Photocopying – Contact printing – Light boxes
Patent
1993-08-27
1995-03-21
Rutledge, D.
Photocopying
Contact printing
Light boxes
354298, 354319, 354334, 355 22, 355 77, G03B 3500
Patent
active
054000963
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to a method of printing and development of three dimensional (henceforth referred to as 3D) photographs using sensitized lenticular sheets that are fabricated by applying a sensitized material on the reverse side of a lenticular sheet(henceforth referred to as LS). It also relates to print and development apparatuses of both the 3D and the conventional photographs.
BACKGROUND OF THE PRIOR ART
In three-dimensional (3D) photography where LS is used, "indirect methods" are common. In indirect methods, a camera that is loaded with a sensitized conventional film is horizontally displaced by fixed amounts with respect to the 3D object to make a number of negatives for the same single object. These negative films are such that they have the object images in the film at different positions in accordance with the distance to the object from the camera. Apart from this method of photographing where the camera is moved horizontally in straight lines, there are photograph methods where the camera is moved with respect to the object in an arc. In either of these methods, it is necessary to get several object images from different viewing points. Other than the camera being moved for photographing, it is also possible to make negatives with a camera that has several lenses arranged horizontally or with several horizontally placed cameras that operate simultaneously. As to the number of negatives required, there is no special fixed number; three to five negatives are common.
In the "indirect method," the multiple negatives obtained in the above mentioned process are each exposed, by having the projection angle varied for the each negative, onto a sensitized film containing LS that is fabricated by applying a sensitized material on the smooth side of an LS. When an image is developed on a sensitized film containing LS from a negative by an ordinary projection lens, the image projected onto the sensitized layer, which is on the back side of the lenticular lenses, will be divided at each lenticular lens into line images due to the fact that the lenticular lenses contract images sideways. As the next step in the process, the other negative in the order is used with the relative positions of the projection lens and the sensitized film containing LS changed and with the exposure done so that a new line image is developed next to the line image that was developed in the previous exposure. Likewise, the breadth of the reverse side of the lenticular lens is successively filled with line images from each negative. In that manner, it is possible to print images from several negatives onto a single sheet of sensitized material. This printing can even be done using several projection lenses, with a single exposure.
The LS with the print that was obtained as described above is then developed. When viewed from the side of the lenticular lenses, the line images formed on the sensitized layer are expanded again sideways and will be seen as a restored image. In addition, a viewer will see from its either eye a different image of what has been systematically photographed, the result of which is that the two images that the viewer sees become superimposed and the viewer will see a three dimensional image. The distance at which the photograph should be viewed for an excellent three dimensional view depends on the state in which the multiple images have been printed onto the sensitized sheet with LS. It is generally the case to make the three dimensional view visible best from a distance that is roughly the same as from the projecting lens to the sensitized sheet with LS at the time of printing.
As described above, 3D photography uses methods that are vastly different from those in the conventional photography with regard to the exposure process of printing, photographic printing material and development process, and therefore the 3D photography uses a special print and development apparatus that is different from those in use in the conventional photography. Moreover, manual operati
Itojima Mitsuhiko
Kamada Shigeharu
Miyawaki Hiroshi
Nagaosa Kazuo
Nakamura Yoshifumi
Noritsu Koki Co., Ltd.
Rutledge D.
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