3D Holographic Display Optical System with Nested Mirrors
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Solution Overview
Problem
Current optical systems for displaying three-dimensional images lack a compact structure capable of effectively magnifying and displaying holograms with reality, often resulting in large sizes and chromatic aberrations.
Innovation Solution
An optical system comprising a changing mirror, rotating mirror, tilted mirror, planar mirror, and concave mirror, along with a color composite prism and focusing lens, arranged in a configuration that changes the light path from horizontal to vertical, minimizing chromatic aberrations and allowing for a compact structure by reducing the total height, using materials like aluminum for the rotating mirror and anti-reflective coatings on the planar window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional optical systems are used for displaying three-dimensional images, then the system can display holograms, but the system size becomes large and chromatic aberrations occur
Solution Approach 1:
The patent changes the light path direction from horizontal to vertical using the changing mirror, effectively utilizing the vertical dimension to compact the optical system. This dimensional transition allows the system to achieve a reduced total height while maintaining the necessary optical path length for hologram display, resolving the contradiction between system size and display capability
Solution Approach 2:
The patent employs a nested arrangement where the tilted mirror is positioned within the central region of the concave mirror, and the planar mirror is arranged to allow light passage through its central hole. This nesting strategy enables multiple optical components to occupy overlapping spatial volumes, significantly reducing the overall system footprint while maintaining functional integrity and minimizing chromatic aberrations
2Reliability
If the rotating mirror has a large diameter to handle the optical path, then the optical system can process light effectively, but the rotating mirror becomes vulnerable to damage
Solution Approach 1:
The patent divides the optical path handling into multiple segments using different mirrors. The rotating mirror with smaller diameter handles only the vertical light path segment, while the tilted mirror and planar mirror handle other segments. This segmentation allows the rotating mirror to be smaller and more durable while the system as a whole maintains effective light processing capability through the coordinated action of multiple components
Solution Approach 2:
The patent introduces the tilted mirror as an intermediary component that receives light from the rotating mirror and redirects it to the planar mirror. This intermediary arrangement allows the rotating mirror to operate with a smaller, more durable diameter while the tilted mirror mediates the optical path to maintain the system's overall light processing effectiveness
3Ease of operation
If the optical system uses a horizontal arrangement, then the light path is straightforward, but the total height of the system increases
Solution Approach 1:
The patent transitions the light path from a horizontal arrangement to a vertical arrangement using the changing mirror. This dimensional change allows the system to achieve a compact total height suitable for user observation while the subsequent mirror arrangements (tilted mirror, planar mirror) maintain light path effectiveness by properly directing light through the vertical space
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 efficiently displays magnified holograms as three-dimensional images with reduced chromatic aberrations and a compact design, minimizing damage to the rotating mirror due to its smaller diameter and ensuring a lower total height for user observation.
Implementation Method 1
The changing mirror may be configured to change a path of a light from a horizontal direction to a vertical direction after the light passes through a spatial light modulator
Implementation Method 2
The rotating mirror may be configured to rotate with an X-axis and a Y-axis having different curvature radii
Implementation Method 3
The tilted mirror may include a central region including a hole for allowing the light to pass therethrough, and a peripheral region including one surface having a concave tilted structure
Implementation Method 4
The concave mirror may include a central region including a hole having a size capable of encompassing the tilted mirror, and a peripheral region having an entirely concaved bending structure
Implementation Method 5
the optical system may additionally include a color composite prism configured to synthesize R, G and B colors with the light passing through the spatial light modulator
Implementation Method 6
a focusing lens focusing the light after the light passes through the spatial light modulator
Data Source
AI summary
An example optical system for a 3D stereoscopic image display comprises a changing mirror, a rotating mirror, a tilted mirror, a concave mirror and a planar mirror. The changing mirror can change the path of light from a horizontal direction to a vertical direction. The rotating mirror can rotate while having an X-axis and a Y-axis with different curvature radii. The tilted mirror can include a central region with a hole for allowing light to pass therethrough, and a peripheral region having one surface having a concave tilted structure while the other surface has a planar structure. The concave mirror can include a central region with a hole having a size capable of encompassing the tilted mirror and a peripheral region having a bent structure that is completely concave. The planar mirror can include a central region with a hole and a peripheral region with a flat doughnut structure.