20240045061. ACQUISITION OF DISTANCES FROM A SENSOR TO A SCENE simplified abstract (Commissariat à l'Energie Atomique et aux Energies Alternatives)

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ACQUISITION OF DISTANCES FROM A SENSOR TO A SCENE

Organization Name

Commissariat à l'Energie Atomique et aux Energies Alternatives

Inventor(s)

Josep Segura Puchades of Grenoble (FR)

Laurent Frey of Grenoble (FR)

Anis Daami of Grenoble (FR)

ACQUISITION OF DISTANCES FROM A SENSOR TO A SCENE - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240045061 titled 'ACQUISITION OF DISTANCES FROM A SENSOR TO A SCENE

Simplified Explanation

The present description is about a method of acquiring distances from a sensor to a scene using a laser beam. The method involves a number of consecutive capture sub-phases, each comprising supplying a laser beam with a linearly varying optical frequency over a frequency range, delivering a reference beam and a useful beam from the laser beam, and illuminating the scene with the useful beam while illuminating at least one pixel row with a superposition of the reference beam and a reflected beam. The absolute value of the ratio between the frequency range and the time period is different for each capture sub-phase.

  • The method involves using a laser beam with a linearly varying optical frequency to acquire distances from a sensor to a scene.
  • The laser beam is split into a reference beam and a useful beam.
  • The scene is illuminated with the useful beam, while at least one pixel row is illuminated with a superposition of the reference beam and a reflected beam.
  • The frequency range and time period are adjusted differently for each capture sub-phase.

Potential applications of this technology:

  • Distance measurement in various fields such as robotics, autonomous vehicles, and industrial automation.
  • 3D scanning and mapping of objects and environments.
  • Augmented reality and virtual reality applications.
  • Object detection and tracking.

Problems solved by this technology:

  • Accurate and precise distance measurement.
  • Overcoming limitations of traditional distance measurement methods.
  • Handling complex scenes with multiple objects and surfaces.
  • Dealing with varying lighting conditions.

Benefits of this technology:

  • Improved accuracy and precision in distance measurement.
  • Faster acquisition of distances compared to traditional methods.
  • Ability to measure distances in complex and dynamic scenes.
  • Reduced sensitivity to lighting conditions.
  • Potential for integration into various devices and systems.


Original Abstract Submitted

the present description concerns a method of acquisition of distances from a sensor to a scene, comprising a number n of consecutive capture sub-phases c, with n an integer greater than or equal to and i an integer index ranging from to n, each sub-phase ccomprising: supplying a laser beam having an optical frequency (f) linearly varying over a frequency range of width bfor a time period t; delivering, from the laser beam, a reference beam and a useful beam; and illuminating the scene with the useful beam and illuminating at least one pixel row with a superposition of the reference beam and of a reflected beam. an absolute value of a ratio b/tis different for each capture sub-phase c.

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