Detection of surface points with an 850nm laser and an NDI stereo camera

Accurate three dimensional scanning of surfaces, especially on humans, is more and more relevant. The usage of laser projection systems is widespread. However, a medical certification Class I, high accuracy, a flexible and not static handling as well as the ability to record from more than one direction has never been combined in a single device. Our project aims at the ideal setting for an easy to use, flexible scanning method from more than one recording direction for human tissue without a need of protective equipment. A minimum of requirements for the user and the system itself, as well a possible certification as medical product shall be implemented using a high accurate NDI stereo camera. Interactions and influences of the considered laser modules and reflectors on/with the camera were examined. In this paper, we present, to the authors' best knowledge, novel results of an ideal parameter setting and the requirements based on an 850nm laser module and human tissue for possible applications in navigated surgery or individualized prosthetics.