Cineconversion machine

Details Cineconversion machine Cineconversion machine

1975-09-16

1977-07-12

Hayes, Monroe H.

Optics: motion pictures

Special effects

352 87, 352 89, G03B 2132

Patent

active

040350673

ABSTRACT:
To record a composite picture on a film, a projection objective inserted between a movable transparency support and a pair of large-diameter planoconvex field lenses produces an aerial image of a slide, mounted on the support, in the region of the field lenses, preferably just beyond the more rearwardly positioned field lens. A varifocal objective disposed to the rear of the field lenses has a stationary front component with a natural entrance pupil fully illuminated by the diverging light cones from all the points of the aerial image, this varifocal objective forming part of a zoom camera enabling the magnification ratio between the slide and its image on the camera film to be varied in a range of at least 6:1.

REFERENCES:
patent: 2174931 (1939-10-01), Terry
patent: 3183770 (1965-05-01), Nyman
patent: 3220792 (1965-11-01), Vendig

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