3 results about "Single sweep" patented technology

The application discloses a kind of full polarization FMCW laser radar systems and measuring methods, system includes sweep laser source, first optical coupler, polarization state generation module, optical circulator, optical transceiver and scanning module, polarization state analysis module, second optical coupler, photoelectric balance detector and signal acquisition and processing module;Wherein, sweep laser source, first optical coupler, polarization state generation module, optical circulator and optical transceiver and scanning module are sequentially connected;Polarization state analysis module, second optical coupler, photoelectric balance detector and signal acquisition and processing module are sequentially connected;First optical coupler is also connected with second optical coupler;Optical circulator is also connected with polarization state analysis module.The application realizes a kind of new laser radar system, which can be synchronized, high-speed, complete target distance, speed and complete mueller matrix are obtained by single sweep.

This invention discloses a high-resolution distributed acoustic-vibration demodulation method based on sweep-frequency optical deep anti-fading. First, continuous linear sweep-frequency probe light is injected into an optical fiber, and the original backscattered Rayleigh signal containing information distributed along the fiber is acquired through coherent beat frequency acquisition. Then, the original backscattered Rayleigh signal undergoes frequency domain demultiplexing and matched-filter pulse compression processing to reconstruct multiple high-resolution time-domain complex envelope signals from a single sweep. Next, the high-resolution time-domain complex envelope signals are input into a deep anti-fading demodulation network, where amplitude-phase joint modeling achieves adaptive suppression of random fading and noise in the time-domain complex envelope signal, outputting a de-fading phase sequence. Finally, the de-fading phase sequence is used for phase difference demodulation, and combined with an optical time-of-flight positioning model, to achieve highly robust demodulation and spatial positioning of vibration events. This method maintains high resolution and robustness even under strong noise, long distance, and deep fading conditions, making it suitable for distributed acoustic-vibration and ultrasonic monitoring scenarios.

Systems and methods for fast light field rendering from a three-dimensional (3D) representation of a scene. In at least one embodiment, fast light field rendering exploits cached color values of a plurality of color planes corresponding to a reference view and cached transmittance values of a plurality of transmittance planes corresponding to the reference view to composite a light field quilt via a single sweep through a plurality of sampling planes / volume chunks, thereby enhancing computational efficiency during rendering.