Polarized Light Receiver Layout for Linear and Circular State Detection
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Solution Overview
Problem
Current light receiving devices with wire grid polarizers and quarter wavelength layers are limited in determining the polarized state and degree of polarization of light, particularly in distinguishing between linear and circularly polarized components, and extracting specific linearly polarized light.
Innovation Solution
A light receiving device comprising multiple photoelectric conversion element units, each with a quarter wavelength layer and wire grid polarizer, arranged in a specific orientation to capture and compare image data, allowing for the determination of polarized states and degree of polarization by analyzing light intensities across different polarized states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single photoelectric conversion element with wire grid polarizer and quarter wavelength layer is used, then the polarized state can be changed and detected, but the ability to easily determine degree of polarization and extract specific linearly polarized light is insufficient
Solution Approach 1:
The photoelectric conversion element is divided into multiple photoelectric conversion elements (at least three) with different wire grid polarizer transmission axes orientations. Each element detects a specific polarization component, and the controller processes these segmented measurements to determine the complete polarized state including degree of polarization and to extract specific linearly polarized light components.
Solution Approach 2:
The system achieves multiple functions using the same hardware components: it can determine the polarized state (circular or linear), calculate the degree of polarization, and extract specific linearly polarized light components. This is accomplished by processing signals from the multiple photoelectric conversion elements with different polarizer orientations through the controller.
2Adaptability or versatility
If multiple photoelectric conversion elements with different polarizer orientations are used, then the ability to determine polarized state and degree of polarization is improved, but the device complexity increases
Solution Approach 1:
Multiple photoelectric conversion elements with different wire grid polarizer orientations are combined into a single integrated device. The controller merges the signals from these elements to simultaneously determine the polarized state, calculate the degree of polarization, and extract specific linearly polarized light components, achieving enhanced functionality without proportionally increasing overall system complexity.
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 efficient detection and measurement of polarized states, including linear and circular polarization, and extraction of specific linearly polarized light components, improving the ability to analyze and differentiate between various polarized light components in the received light.
Implementation Method 1
each of the photoelectric conversion elements includes a quarter wavelength layer, a wire grid polarizer, and a photoelectric conversion section that are disposed in this order from a light entrance side
Implementation Method 2
the N photoelectric conversion elements disposed side by side along the first direction include the wire grid polarizers that have different polarization orientations
Implementation Method 3
a photoelectric conversion element with a wire grid polarizer and a quarter wavelength layer
Data Source
AI summary
A light receiving device according to an embodiment of the present disclosure includes a plurality of photoelectric conversion element units. Each of the photoelectric conversion element units includes a plurality of photoelectric conversion elements, the photoelectric conversion elements being M×N in total number, with M photoelectric conversion elements arranged in a first direction, and N photoelectric conversion elements arranged in a second direction. Each of the photoelectric conversion elements includes a quarter wavelength layer, a wire grid polarizer, and a photoelectric conversion section that are disposed in this order from a light entrance side. The M photoelectric conversion elements disposed side by side along the first direction include the quarter wavelength layers that have the same fast axis orientation. The N photoelectric conversion elements disposed side by side along the second direction include the quarter wavelength layers that have different fast axis orientations. The N photoelectric conversion elements disposed side by side along the second direction include the wire grid polarizers that have the same polarization orientation. The M photoelectric conversion elements disposed side by side along the first direction include the wire grid polarizers that have different polarization orientations.