Dual Light Receiving Elements Expand Dynamic Range
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Solution Overview
Problem
Existing imaging devices that expand dynamic range by using non-destructive readable imaging elements incur high manufacturing costs due to the need for multiple exposure time lengths and dedicated drive circuits.
Innovation Solution
A measuring device comprising a first and second light receiving element with different exposure time lengths and light sensitivities, performing weighted composition of their output values to expand dynamic range while reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If non-destructive readable imaging elements are used to acquire multiple pixel data items at different exposure time lengths, then dynamic range is expanded, but manufacturing cost increases
Solution Approach 1:
The imaging device is divided into multiple imaging elements, each dedicated to capturing image data at a specific exposure time length. This segmentation allows each element to be optimized for its specific function while avoiding the need for complex non-destructive readable imaging elements, thereby reducing manufacturing cost while maintaining expanded dynamic range capability
Solution Approach 2:
The patent changes the parameter of exposure time length by providing multiple imaging elements with different fixed exposure time lengths (e.g., first imaging element with exposure time T1, second imaging element with exposure time T2). This allows the system to capture image data across different exposure conditions simultaneously, expanding dynamic range without requiring a single expensive non-destructive readable imaging element
2Measurement precision
If non-destructive readable imaging elements are used to output multiple pixel data items at different exposure time lengths, then dynamic range is expanded, but device complexity increases
Solution Approach 1:
The device is segmented into multiple independent imaging elements, each with its own photoelectric conversion unit and signal processing unit. This segmentation simplifies the overall system architecture by avoiding the need for complex non-destructive readable imaging elements with dedicated drive circuits, reducing device complexity while achieving expanded dynamic range through multiple elements with different exposure time lengths
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 solution allows for expanded dynamic range in light amount detection with reduced manufacturing costs by utilizing two light receiving elements with different characteristics, effectively suppressing the decrease in detection accuracy and processing load.
Implementation Method 1
a first light receiving element that receives measurement light and outputs a first output value
Implementation Method 2
a second light receiving element that receives the measurement light and outputs a second output value
Data Source
AI summary
A measuring device includes a first light receiving element that receives measurement light and outputs a first output value, and a second light receiving element that receives the measurement light and outputs a second output value which is different from the first output value. A weighted composition is performed on the first output value and the second output value.