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Fused silica element zero probability damage threshold prediction method based on photo-thermal weak absorption

The invention discloses a fused silica element zero probability damage threshold prediction method based on photo-thermal weak absorption; the method comprises the following steps: pre-processing the surface areas of a standard fused silica element sample of the same model with a to-be-tested fused silica element in different levels; carrying out photo-thermal detection on the areas processed in different levels so as to obtain a photo-thermal detection value, and carrying out a laser threshold test so as to obtain a zero probability damage threshold; building a photo thermal detection-zero probability damage threshold association curve model of the to-be-tested fused silica element according to the photo-thermal detection values and corresponding zero probability damage thresholds of all areas; carrying out photo-thermal detection for the to-be-tested fused silica element so as to obtain the photo-thermal detection value, searching the corresponding zero probability damage threshold according to the photo thermal detection-zero probability damage threshold association curve model, thus obtaining the zero probability damage threshold of the to-be-tested fused silica element. The method can realize nondestructive test on the fused silica element, is simple in operation, high in accuracy, high in sensitivity, and can satisfy laser optical system usage requirements.
Owner:NAT UNIV OF DEFENSE TECH
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