Measurement Device Pixel Segmentation for Holographic Accuracy
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Solution Overview
Problem
In digital holography, achieving high measurement accuracy is challenging due to the difficulty in effectively removing background light components from interference fringes, which affects the precision of three-dimensional shape measurement.
Innovation Solution
A measurement device with a pixel structure that includes a light receiver, multiple storage sections, and an electric charge supplying section, where the light receiver generates electric charge through photoelectric conversion, and the processor generates detection values based on the charge amounts stored in different sections to enhance measurement accuracy by selectively supplying and processing the electric charge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional single storage section pixels are used, then device complexity is low, but measurement precision deteriorates due to inability to effectively remove background light components
Solution Approach 1:
The pixel is divided into multiple storage sections (first storage section, second storage section, third storage section) that separately store electric charges corresponding to different light components (interference fringes, background light, direct light). This segmentation enables independent processing of each light component, allowing effective removal of background light and direct light components while preserving interference fringe information, thereby improving measurement accuracy without requiring complex external processing systems
Solution Approach 2:
The invention extracts and separates the background light component and direct light component from the total detected light signal by using dedicated storage sections. The first storage section stores charges from interference fringes plus background light, the second storage section stores charges from background light only, and the third storage section stores charges from direct light. By subtracting the charges from the second and third storage sections from the first storage section, the background light and direct light components are effectively removed, leaving only the interference fringe signal for accurate measurement
2Measurement precision
If multiple storage sections are introduced to remove background light, then measurement precision improves, but device complexity increases
Solution Approach 1:
The invention merges the background light detection function and direct light detection function within the same pixel structure that also performs interference fringe detection. By integrating multiple storage sections into each pixel, the system combines several measurement functions (interference fringe detection, background light detection, direct light detection) into a unified pixel unit, enabling comprehensive light component separation and removal without requiring additional separate detection devices or complex external processing systems
Solution Approach 2:
The light source emits light in periodic pulses, and the pixels perform photoelectric conversion and charge storage in synchronization with these pulses. The first storage section stores charges during the light emission period when interference fringes are present, while the second and third storage sections store charges during specific time windows corresponding to background light and direct light components. This periodic action enables temporal separation of different light components, allowing effective background light removal through subsequent charge subtraction
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 device improves measurement accuracy by effectively removing background light components and enhancing the detection of interference fringes, leading to more precise three-dimensional shape measurements.
Implementation Method 1
The light receiver is configured to generate received-light electric charge by performing photoelectric conversion on the basis of light
Data Source
AI summary
Provided is a measurement device that includes a pixel including a light receiver, a plurality of storage sections, and an electric charge supplying section. The light receiver generates received-light electric charge by performing photoelectric conversion on the basis of light. The plurality of storage sections stores the received-light electric charge and the plurality of storage sections includes a first storage section and a second storage section. The electric charge supplying section selectively supplies the received-light electric charge generated by the light receiver to the plurality of storage sections. The measurement device includes a processor that generates a first detection value on the basis of an electric charge amount of the received-light electric charge stored in the first storage section, and generates a second detection value on the basis of an electric charge amount of the received-light electric charge stored in the second storage section. The processor generates a first pixel value on the basis of a difference between the first detection value and the second detection value.