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CathodeRay-Tube Applications in Photography and Optics*
BY CARL BERKLEY AND RUDOLF FELDT
ALLEN B. DuMoNT LABORATORIES, CLIFTON, NEW JERSEY
Summary — Cathode-ray tubes and oscillographs are ideal tools for the solution of many technical problems in the related arts of photography and optics. The methods described represent typical examples of the application of electronic-measurement techniques in such fields.
Applications considered and illustrated include:
1. Gloss measurement on photographic papers.
2. Goniophotometry of light sources.
3. Shutter, flashbulb, and synchronizer testing.
4. Cathode-ray-tube light sources for facsimile and stroboscopic work.
5. Scanning technique for television motion picture recording.
6. The combination of optical and electronic magnification for the study of gear and sprocket imperfections.
7. Automatic H and D curve plotting during film development.
8. Cathode-ray-tube sound on film recording systems.
9. The measurement of ripple in light sources.
10. Color studies in natural color reproduction and chromatic aberration in lenses.
1 1 . Vibration studies of motion picture equipment.
The techniques and cathode-ray oscillograph accessories described will find wide application in other fields as well.
MAINLY BECAUSE OF its rapid response and graphic presentation of results, the cathode-ray oscillograph has found wide application in the solution of many technical problems in diverse fields. In the course of their work, the authors and the members of the Applications Engineering Section of DuMont Laboratories have gained considerable experience in the application of the basic oscillographic techniques used in the solution of these problems. Since photographic and optical methods have become increasingly important in oscillography, a surprising proportion of the applications studies at the Laboratories have been in these fields. The techniques here described for photography and optics are basic and applicable to a much wider range of problems. To illustrate this point, it will be shown that many of the methods herein described will find direct application in the automotive industry. It is therefore felt that
* Presented November 5, 1948, at the National Electronics Conference, Chicago.
Published in Electronic Engineering (England).
64 JUNE, 1949 JOURNAL OF THE SMPE VOLUME 52