Elbit Systems has developed an optical seismic surveying system using a multibeam laser source, Diffractive Optical Element, imager, and processor. The system splits laser beams to create laser spots, captures speckle patterns, and analyzes vibrations in an area of interest. GlobalData’s report on Elbit Systems gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Elbit Systems, AR/VR head-up displays was a key innovation area identified from patents. Elbit Systems's grant share as of February 2024 was 55%. Grant share is based on the ratio of number of grants to total number of patents.
Optical seismic surveying system using multibeam laser source
A recently granted patent (Publication Number: US11921254B2) discloses an optical seismic surveying system that utilizes a multibeam laser source with a Diffractive Optical Element to direct laser beams towards a common focal point, creating a laser spot assemblage on an area of interest. An imager captures defocused images of speckle patterns produced by diffused reflections of the laser spots, with a processor determining relative displacements between these patterns to generate time signals representing vibrations at each sensing point. The system also includes an optical arrangement, a tracking module for system positioning and motion information, and can employ different scanning methods like along-track scanning or step-stare scanning.
Furthermore, the patent describes a seismic surveying method based on the system's procedures, including directing laser beams, acquiring speckle pattern images, and determining relative displacements to generate time signals for vibration analysis. The method involves fine spatial displacement estimation, course spatial displacement estimation, and distance determination between the imager and laser spots. Additionally, the method includes producing seismic maps, detecting objects in the area of interest, and compensating for common motion effects on speckle pattern displacement. The system's processor can also generate seismic images with detected underground objects superimposed on geographical maps or images of the area of interest.
In summary, the patented optical seismic surveying system and method offer a comprehensive approach to seismic data collection and analysis, utilizing advanced laser technology, imaging techniques, and motion tracking capabilities. By combining these elements, the system aims to provide accurate and detailed seismic information for various applications, including underground object detection and seismic mapping.
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