Optics: motion pictures – Stereoscopic cameras and/or projectors – Simultaneous recording or reproducing left-right images
Patent
1983-06-23
1986-06-24
Hayes, Monroe H.
Optics: motion pictures
Stereoscopic cameras and/or projectors
Simultaneous recording or reproducing left-right images
352198, G03B 2118
Patent
active
045964513
ABSTRACT:
In a 3D motion picture projection system using polarized light, a light source and a reflector for imaging a convergent beam of light onto a film gate, a film with right and left stereo images at the gate, and means for projecting, polarizing and overlapping said stereo images onto a metallized screen; the improvement comprising an optical device for pre-polarizing the convergent light beam, a double refracting crystal located to transmit the convergent light beam, whereby two adjacent orthogonally polarized images, respectively vertical and horizontal, are placed onto the said right and left stereo images at the film gate with substantially no light loss; and polarized viewers having orthogonally polarized filters with their polarizing axes respectively vertical and horizontal, worn by the observer to separate the 3D images, whereby the light efficiency of the system is doubled.
REFERENCES:
patent: 1503766 (1924-08-01), Pictet et al.
patent: 2821114 (1958-01-01), Wiemer et al.
patent: 3263070 (1966-07-01), Hine
patent: 3302517 (1967-02-01), Henkel
patent: 3308715 (1967-03-01), Ashcraft
patent: 4372656 (1983-02-01), Marks et al.
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