Holographic Camouflage System Using Diffractive Optical Elements
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Solution Overview
Problem
Current camouflage systems are ineffective in the optical atmospheric window, as they struggle to manipulate electromagnetic waves in the visible spectrum to achieve undetectability.
Innovation Solution
The development of a holographic camouflage system using reflection holographic optical elements (RHOEs) that diffract the visible spectrum, allowing for dynamic and adaptive camouflage by mimicking the surrounding environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional camouflage systems are used, then they provide static concealment, but they are ineffective in the optical atmospheric window and cannot dynamically adapt to the environment
Solution Approach 1:
The patent applies dynamics by using a camera to capture real-time environmental images and an image generator to project these images onto the camouflage surface, transforming static camouflage into a dynamic system that continuously adapts to environmental changes, thereby resolving the contradiction between static concealment and environmental adaptability
Solution Approach 2:
The patent uses copying by capturing environmental images with a camera and projecting these copied images onto the camouflage surface through an image generator, allowing the camouflage system to replicate the surrounding environment dynamically, thus achieving both adaptability and concealment effectiveness
2Adaptability or versatility
If active camouflage systems with power supply are used, then dynamic camouflage is achieved, but device complexity and power requirements increase
Solution Approach 1:
The patent applies universality by integrating multiple functions into a single camouflage structure: the surface serves both as the camouflage display medium and as part of the optical path for the image generator, reducing the need for separate components and thereby decreasing system complexity while maintaining dynamic camouflage capability
Solution Approach 2:
The patent merges the camera, image generator, and camouflage surface into an integrated system where the camouflage surface simultaneously serves as the projection medium and optical element, combining multiple functional components into a unified structure that reduces overall system complexity
3Reliability
If holographic optical elements are used, then passive optical camouflage is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies segmentation by dividing the camouflage surface into multiple discrete holographic optical elements arranged in an array, where each element can be manufactured and tested independently, allowing for modular production that reduces the precision requirements for each individual element while maintaining overall system performance
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
The system provides a passive and dynamic optical camouflage, effectively delaying the location and identification of objects or personnel by diffusing the surrounding environment, thus remaining undetectable in the visible spectrum.
Implementation Method 1
holographic optical elements (HOE) which diffract the visible spectrum
Implementation Method 2
reflection holographic optical elements (RHOEs)
Data Source
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AI summary
A holographic cloaking or concealment system and method having a meshed structure formed by one or more holographic optical elements configurable according to at least one of the following parameters: (a) the wavelength (λ) or color to be diffracted; (b) the bandwidth (Δλ) or amount of that color to be diffracted; (c) the diffraction efficiency (η) or percentage to be diffracted with respect to the incident light; and (d) the diffraction direction (α); in such a way that said holographic optical elements form one or more diffractive reflection blocks, whose optical properties are selected according to the optical effect required by a predetermined camouflage or concealment pattern in the visible spectrum and/or in the near infrared and/or in the ultraviolet.