Holographic Recording Medium Overlap Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Holographic recording technologies face challenges in optimizing light efficiency, achieving desired hologram pixel shapes, maximizing fill factor, shortening recording time, and increasing resolution, particularly in efficiently overlapping interference fringes between neighboring hologram pixels.
Innovation Solution
A method and apparatus for holographic recording that involves multiplexing-recording interference fringes between hologram pixels by moving the recording medium a distance less than the width of a recorded interference fringe and adjusting exposure time, allowing for partial overlap of neighboring pixels, thereby increasing the number of pixels on a given medium size and enhancing resolution without increasing total recording time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hologram pixels are recorded without overlap on a photosensitive recording film, then each pixel is clearly defined, but the resolution and pixel density are limited by the available medium size
Solution Approach 1:
The patent applies merging by overlapping multiple interference fringes from different hologram pixels at the same location on the photosensitive recording film. This allows multiple pixels to contribute to the same physical region, effectively increasing the number of resolvable pixels beyond what would be possible with non-overlapping arrangements.
Solution Approach 2:
The patent introduces a temporal dimension to the recording process by sequentially recording multiple hologram pixels at the same spatial location at different times. This time-multiplexed approach allows the system to pack more pixels into the same physical area by utilizing the time dimension for differentiation.
2Quantity of substance
If the recording medium is moved to record multiple hologram pixels sequentially, then pixel density increases, but the recording time increases proportionally
Solution Approach 1:
The patent merges multiple recording operations into a single spatial location by overlapping interference fringes. Instead of moving the recording medium through separate locations for each pixel, multiple pixels are recorded at the same location sequentially in time, reducing the physical travel distance and associated time losses.
Solution Approach 2:
The patent transitions from a spatial arrangement to a temporal arrangement by recording multiple hologram pixels at the same spatial coordinates at different times. This time-multiplexed recording reduces the need for physical medium movement, thereby decreasing total recording time while maintaining high pixel density.
3Manufacturing precision
If interference fringes of neighboring hologram pixels are overlapped, then resolution and pixel density increase, but light efficiency decreases due to shared exposure
Solution Approach 1:
The patent merges the optical paths of multiple hologram pixels by directing their interference fringes to overlap at the same location on the recording medium. This allows the system to achieve high resolution through temporal multiplexing rather than spatial separation, though it requires careful control of exposure timing to manage light efficiency.
Solution Approach 2:
The patent employs periodic action by sequentially activating different hologram pixel patterns in time, with each pattern being recorded during a specific time interval. This time-division multiplexing allows multiple pixels to share the same physical recording location while maintaining distinguishable interference fringes through temporal separation.
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 method achieves higher resolution and shorter recording time per hologram pixel, allowing for visually identifiable improvements in image quality and increased pixel density without prolonging the overall recording process, making it less sensitive to stage movement vibrations.
Implementation Method 1
recording an interference fringe between a reference beam and a signal beam
Implementation Method 2
irradiating the signal beams and the reference beams to the same part of a photosensitive recording film
Data Source
AI summary
Provided is a holographic recording method in which an interference fringe between a reference beam and a signal beam, modulated according to information regarding a plurality of hologram pixels, is recorded on a holographic recording medium, the holographic recording method including multiplexing-recording the interference fringe of the plurality of hologram pixels such that at least a part of the interference fringe recorded of neighboring hologram pixels of the plurality of hologram pixels is overlapped.