Rotating Reflector Scanning for Laser Energy Density
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Solution Overview
Problem
Existing medical cosmetology devices using high-power lasers for hair removal require higher power levels, leading to increased costs and potentially lower energy density.
Innovation Solution
A light spot scanning device that includes a laser, a collimating lens, and a reflector connected to a driving member, which rotates to overlap multiple linear light spots, increasing energy density without increasing laser power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-power laser is used to concentrate hair removal energy, then hair removal effect is achieved, but cost increases and energy density decreases
Solution Approach 1:
The patent applies the dynamics principle by using a rotating reflector to dynamically scan and overlap multiple linear light spots on the treatment area. This dynamic scanning mechanism allows the same laser power to deliver higher effective energy density through repeated passes and overlapping spots, eliminating the need to increase laser power while achieving better hair removal results.
Solution Approach 2:
The patent implements periodic action through the rotating reflector that periodically scans across the treatment area, creating a series of overlapping linear light spots. This periodic scanning pattern allows energy to be concentrated through repeated exposure of the same area, effectively increasing energy density without requiring higher instantaneous laser power.
2Power
If high-power laser is used to concentrate hair removal energy, then hair removal effect is achieved, but device cost increases
Solution Approach 1:
The patent uses a rotating reflector mechanism that can be manufactured at lower cost compared to high-power laser systems. The reflector, driven by a motor, creates the scanning effect that concentrates energy, providing a cost-effective alternative to using significantly more powerful and expensive laser equipment.
Solution Approach 2:
The rotating reflector acts as an intermediary mechanism that takes the laser beam and redistributes it across the treatment area through scanning and overlapping. This intermediary component enables energy concentration without requiring the laser source itself to be more powerful or expensive.
3Use of energy by moving object
If reflector rotates to overlap linear light spots, then energy density increases, but device structure becomes more complex
Solution Approach 1:
The patent employs a rotating reflector that adds dynamic movement to an otherwise static optical system. This single rotational component enables the overlapping of linear light spots to increase energy density, achieving the desired functional improvement through a relatively simple mechanical addition rather than a complex multi-component system.
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 achieves higher energy density through overlapping linear light spots, improving hair removal efficiency while maintaining a low-cost and compact design.
Implementation Method 1
the laser beam emitted by the laser forms a linear light spot through the collimating lens
Implementation Method 2
the reflector is driven to continuously rotate according to a preset path by the driving member, and a plurality of the linear light spots formed by the continuous rotation overlap sequentially on the light exiting side of the reflector
Data Source
AI summary
The invention provides a light spot scanning device, a scanning method thereof, and a medical cosmetology device, belonging to the technical field of medical cosmetology, comprising a laser and a collimating lens and a reflector arranged in sequence along the optical path transmission direction of the laser. The reflector is also connected with a driving member, the laser beam emitted by the laser forms a linear light spot through the collimating lens, and the reflector is driven to continuously rotate according to a preset path through the driving member. A plurality of linear light spots formed by the continuous rotation are sequentially overlapped on the light exiting side of the reflector to form a scanning linear light spot. Each time the reflector rotates, a group of linear light spots is formed. After continuous rotation, multiple groups of sequentially overlapping linear light spots are formed on the light exiting side of the reflector, called scanning linear light spots. The adjacent linear light spots have overlapping regions, and the energy density of the overlapping regions is higher than the energy density of the original light spot, which solves the problem of low energy density in the prior art. Moreover, the rotation of the reflector is used to superimpose the light spots without increasing the power of the laser, so that the light spot scanning device has a small structural size, low cost and high reliability.