Optics: motion pictures – Optical rectifier type
Patent
1976-09-09
1978-09-12
Hayes, Monroe H.
Optics: motion pictures
Optical rectifier type
352106, 352108, 352111, G03B 4102
Patent
active
041133676
ABSTRACT:
The present invention provides a multifaceted reflecting polygon scanner system that is suitable for incorporation into a projector, camera, or other optical scanning or image immobilizing apparatus. The rotating reflecting optical system of the present invention, is capable of being combined with a continuous film transport to produce an overlap frame dissolve of sequential frames for optical immobilization of a projected image. The present invention includes a primary roof reflecting polygon, a secondary reflecting polygon, and an image surface. By proper choice of the polygon parameters and their juxtaposition relative to the image surface, the present invention uniquely provides a significantly higher relative aperture with minimal kinetic aberrations such as dynamic keystone distortion and minimal static aberrations. In one embodiment, a pair of roof reflectors of a 60.degree. and 90.degree. included angle prevent the generation of ghost images while providing an aberration free image with an isotransport film motion. When incorporated into a projection system, a projection lens having low geometric distortion and a long back focal length can be utilized wih the optical scanning system. The exact form of the projection lens would depend upon the particular adaptation of the reflecting polygon scanning system.
REFERENCES:
patent: 1154835 (1915-09-01), Bauersfeld
patent: 1937378 (1933-11-01), Alexanderson
patent: 2163543 (1939-06-01), Clothier et al.
patent: 2666357 (1954-01-01), Graham et al.
Fritzler Ulrich M.
Hayes Monroe H.
Jackson Harold L.
Jones Stanley R.
Price Joseph W.
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