Abstract

The technique developed by Mizutani and his co-workers (Trans. JSME 52-476B (1986), 1931), in which the self-emission images of radicals were obtained by the image processing technique using a system composed of optical interference filters, an image intensifier and a video camera, was improved. As a result, the time averaged emission images of OH and CH radicals with a high S/N ratio and a high accuracy became obtainable for both luminous flames and nonluminous ones. In addition, for nonluminous flames, not only the time averaged images of OH, CH and C2 radicals but also their instantaneous images of ca. 1 ms exposure became obtainable.

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