Detection Device Dummy Lenses Lens Shape Uniformity
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Solution Overview
Problem
Variations in lens shapes due to manufacturing process conditions reduce detection accuracy in detection devices with stacked pinhole and lens arrays, affecting light condensation and sensor performance.
Innovation Solution
Incorporating dummy lenses in the peripheral region of the detection device, which are not overlapping with photodiodes, to reduce variations in lens shapes and improve detection accuracy by blocking light and maintaining consistent light condensation on photodiodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lenses are arranged in a lens array above the photosensor array, then light condensation on sensors is improved, but variations in lens shapes due to manufacturing process conditions reduce detection accuracy
Solution Approach 1:
The patent applies homogeneity by making the peripheral region have the same structural characteristics as the detection region. Dummy lenses are added in the peripheral region to create a uniform lens distribution across the entire array, ensuring that manufacturing process conditions affect all lenses uniformly rather than creating edge effects that would cause shape variations in detection region lenses.
Solution Approach 2:
The patent uses copying by creating dummy lenses that replicate the structure and optical properties of the functional lenses in the detection region. These dummy lenses are positioned in the peripheral region and serve as reference structures that experience the same manufacturing variations, thereby compensating for shape variations in the detection lenses through comparative measurement.
2Area of stationary object
If the detection region is enlarged to cover more area, then detection coverage is improved, but lens shape variations become more significant across the larger area
Solution Approach 1:
By extending the lens array into the peripheral region with dummy lenses, the patent creates a homogeneous structure where both detection and peripheral regions undergo similar manufacturing conditions. This allows for larger detection area coverage while maintaining consistent lens quality across the expanded region, as the peripheral lenses serve as reference points for calibration and compensation.
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 effectively reduces variations in light intensity and detection accuracy across the detection region, enhancing the overall performance of the detection device by minimizing the impact of manufacturing process variations on lens shapes.
Implementation Method 1
a plurality of photodiodes provided in the detection region
Implementation Method 2
a plurality of lenses provided so as to overlap the respective photodiodes
Data Source
AI summary
According to an aspect, a detection device includes: a substrate that has a detection region; a plurality of photodiodes provided in the detection region; a plurality of lenses provided so as to overlap the respective photodiodes; and a plurality of dummy lenses that are provided in a peripheral region between an outer perimeter of the detection region and edges of the substrate and are provided so as not to overlap the photodiodes.