Spatial-Coded Spectral Polarization Imaging for Distortion-Free Reconstruction
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Solution Overview
Problem
Existing coding-based spectral polarization integrated imaging systems suffer from imaging deviations and distortions due to reliance on post-algorithm correction, lacking integration with computational optics, which affects the accuracy and efficiency of target detection, recognition, and classification.
Innovation Solution
An interactive design method for a spectral polarization integrated imaging system using spatial dimension coding, incorporating a coded aperture, beam-splitting element, micro polarizer array detector, and reconstruction algorithm, to achieve real-time imaging with high accuracy by integrating optical design with computational optics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional spectrometer design method is used for coding spectral polarization integrated imaging, then the system can be constructed with available components, but imaging deviations and distortions occur due to lack of integration with computational optics
Solution Approach 1:
The patent merges optical design with computational optics by integrating the unmixing method-reconstruction algorithm-index optimization-optical design reverse workflow. This combines the computational processing chain with the optical system design, creating a unified approach that eliminates imaging deviations and distortions while maintaining system constructibility.
Solution Approach 2:
The patent applies preliminary action by using the reconstruction algorithm and unmixing method as prior knowledge in the optical design phase. The index optimization process performs preliminary calculations to determine optimal optical parameters before physical construction, ensuring high imaging accuracy from the start rather than requiring post-construction correction.
2Adaptability or versatility
If spatial dimension coding is implemented with multiple optical components, then spectral and polarization multi-dimensional characteristics can be obtained, but the system complexity increases
Solution Approach 1:
The patent implements universality by designing an optical system where a single integrated imaging system simultaneously captures spatial, spectral, and polarization information. The coded aperture system with beam-splitting element and micro polarizer array detector enables one system to perform multiple measurement functions that would traditionally require separate systems.
Solution Approach 2:
The patent applies the nested doll principle by integrating multiple functional components within a compact optical path. The beam-splitting element divides the optical path to simultaneously guide light to different detectors, while the micro polarizer array detector nests multiple polarization measurement capabilities within a single detector plane, reducing overall system complexity.
3Measurement precision
If post-algorithm correction is used to correct imaging deviations, then some accuracy can be recovered, but the detection efficiency and time consumption are reduced
Solution Approach 1:
The patent eliminates the need for post-algorithm correction by performing the unmixing and reconstruction operations during the data acquisition phase itself. The reconstruction algorithm processes the coded spectral polarization data in real-time, obtaining accurate imaging results without requiring separate post-processing correction steps, thus maintaining high detection efficiency.
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
The system enables real-time imaging with reduced errors and high information matching, enhancing detection accuracy and efficiency by integrating optical and computational components for polarization, spectrum, and spatial information processing.
Implementation Method 1
an objective lens, a filter, a digital mirror device (DMD), a primary mirror, a convex grating, the third mirror
Implementation Method 2
the filter filters out light in a non-working band before the light enters into the DMD
Implementation Method 3
the DMD is disposed on a focal plane of the objective lens; the DMD is connected to the computer; the computer controls an encoding matrix loaded on the DMD to encode information
Implementation Method 4
the light is reflected to the primary mirror after being encoded by the DMD, and then the light is reflected by the primary mirror to the convex grating
Implementation Method 5
the light is reflected by the primary mirror to the convex grating for dispersion; the light subjected to the dispersion
Implementation Method 6
a convex grating, the third mirror
Implementation Method 7
the light subjected to the dispersion is then reflected to the third mirror
Implementation Method 8
an encoded image is produced on the micro polarizer array detector; polarization channel coding is completed by using a micro polarizer array on the micro polarizer array detector
Data Source
AI summary
A snapshot spatial dimension spectral polarization integrated imaging system and a design method thereof are provided. An objective lens generate an image of a target on a DMD; the DMD is disposed on a focal plane of the objective lens and connected to the computer; the computer controls an encoding matrix loaded on the DMD to encode information; the light is reflected to the primary mirror after being encoded, and then is reflected by the primary mirror to the convex grating for dispersion; the light is then reflected to the third mirror; an encoded image is produced on the micro polarizer array detector; polarization channel coding is completed; the micro polarizer array detector is connected to the computer; and the computer resolves compressive spectral polarization image based on spectral polarization coding data cube obtained on a target surface of the micro polarizer array detector.