Laser Scanner Reflector with Horn Mirror for Interference Reduction
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Solution Overview
Problem
High-frequency electromagnetic waves, such as 5G communication waves, cause operation errors in laser scanners by interfering with their ability to detect target objects accurately.
Innovation Solution
A laser scanner design incorporating a reflector with a lens and a horn-shaped mirror, where the lens has a cylindrical shape with a convex cross-section and a partially coated surface impervious to laser transmission, and a photodetector with a p-type and n-type semiconductor junction, reduces interference by directing and focusing the laser beams effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional laser scanner uses a simple reflector without specialized lens and horn-shaped mirror, then the device complexity is low, but the reliability deteriorates due to operation errors caused by high-frequency electromagnetic wave interference
Solution Approach 1:
The patent introduces a specialized reflector comprising a lens and horn-shaped mirror as an intermediary component between the laser transmitter and target object. This mediator focuses the laser beam into a tighter pattern and directs it toward the target, while simultaneously blocking high-frequency electromagnetic waves from reaching the photodetector, thereby resolving the contradiction between detection accuracy and structural complexity
Solution Approach 2:
The reflector employs a composite structure combining a lens material with horn-shaped mirror geometry. This composite design integrates both focusing functionality and electromagnetic wave shielding capabilities into a single component system, achieving improved reliability without proportionally increasing device complexity
2Measurement precision
If the laser beam is transmitted without focusing, then the device complexity is low, but the measurement precision deteriorates due to scattered laser reflection
Solution Approach 1:
The patent employs a lens with curved surfaces to focus the laser beam. The curved geometry of the lens concentrates the divergent laser rays into a tighter, more directed beam pattern, improving the precision of distance measurement by ensuring that reflected light returns more consistently to the photodetector
Solution Approach 2:
The focusing function is merged into the reflector assembly itself rather than being a separate mechanism. The lens is integrated with the horn-shaped mirror structure, combining beam focusing and electromagnetic wave shielding functions into a unified component that improves measurement precision without adding separate focusing mechanisms
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 solution effectively minimizes interference from high-frequency electromagnetic waves, enhancing the accuracy of target object detection by the laser scanner.
Implementation Method 1
a reflector including a lens and a horn-shaped mirror configured to reflect the first laser and to irradiate the first laser to the target object
Implementation Method 2
a reflector including a lens and a horn-shaped mirror configured to reflect the first laser and to irradiate the first laser to the target object and to reflect the second laser to the receiver
Implementation Method 3
The receiver may include a photodetector. The photodetector may include a p-type semiconductor and an n-type semiconductor. The receiver may be configured to detect the target object using a built-in potential barrier formed at a p-n junction between the p-type semiconductor and the n-type semiconductor.
Data Source
AI summary
A method and a device for detecting an object using a laser are provided. A laser scanner for detecting an object using a laser includes a transmitter configured to transmit a first laser, a receiver configured to receive a second laser reflected by the target object, and a reflector including a lens configured to reflect the first laser and to irradiate the first laser to the target object and to reflect the second laser to the receiver, and a mirror having a shape of a horn.