US 2025/0016463 A1Published application

System, device and method for demultiplexing photodetector signals for multichannel spectral detection

OwnerVasile Diaconu, Jocelyn Faubertinventors

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Abstract

Demultiplexing photodetector signals for multichannel spectral detection uses three photodetectors having respective spectral maximal sensitivities to light within short, medium, and long wavelength zones to produce photodetector signals indicative of their respective spectral excitation levels within their respective wavelength zones. A distinctive color signal is produced for a photodetector signal indicating that this photodetector is at its highest spectral excitation level within its wavelength zone relative to the other photodetectors. An intermediary color signal is produced for a photodetector signal indicating that this photodetector is not at its highest spectral excitation level within its wavelength zone and overlaps with the excitation level of another photodetector. Distinctive and intermediary color signals are communicated to color channels activated by one of the received distinctive and intermediary color signals to produce respective distinctive or intermediary colors.

Claims20

Dependent claims

A system for demultiplexing photodetector signals for multichannel spectral detection, the system comprising:

three types of photodetectors for detecting light, each of the three types of photodetectors having a respective maximal spectral sensitivity to the light within a respective one of a short, medium and long wavelength zone thereof, each of the three types of photodetectors producing a respective photodetector signal indicative of a respective spectral excitation level thereof within the respective wavelength zones thereof;
a controller in operative communication with the three types of photodetectors and comprising a memory of processor executable code that when executed perform computer implementable steps comprising:
a) receiving the photodetector signals;
b) determining the spectral excitation level of each of the three photodetector types within the respective wavelength zones thereof based on the received photodetector signals;
c) producing a given one of three distinctive color signals for a given one of the received photodetector signals when the given one of the received photodetector signals is indicative of a highest spectral excitation level of a given one of the three types of photodetectors within the respective wavelength zone thereof relative to the other two photodetector types;
d) producing a given one of a plurality of intermediary color signals for a given one of the received photodetector signals when the given one of the received photodetector signals is indicative that a given one of the three photodetector types is not at the highest spectral excitation level thereof within the respective wavelength zone thereof and the spectral excitation level thereof overlaps with the spectral excitation level of one or both of the other two photodetectors;
e) communicating the produced given distinctive and intermediary color signals;
and
a plurality of color channels in operative communication with the controller for receiving the communicated given distinctive and intermediary color signals therefrom, wherein each of the color channels is respectively activated by a respective one of the received given distinctive and intermediary color signals to produce a respective color selected from three distinctive colors and a plurality of intermediary colors.

6 more elements

A device for demultiplexing photodetector signals for multichannel spectral detection, the device comprising:

a light input comprising three types of photodetectors for detecting light, each of the three types of photodetectors having a respective maximal spectral sensitivity to the light within a respective one of a short, medium and long wavelength zone thereof, each of the three types of photodetectors producing a respective photodetector signal indicative of a respective spectral excitation level thereof within the respective wavelength zones thereof;
a controller in operative communication with the three types of photodetectors and comprising a memory of processor executable code that when executed perform computer implementable steps comprising:
a) receiving the photodetector signals;
b) determining the spectral excitation level of each of the three photodetector types within the respective wavelength zones thereof based on the received photodetector signals;
c) producing a given one of three distinctive color signals for a given one of the received photodetector signals when the given one of the received photodetector signals is indicative of a highest spectral excitation level of a given one of the three types of photodetectors within the respective wavelength zone thereof relative to the other two photodetector types;
d) producing a given one of a plurality of intermediary color signals for a given one of the received photodetector signals when the given one of the received photodetector signals is indicative that a given one of the three photodetector types is not at the highest spectral excitation level thereof within the respective wavelength zone thereof and the the spectral excitation level thereof overlaps with the spectral excitation level of one or both of the other two photodetectors;
e) communicating the produced given distinctive and intermediary color signals;
and
a color output comprising plurality of color channels in operative communication with the controller for receiving the communicated given distinctive and intermediary color signals therefrom, wherein each of the color channels is respectively activated by a respective one of the received given distinctive and intermediary color signals to produce a respective color selected from three distinctive colors and a plurality of intermediary colors.

6 more elements

Dependencies are inferred from the claim text.