Structured-Light Optical Apparatus for Regional Image Reconstruction
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Solution Overview
Problem
Conventional optical devices for material measurement are unable to obtain information on specific regions of an object, as they detect light containing information from the entire portion of the object.
Innovation Solution
An optical apparatus that structures light into multiple light and dark line patterns, modulates a predetermined region of the object using ultrasound or other methods, synchronizes light irradiation with ultrasound, and reconstructs a line image through cross-correlation operations between photodetector signals and light patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods are used to measure material characteristics, then the entire object information is detected, but specific region information cannot be obtained
Solution Approach 1:
The light beam is divided into multiple segmented beams that are directed to different regions of the object. Each segmented beam carries information about a specific region, allowing the detector to obtain spatially-resolved information by processing the segmented light signals separately
Solution Approach 2:
Different regions of the light beam are given different properties through spatial light modulation. The light beam is structured to have different intensity distributions or phase characteristics in different spatial regions, enabling selective detection of specific object regions with enhanced local measurement capability
2Measurement precision
If light is structured into multiple patterns to obtain specific region information, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The optical apparatus is designed with multi-functional components that can perform multiple operations. The spatial light modulator can generate various light patterns for different measurement needs, and the system can adapt to different object types and measurement requirements without requiring completely separate detection systems
Solution Approach 2:
A spatial light modulator is introduced as an intermediary component between the light source and the object. This mediator structures the light beam into desired patterns and can be controlled programmatically to achieve different measurement configurations, reducing the need for complex mechanical reconfiguration of the optical system
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 detection of specific region characteristics of an object by enhancing light modulation in regions where ultrasound and light intersect, allowing for precise information acquisition.
Implementation Method 1
a photodetector that detects, when an object is irradiated with the light emitted by the light source unit, light from the object
Implementation Method 2
a calculator that reconstructs a line image of the object by performing a cross-correlation operation between a signal outputted from the photodetector and a corresponding one of the plurality of light and dark line patterns
Data Source
AI summary
An optical apparatus includes: a light source unit that structures light into a plurality of light and dark line patterns and emits the light structured; a photodetector that detects, when an object is irradiated with the light emitted by the light source unit, light from the object; a modulator that modulates a predetermined region of the object; a controller that synchronizes the irradiation of the light emitted by the light source unit with the modulator; and a calculator that reconstructs a line image of the object by performing a cross-correlation operation between a signal outputted from the photodetector and a corresponding one of the plurality of light and dark line patterns.