Multispectral Camera Zero-Mode Channel Polarization Detection
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Solution Overview
Problem
Conventional multispectral imaging systems lack the ability to detect additional useful optical information such as polarization or translucence scattering, relying on fixed filter properties and multiple sensors, which limits their versatility and data collection capabilities.
Innovation Solution
A multispectral imaging system utilizing the zero-mode channel to detect various optical properties, incorporating a slit, dispersive element, focusing optic, and filters to simultaneously capture spectral and non-dispersed radiation, allowing for the measurement of polarization and translucence, among other properties, using a single instrument.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional multispectral imaging systems use linear detectors and scanning mirrors to capture spectral images, then spectral imaging data can be obtained, but the system cannot detect additional optical information such as polarization or translucence scattering
Solution Approach 1:
The patent makes the imaging system universal by enabling it to perform multiple detection functions (spectral imaging, polarization detection, translucence scattering detection) through a single integrated optical path. The dispersive element can operate in different diffraction modes (first-order for spectral, zero-order for non-dispersed), allowing the same hardware to capture different optical properties without requiring separate dedicated systems for each function.
Solution Approach 2:
The patent utilizes parameter changes by switching the operational mode of the dispersive element between different diffraction orders. By changing the diffraction mode parameter from first-order to zero-order, the system transitions between spectral imaging and non-dispersed imaging functions. This parameter-based switching enables functional versatility without adding physical complexity.
2Adaptability or versatility
If multiple sensors and filters are used to produce multispectral images, then different spectral bands can be captured, but the filter properties are fixed at design time and cannot be easily modified to reconfigure the system
Solution Approach 1:
The patent creates a universal imaging system where a single sensor and filter combination can serve multiple purposes. By using the zero-mode channel of the dispersive element, the same imaging detector that captures spectral data can also capture non-dispersed radiation for polarization and translucence measurements, eliminating the need for multiple dedicated sensors and filter sets.
Solution Approach 2:
The patent merges the spectral imaging function and the non-dispersed imaging function into a single optical path and detector system. The imaging detector simultaneously receives both spectrally dispersed radiation (from first-order diffraction) and non-dispersed radiation (from zero-order diffraction), combining multiple detection capabilities in one integrated system rather than using separate systems for each function.
3Loss of information
If the zero-mode channel is utilized to detect optical properties, then enhanced data cubes with additional optical property information can be collected, but the system requires reconfiguring filters to adapt to different imaging functions
Solution Approach 1:
The patent makes the imaging system universal by enabling it to perform multiple detection functions (spectral imaging, polarization detection, translucence scattering detection) through a single integrated optical path. The dispersive element can operate in different diffraction modes (first-order for spectral, zero-order for non-dispersed), allowing the same hardware to capture different optical properties without requiring separate dedicated systems for each function.
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 the collection of enhanced data cubes with additional optical property information, improving the system's utility and data quality by reconfiguring the filter to adapt to different imaging functions without requiring significant modifications to the optical train.
Implementation Method 1
a dispersive element configured to receive and spectrally disperse the incident electromagnetic radiation into its spectral components to provide spectrally dispersed electromagnetic radiation
Implementation Method 2
a focusing optic configured to focus the spectrally dispersed electromagnetic radiation onto an image plane
Implementation Method 3
a filter positioned between the focusing optic and the at least one imaging detector and configured to transmit at least a portion of the non-dispersed electromagnetic radiation to the at least one imaging detector
Data Source
AI summary
A multispectral imaging system and method in which the zero-mode channel is used to provide imaging of any of a variety of optical properties. In one example an imaging method includes spectrally dispersing received electromagnetic radiation into its spectral components with a dispersive element to produce spectrally dispersed electromagnetic radiation, transmitting the electromagnetic radiation through the dispersive element to produce non-dispersed electromagnetic radiation corresponding to a zero order diffraction mode of the dispersive element, imaging the non-dispersed electromagnetic radiation to produce a zero-mode image, and simultaneously imaging the spectrally dispersed electromagnetic radiation to produce a spectral image.