Holographic Object Relay for Light Field Display Depth Correction
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Solution Overview
Problem
Current technologies that claim to display holograms, such as lenticular printing and Pepper's Ghost, fail to stimulate the human visual sensory response effectively, lacking the depth perception and realism of true holographic imagery.
Innovation Solution
A holographic display system that uses a light field display to project light along specific paths, forming holographic surfaces, and a relay system to redirect these light paths, creating a perceived depth profile intended for the viewer, with a corrective optical element to reverse angular coordinates and maintain the intended depth order.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light field display projects light to form holographic surfaces, then holographic imagery is created, but the depth profile is distorted and does not match the intended depth perception
Solution Approach 1:
The controller pre-calculates and pre-distorts the light field parameters before projection, accounting for the relay system's optical characteristics. By applying the inverse of the expected distortion in advance, the system ensures that after relay transmission, the holographic surface restores to the intended depth profile, thereby resolving the depth perception distortion without loss of information
Solution Approach 2:
The system incorporates a feedback mechanism where the controller continuously monitors the relayed light paths and adjusts the light field projection parameters in real-time. This closed-loop control ensures that the depth profile distortion is compensated dynamically, maintaining accurate depth perception despite variations in the relay system's optical path
2Adaptability or versatility
If a relay system redirects light paths to create holographic surfaces, then the holographic image is formed at the desired location, but the depth order is reversed
Solution Approach 1:
The controller applies an inverse transformation to the light field parameters, deliberately reversing the angular coordinates in the opposite manner of the relay system's distortion. This double inversion approach ensures that the relayed holographic surface restores the correct depth order while maintaining the desired image location, effectively canceling out the depth reversal effect
Solution Approach 2:
The system dynamically changes the angular coordinates and light path parameters based on the relay system's optical characteristics. By adjusting these parameters in real-time, the controller compensates for the depth order reversal caused by the relay system, ensuring that the final holographic image presents the correct depth sequence to the viewer
3Productivity
If the light field display outputs projected light according to a first 4D function, then light paths are defined, but the relay system's second 4D function causes coordinate system mismatch
Solution Approach 1:
The controller acts as an intermediary coordinate transformation system between the light field display's first 4D coordinate system and the relay system's second 4D coordinate system. It performs real-time coordinate conversion and parameter mapping, translating the light path definitions from one coordinate system to the other while maintaining geometric accuracy, thereby resolving the coordinate system mismatch without sacrificing productivity or precision
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 system effectively relays holographic surfaces to a virtual screen plane, providing a realistic and depth-perceptible holographic image to the viewer, overcoming the limitations of existing technologies by maintaining the intended depth order and enhancing viewer experience.
Implementation Method 1
project light along a set of projected light paths to form at least a first holographic surface
Implementation Method 2
relay the received light along a set of relayed light paths
Implementation Method 3
relay the received light along a set of relayed light paths such that points on the first holographic surface are relayed to relayed locations
Implementation Method 4
reverse the polarity of the angular coordinates of each of the set of relayed light paths such that the first and second relayed holographic surfaces are perceivable with a corrected depth order
Data Source
AI summary
Relay systems and methods are operable to redirect light corresponding to a light field or holographic object such that imagery generated by a light field or other display is perceived by a viewer without having to address the display itself.