Spatial Light Modulator Spectroscopy with Pixel Group Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current spatial light modulator (SLM) spectroscopy methods require the entire device to load data for each frequency measurement, leading to inefficiencies as only a small portion of mirrors are involved, making the process time-consuming and less precise due to low detectability of light from a few mirrors.
Innovation Solution
The implementation of groups of pixels in the SLM, each controlled by a respective reset signal, allowing only selected portions of the light spectrum to be transmitted while blocking unselected portions, enabling faster and more precise measurements by utilizing multiple reset zones to direct specific frequencies to a photodetector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire DMD loads data to direct mirrors for each frequency measurement, then all mirrors can be controlled, but measurement time increases and precision decreases due to low detectability
Solution Approach 1:
The patent divides the DMD into multiple independently controllable zones or groups of mirrors. Each zone can be controlled separately to direct specific frequency ranges to the detector. This segmentation allows only the necessary portion of mirrors to be active for each measurement, improving detection precision by concentrating light on the detector while reducing measurement time by avoiding the need to load data for all mirrors.
2Loss of time
If only a small portion of mirrors are used for each frequency measurement, then data loading time is reduced, but detection precision decreases due to low light detectability
Solution Approach 1:
The patent combines multiple mirror zones to work together for detecting specific frequency ranges. By merging the output of multiple mirrors into a single detection path, the system maintains sufficient light intensity for precise detection while using only a subset of total mirrors, thus reducing data loading time without sacrificing detection precision.
3Adaptability or versatility
If the entire DMD is used for each measurement, then all frequencies can be addressed, but the process becomes time-consuming and less precise
Solution Approach 1:
The patent implements dynamic control of mirror zones where different groups of mirrors can be activated or deactivated based on the specific measurement requirements. This dynamic allocation allows the system to adaptively cover different frequency ranges using only the necessary mirrors, maintaining frequency coverage versatility while significantly improving measurement speed by avoiding unnecessary data loading for inactive zones.
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 configuration significantly reduces measurement time and increases precision by allowing multiple frequency measurements simultaneously, achieving approximately n times faster results than traditional methods, where n is the number of reset groups in the SLM.
Implementation Method 1
The DMD addresses the mirrors to direct light of a selected frequency onto a detector
Implementation Method 2
The detector receives and measures the light
Data Source
AI summary
In described examples, a spatial light modulator includes groups of pixels. Each group is arranged to transmit only a respective portion of a light spectrum. The respective portion has a respective dominant color. The respective portions of the light spectrum are distinct from one another, according to their respective dominant colors. Each group is controlled by a respective reset signal. The spatial light modulator is coupled to receive a selection from the integrated circuit and in response to the selection: cause a selected one of the groups to transmit its respective portion of the light spectrum; and cause an unselected one of the groups to block transmission of its respective portion of the light spectrum. A photodetector is coupled to: receive the respective portion of the light spectrum transmitted by the selected group; and output a signal indicating an intensity thereof.