutting section for a rolled printing paper comprises a cutter and a paper chips disposing unit.
In the processing of 3D stereoscopic photographs, sheets of printing paper are manually developed by the use of a printing/
REFERENCES:
patent: 3689149 (1972-09-01), Livingood
patent: 4837601 (1989-06-01), Nakane et al.
patent: 4918483 (1990-04-01), Otake
patent: 4963919 (1990-10-01), Matsumoto et al.
Miyawaki Hiroshi
Oka Takayuki
Tsuji Masaaki
Braun Fred L.
Noritsu Koki Co., Ltd.
LandOfFree
Printing/developing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Printing/developing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Printing/developing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-920072