Journal of the Society of Motion Picture and Television Engineers (1950-1954)

three rows each of 250 matched lenses. These cameras provide for a relatively high resolution. A high-speed rotating-mirror frame camera, utilizing C. B. Miller's isotransport system, which he first devised hi connection with the NAGA-Miller Model 2 Camera, forms the basis for a new instrument described by B. Brixner of the Los Alamos Scientific Laboratory.42 This instrument provides for frame frequencies up to 3,500,000 frames/sec, utilizing 170 framing lenses working at //26. An air turbine designed by Dr. W. E. Buck of the Los Alamos Scientific Laboratory with the assistance of Prof. J. W. Beams of the University of Virginia may be operated to 10,000 rps. The images produced are 1.2 X 1.4 cm in size. A second model based on the isotransport system has been designed for 100,000 frames/sec operation providing for 90 images 20 mm in diameter. An electric motor drive provides a mirror speed of 550 rps. High-Speed Photography Applications. High-speed cinematography utilizing commercially available apparatus has found a very wide range of application in the design, development and proof of automotive vehicles, at the General Motors Proving Ground. Painter43 describes techniques for light measurement, installation of apparatus and analysis of records. Internal combustion engine research using high-speed motion-picture instrumentation was described by Bowditch,44 involving both specially designed and commercial high-speed cameras. Frame frequencies to 5000 per second were employed. One supposes that additional work is going forward at higher frame frequencies in order to study more fully these rapid phenomena of combustion, although none is described in this paper. Photographic instrumentation, essentially multistation stills using high-speed flash techniques, was developed for use at the U.S. Naval Ordnance Test Station Aeroballistics Laboratory. Barkofsky45 describes the physical design of this free flight range for missile testing which includes, at a number of stations, means for producing vertical and horizontal images of projectiles in flight. Techniques and circuitry have been developed for providing multiple images at each station. An airborne camera which takes J by 2 J-in. pictures at rates up to 450 frames/sec on 70mm film has also been developed by the U.S. Naval Ordnance Test Station. The film is stationary during exposure. The long, thin aperture shape, high frame rate, and small size and weight make it a useful tool for work in ordnance, aircraft, and machine design. The Springfield Armory has made further developments with rapid methods for quantitative analysis of high-speed motion-picture data. A special slide rule provides for the mechanical computation of time, displacement, velocity, and acceleration of a moving machine part in mechanics research. High-speed motion-picture photography and continuous-film cathode-raytube oscillography were used in concert in the study of cardiac function. Diastolic and systolic blood pressures together with motion-picture and highspeed motion-picture photography of animal hearts have provided a new insight into blood flow and heart action as reported by Fields, Fields, Gerlach and Prinzmetal.46 Miscellaneous. A. C. Keller of the Bell Telephone Labs, discussed the advantages inherent in high-speed motionpicture photography from an economic viewpoint.47 Gilkeson and Turula,48 in a paper before this Society, set forth several series of lenses which may be adapted to high-speed motion-picture cameras. Included are several catadioptric telephoto lenses; focal lengths from 3.7 mm to 80 in. are covered. Continuously Moving Film Systems. Impact loading deformation was studied by means of a rotating-drum camera de George R. Groves: Progress Committee Report 549