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Acknowledgments
We acknowledge with pleasure the cooperation of R. G. Neuhauser, F. S. Veith and Dr. R. B. Janes, of RCA Lancaster, in the solution of many tube and circuit problems, and the help of Dr. O. H. Schade in providing a firm basis for evaluation of performance. The advance-development phase of the problem owes much to E. M. Gore and S. L. Bendell of RCA Victor, Camden. The commercial embodiment of the equipment is due to the efforts of N. L. Hobson and F. E. Cone of the Broadcast Equipment Section.
References
1. H. N. Kozanowski, "Improved tele
vision picture performance," Broadcast News, 67: Jan.-Feb. 1952.
2. P. K. Weimer, S. V. Forgue and R. R. Goodrich, "The vidicon photoconductive camera tube," RCA Rev., XII:
'306-313, Sept. 1951.
3. B. H. Vine, R. B. Janes and F. S. Veith, "Performance of the vidicon, a small developmental television camera tube," RCA Rev., XIII: 3-10, Mar. 1952.
4. R. G. Neuhauser, "Vidicon for film pickup," Jour. SMPTE, 62: 142-152, Feb. 1954.
5. R. C. Dennison, "Aperture compensation for television cameras," RCA Rev., XIV: 569-585, Dec. 1953.
6. L. T. Sachtleben, D. J. Parker, G. L. Alee and E. Kornstein, "Image orthicon color television camera optical system," RCA Rev., XIII: 27-33, Mar. 1952.
Screen Brightness Committee Report
By W. W. LOZIER, Committee Chairman
J_ HIS REPORT will review progress since the last formal report of the Committee presented to the Society at its October 1952 meeting.1 It will also summarize the present status of various projects on the occasion of the completion of the writer's term of ofHce as Chairman.
1 . Subcommittee on Instruments and Procedures: This group under the chairmanship of F. J. Kolb, Jr., has prepared its report "Specifying and Measuring the Brightness of Motion Picture Screens," which was published in the October 1953 Journal? This report gives an exceptionally thorough analysis
Submitted on December 29, 1953, by W. W. Lozier, National Carbon Company, Division of Union Carbide and Carbon Corp., Fostoria, Ohio.
of the requirements, specifications and methods of use for various types of meters ranging from the research-type meter, which will do a most complete job of measuring all phases of intensity of incident illumination and reflected brightness over all portions of the motionpicture theater, on down to the most limited type of meter which will determine only the total luminous output of the projector without giving any information as to how this light is distributed over the picture screen and to the motion-picture audience. Having completed its assignment, this Subcommittee has now been disbanded.
It is gratifying to the Committee to note that screen-brightness meters embodying many useful and desirable features have recently become commercially available.3
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February 1954 Journal of the SMPTE Vol. 62