Optical system, method and computer program for detecting the presence of a living biological organism

摘要

The system is comprised of at least one pair of light sources (1;2;3) that emit pulsed electromagnetic radiation in the near-infrared zone; at least one pair of light sources (1;2;3) that emit radiation in the near-ultraviolet zone; at least one photodetector (4) with the absorption band located in the near-infrared zone, for detecting the pulsed radiation transmitted and reflected on the biological element, on the basis of the pulsed radiation emitted by the pair of light sources that emit the radiation in the near-infrared; at least one photodetector (5) with the absorption band located in the near-ultraviolet zone, for detecting the pulsed radiation transmitted and reflected on the biological element, on the basis of the pulsed radiation emitted by the pair of light sources (1;2;3) that emit the radiation in the near-ultraviolet zone; a control unit (8(c)) that interprets the pulsed radiation transmitted and reflected on the biological element; and a processing unit (8(d)) that determines if it is a living biological element, on the basis of the radiation interpreted by the control unit.

主权项

1. An optical system for detecting a presence of a living biological element, comprised of
at least one pair of light sources (1; 2; 3) that emit pulsed electromagnetic radiation with an emission band located in a near-infrared zone of the electromagnetic spectrum; at least one pair of light sources (1; 2; 3) that emit pulsed electromagnetic radiation with an emission band located in a near-ultraviolet zone of the electromagnetic spectrum; at least one photodetector (4) with an absorption band located in the near-infrared zone of the electromagnetic spectrum, for detecting the pulsed radiation transmitted and reflected on the biological element, on a basis of the pulsed radiation emitted by the pair of light sources that emit the radiation with the emission band located in the near-infrared zone; at least one photodetector (5) with an absorption band located in the near-ultraviolet zone of the electromagnetic spectrum, for detecting the pulsed radiation reflected on the biological element, on a basis of the pulsed radiation emitted by the pair of light sources (1; 2; 3) that emit the radiation with the emission band located in the near-ultraviolet zone; a control unit (8(c)), connected to the pairs of light sources and to the photodetectors, which interprets the pulsed radiation transmitted and reflected on the biological element and detected by the photodetectors; and a processing unit (8(d)), connected to the control unit, which determines if the biological element is a living biological element, on a basis of the radiation interpreted by the control unit, and by an emission of a periodic signal obtained by the pulsed radiation emission of the pairs of light sources on an alternate basis, due to a sinusoidal electrical signal configured for the emission of the pairs of light sources.