Snapshot Polarized Hyperspectral Camera Tiled Sensor
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Solution Overview
Problem
Conventional imaging spectrometers face difficulties in capturing detailed spectral information from rapidly changing scenes due to limitations in technology.
Innovation Solution
A snapshot-type polarized hyperspectral camera is developed, incorporating polarizers and a spectra filter integrated on a tiled pixel array image sensor, allowing for the capture of light signals with different polarizing angles and conversion into high-frequency electric signals, enabling detailed spectral imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional imaging spectrometers are used, then spectral imaging can be achieved, but imaging of rapidly changing scenes is difficult and detailed spectral information cannot be captured
Solution Approach 1:
The image sensor is divided into multiple channels, with each channel further segmented into multiple regions. Different polarizers are placed in different regions to capture light signals with different polarizing angles simultaneously, enabling parallel acquisition of spectral information across multiple dimensions without temporal sequencing delays
Solution Approach 2:
The patent introduces polarization angle as an additional dimension for spectral acquisition. By placing polarizers at different angles (0°, 60°, 120°) in different regions of the same channel, the system captures spectral information along the polarization dimension, thereby enriching the spectral data without requiring sequential measurements that would miss rapidly changing scenes
2Measurement precision
If multiple polarizers are placed in different regions of the image sensor, then detailed spectral information with different polarizing angles can be captured, but device complexity increases
Solution Approach 1:
Multiple functional components are merged into a single integrated sensor module. The image sensor simultaneously performs spatial imaging, spectral discrimination through wavelength-selective channels, and polarization angle discrimination through region-specific polarizers, eliminating the need for separate optical paths or sequential measurement systems
Solution Approach 2:
Each channel in the image sensor serves multiple functions: it acts as a wavelength-selective spectral channel, contains multiple polarized regions for polarization discrimination, and contributes to both spatial and spectral-polarization imaging. This multi-functionality reduces the overall system complexity by consolidating what would otherwise require separate subsystems
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 solution allows for precise imaging of rapidly changing scenes, enhancing object recognition and classification, with significant implications for industrial, medical, and security applications by capturing detailed spectral features.
Implementation Method 1
three polarizers are stuck into a first region, a second region and a third region of a channel with a preset wavelength at a first preset angle, a second preset angle and a third preset angle, respectively, the channel is divided into four regions, and the polarizers are used to shield and transmit incident light, so as to obtain light signals with different polarizing angles
Implementation Method 2
the image sensor is used to receive the light signals with different polarizing angles, which are obtained by the three polarizers, and convert the light signals with different polarizing angles into electric signals
Implementation Method 3
The spectra filter is used to receive the electric signals converted by the image sensor, and filter the electric signals, so as to obtain high-frequency electric signals with the preset wavelength
Data Source
AI summary
Disclosed are a snapshot-type polarized hyperspectral camera and an imaging method. The camera comprises polarizers (11), an image sensor (12), and a spectra filter (13). The spectra filter (13) is located on the image sensor (12). The polarizers (11) are located on one side of the image sensor (12). The method comprises: shielding and transmitting incident light by means of polarizers (11), so as to obtain light signals (101) with different polarizing angles; receiving, by means of an image sensor (12), the light signals with different polarizing angles, which are obtained by the polarizers (11), and converting the light signals with different polarizing angles into electric signals (102); and receiving, by means of a spectra filter (13), the electric signals converted by the image sensor (12), and filtering the electric signals, so as to obtain high-frequency electric signals (103) with a preset wavelength. By integrating a spectra filter (13) on a tiled pixel array of a sensor, a rapidly changing scene can be imaged; and meanwhile, by sticking a plurality of polarizers (11) into each channel with a specific wavelength, more exquisite imaging is realized.