Journal of the Society of Motion Picture and Television Engineers (1950-1954)
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signed at the Armour Research Foundation.49
A novel apparatus was designed by Buck50 using an interferometric means for the recording of high-speed transient pressure changes.
Light sources. The excitation of certain gases such as argon by an explosive shock front results in a relatively short-duration high-intensity flash. Winning and Edgerton51 have studied this phenomenon and have continued the work of others in the development of explosive argon flash lamps. The exposure duration may be controlled by the thickness of the argon layer.
X-Ray Motion-Picture Photography. X-ray motion-picture photography, since the early 1900's, has proven to be of considerable value in medical research and diagnosis. Weinberg, Watson and Ramsey52 at the Medical School of the University of Rochester recently developed a new 70mm motion-picture camera for the indirect x-ray recording method (the image of the fluorescent screen being recorded) . A special //0.75 lens was developed by the Eastman Kodak Co. for use in this system.
Data Reduction. Griffin and Green,53 of the U.S. Naval Test Station, Inyokern, have studied considerations of camera design and photographic image affecting the assessment accuracy of records taken for measurement. For certain camera systems, errors in film measurements were reported to range from 2 to 75 u. An analysis was made of the means necessary to minimize such reading errors.
Summary. The above represents a small but very significant portion of the world's photographic literature on the subject of high-speed motion-picture and still photography. This Society, it is believed, has made great strides in its function of dissemination of basic information in this field. The effort of the HighSpeed Photography Committee in the future is expected to be directed to furthering this end to an even greater extent and the Committee is counting heavily
on the Society's membership for increased participation.
References
1. Aaron Nadell, "Cinerama — a step in the right direction," Intern. Projectionist, 27: 10, Oct. 1952.
2. Merle Chamberlin, "Natural Vision — another step in the right direction," Intern. Projectionist, 28: 5, Jan. 1952; "Three-D progress report," ibid., 7, Feb. 1952.
3. Raymond Spottiswoode, "Progress in three-dimensional films at the Festival of Britain," Jour. SMPTE, 58: 291303, Apr. 1952.
4. Raymond Spottiswoode, "Progress in three-dimensional films in England," Brit. J. Phot., May 2, 1952.
5. Raymond Spottiswoode, "Three-dU mensional films at Battersea," Brit. J. Phot., Aug. 29, 1952.
6. Raymond Spottiswoode, N. L. Spottiswoode and Charles Smith, "Basic principles of the three-dimensional film," Jour SMPTE, 59: 249-286, Oct. 1952.
7. H. Dewhurst, "Auto-precision stereoscopy," Phot. J., Sec. B, 92B: 2-24, Jan.-Feb. 1952.
8. Eugene Millet, "Some geometrical conditions for depth effect in motion pictures," Jour. SMPTE, 59: 517-523, Dec. 1952.
9. H. Dewhurst, "Come into the twoeyed world with stereo movies," Bolex Reporter, Fall 1952, et seq.
10. John G. Frayne and John P. Livadary, "Dual photomagnetic intermediate studio recording," Jour. SMPTE, 59: 388-397, Nov. 1952.
11. A. L. Holcomb, "Three-phase power from single-phase source," Jour. SMPTE, 59: 32-39, July 1952.
12. L. I. Carey and Frank Moran, "Pushpull direct-positive recording — an auxiliary to magnetic recording," Jour. SMPTE, 58: 67-70, Jan. 1952.
13. O. L. Dupy, "A method of directpositive variable-density recording with the light valve," Jour. SMPTE, 59: 101-106, Aug. 1952.
14. P. E. Axon, Research Dept., B.B.C. Engineering Div., "Overall frequency characteristic in magnetic recording," B.B.C. Quarterly, V, No. 7: Spring 1950.
550
May 1953 Journal of the SMPTE Vol. 60