3D Volumetric Projection With Sliding Fold and Curved Mirrors
Solution Overview
Problem
Current three-dimensional video projection systems face challenges with increased size, weight, cost, and limited viewing angles due to larger components, and low brightness of projected light.
Innovation Solution
A 3D volumetric image projection system incorporating a housing, optical fold mirror, and a curved mirror, with a robotic arm and transparent display, allowing for adjustable positioning and projection of 3D images without glasses, and supporting interactive features like haptic feedback and eye tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If larger components (liquid crystal display, beam splitter, mirror) are used to increase the size of the projected image, then the image size is improved, but the overall system size, weight, and cost increase
Solution Approach 1:
The patent employs a curved mirror (parabolic or hyperbolic geometry) to project the image in three-dimensional space rather than on a flat plane. This dimensional transformation allows the image to be projected outward in volumetric space, achieving large image size without requiring proportionally large planar components. The optical fold mirror further manipulates the light path in multiple dimensions to achieve compact system geometry.
Solution Approach 2:
The patent replaces traditional mechanical projection components (large liquid crystal display, beam splitter, flat mirrors) with an acoustic field-based holographic projection system. The acoustic hologram uses sound wave interference patterns to create three-dimensional images, eliminating the need for large mechanical optical components while achieving enhanced image size and viewing angles.
2Adaptability or versatility
If traditional projection systems are used, then the system structure is simple, but the viewing angle is limited to a narrow range
Solution Approach 1:
The curved mirror projects the image into three-dimensional space, creating a volumetric holographic display that can be viewed from multiple angles around the projected object. This spatial transformation from 2D plane to 3D volume inherently expands the viewing angle without requiring complex multi-element optical systems.
Solution Approach 2:
The optical fold mirror is configured to slide on a track to adjust its axial position dynamically. This dynamic adjustment capability allows the system to optimize the projection geometry and viewing angle based on different operational requirements, providing adaptability without permanent structural complexity.
3Adaptability or versatility
If the optical fold mirror is fixed in position, then the system structure is simple, but the image projection flexibility and focus adjustment are limited
Solution Approach 1:
The optical fold mirror is mounted on a sliding mechanism that allows it to move along a track to adjust its axial position. This dynamic positioning capability enables focus adjustment and optimization of the projection geometry. The mechanical structure remains relatively simple, using basic linear motion guidance rather than complex multi-axis positioning systems.
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
Enables larger 3D image projection without increasing system size, provides interactive user experiences, and allows viewing from various angles, enhancing user engagement and accessibility.
Implementation Method 1
an optical fold mirror configured to slide on the track to adjust at least an axial position of the optical fold mirror within the housing
Implementation Method 2
a curved mirror (e.g., an off-axis concave mirror) configured to receive reflected light from the optical fold mirror and project a three-dimensional image outside of the housing
Data Source
AI summary
A 3D volumetric image projection system includes a housing, a track positioned in the housing, an optical fold mirror configured to slide on the track to adjust at least an axial position of the optical fold mirror within the housing, and a curved mirror configured to receive reflected light from the optical fold mirror and project a three-dimensional image outside of the housing.