Multispectral Sensor Optical Channels for Frame Rate
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Solution Overview
Problem
Multispectral sensor devices face a reduction in frame rate due to decreased optical power reaching sensor elements, which is caused by bandpass filtering, making them inadequate for time-sensitive applications like health monitoring that require high sample rates.
Innovation Solution
Incorporating an array of optical channels with both bandpass filtered and broadband transparent components to allow more optical power to reach sensor elements, reducing acquisition integration time and increasing frame rate while maintaining spectral information capture capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bandpass filtering is applied to capture spectral information, then measurement precision is improved, but productivity deteriorates due to reduced frame rate
Solution Approach 1:
The sensor array is divided into multiple regions, each with dedicated optical channels having different filtering characteristics. Some channels use bandpass filters for spectral precision while others use broadband transparent components for high frame rate capture, allowing simultaneous operation of both modes without compromise
Solution Approach 2:
Different optical channels are assigned different filtering properties based on their functional requirements. Bandpass filtered channels provide spectral information where precision is critical, while broadband transparent channels provide high temporal resolution where speed is critical, optimizing performance locally for each channel's purpose
2Measurement precision
If bandpass filtering is applied to restrict spectral range, then measurement precision is improved, but loss of energy increases due to decreased optical power
Solution Approach 1:
The optical channel array is segmented into channels with different energy transmission characteristics. Broadband transparent channels preserve optical power for applications needing high signal strength, while bandpass filtered channels sacrifice some energy for spectral precision where needed
Solution Approach 2:
The filtering parameters of optical channels are varied across the array. Some channels maintain broadband transparency to maximize optical power transmission, while others implement bandpass filtering with specific spectral characteristics, allowing the system to adapt energy transmission parameters to functional requirements
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 enhances the ability of multispectral sensor devices to support time-sensitive applications by increasing optical power and frame rate, enabling them to capture spectral data efficiently for applications such as health monitoring.
Implementation Method 1
at least one other optical channel of the array of optical channels is configured to pass non-bandpass filtered light to at least one other sensor element
Implementation Method 2
at least one optical channel of the array of optical channels is configured to pass bandpass filtered light to at least one sensor element
Data Source
AI summary
An optical device may comprise an array of sensor elements and an array of optical channels disposed on the array of sensor elements. At least one optical channel of the array of optical channels may be configured to pass bandpass filtered light to at least one sensor element of the array of sensor elements. At least one other optical channel of the array of optical channels may be configured to pass non-bandpass filtered light to at least one other sensor element of the array of sensor elements.