Light Detector Lens Layout for Centered Optical Path Concentration
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Solution Overview
Problem
Current light detectors face challenges in enhancing their performance, particularly in concentrating the optical path of incident light effectively to improve light detection efficiency and sensitivity.
Innovation Solution
The design incorporates a light detector with a refracting layer and lenses arranged in a specific configuration, where the refracting layer's thickness is optimized relative to the period of the elements, allowing for efficient light concentration at the element center, thereby enhancing light detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the refracting layer thickness is increased to concentrate optical path, then light detection efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by optimizing the refracting layer thickness to a specific range (0.05λ to 0.2λ, where λ is the incident light wavelength) to achieve optimal light concentration. This quantitative parameter specification resolves the contradiction by providing a precise thickness value that maximizes detection efficiency while avoiding excessive complexity from overly thick layers.
Solution Approach 2:
The patent employs dynamics by making the refracting layer thickness可调 (adjustable) or optimized for different wavelength ranges. The lens focal lengths and refracting layer thickness can be dynamically adjusted or designed for specific application requirements, allowing the system to adapt to different detection needs while maintaining optimal performance.
2Measurement precision
If lenses are added to concentrate light, then detection sensitivity is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by positioning lenses only at specific locations where light concentration is most beneficial, rather than uniformly across the entire detector surface. The lens arrangement focuses optical energy precisely at the photodetector active regions, enhancing detection sensitivity locally while minimizing overall device complexity.
Solution Approach 2:
The patent uses partial action by implementing lenses only in regions where they provide the most significant performance benefit. Rather than covering the entire detector area with lenses, the design selectively applies lens elements to optimize light concentration at critical detection zones, balancing sensitivity improvement with complexity reduction.
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
This configuration improves the light detection efficiency by ensuring that the optical path is concentrated at the element center, increasing the detection probability and sensitivity of the light detector.
Implementation Method 1
A refracting layer is located between the plurality of elements and the plurality of lenses. The refracting layer has a first thickness. A ratio of the first thickness to the first period is not less than 0.16 and not more than 0.72.
Data Source
AI summary
According to one embodiment, a light detector includes a plurality of elements. Each of the elements includes a first semiconductor region, a second semiconductor region, and a third semiconductor region. The second semiconductor region is located on the first semiconductor region and has a higher first-conductivity-type impurity concentration than the first semiconductor region. The third semiconductor region is located on the second semiconductor region. The elements are arranged at a first period in a second direction crossing a first direction. The first direction is from the first semiconductor region toward the second semiconductor region. A quenching part is electrically connected with the third semiconductor region. Multiple lenses are located respectively on the elements. One of the lenses is positioned on one of the elements. A refracting layer is located between the elements and the lenses. The refracting layer has a first thickness.