Multi-Beam Laser Engraving With Dynamic Focus for Assembled Glazing
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Solution Overview
Problem
Current laser treatment solutions for conductive coatings on glazing units can only be applied to flat, non-assembled units, making it impossible to retrofit existing energy-saving windows for improved electromagnetic wave penetration, and repeater-based systems are energy-intensive and require frequent updates.
Innovation Solution
A high-speed laser engraving device with multiple beams and optical sensors that can process assembled glazing units of any shape, reducing attenuation for EM waves by creating a patterned coating with low thermal emissivity, allowing for real-time focal adjustment and rapid processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laser treatment is applied to conductive coatings on glazing units, then electromagnetic wave penetration is improved, but the treatment can only be applied to flat non-assembled units at the production site
Solution Approach 1:
The patent employs dynamic focusing mechanisms that allow the laser system to adapt to varying distances and angles of assembled glazing units. The focusing position is continuously adjusted during the engraving process to maintain optimal focus on the coating surface regardless of the unit's assembly configuration, enabling treatment of both flat and curved surfaces.
Solution Approach 2:
The patent introduces an optical sensor as an intermediary between the laser source and the coating surface. This sensor detects the distance to the coating and provides feedback for real-time focusing adjustment, enabling the system to accommodate assembled units with various geometries and orientations that would be inaccessible to conventional fixed-focus laser systems.
2Productivity
If multiple laser beams are used for engraving, then processing speed is improved, but focusing position control becomes more complex
Solution Approach 1:
The patent combines multiple laser beams into a single optical path that shares common focusing optics and control mechanisms. By merging the focusing control for multiple beams through a unified system rather than independent controls for each beam, the patent achieves high-speed multi-beam processing while avoiding the exponential complexity that would result from individual focusing systems for each beam.
Solution Approach 2:
The patent implements a feedback control system where optical sensors detect the actual focusing position and provide real-time information to adjust the focusing elements. This feedback mechanism ensures that all multiple laser beams maintain precise focus on the coating surface simultaneously, even during high-speed processing or when treating uneven surfaces, thereby managing the complexity through intelligent control.
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 device enables efficient reduction of EM wave attenuation in assembled glazing units, maintaining energy-saving capabilities while improving MIMO efficiency and reducing the need for frequent system updates.
Implementation Method 1
an optical sensor arranged to measure a distance between the optical sensor and the target surface by detecting a position of a reflected light
Implementation Method 2
A laser source is configured to produce a laser beam directed to a beam splitter, which is used to split the laser beam into a plurality of divided processing beams directed to a target surface
Data Source
AI summary
The present invention concerns a laser engraving device for engraving a target surface. The laser engraving device comprises: a beam splitter for dividing a processing laser beam into a plurality of engraving laser beams; a first optical focusing element with an adjustable focal point for focusing the plurality of engraving laser beams onto the target surface; and an optical sensor configured to determine the distance between the target surface and the optical sensor. The first optical focusing element is connected to the optical sensor by a data link to receive the determined distance from the optical sensor. Furthermore, the first optical focusing element is configured to adjust its focal point based on the determined distance received from the optical sensor.