Switchable Structured Illumination Generator for Depth Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional object tracking methods based on structured illumination face limitations in obtaining accurate depth information due to static structured light patterns, which restrict enhanced tracking range and accuracy.
Innovation Solution
A switchable structured illumination generator incorporating a polarization hologram and a polarization switch, allowing the system to switch between different structured light patterns by controlling the polarization hologram's state and the switch's operation, enabling advanced multi-shot imaging techniques for comprehensive object tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a static structured light pattern is used for object tracking, then the system structure is simple, but the tracking range and accuracy are limited
Solution Approach 1:
The patent applies the dynamics principle by implementing a switchable structured illumination generator that can dynamically change between multiple structured light patterns (e.g., different fringe projections) rather than using a static pattern. This allows the system to adapt its illumination configuration based on tracking requirements, thereby extending the effective tracking range and improving depth reconstruction accuracy through multi-shot imaging techniques
2Ease of operation
If a static structured light pattern is used, then the device is simple to operate, but the tracking range is restricted
Solution Approach 1:
The patent implements multi-functionality by designing a structured illumination system capable of generating multiple different light patterns through the switchable illumination generator. This universal capability allows the same hardware system to perform various tracking tasks with different requirements (e.g., close-range high-precision tracking vs. wide-range tracking) by switching between appropriate patterns, thereby extending adaptability without requiring multiple separate systems
3Measurement precision
If multiple structured light patterns are implemented for enhanced tracking, then tracking accuracy improves, but device complexity increases
Solution Approach 1:
The patent applies the merging principle by integrating the multi-pattern generation capability directly into the illumination generator itself through the switchable structured illumination generator. Rather than requiring separate projectors or complex external modulation systems, the patent combines multiple pattern generation functions within a single integrated device, reducing overall system complexity while maintaining the ability to implement advanced multi-shot imaging techniques for improved depth reconstruction
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
The solution enhances tracking range and accuracy by providing adaptable structured light patterns, facilitating the capture of comprehensive object information and improving depth reconstruction.
Implementation Method 1
a light guide configured to guide a light to propagate inside the light guide via total internal reflection
Implementation Method 2
The reflective lens is configured to reflect the stray light toward the light absorption layer
Implementation Method 3
The light absorption layer is configured to substantially absorb the stray light
Implementation Method 4
The anti-reflection coating is configured to substantially transmit the stray light toward the light absorption layer
Data Source
AI summary
A device includes a light guide configured to guide a light to propagate inside the light guide via total internal reflection. The device also includes a reflective lens disposed at a first surface of the light guide. The device further includes a light absorption layer disposed at a second surface of the light guide that is non-parallel to the first surface. The device further includes an out-coupling element configured to couple a first portion of the light out of the light guide as one or more output lights, a second portion of the light that is not coupled out of the light guide becoming a stray light propagating inside the light guide toward the second surface. The reflective lens is configured to reflect the stray light toward the light absorption layer. The light absorption layer is configured to substantially absorb the stray light.