Integrated Optical Correlator Planar Architecture
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Solution Overview
Problem
Conventional optical correlators are bulky, expensive, and have low compute power per unit volume, making them inefficient for high-resolution image processing, especially when compared to silicon-based solutions which become costly at higher resolutions.
Innovation Solution
The development of compact, integrated optical correlator architectures using wafer processing techniques, comprising a stack of planar layers with two spatial light modulators and a sensor, where optical power is provided by planar components like diffractive layers, enabling efficient processing of high-resolution images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional optical correlators are used, then image processing capability is provided, but device size is large and volume efficiency is low
Solution Approach 1:
The patent transitions from three-dimensional bulk optical components to two-dimensional planar integrated layers. Multiple optical functions (spatial light modulation, focusing, Fourier transformation) are achieved within a planar stack configuration, dramatically reducing the device footprint while maintaining computational capability. The planar integration allows high-resolution image processing in a compact form factor suitable for high-volume production.
2Ease of manufacture
If conventional optical correlators are used, then optical correlation function is provided, but manufacturing cost is high
Solution Approach 1:
The patent merges multiple discrete optical components (spatial light modulators, lenses, mirrors) into a single integrated planar stack structure. This consolidation eliminates the need for complex hand-assembly and precise alignment procedures, enabling cost-effective manufacturing through standard semiconductor fabrication processes while improving device reliability.
3Manufacturing precision
If silicon-based processing is used for high resolution, then processing cost increases, but optical correlator scaling is more favorable
Solution Approach 1:
The patent employs spatial light modulators that can be programmed to perform multiple optical functions (image encoding, filtering, Fourier transformation) without requiring additional hardware components. This multi-functionality allows high-resolution image processing capabilities to be achieved through software control rather than expensive hardware scaling, making the system adaptable to different resolution requirements.
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 solution allows for efficient processing of high-resolution images in a compact, cost-effective manner, surpassing the limitations of conventional optical correlators by providing a robust and scalable form factor suitable for high-volume production.
Implementation Method 1
Optical power is provided by planar components, such as diffractive layers configured to focus incident light
Implementation Method 2
a first focusing layer arranged to receive the selectively-attenuated light from the first spatial light modulator and configured to focus the selectively-attenuated light
Implementation Method 3
Optical power is provided by planar components, such as diffractive layers configured to focus incident light
Implementation Method 4
a second focusing layer arranged to receive light from the second spatial light modulator and configured to focus the twice-attenuated light
Implementation Method 5
a sensor array arranged to receive light from the second focusing layer and configured to detect spatial intensity variations of the focused, twice-attenuated light
Data Source
AI summary
An optical correlator includes a first spatial light modulator arranged to receive light from a light source and configured to selectively attenuate the light; a first focusing layer arranged to receive the selectively-attenuated light from the first spatial light modulator and configured to focus the selectively-attenuated light; a first spacer layer substantially transparent to the light from the light source, the first focusing layer being disposed on the first spacer layer; a second spatial light modulator arranged in a Fourier optical relationship with respect to the first spatial light modulator and configured to selectively attenuate the focused light from the first focusing layer to provide twice-attenuated light, the second spatial light modulator being disposed on the first spacer layer opposite the first focusing layer; a second spacer layer substantially transparent to the light from the light source, the second spatial light modulator being disposed on the second spacer layer and positioned between the first and second spacer layers; a second focusing layer disposed on the second spacer layer opposite the second spatial light modulator and arranged to receive light from the second spatial light modulator and configured to focus the twice-attenuated light to provide focused, twice-attenuated; and a sensor array arranged to receive light from the second focusing layer and configured to detect spatial intensity variations of the focused, twice-attenuated light.