Waveguide Hologram Reconstruction in Compact Optical Blocks
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Solution Overview
Problem
There is a need for compact lighting devices that can efficiently reconstruct holograms in a small installation space.
Innovation Solution
A lighting device comprising a light source, optical element, and optical block with a coupling portion, waveguide portion, and holographic optical element, which guides light through multiple reflections to reconstruct a hologram with high efficiency and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional lighting devices are used for hologram reconstruction, then the installation space is large, but the compactness is poor
Solution Approach 1:
The patent combines the collimation function and hologram reconstruction function into a single integrated optical system. The collimating lens is positioned to receive light directly from the light source, and the holographic optical element is formed within the optical block that receives collimated light, creating a compact unified structure that reduces installation space while maintaining optical performance
Solution Approach 2:
The holographic optical element is formed inside the optical block, which itself is positioned within the lighting device housing. This nested arrangement allows the optical components to be space-efficiently organized, with the optical block containing the holographic element and both being integrated into the overall device structure, minimizing the total volume required
2Manufacturing precision
If light is transmitted directly without collimation, then the optical path is short, but the divergence of light is high causing poor hologram quality
Solution Approach 1:
The patent applies collimation locally at the critical point where light interacts with the holographic optical element. The collimating lens is positioned to create a localized region of parallel light rays that illuminates the holographic element, ensuring high-quality hologram reconstruction only where needed without requiring the entire optical path to be long
3Illumination intensity
If the optical block is positioned far from the light source, then the light divergence is reduced, but the device length increases
Solution Approach 1:
The patent transitions from a linear arrangement where distance from the light source determines collimation quality to a compact integrated structure. The collimating lens and optical block are positioned in a optimized spatial configuration that achieves effective collimation without requiring excessive length, utilizing three-dimensional space efficiently rather than extending linearly
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 device achieves high-quality hologram reconstruction with minimal optical losses and a compact structure, suitable for integration in space-restricted applications.
Implementation Method 1
an optical element arranged along the beam path and configured to reduce a divergence of the light
Implementation Method 2
The waveguide portion extends away from the coupling portion and is configured to guide the light by multiple reflections between a top side and a lower side of the waveguide portion
Implementation Method 3
the holographic optical element is formed in the waveguide portion and configured to reconstruct a hologram by means of the light
Data Source
AI summary
The lighting device comprises an optical block having a coupling portion with a coupling face which is arranged to couple light into the optical block and a waveguide portion extending away from the coupling portion and designed to guide the light by multiple reflection between an upper face and a lower face of the waveguide portion. The optical block also comprises a holographical optical element that is formed in the waveguide portion and is designed to reconstruct a hologram by means of the light.