Multi-Wavelength Ghost Imaging Processing for Faster Optical Measurement
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Solution Overview
Problem
Ghost imaging (GI) is generally time-consuming and requires improvements for real-time inspection, particularly when multiple wavelengths are involved.
Innovation Solution
A method and apparatus that projects multiple wavelengths simultaneously, processes detection signals without positional information, and applies standardization transformations to reconstruct images efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ghost imaging is used to achieve high detection sensitivity, then measurement accuracy is improved, but measurement time increases
Solution Approach 1:
The patent combines multiple wavelengths into a single composite illumination light that illuminates the measurement object simultaneously. By merging multiple wavelength components into one illumination source, the system achieves ghost imaging with enhanced detection sensitivity while reducing measurement time, as all wavelength data is captured in a single measurement cycle rather than sequentially.
Solution Approach 2:
The patent enables continuous acquisition of ghost imaging data across multiple wavelengths by using simultaneous multi-wavelength illumination. The composite illumination light maintains continuous measurement across all wavelength components, eliminating the need to switch between wavelengths and ensuring uninterrupted data collection for improved efficiency.
2Productivity
If multiple wavelengths are used simultaneously to speed up ghost imaging, then measurement speed is improved, but light source intensity control becomes more complex
Solution Approach 1:
The patent employs a single light source that simultaneously provides multiple wavelength components, making the illumination system multi-functional. This universal light source eliminates the need for separate intensity control mechanisms for each wavelength, as one illumination system serves all wavelength requirements, thereby simplifying the overall control architecture.
Solution Approach 2:
The composite illumination light inherently contains multiple wavelength components that automatically illuminate the measurement object without requiring external coordination or adjustment. The system self-regulates by utilizing the natural spectral composition of the light source, reducing the need for complex active control mechanisms.
3Measurement precision
If sequential projection of single-wavelength pattern lights is used, then image reconstruction accuracy is improved, but processing time increases
Solution Approach 1:
The patent merges multiple wavelength measurements into a single simultaneous acquisition by using composite illumination light. Instead of sequentially projecting pattern lights at different wavelengths, the system combines all wavelength components into one illumination event, capturing complete spectral information in parallel and enabling faster image reconstruction without sacrificing accuracy.
Solution Approach 2:
The patent transitions from sequential single-wavelength measurement to simultaneous multi-wavelength measurement by adding the wavelength dimension to the illumination process. This dimensional expansion allows the system to collect data across multiple wavelengths at the same time, effectively converting a time-sequential process into a spatially-parallel process.
Data Source
AI summary
According to the embodiment, a processing apparatus includes a processor. The processor is configured to: cause a plurality of different projection lights to be projected onto an object, the projection lights respectively including a plurality of wavelengths different from each other; cause intensity values of the plurality of wavelengths to be acquired from the object for each of the projection lights, as intensity values of detection signals having no information regarding position at a stage of processing signals; transform numerical values of the intensity values of the detection signals using independent parameters for each of wavelengths to first transformed signals corresponding to the plurality of wavelengths from the object; and cause an image of the object to be acquired by the first transformed signals corresponding to the plurality of wavelengths from the object and signals related to the projection lights.