Brief Communications

Contrast reversal in photographic recording of laser radiation

S. Yu. Drobinin, A. I. Sokolovskaya, N. V. Okladnikov


Abstract: An investigation was made of the action of 10^–8–10^–9 sec laser pulses in the presence of stray illumination of silver halide photographic emulsions commonly used in scientific research. It was found that sensitization or desensitization of a photographic emulsion with respect to the subsequent illumination could occur depending on the laser pulse power. In the case of successive or simultaneous recording of a high-power laser pulse and a low-intensity pulse representing background illumination, contrast reversal was observed for a certain level of illuminations and ratio of their intensities. When the order of recording was reversed, a negative image was always obtained.

UDC: 681.2.087.5

PACS: 42.60.He, 07.68.+m

Received: 02.06.1981

 English version: Soviet Journal of Quantum Electronics, 1982, 12:1, 116–117

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