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Optical phased array and lidar sensor using same

An optical phased array and phase shifter technology, applied in the field of LiDAR sensors, can solve problems such as complex correction processing

Pending Publication Date: 2021-01-08
TAISEI TECHNO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, if the wavelength is different due to the wavelength dependence of the refractive index, the phase shift is different, so the correction process becomes considerably complicated

Method used

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  • Optical phased array and lidar sensor using same
  • Optical phased array and lidar sensor using same
  • Optical phased array and lidar sensor using same

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Embodiment Construction

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.

[0047] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment shown below is a LiDAR sensor using the optical phased array of the present invention. However, the LiDAR sensor is an example, and the field of application of the optical phased array of the present invention is not limited thereto. For example, the optical phased array of the present invention can be used for security applications such as surveillance devices, flight navigation applications such as drones, and arbitrary applications requiring other three-dimensional information.

[0048] figure 1 It is a diagram showing the configuration of a LiDAR sensor using an optical phased array according to an embodiment of the present invention. This LiDAR sensor 100 includes ...

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Abstract

The present invention provides an optical phased array (OPA) capable of performing a function for beam steering or beam scanning based on a relatively small phase shift without the need for a complexcalibration process for determining a phase-shift compensation amount. The optical phased array comprises: a bus waveguide that is constituted by an optical waveguide formed on a substrate and allowsinput light to propagate therethrough; a plurality of photocouplers provided on the bus waveguide, each of the photocouplers extracting a portion of the light propagating through the bus waveguide; aplurality of waveguide lines each propagating the light extracted by the plurality of photocouplers; and a phase shifter provided on the bus waveguide. The plurality of waveguide lines has mutually equal optical path lengths. A phase shifter is provided on each section of the bus waveguide between adjacent photocouplers.

Description

technical field [0001] The invention relates to the technical field of optical sensors, in particular to an optical phased array and a LiDAR sensor using the optical phased array. Background technique [0002] LiDAR sensors are used for remote sensing and ranging, for example, for real-time three-dimensional mapping and detection, tracking, and identification of objects in automatic driving systems and the like. [0003] The LiDAR sensor scans the laser beam in the observation space and irradiates the object in the space, and measures the time of flight (TOF, Time of Flight) until the irradiated beam reaches the object, reflects and returns to the receiver in the LiDAR sensor, thereby Determine the position and distance of the object. [0004] As such a LiDAR sensor, a sensor that scans a laser beam using a mechanical rotating part is known, but in a part system such as an advanced driver assistance system (ADAS) or an autonomous driving system, it is preferable to use a se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01G02B6/124G02B6/125
CPCG01S7/02G02F1/035G02F1/295G01S7/481G02F1/01G02B6/124G02B6/125
Inventor 金成君
Owner TAISEI TECHNO