Optical evaluation method by means of laser pulses and corresponding apparatus

摘要

The method involves directing a set of laser pulses of one type and another set of laser pulses (12) of another type onto a sample (P) to be examined. The laser pulses hit the sample synchronously, within a very short time lag between the two laser pulses, or in a time-correlated manner to produce an optical signal. The signal is detected by detectors (D1-D3). Electronic differentiation between the two set of pulses and third set of pulses, which does not hit the sample synchronously, does not have a time lag between the two laser pulses or not hit in time-correlated manner, is performed. An independent claim is also included for a device for evaluating laser pulses.