Fordyce Tuttle

The Problem of Motion Picture Projection from Continuously Moving Film

A summary of the advantages claimed for non-intermittent projectors is given. This is followed by a list of questions which the writers think should be answered with regard to any projector of this type.The various projector types are then classified according to the optical means used to form a fixed image. Two types of error are noted and each type of projector listed is discussed keeping these in mind.A reference table is appended to serve as a rapid review.

Introduction to the Photographic Possibilities of Polarized Light

The introduction of an efficient plane polarizing sheet material in sizes large enough to cover lenses and lights has made simple the use of polarized light in photography. An Eastman Pola-screen, incorporating this material, over the lens, allows unusual sky effects, photographing obliquely through glass and water without reflections, and photographing other surfaces obliquely to show surface detail. When the subject is illuminated through larger Pola-screens, in addition, complete control of gloss results. Faces so photographed can appear unnaturally perspiry, or devoid of all lustre, depending upon the camera Pola-screen position. Reflections from animation cells can be greatly reduced, and photographing any small subject that presents a reflection problem is quite simple. Various trick lightings and color effects are also attainable.

Optical Aids in Signal Processing

In this paper a variety of optical processing techniques are considered, compared, and discussed, with particular emphasis on those exploiting the information storage density of photographic film.