Solid-State LIDAR Steering via Optical Switching and Waveguide Redirection
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Solution Overview
Problem
Existing LIDAR systems face challenges in achieving a practical solid-state scanning mechanism with a wide angular range, as traditional methods require mechanical parts and have limited angular ranges.
Innovation Solution
The proposed solution involves an optical system with a LIDAR chip that includes a switch to direct outgoing LIDAR signals to multiple alternate waveguides, and a redirection component that steers the signals based on the waveguide selection, allowing for continuous steering within a field of view without moving parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical scanning methods (rotating mirrors, rotating assemblies) are used, then scanning functionality is achieved, but the system has moving parts which reduces reliability and limits solid-state integration
Solution Approach 1:
The patent replaces mechanical scanning components (rotating mirrors, moving assemblies) with a solid-state optical switching system. The system uses multiple waveguides and optical switches to direct light beams in different directions, eliminating moving parts while maintaining scanning functionality. This substitution of mechanical systems with optical/electronic systems resolves the contradiction by improving reliability through elimination of mechanical failure points.
2Device complexity
If traditional solid-state approaches are used, then the lack of moving parts is achieved, but the angular range is limited and the number of control elements increases
Solution Approach 1:
The patent divides the optical system into multiple waveguide channels, each capable of directing light in a specific direction. By segmenting the beam path into discrete waveguide routes with optical switches, the system achieves a wide angular range through coordinated control of multiple segments rather than requiring a single complex solid-state element. This segmentation allows independent control of each waveguide to achieve comprehensive angular coverage.
Solution Approach 2:
The patent extends the scanning capability from a single dimension to two dimensions by implementing a 2x2 optical switch configuration that controls both horizontal and vertical waveguide paths. This dimensional expansion allows the system to achieve wide angular ranges in multiple directions simultaneously, resolving the limitation of traditional single-dimension solid-state approaches.
3Speed
If mechanical scanning methods are used, then wide angular ranges can be achieved, but scanning speeds are limited due to mechanical inertia
Solution Approach 1:
The patent replaces mechanical scanning mechanisms with solid-state optical switching that uses electrical control signals to redirect light beams. This substitution eliminates mechanical inertia and moving parts, enabling scanning speeds limited only by the electrical switching speed rather than mechanical rotation speed, thereby simultaneously improving both scanning speed and reliability.
4Adaptability or versatility
If solid-state approaches with multiple control elements are used, then the angular range is improved, but the number of control elements increases system complexity
Solution Approach 1:
The patent implements a 2x2 optical switch where a single switching component performs multiple functions by directing light along different waveguide paths. Each optical switch controls multiple waveguides simultaneously, and the same waveguides can serve different scanning directions depending on the switch configuration. This multi-functionality reduces the total number of control elements needed compared to having separate control mechanisms for each direction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables a solid-state steering mechanism with a wide angular range, improving scanning speeds and efficiency while eliminating the need for mechanical components.
Implementation Method 1
a switch configured to direct an outgoing LIDAR signal to any one of multiple different alternate waveguides
Implementation Method 2
a redirection component configured to receive the outgoing LIDAR signal from any one of the alternate waveguides and redirect the received outgoing LIDAR signal
Data Source
AI summary
An optical system has a LIDAR chip that includes a switch configured to direct an outgoing LIDAR signal to one of multiple different alternate waveguides. The system also includes a redirection component configured to receive the outgoing LIDAR signal from any one of the alternate waveguides. The redirection component is also configured to redirect the received outgoing LIDAR signal such that a direction that the outgoing LIDAR signal travels away from the redirection component changes in response to changes in the alternate waveguide to which the optical switch directs the outgoing LIDAR signal.