OSL Data Storage Density via Super-Resolution Signal Separation
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Solution Overview
Problem
Conventional optical disc data storage technologies are limited by the size of read and write beams, restricting the data density and efficiency of data storage.
Innovation Solution
The use of optically stimulated luminescence (OSL) and super resolution techniques, combined with a probe beam that extends over multiple data markers, allows for increased data storage density by detecting mixed response illumination signals and determining data values using computational methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional reading laser beam is used to extract data from physical features on an optical disc, then the data can be read with existing technology, but the data storage density is limited by the beam size
Solution Approach 1:
The patent segments the data storage medium into an array of individually addressable data markers arranged in a grid pattern, where each marker can be independently written and read. This segmentation allows the probe beam to selectively illuminate specific regions containing multiple data markers, enabling high-density storage by packing more markers per unit area than conventional continuous track methods
Solution Approach 2:
The patent transitions from conventional one-dimensional spiral or circular track storage to a two-dimensional array of data markers arranged in rows and columns. This dimensional change allows the probe beam to access multiple data markers simultaneously by illuminating a two-dimensional region, dramatically increasing storage density beyond the limitations of linear track following
2Quantity of substance
If the beam area is reduced to increase data density, then more data can be stored in the same area, but the signal-to-noise ratio deteriorates
Solution Approach 1:
The patent merges the signals from multiple data markers by illuminating them simultaneously with a probe beam that covers a region containing several markers. The detector collects the combined response illumination from all illuminated markers, and computational methods separate the individual marker values from this merged signal, maintaining signal strength while increasing density
Solution Approach 2:
The patent uses computational copying and reconstruction methods where the individual data marker values are mathematically extracted from the combined detector signal. By treating the detector response as a superposition of individual marker responses and solving the inverse problem, the system recovers individual data values without physically isolating each marker's signal
3Productivity
If a probe beam extends over multiple data markers to increase storage density, then more data can be accessed simultaneously, but the complexity of determining individual data values increases
Solution Approach 1:
The patent replaces complex optical mechanical systems that would physically isolate or sequentially scan individual data markers with a computational approach. Instead of using multiple separate beams or complex scanning mechanisms, a single probe beam illuminates multiple markers and computational algorithms extract individual values from the combined signal, simplifying the physical system while increasing capability
Solution Approach 2:
The patent changes the parameter of data marker arrangement from conventional continuous tracks to a discrete grid array with specific spacing and positioning. This parameter change enables the use of computational methods that exploit the known geometric relationships between markers to mathematically separate their signals, transforming an intractable signal separation problem into a solvable linear algebra problem
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
This approach significantly enhances data storage density beyond conventional limits while maintaining signal-to-noise ratio, enabling orders of magnitude improvement in data storage capacity.
Implementation Method 1
an optically stimulated luminescence (OSL) storage medium including an array of OSL data markers situated to illuminate in response to optical stimulation
Data Source
AI summary
A method includes directing a probe beam to a target that includes an array of data portions in a data storage medium arranged so that a beam area of the probe beam extends across a plurality of adjacent data portions, the array including a data portion subset with each data portion of the subset responsive to the probe beam to produce a response illumination, receiving the response illumination at a detector, and determining data values corresponding to the plurality of adjacent data portions based on the received response illumination. Apparatus and systems are also disclosed.