Patent ID: 10185027

Abstract:
In one embodiment a laser range finder generates high-intensity laser pulses with intensities above a threshold intensity (e.g. above an eye-safe intensity) in an adaptive-intensity region of the field of view. The laser range finder further generates lower intensity (e.g. eye-safe) laser pulses in a protective guard region (e.g. a guard ring) that surrounds the high-intensity laser pulses. The guard region is located in the FOV such that ingress paths to the adaptive-intensity region must first traverse the lower-intensity guard region. The laser range finder analyzes laser reflections from the guard region to improve timely prediction of object intrusion into the adaptive-intensity region, thereby providing time to determine object trajectory or object classification. Upon determination that an object is likely to intersect the high-intensity laser pulses the laser range finder can discontinue the high-intensity laser pulses and instead generate laser pulses below the threshold intensity (e.g. eye-safe intensity laser pulses).