Two high-speed, dimensional measurement systems have been developed. Both have several advantages over conventional measurement systems. Both have been designed around the use of line gratings. The first system measures and controls the flatness of opaque objects to a resolution of 100 microinches. The method is fast, non-contacting, self-calibrating, can be used in a limited access area, and can be applied to moving surfaces. The second system is used to measure and control the width of continuous opaque objects such as tapes. The method is noncontacting, minimizing frictional wear. One thousand measurements per second, at a resolution of 100 microinches, can be made.
A film process has been designed for use in oscillography and similar applications were in-line processing at variable rates is a desirable feature. A film, Kodak 2490 RAR Film (Estar Base), has been designed specifically for high-temperature monobath processing, and a monobath, Kodak 448 Monobath, has been designed to develop and clear this film simul-taneously in 30 seconds at approximately 100°F. Unusually broad latitude with respect to temperature, time, and agitation characterizes the process, but it is essential that the mechanical component required to provide a complete processing system be designed with attention to the special characteristics of this new film process combination.
A new flash X-ray source which penetrates thick objects and records shadowgraphs directly on film is discussed. Radiographs with 20 nanosec. exposure time provide hypervelocity stop motion data. Cineradiographs at frame rates to 10 /sec. are provided by a single X-ray tube. Stereo-cineradiographs are provided by tube pairs activated by a single pulser at 180 kV.
A highly specialized instrument is described which employs time-integrated high-speed techniques. It is employed for surface measurements of 0.25 microinch accuracy to support studies of the time-displacement relationships and absolute displacement amplitudes of adjacent surfaces.
An infrared imaging system is described that has multiple target capability to measure infrared radiation and to obtain spatial data on missiles in the launch, boost, and re-entry phases. Unclassified aspects of measurements of launch vehicles made at the Seehorn Site, White Sands Missile Range, are discussed. Major components of the system include an infrared vidicon sensitive about 1.4 and an f/1.2 optical system with a 6-deg. field of view for focusing infrared radiation onto the vidicon sensing surface. The output video is viewed on a television monitor and simultaneously recorded in real time on video tape at normal TV rates. From the video recording, it is possible to obtain an A-scope presentation of any single video line on a per frame basis, and hence the radiant intensity of multiple targets can be quantitatively determined from a single observation.