Shared Optical Path for Imaging and Quantum Key Distribution
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Solution Overview
Problem
Existing EO remote sensing payloads lack the capability to simultaneously achieve high-resolution imaging and quantum key distribution (QKD) operations, due to limitations in optical quality, structural stability, and environmental factors, especially when implemented on unstable platforms or in harsh conditions.
Innovation Solution
A combined electro-optical (EO) remote sensing payload architecture that integrates a high-resolution imaging sensor and QKD system using a shared light-refracting optical setup, with a beam-splitting optical setup and an alignment unit, allowing for simultaneous operation of both imaging and QKD functions by directing light through a unified optical path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared optical setup is used for both imaging and QKD, then device complexity is reduced, but imaging precision and QKD reliability deteriorate due to optical quality limitations and environmental factors
Solution Approach 1:
The optical system is segmented into distinct functional paths: a first optical path for imaging that includes imaging optics and an imaging sensor, and a second optical path for QKD that includes transmitting optics, receiving optics, and quantum signal detectors. This segmentation allows each path to be optimized for its specific function while sharing the common light-refracting optical setup, thereby reducing overall device complexity without compromising imaging precision or QKD reliability.
Solution Approach 2:
A beam splitter is introduced as an intermediary component that separates the light signal into different paths based on wavelength or direction. The beam splitter enables the imaging and QKD functions to operate simultaneously by directing appropriate portions of the light signal to各自的 detectors, resolving the contradiction between shared optical infrastructure and functional performance requirements.
2Device complexity
If a shared optical setup is used for both imaging and QKD, then device complexity is reduced, but QKD reliability deteriorates due to structural stability and environmental factors
Solution Approach 1:
The QKD function is segmented into a dedicated second optical path with separate transmitting and receiving optics, isolated from the imaging path. This segmentation protects the quantum signal transmission from environmental disturbances and structural instabilities affecting the imaging system, maintaining QKD reliability while still sharing the fundamental light-refracting optical setup.
Solution Approach 2:
The system incorporates dynamic adjustment mechanisms that allow the optical paths to adapt to environmental changes and platform movements. By enabling real-time adjustments in the shared optical setup, the system maintains stable quantum signal transmission despite external disturbances, resolving the contradiction between shared infrastructure and operational reliability.
3Measurement precision
If separate optical setups are used for imaging and QKD, then imaging precision and QKD reliability are maintained, but device complexity increases
Solution Approach 1:
The imaging and QKD systems are merged by sharing the light-refracting optical setup, which includes common optical components and structural support. This merging reduces device complexity and resource requirements while the segmented optical paths and dedicated detectors for each function ensure that imaging precision and QKD reliability are maintained through functional isolation.
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 integrated approach enhances the capabilities of remote sensing platforms by enabling simultaneous high-resolution imaging and secure QKD operations, leveraging the same optical design and environmental conditions, thereby increasing the usability of remote sensing platforms and supporting long-distance secure communication.
Implementation Method 1
a light-refracting optical setup
Implementation Method 2
the beam-splitting optical setup includes a tri-chroic prism assembly
Data Source
AI summary
An imaging and quantum cryptography apparatus comprising alight-refracting optical setup (101), a light-directing optical setup (102), an imaging sensor (103) capturing light refracted from the light-refracting optical setup and directed to the imaging sensor by the light-directing optical setup and at least one of a quantum key distribution (QKD) transmitter (104) generating a QKD light signal and transmitting the QKD light signal via the light-directing optical setup and through the light-refracting optical setup and a QKD receiver (105) acquiring and decoding light signals refracted from the light-refracting optical setup and directed to the QKD receiver by the light-directing optical setup. The imaging sensor, the at least one of QKD transmitter and QKD receiver, and the alignment unit, all use the same light-directing optical setup and the same light-refracting optical setup.