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US4053220A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for optically copying small film images with good resolution

Assignee: Photographic Equipment Service Inc
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Filing: 1976-02-20
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Granted: 1977-10-11
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Expires: 1996-02-20
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Abstract

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 (≦) one-eighth of an inch, (i.e., approximately equal to or less than one-eighth of an inch).

Inventors

  • 👤 Paschal S. Mathison

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 13:08
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/46

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 298 words
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;
Claim 2
Dependent Claim 298 words
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;
Claim 3
Dependent Claim 17 words
said transparent mirror being of good optical glass and of a thickness (≦) one-eighth of an inch.
Claim 4
Dependent Claim 17 words
said transparent mirror being of good optical glass and of a thickness (≦) one-eighth of an inch.
Claim 5
Dependent Claim 23 words
The optical copying apparatus of claim 1 characterized by the thickness of said transparent mirror being about one-eighth of an inch (±3.175 mm).
Claim 6
Dependent Claim 64 words
The optical copying apparatus of claim 2 characterized by one of the internal chamber defining sidewalls having an access opening adjacent the screen surface through which an operator may reach to add to and/or subtract by masking from any composite image on the bottom surface screen selected image portions for altering the composite images that will be registered on film in said reproducing camera.
Claim 7
Dependent Claim 27 words
The optical copying apparatus of claim 1 characterized by the inner surfaces of the walls of the chamber structure except the bottom screen surface being ray absorptive.
Claim 8
Dependent Claim 22 words
The optical copying apparatus of claim 4 characterized by said inner wall surfaces except the bottom screen surface being ray absorptive black.
Claim 9
Dependent Claim 39 words
The optical copying apparatus of claim 1 characterized by said elevationally adjustable reproducing camera having associated therewith automatic means to keep its film gate in focus with respect to said screen surface in the elevational adjustment of said camera.
Claim 10
Dependent Claim 33 words
The optical copying apparatus of claim 1 characterized by the reflective coating of said transparent mirror having a ratio of rays transmission to rays reflection in the range of about 60:40 to 40:60.

References Cited (Backward Citations)

CA720756A Cited
DE326527C Cited
US2665608A Cited
US2727427A Cited
US2857806A Cited
US3364815A Cited
US3649120A Cited
US3846022A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-10-10 1981-04-11 1981-10-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-10-10 1985-04-11 1985-10-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-10-10 1989-04-11 1989-10-11 $7700.00 Window Closed / Lapsed

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