Multi-Array Imaging System with Light-Blocking Layers
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Solution Overview
Problem
Current image sensor systems face challenges in achieving a wide angular field of view while maintaining high fidelity and reducing optical crosstalk among pixels, particularly in achieving simultaneous global electronic shuttering across multiple imaging arrays.
Innovation Solution
The implementation of an imaging system with multiple imaging array regions on a single substrate, where each array has a distinct, partially overlapping field of view, combined with global electronic shutter pixel circuits and optically sensitive nanocrystal material, allows for synchronized image capture and reduced crosstalk through light-blocking layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple imaging arrays are used to achieve wide field of view, then field of view is improved, but optical crosstalk among pixels increases
Solution Approach 1:
The imaging system is divided into multiple separate imaging arrays, each capturing a distinct portion of the wide field of view. This segmentation allows independent optimization of each array's optical path and reduces crosstalk by physically separating the imaging regions.
Solution Approach 2:
Light-blocking layers are introduced as intermediary elements between adjacent imaging arrays to prevent optical crosstalk. These layers act as mediators that block stray light from one array from interfering with adjacent arrays while maintaining the overall wide field of view capability.
2Device complexity
If multiple imaging arrays are integrated on a single substrate, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
Multiple imaging arrays are merged onto a single substrate, integrating what would otherwise be separate devices into one unified structure. This combining reduces overall system complexity while the substrate fabrication process ensures precise alignment through standard semiconductor manufacturing techniques.
Solution Approach 2:
The design utilizes parameter optimization in the layout and spacing of imaging arrays on the substrate to balance manufacturing precision requirements with integration benefits. By carefully controlling geometric parameters during design, the system achieves high integration without excessive manufacturing difficulty.
3Loss of time
If global electronic shuttering is implemented across multiple arrays, then image capture synchronization is improved, but circuit complexity increases
Solution Approach 1:
A universal control mechanism is implemented that provides global electronic shuttering functionality across all imaging arrays simultaneously. This multi-functional approach allows a single control signal to synchronize exposure timing across multiple arrays, reducing the need for separate control circuits for each array.
Solution Approach 2:
The global shutter control circuitry is designed to pre-synchronize the exposure timing of all imaging arrays before image capture begins. By establishing the shutter timing in advance across all arrays, the system achieves precise synchronization without requiring complex real-time coordination during capture.
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 enables high-resolution, wide-angle imaging with reduced optical crosstalk and efficient global electronic shuttering, enhancing image fidelity and processing capabilities.
Implementation Method 1
Image sensors transduce spatial and spatio-temporal information, carried in the optical domain, into a recorded impression. Digital image sensors provide such a recorded impression in the electronic domain.
Implementation Method 2
reduced crosstalk through light-blocking layers
Data Source
AI summary
In various example embodiments, an imaging system and method are provided. In an embodiment, the system comprises a first image sensor array, a first optical system to project a first image on the first image sensor array, the first optical system having a first zoom level. A second optical system is to project a second image on a second image sensor array, the second optical system having a second zoom level. The second image sensor array and the second optical system are pointed in the same direction as the first image sensor array and the first optical system. The second zoom level is greater than the first zoom level such that the second image projected onto the second image sensor array is a zoomed in on portion of the first image projected on the first image sensor array. The first image sensor array includes at least four megapixels and the second image sensor array includes one-half or less than the number of pixels in the first image sensor array.