Adaptive Spectral Sensor Using Programmable Spatial Light Modulator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current spectral sensors face challenges in efficiently discriminating target materials from background materials due to limitations in adaptability and accuracy, particularly in dynamic environments where target and background conditions evolve rapidly.
Innovation Solution
The development of an adaptive spectral sensor system that utilizes a programmable band pass transmission filter and spatial light modulator to generate contrast signals by encoding specific spectral and spatial filters, allowing for real-time adjustment of encoding masks to optimize target detection amidst changing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional spectral sensors are used to detect target materials, then detection capability is provided, but the ability to discriminate target materials from background materials deteriorates in dynamic environments where conditions evolve rapidly
Solution Approach 1:
The patent implements a programmable spatial light modulator that dynamically reconfigures spectral filters in real-time based on changing environmental conditions. The system adapts its spectral encoding patterns adaptively, allowing the sensor to optimize target discrimination capability as background conditions evolve, thereby resolving the contradiction between measurement precision and adaptability
Solution Approach 2:
The system changes spectral parameters by programmatically adjusting the spatial light modulator to create different spectral encoding patterns. This allows the sensor to modify its spectral response characteristics in real-time, improving target detection accuracy under varying environmental conditions while maintaining adaptability
2Measurement precision
If spectral encoding is used to discriminate target materials, then detection specificity is improved, but the complexity of the sensing system increases
Solution Approach 1:
The spatial light modulator serves multiple functions: it acts as a programmable spectral filter, a spatial encoder, and an adaptive element. This multi-functionality allows the system to achieve high spectral discrimination accuracy without proportionally increasing overall system complexity, as a single component performs multiple critical roles
Solution Approach 2:
The patent replaces traditional mechanical spectral filtering systems with a programmable spatial light modulator that uses electrical control to achieve spectral encoding. This substitution reduces mechanical complexity while maintaining or improving spectral discrimination capability through software-controlled patterns
3Measurement precision
If real-time adaptation to evolving conditions is implemented, then detection accuracy is maintained, but the processing time and system complexity increase
Solution Approach 1:
The system pre-programs the spatial light modulator with multiple spectral encoding patterns that can be rapidly switched based on detected environmental conditions. This preliminary preparation allows the system to adapt in real-time without extensive processing delays, as the adaptive responses are pre-configured and ready for immediate deployment
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
Enables accurate and efficient detection of target properties with minimal interference from background objects, achieving optimal signal-to-noise ratio and enabling real-time adaptation to evolving target and background conditions.
Implementation Method 1
first dispersing the light from a distant scene, encoding the light using a mask that selects specific combinations of wavelengths and/or spatial positions
Implementation Method 2
The programmable modulator provides the ability to encode arbitrary spatial or spectral patterns on each resolution element, and vary those patterns temporally
Implementation Method 3
recombining the light on a detector that records the encoded polychromatic signal
Data Source
AI summary
An adaptive spectral sensor, and methods of using the sensor. The sensor uses a programmable band pass transmission filter to produce both contrast signals, which discriminate specific target materials from background materials by comparing spectral signatures in hardware, and scene radiance spectra. The adaptive spectral sensor may measure one or more scene spectra and may form a spectral image. The sensor may automatically adjust to changing spectral, spatial and temporal conditions in the environment being monitored, by changing sensor resolution in those dimensions and by changing the detection band pass. The programmable band pass can be changed on-the-fly in real time to implement a variety of detection techniques in hardware or measure the spatial or spectral signatures of specific materials and scenes.