Active illumination and time-of-flight camera system to evaluate facial blood flow, eye movements and physiological parameters
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United States of America
Stats
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Feb 18, 2025
Grant Date -
Sep 7, 2023
app pub date -
Mar 6, 2023
filing date -
Mar 6, 2023
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A measurement system comprising one or more semiconductor diodes configured to penetrate tissue comprising skin. The detection system comprising a camera, which may also include a direct or indirect time-of-flight sensor. The detection system synchronized to the pulsing of the semiconductor diodes, and the camera further coupled to a processor. The detection system non-invasively measuring blood within the skin, measuring hemoglobin absorption between 700 to 1300 nm, and the processor deriving physiological parameters and comparing properties between different spatial locations and variation over time. The semiconductor diodes may comprise vertical cavity surface emitting lasers, and the detection system may comprise single photon avalanche photodiodes. The measurement system may be used to observe eye parameters and differential blood flow. The system may be used with photo-bio-modulation therapy, or it may be used in advanced driver monitoring systems for multiple functions including head pose, eye tracking, facial authentication, and smart restraint control systems.
First Claim
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International Classification(s)
- G01J:MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTE....
- G01M:TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR S....
- G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
- A61B:DIAGNOSIS; SURGERY; IDENTIFICATION
- A61C:DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL....
- H01S:DEVICES USING STIMULATED EMISSION
- 2023 Application Filing Year
- G01J Class
- 841 Applications Filed
- 280 Patents Issued To-Date
- 33.30 % Issued To-Date
Cited Art Landscape
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- G01J Class
- 0 % this patent is cited more than
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