Composite Laser Pulse Switching for Variable-Width Skin Treatment
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Solution Overview
Problem
Conventional skin treatment devices struggle to simultaneously generate multiple laser pulses of varying time widths, such as several ns to tens of ns and several µs to hundreds of µs, due to mechanical operation of waveplates, limiting the ability to achieve diverse skin treatment effects like tattoo removal and wrinkle rejuvenation.
Innovation Solution
A skin treatment device using a multiple composite laser pulse system with electrical switches to control laser pulse generation, allowing for simultaneous production of laser pulses of different widths by converting polarization components, facilitated by a laser generating unit with energy, light emitting, and polarizing components, and controlled by a control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a motor is used to drive a waveplate in/out of a resonator to generate laser pulses of various time widths, then various skin treatment effects can be achieved, but the mechanical operation slows the speed of driving in/out of the resonator, preventing repeated generation of pulses of various time widths over a short period of time
Solution Approach 1:
The patent replaces the mechanical motor-driven waveplate system with an electrical switching system. Two Q-switch drivers (first and second) control two electrical switches (first and second) that directly control the polarization state of light in the resonator, eliminating mechanical movement and enabling rapid switching between different pulse width modes without the speed limitations of motor operation.
Solution Approach 2:
The patent changes the control parameter from mechanical position (waveplate insertion depth) to electrical switching states (Q-switch on/off timing). By controlling the timing and duration of electrical signals to the Q-switches, the system can rapidly generate laser pulses of different time widths (nanosecond to microsecond range) by adjusting the pulse generation timing of the Q-switch drivers, achieving both versatility and high speed.
2Adaptability or versatility
If a motor-driven waveplate system is used to generate multiple laser pulses of different time widths, then diverse skin treatment effects can be obtained, but the mechanical operation prevents simultaneous or rapid repeated generation of pulses
Solution Approach 1:
The patent eliminates the time-consuming mechanical waveplate movement by using electrical Q-switch control. The first and second Q-switch drivers can independently and simultaneously control their respective switches, allowing the resonator to rapidly generate multiple laser pulses of different time widths without mechanical delays, significantly reducing the time interval between pulses.
Solution Approach 2:
The system prepares multiple Q-switch control signals in advance with different timing configurations. The first Q-switch driver can generate a first laser pulse with a first time width, and the second Q-switch driver can generate a second laser pulse with a second time width, by pre-configuring the pulse generation timing of each driver, enabling rapid sequential or simultaneous pulse generation without mechanical repositioning time.
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 can efficiently generate multiple laser pulses of varying time widths, enabling simultaneous skin treatment effects like tattoo removal and wrinkle rejuvenation, with reduced time intervals between pulses.
Implementation Method 1
a polarizing portion disposed on an optical resonant path between the first mirror and the second mirror and configured to polarize the light
Implementation Method 2
a first switch and a second switch configured to convert a polarization component of an incident polarized light
Implementation Method 3
A laser is an acronym of light amplification by stimulated emission of radiation and refers to light amplified by stimulated emission of radiation or a device emitting the light
Data Source
Figure 1~2
Figure 3~4
Figure 5(a)~5(d)
AI summary
A skin treatment device using multiple composite laser pulses according to an embodiment of the present invention comprises: a laser generation unit including an energy unit for supplying energy, a light emission unit that generates light by absorbing the energy supplied from the energy unit, a first mirror and a second mirror that form a resonance path in which the light generated from the light emission unit is amplified, a polarization unit that is disposed on an optical resonant path between the first mirror and the second mirror and polarizes the light, and a first switch and a second switch that transform polarization components of the incident polarized light; and a control unit that controls the first switch and the second switch so that the laser generation unit operates in a single laser pulse mode or a multiple laser pulse mode.