Ranging Apparatus Scanning Field of View Control
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Solution Overview
Problem
Existing ranging technologies have limited flexibility in controlling the scanning field of view (FOV), requiring high-cost aperture adjustments and complex control systems to achieve a large FOV, which restricts their application in various scenarios.
Innovation Solution
A ranging apparatus and method that utilizes at least three optical elements to control the scanning FOV by adjusting rotation speeds and initial phases, allowing for dynamic control of scan patterns, positions, and densities to extend the FOV effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If aperture sizes of light source and scan device are increased to obtain large FOV, then field of view is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies dynamics by making the optical elements rotatable rather than fixed, allowing the FOV to be dynamically adjusted through rotation speeds and initial phases. This enables a single compact system to achieve multiple FOV configurations without requiring large fixed apertures or complex mechanical structures.
Solution Approach 2:
The patent changes operational parameters (rotation speeds and initial phases of optical elements) to control the scanning FOV. By varying these parameters, the system can dynamically adjust the FOV without physical reconfiguration, avoiding the need for large aperture sizes and complex control systems.
2Area of stationary object
If separate scan dimensions are used to increase coverage area, then field of view is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple scanning functions into a single integrated system using three optical elements that work together. Instead of requiring separate scan dimensions with independent control systems, the combined operation of the three rotatable optical elements achieves comprehensive coverage area with simplified control.
Solution Approach 2:
Each optical element serves multiple functions: they collectively control scan patterns, positions, densities, and extension directions of the FOV. This multi-functionality eliminates the need for separate dedicated components for each scanning parameter, reducing overall device complexity.
3Manufacturing precision
If light source aperture is increased to change scan pattern, then scanning density is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses dynamic rotation of optical elements to control scan density rather than relying on fixed aperture sizes. By adjusting rotation speeds, the system can achieve variable scanning densities without requiring precise manufacturing of large apertures, making the system easier to manufacture while maintaining high scan density capability.
Data Source
AI summary
A method for controlling a scanning field of view (FOV) of a ranging apparatus includes emitting a light pulse sequence, changing the light pulse sequence to exit at different direction via at least three optical elements, wherein controlling the scanning FOV by controlling the at least three optical elements including at least one of controlling at least one of a scan patterns, a position, or a scanning density of the scanning FOV by controlling rotation speeds of the at least three optical elements, and/or controlling an extension direction of the scanning FOV by controlling initial phases of the at least three optical elements.