System and method for digital optical aberration correction and spectral imaging
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Solution Overview
Problem
Existing optical imaging systems face challenges in correcting optical aberrations up to the diffraction limit, with hardware-based adaptive optics being complex and costly, digital deblurring techniques limited by noise and unknown blur kernels, and light-field imaging failing to achieve diffraction-limited resolution due to angular and spatial resolution limitations.
Innovation Solution
An optical system comprising an optical imaging unit, wavefront imaging sensor unit, and control unit that processes raw digital data to perform digital aberration correction using the optical mutual coherence function, enabling diffraction-limited deblurring without light loss, and reconstructing images based on chromatic and chromatic field properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hardware-based adaptive optics systems are used to correct optical aberrations, then image quality can be improved, but system complexity and cost increase significantly
Solution Approach 1:
The patent replaces hardware-based adaptive optics systems with a digital aberration correction method that uses computational algorithms to correct optical aberrations. Instead of using physical wavefront sensors, deformable mirrors, and complex optical relays, the invention uses digital signal processing on captured images to achieve aberration correction, thereby eliminating the need for complex mechanical and optical components while maintaining image quality improvement
Solution Approach 2:
The patent creates a digital model or representation of the optical aberrations through captured images and uses computational algorithms to generate corrected image versions. By working with digital copies and representations of the optical field rather than physically modifying the optical path, the system achieves correction without the complexity of hardware adaptive optics
2Device complexity
If digital deblurring techniques are used to correct optical aberrations, then system complexity is reduced, but correction effectiveness is limited by noise and unknown blur kernels
Solution Approach 1:
The patent implements a feedback mechanism where the system captures images, analyzes the optical aberrations present, and uses this information to iteratively refine the deblurring process. The captured images provide feedback about the actual aberration state, allowing the algorithm to adapt and improve correction effectiveness rather than relying on predetermined or unknown blur kernels
Solution Approach 2:
The patent performs preliminary characterization of the optical aberrations by analyzing captured images before applying the deblurring correction. By first measuring or estimating the aberration parameters from the actual captured data, the system prepares the necessary correction information in advance, overcoming the limitation of unknown blur kernels
3Adaptability or versatility
If light-field imaging is used to capture angular information, then some aberration correction capability is provided, but diffraction-limited resolution cannot be achieved due to angular and spatial resolution limitations
Solution Approach 1:
The patent processes light-field data by transforming it into the spatial frequency domain using Fourier transforms, effectively moving from spatial domain processing to frequency domain processing. This dimensional transformation allows the system to separate and independently optimize spatial resolution and angular information, overcoming the fundamental trade-off that limits light-field imaging from achieving diffraction-limited resolution
Data Source
AI summary
There are provided systems and methods for digital optical aberration correction and spectral imaging. An optical system may comprise an optical imaging unit, to form an optical image near an image plane of the optical system; a wavefront imaging sensor unit located near the image plane, to provide raw digital data on an optical field and image output near the image plane; and a control unit for processing the raw digital data and the image output to provide deblurred image output, wherein the control unit comprises a storage unit that stores instructions and a processing unit to execute the instructions to receive the image input and the raw digital data of the optical field impinging on the wavefront imaging sensor and generate a deblurred image based on an analysis of the optical mutual coherence function at the imaging plane.