US 4,053,220 AGranted

Apparatus for optically copying small film images with good resolution

AssigneePhotographic Equipment Service, Inc.

InventorPaschal S. Mathison

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Abstract

Apparatus for optically copying to a desired scale with good resolution reproductions of small film images. Includes the equivalent of a filmstrip/slide or animation stand apparatus, a reproducing camera mounted upon an upright track support for elevational adjustment and having the axis of its focally adjustable lens and its gate arranged substantially downward, and a lateral tabletop supported below the camera lens for interception of the axis of the latter thereby. Means define an internal chamber which has a lateral bottom wall and an entrance upright sidewall with a top portion of this means having a large opening down through which the axis of the reproducing camera lens extends to the top face of the bottom wall and with the entrance wall having a beam entrance window. Means provide the top face of the bottom wall with a screen surface upon which an image bearing beam may be projected to form an image for photographic transfer upwardly into the reproducing camera, and means supports a projector with the optical axis of its gate and projecting lens arranged substantially laterally and extending through the beam entrance window into the chamber. An oblique transparent mirror is mounted in the chamber behind the entrance window and is canted forward toward the latter sufficiently so that its reflective surface receives image bearing beams from the projector and reflects them downward to and upon the top face screen for reflection back upward through the transparent mirror and the top opening for reception by the camera; this transparent mirror being of good optical glass and of a thickness (.ltoreq.) one-eighth of an inch, (i.e., approximately equal to or less than one-eighth of an inch).

Apparatus for optically copying to a desired scale with good resolution reproductions of small film images, comprising, in combination with

A. the equivalent of a filmstrip/slide or animation stand apparatus including a reproducing camera mounted upon an upright track support for elevational adjustment and having the axis of its focally adjustable lens and its gate arranged substantially downward, and a lateral tabletop supported below the camera lens for interception of the axis of the latter thereby, of
1. means defining an in-focus, image-displaying internal chamber including a lateral bottom wall structure and an entrance upright sidewall with a top portion of said means having a large opening down through which the axis of the reproducing camera lens extends to the top face of the bottom wall structure and with the entrance wall having a beam entrance window;
2. means providing the top face of said bottom wall structure with a screen surface upon which an image bearing beam may be projected for display thereon of an in-focus image for photographic transfer upwardly into the reproducing camera;
3. means supporting a projector with the optical axis of its gate and projecting lens arranged substantially laterally and extending through the beam entrance window into said chamber;
and
4. an oblique transparent mirror mounted in said chamber behind said entrance window and canted obliquely forward toward the latter so that its reflective surface is arranged at an acute angle to the bottom lateral screen surface with the beam entrance window located in this angle whereby said reflective surface receives image bearing beams from said projector and reflects them in focus downward to and upon said top face of the screen for reflection of the in-focus images back upward through said transparent mirror and the top opening for reception by said camera;
5. said transparent mirror being of good optical glass and of a thickness (.ltoreq.) one-eighth of an inch.

4 more elements

Abstract

Claims7