Vibration Mirror Laser Gating for Stable Pulse Processing
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Solution Overview
Problem
Current laser pulse products face challenges in emission control, particularly in providing sufficient pulse energy immediately after activation, which affects the stability and reliability of manufacturing processes.
Innovation Solution
A laser processing apparatus that includes a laser unit, a vibration mirror module, a focusing module, a mask, and a processing platform, where the vibration mirror module selectively reflects the laser pulse beam into different beams based on its mode, allowing only the beam with stable energy to be focused and applied to the processing platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electro-optical modulator is used to control laser pulse emission, then emission stability is improved, but device cost and complexity increase significantly
Solution Approach 1:
The patent extracts and removes the electro-optical modulator from the laser system, replacing it with a simpler mechanical shutter or gate mechanism that achieves the same emission control function without the complexity and cost of electro-optical modulation components
Solution Approach 2:
The patent employs a cost-effective mechanical shutter or gate mechanism instead of expensive electro-optical modulators, using a simpler, more economical component that can be easily replaced if needed, thereby reducing overall device cost and complexity while maintaining emission stability
2Object-affected harmful factors
If the light gate is switched off before pulse laser reaches stable state, then harmful emissions are blocked, but manufacturing process efficiency decreases due to delayed processing
Solution Approach 1:
The patent implements a preliminary action by pre-positioning the mechanical shutter or gate in an open state before the laser pulse reaches stable power, allowing the beam to pass through without blockage. The shutter then closes at the precise moment when stable power is achieved, blocking harmful emissions. This preliminary positioning enables both harmful emission blocking and maintained processing efficiency
Solution Approach 2:
The patent allows the laser pulse to skip through the mechanical shutter during the unstable initial phase when the shutter is open, rushing through the transient period without interference. Once stable power is reached, the shutter closes to block harmful emissions. This skipping approach ensures efficient processing during the necessary warm-up period while still protecting against harmful emissions
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 enhances the stability and variety of manufacturing processes by ensuring that only the beam with stable energy is used, thereby improving the reliability of the processing outcomes and reducing costs by avoiding the use of costly electro-optical modulators.
Implementation Method 1
the vibration mirror module is positioned on a path of the laser pulse beam, configured to reflect the laser pulse beam and has a first mode and a second mode configured to selectively reflect the laser pulse beam into a first beam while being in the first mode or to selectively reflect the laser pulse beam into a second beam while being in the second mode
Implementation Method 2
The focusing module receives the second beam reflected by the vibration mirror module in the second mode and focuses the second beam onto a focus
Data Source
AI summary
A laser processing apparatus provides a laser unit, a vibration mirror module, a focusing module, and a processing platform. The laser unit emits a laser pulse beam. The vibration mirror module, positioned on the path of the laser pulse beam, reflects the laser pulse beam and has a first mode and a second mode configured to reflect the laser pulse beam into a first beam while the module is in the first mode or alternatively, into a second beam while the module is in the second mode. The first beam and the second beam travel in different directions. The focusing module receives the second beam reflected by the vibration mirror module in the second mode and focuses the second beam onto a focus. The processing platform is positioned at the focus to bear a to-be-processed device, upon which the second beam is cast.