Meta platforms technologies, llc (20240210677). ULTRAFAST ILLUMINATION FOR STRUCTURED LIGHT BASED EYE TRACKING simplified abstract
Contents
ULTRAFAST ILLUMINATION FOR STRUCTURED LIGHT BASED EYE TRACKING
Organization Name
meta platforms technologies, llc
Inventor(s)
Youmin Wang of Bellevue WA (US)
Gaetano Aiello of Redmond WA (US)
ULTRAFAST ILLUMINATION FOR STRUCTURED LIGHT BASED EYE TRACKING - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240210677 titled 'ULTRAFAST ILLUMINATION FOR STRUCTURED LIGHT BASED EYE TRACKING
The abstract describes an illumination system for eye tracking that utilizes a laser light source and an ultra-fast scanning micro-electromechanical system (MEMS) to reflect laser light to the eye and generate a desired fringe pattern.
- Laser light source and MEMS operate at a frequency range of about 10 kHz to 100 kHz.
- MEMS surface includes a diffractive optical element (DOE) to reflect laser light as a concentrated optical beam.
- Grating-based illuminators on a photonic integrated circuit (PIC) controlled through adiabatic couplers project multiple binary/grayscale images onto the eye.
- Detection side includes a 2D single-photon avalanche diode (SPAD) sensor or a SPAD array detector and an active MEMS shutter array.
- Compressive sensing techniques may be applied on the detection side.
Potential Applications: - Eye tracking technology for research and development purposes. - Biometric security systems. - Virtual reality and augmented reality applications.
Problems Solved: - Precise and controlled illumination for eye tracking. - Efficient generation of fringe patterns for accurate eye tracking. - Enhanced detection capabilities for eye tracking systems.
Benefits: - Improved accuracy and reliability in eye tracking. - Enhanced security features for biometric applications. - Advanced capabilities for virtual and augmented reality experiences.
Commercial Applications: Title: Advanced Eye Tracking Illumination System for Biometric Security and Virtual Reality This technology can be used in: - Biometric security systems for access control. - Virtual reality and augmented reality headsets for immersive experiences. - Research and development in eye tracking technology.
Questions about Eye Tracking Illumination System: 1. How does the use of compressive sensing techniques improve detection in this system? 2. What are the advantages of using a diffractive optical element (DOE) in the MEMS surface for reflecting laser light?
Original Abstract Submitted
an illumination system for eye tracking is described herein. the illumination system may include a laser light source and an ultra-fast scanning micro-electromechanical system (mems) operating at a frequency range from about 10 khz to about 100 khz to reflect laser light to the eye and generating a desired fringe pattern controlling intensity and timing. a surface of the mems may include diffractive optical element (doe) to reflect the laser light as a concentrated optical beam. the light may also be projected by grating-based illuminators on a photonic integrated circuit (pic) controlled through adiabatic couplers projecting multiple binary/grayscale images onto the eye. on the detection side, a 2d single-photon avalanche diode (spad) sensor or a spad array detector and an active mems shutter array may be used. compressive sensing techniques may be applied on the detection side.
