Calibrating Light Field Projection Systems Using Convex Reflective Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Light field projection systems often produce degraded 3D images due to offsets or defects during installation or fabrication, leading to lower quality light fields at certain viewing angles, necessitating calibration to ensure high-quality viewing experiences for multiple viewers at various positions.
Innovation Solution
A method for calibrating light field projection systems involving sequential scanning of convex reflective elements using a baseline intensity profile, detecting intensity profiles from multiple perspectives, and modifying the control system's operation to account for differences, ensuring optimal light field modulation and projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light field projection system is installed or fabricated, then the system can project light fields, but offsets or defects may cause degraded 3D images at certain viewing angles
Solution Approach 1:
The patent applies preliminary action by performing calibration measurements before actual light field projection. The system sequentially scans convex reflective elements and detects intensity profiles from multiple perspectives to establish baseline data, which is then used to pre-adjust the control system parameters. This preliminary calibration process identifies and corrects offsets and defects before they affect the quality of projected light fields at various viewing angles.
2Reliability
If calibration is performed to correct offsets and defects, then light field quality improves, but the calibration process requires sequential scanning from multiple perspectives which increases time and complexity
Solution Approach 1:
The calibration process is segmented into discrete sequential scanning steps, where the system scans convex reflective elements one after another from multiple predetermined perspectives. Each perspective provides specific calibration data for that viewing angle. This segmentation allows the system to efficiently collect comprehensive calibration data without requiring continuous or exhaustive scanning, reducing overall calibration time while maintaining accuracy across all viewing positions.
3Adaptability or versatility
If the control system is modified to account for intensity profile differences, then viewing quality from multiple perspectives improves, but the system complexity increases due to additional detection and comparison operations
Solution Approach 1:
The control system implements feedback by detecting intensity profiles from multiple perspectives, comparing these measured profiles against expected profiles, and using the differences to automatically adjust control parameters. The system modifies the control system operation based on feedback from the detection process, creating a closed-loop calibration mechanism that adapts to actual system performance and corrects deviations without requiring complex manual adjustments.
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 calibration method enhances the quality of light fields viewed from various angles, providing a high-resolution, high-quality 3D image experience for multiple viewers by adjusting for system offsets and defects, ensuring consistent performance across different viewing positions.
Implementation Method 1
detecting, using a light detector located at a first perspective relative to the screen and the projection unit, a first measured intensity profile of light reflected from the plurality of convex reflective elements
Implementation Method 2
detecting, using a light detector located at a first perspective relative to the screen and the projection unit, a first measured intensity profile of light reflected from the plurality of convex reflective elements
Data Source
AI summary
The present disclosure relates to methods for calibrating a light field projection system that includes a screen having convex reflective elements. One example method for calibrating a light field projection system includes scanning the plurality of convex reflective elements with light modulated according to a baseline intensity profile. The method also includes detecting a light intensity profile of the scanned light using a light detector at a first perspective. The method further includes comparing the detected light intensity profile to an expected light intensity profile and modifying operation of a control system that determines light field modulation schemes for projecting light fields to account for any differences between the detected intensity profile and the expected intensity profile. The detector may be moved to a second perspective and the previously steps of the method may be repeated from the second perspective of the light detector.