from the warranty, we know these camaras were made by WonderView Optical Industries Of Canada Ltd,
google the "WonderView Optical Industries Of Canada Ltd", I have found out that:
the patent about these cameras:
http://ip.com/patent/CA1062523A#
Canadian Patent Publication (Source: CIPO)
Publication No. CA 1062523 A published on 18-Sep-1979
Application No. CA 242190
Title (French)
Appareil photographique pour l'Enregistrement d'Images tridimensionnelles
Abstract (English)
ABSTRACT OF THE DISCLOSURE The present invention provides a photographic apparatus for use in obtaining a three dimensional picture including a dia- phragm aperture adapted to be moved transversely of the optical axis of an objective, a shielding curtain adapted to be operated by a pair of drums, said diaphragm aperture being mounted on said shielding curtain, said drums being arranged to be driven by a first motor, a lenticular screen located in and arranged to slide along the focal plane of said objective, and a second motor arranged to drive said lenticular screen, said first motor being electrically associated through a shutter button with said second motor so that the lenticular screen may be moved by said second motor over a pitch characteristic of said screen in synchronism with said diaphragm aperture moving within a photographic beam passing through said objective.
Inventors
YIN, LAW C.
Assignees
WONDERVIEW OPTICAL INDUSTRIES OF CANADA LTD.
Classifications
International (2006.01): G03B 35/00; G03B 35/04
National: 95/1
Notices
Grant issued: 18-Sep-1979
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http://www.seravia.com/trademark/ca...ndustries+Of+Canada+Ltd&cd=1&hl=zh-CN&ct=clnk