Switchable Imaging Optics for Wide View and High Resolution
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Solution Overview
Problem
Existing image sensors that cover a large field of view typically have poor resolution, while high-resolution sensors are not suitable for applications requiring a wide field of view, such as back-up cameras in vehicles.
Innovation Solution
An imaging system comprising multiple lenses and a light valve, such as a switchable reflective polarizer or reversible electroplated mirror, that allows a single image sensor to switch between different fields of view and focal distances by altering the polarization state of the light valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If an image sensor is designed to cover a large field of view, then the field of view is improved, but the resolution deteriorates
Solution Approach 1:
The patent employs a switchable light valve that can dynamically change its polarization state to alternate between different optical paths. This allows the system to switch between a wide field of view mode and a high resolution mode, making the characteristics dynamic rather than static. The light valve transitions between transmitting and reflecting states to select different lenses, enabling the system to adapt its field of view and resolution characteristics based on operational requirements.
Solution Approach 2:
The system uses periodic switching of the light valve between different polarization states to alternate between capturing wide field of view images and high resolution images. This periodic action allows the single image sensor to sequentially capture different types of images, which are then processed and combined to provide both wide area coverage and detailed resolution when needed.
2Measurement precision
If an image sensor is designed for high resolution, then the resolution is improved, but the field of view deteriorates
Solution Approach 1:
The switchable light valve enables the system to dynamically switch between optical configurations. When high resolution is required, the light valve reflects light from a specific lens onto the image sensor, providing detailed imaging. When wide field of view is needed, the light valve transmits light from a different lens, expanding the coverage area. This dynamic switching resolves the contradiction by allowing the system to have both characteristics at different times.
Solution Approach 2:
The patent creates a universal imaging system that can perform multiple functions using a single image sensor. By incorporating multiple lenses and a switchable light valve, the system can function as both a wide field of view camera and a high resolution camera, eliminating the need for separate specialized sensors for each function.
3Area of moving object
If multiple image sensors are used to achieve both wide field of view and high resolution, then the resolution and field of view are improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple optical paths and lens systems into a single imaging architecture. Instead of using separate image sensors for wide field of view and high resolution, the system combines multiple lenses and a switchable light valve to direct light from different lenses to a single image sensor, reducing overall system complexity while maintaining multiple functional capabilities.
Solution Approach 2:
The system achieves multi-functionality through a single universal image sensor that can capture both wide field of view and high resolution images by switching optical paths. This eliminates the need for multiple specialized sensors and their associated processing systems, thereby reducing device complexity while maintaining the ability to provide both wide coverage and detailed resolution when needed.
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 the capture of multiple images with different fields of view and focal lengths using a single image sensor, improving resolution and versatility without increasing system size, and allowing for applications like biometric identification and driver monitoring.
Implementation Method 1
The light valve may comprise a switchable reflective polarizer. The light valve may be configured to have a first polarization state and a second polarization state. The first polarization state may allow light to pass through the light valve and the second polarization state may reflect light that strikes the light valve.
Implementation Method 2
The light valve may comprise a reversible electroplated mirror.
Data Source
AI summary
An imaging system may comprise a first lens and a second lens; at least one light valve; and an image sensor in optical communication with the light valve. The first lens may be in optical communication with the light valve; and the second lens may be in optical communication with the light valve. The light valve may be configured to have a first polarization state and a second polarization state. The first polarization state may allow light to pass through the light valve and the second polarization state may reflect light that strikes the light valve.