US 4,056,316 A · Method and apparatus for making a print of an object

Abstract

A method of making a print of an object, photographed by a stereo camera to provide first and second stereo transparencies thereof, comprises copying one of the first and second transparencies to prepare a third transparency. The first transparency and the third transparency are optically superimposed on each other to provide a first combination of light. A line screen negative is prepared having a plurality of black lines of equal thickness in parallel relation equidistantly spaced from each other by clear lines equal in thickness to the black lines. Photosensitive material is exposed to the first combination of light via the line screen negative to provide a first exposure. The second transparency and the third transparency are optically superimposed on each other to provide a second combination of light. The line screen negative is shifted in position by the thickness of a black line thereof on the first exposure. The photosensitive material is re-exposed to the second combination of light via the shifted line screen negative to expose the lines of the first exposure covered by the black lines of the negative in providing the first exposure to provide a complete exposure. The complete exposure is printed as a single print. The print is lenticulated whereby it appears to be three-dimensional to a human eye.

Claims9

Dependent claims

A method of making a print of an object, photographed by a stereo camera to provide first and second stereo transparencies thereof, which print appears to the human eye to be three-dimensional, said method comprising the steps of

copying one of the first and second transparencies to prepare a third transparency;
optically superimposing the first transparency provided by the stereo camera and the third transparency on each other to provide a first combination of light;
preparing a line screen negative having a plurality of black lines of equal thickness in parallel relation equidistantly spaced from each other by clear lines equal in thickness to the black lines;
exposing photosensitive material to the first combination of light via the line screen negative to provide a first exposure;
optically superimposing the second transparency provided by the stereo camera and the third transparency on each other to provide a second combination of light;
shifting the line screen negative in position by the thickness of a black line thereof on the first exposure;
re-exposing the photosensitive material to the second combination of light via the shifted line screen negative to expose the line of the first exposure covered by the black lines of the negative in providing the first exposure to provide a complete exposure;
printing the complete exposure as a single print;
and
lenticulating the print whereby it appears to be three-dimensional to a human eye.

7 more elements

Apparatus for making a print of an object, photographed by a stereo camera to provide first and second stereo transparencies thereof, which print appears to the human eye to be three-dimensional, said apparatus comprising

a third transparency which is a copy of one of the first and second transparencies;
optical means for first superimposing the first transparency provided by the stereo camera and the third transparency on each other to provide a first combination of light and for then superimposing the second transparency provided by the stereo camera and the third transparency on each other to provide a second combination of light;
a line screen negative having a plurality of black lines of equal thickness in parallel relation equidistantly spaced from each other by clear lines equal in thickness to the black lines;
viewing means for viewing the transparencies in the optical means to permit selective positioning thereof to insure exact superimposition thereof;
positioning means for first exposing photosensitive material to the first combination of light via the line screen negative to provide a first exposure and for then shifting the line screen negative in position by the thickness of a black line thereof on the first exposure, and re-exposing the photosensitive material to the second combination of light via the shifted line screen negative to expose the lines of the first exposure covered by the black lines of the negative in providing the first exposure to provide a complete exposure;
printing means for printing the complete exposure as a single print;
and
lenticular means on the print whereby it appears to be three-dimensional to a human eye.

5 more elements

Dependencies are inferred from the claim text.

Method and apparatus for making a print of an object

Life of this patent

Method and apparatus for making a print of an object

Life of this patent

Abstract

Claims9