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7 June 1989 Phototiming Used Fiber Optics For Orthographical Flash Photography
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Proceedings Volume 1032, 18th Intl Congress on High Speed Photography and Photonics; (1989)
Event: 18th International Congress on High Speed Photography and Photonics, 1988, Xi'an, Shaanxi, China
A. "The ballistic-range of the flight line" is important current installation facilities for aerodynamic and ballistics in many countries. There are a tens of flash orthographical shadow photograph points which are the main test equipments in the ballistic range of the flight line. The tests shows, there can be 3 us unsychroniged intervels between the two-flashes at same photographical point. It could result in unnegligible measurement error. therefor. the synchronism of orthographical photography should be improved. B. One flash light source was divided as two orthographic flash lightsources by the "Y" optical fiber bundle with optical coupled devices. On this way, it not only has kept flash light synchronism strictly, but also simplified the optical structure-decreased in number of flash light sources. and improved the quality of photographes. The preliminary tests with the pockets showed that the optical fiber synchronization technic got satisfactory results. C. It is important to pay attention on the light transfer efficieney, the characteristics of point light sources and its symmetry, so that, the flash shadow photography is ever satisfified with light splitting sources, the spectrophotometric characteristics of flare light sources transmission rates of optical fibers for different band. numerical aperture. size and structure of optical devices size and place of the light source image. the terminal section size:and arrangement of fiber optical branches ect. All of those are important considering factors for designing optical coupled devices, fiber optical branches and choosing optical fiber materials.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhang Shuqing "Phototiming Used Fiber Optics For Orthographical Flash Photography", Proc. SPIE 1032, 18th Intl Congress on High Speed Photography and Photonics, (7 June 1989);


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