A wide-body surface grating and its antenna system, and a laser radar three-dimensional scanning system
A surface grating and antenna system technology, applied in the directions of optical waveguides, optics, light guides, etc., can solve the problems of difficulty in accurately controlling amplitude and phase, affecting scanning quality, and difficulty in wide application, avoiding interference, simple process, and eliminating crosstalk. Effect
Active Publication Date: 2022-01-28
长沙思木锐信息技术有限公司
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, this will lead to crosstalk between different waveguides and different gratings, and it is difficult to precisely control the amplitude and phase, thereby affecting the scanning quality; the current way to eliminate crosstalk has a specially designed waveguide array, but these technologies rely on the accuracy of the waveguide geometry, Difficult to be widely used in actual production
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0049] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0050] refer to figure 1 , figure 1 A schematic diagram of a top view structure of a wide body surface grating provided for an embodiment of the present invention; refer to figure 2 , figure 2 A schematic cro...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a wide-body surface grating and its antenna system, and a laser radar three-dimensional scanning system. The wide-body surface grating includes: one or two sets of waveguide arrays with multiple input waveguides, and alternately arranged along the input waveguide direction The first grating part and the second grating part; in the direction perpendicular to the plane where the wide body surface grating is located, the thickness of the first grating part is smaller than the thickness of the second grating part; wherein, when the waveguide When the number of arrays is two groups, the two groups of waveguide arrays are located on opposite sides. The wide-body surface grating can shorten the distance between the radiation points excited by the spaced input waveguide, relax the requirement for the short distance between the waveguides, and avoid the interference of multiple gratings. The process is simple, the tolerance is high, and the light collection efficiency is high. While eliminating crosstalk, the outgoing direction of the light wave signal can also be controlled, and at the same time, different radiation patterns can be generated by changing the period of the grating on the wide body surface.
Description
technical field [0001] The invention relates to the technical field of optical device design, more specifically, to a wide-body surface grating and its antenna system, and a laser radar three-dimensional scanning system. Background technique [0002] Optical phased array is one of the basic scanning methods of lidar, and it is the main scanning method used by integrated lidar at present. [0003] In order to avoid grating lobes in the radiation diagram, the antenna spacing in the optical phased array needs to be smaller than the emission wavelength; for example, taking the communication band around 1550nm as an example, the antenna spacing needs to be less than 775nm; for the on-chip phased array , requiring a spacing of less than 775nm between the grating and the previous transmission waveguide. [0004] However, this will lead to crosstalk between different waveguides and different gratings, and it is difficult to precisely control the amplitude and phase, thereby affecti...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/12
CPCG02B6/12009G02B6/12011
Inventor 张璟
Owner 长沙思木锐信息技术有限公司