Quantum-Classical Light Emitter for Distance Measurement
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Solution Overview
Problem
Current distance measurement systems, such as LiDAR, face limitations in measurement range and robustness against external light, particularly when using pulsed light and quantum entangled photons for distance calculation.
Innovation Solution
A light projecting-and-receiving apparatus that emits a photon pair in a quantum entangled state and classical light, with a light receiver capable of receiving and processing both reflections to enhance measurement range and robustness against external light, utilizing quantum correlation information and classical light for distance calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If pulsed light is used for distance measurement, then measurement speed is improved, but measurement range is limited
Solution Approach 1:
The patent combines quantum entangled photon pairs with classical light in a single transmitting unit, allowing the system to utilize both quantum correlation information for robustness and classical light for extended measurement range. The receiving unit processes both reflection types simultaneously, resolving the contradiction between measurement speed and range.
Solution Approach 2:
The patent employs a composite light source that transmits both quantum entangled photons and classical light together. This composite approach allows the system to achieve both high measurement speed through quantum correlation detection and extended range through classical light reflection, overcoming the limitations of using pulsed light alone.
2Reliability
If quantum entangled photons are used for distance measurement, then robustness against external light is improved, but measurement range is limited
Solution Approach 1:
The patent merges quantum entangled photon detection with classical light detection in a unified receiving system. The quantum correlation information provides robustness against external light interference, while the classical light component extends the measurement range, allowing both benefits to coexist.
Solution Approach 2:
The receiving unit is designed with multi-functionality to handle both quantum entangled photon reflections and classical light reflections. This universal design enables the system to maintain robustness through quantum correlation while achieving extended range through classical light processing.
3Reliability
If only quantum entangled photons are transmitted, then robustness against external light is improved, but available light energy is reduced
Solution Approach 1:
The patent combines quantum entangled photon transmission with classical light transmission in a single optical path. This merging allows the system to maintain robustness through quantum correlation detection while replenishing available light energy through the classical light component, addressing the energy limitation.
Solution Approach 2:
The transmitting unit employs a composite light source that simultaneously generates and transmits both quantum entangled photon pairs and classical light. This composite approach ensures that the system maintains robustness against external light interference while sufficient light energy is available for extended measurement range.
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 achieves a wider measurement range and improved robustness against external light interference by using quantum entangled photons and classical light, allowing for accurate distance measurement even in challenging light conditions.
Implementation Method 1
a first light emitter to emit first light, and second light in a quantum entangled state with the first light
Implementation Method 2
a light receiver to receive a first reflection light and a second reflection light
Data Source
AI summary
A light projecting-and-receiving apparatus includes a first light emitter to emit first light, and second light in a quantum entangled state with the first light, a second light emitter to emitter third light of classical light, and a light receiver to receive a first reflection light and a second reflection light. The first reflection light is a reflection of at least one of the first light or the second light from an object, and the second reflection light is a reflection of the third light from the object.