Laser Module Autofocus and Temperature Control for Precision Output
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Solution Overview
Problem
Conventional laser modules require mechanical adjustment of the focal length of the focusing lens, making them inconvenient to operate and difficult for users to adjust once shipped.
Innovation Solution
The laser module incorporates a voice coil motor and thermoelectric cooling module to electrically adjust the focal length of the focusing lens and maintain the laser unit's working temperature within ±1°C, allowing for convenient and precise adjustment of the focal length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical means are used to adjust the focal length of the focusing lens, then the structure is simple, but the ease of operation deteriorates and users cannot adjust the focal length conveniently after shipping
Solution Approach 1:
The patent replaces the traditional mechanical adjustment mechanism with a voice coil motor that uses electromagnetic fields to drive the focusing lens. This substitution eliminates the need for manual mechanical operation while enabling precise electric control of the focal length, directly resolving the contradiction between ease of operation and device complexity
Solution Approach 2:
The patent introduces an electric device with a voice coil motor that changes the position of the focusing lens by controlling electrical parameters. This allows the focal length to be adjusted dynamically through electrical signals rather than mechanical manipulation, improving operational convenience while maintaining manageable device complexity through integrated control
2Measurement precision
If the laser unit operates without temperature control, then the device complexity is low, but the measurement precision deteriorates due to temperature-induced errors
Solution Approach 1:
The patent implements a temperature control device with a thermistor that continuously monitors the temperature of the laser unit and provides feedback to the control system. This closed-loop feedback mechanism enables precise temperature compensation, ensuring measurement accuracy while managing device complexity through automated control
Solution Approach 2:
The patent uses a thermoelectric cooling module that actively adjusts the temperature of the laser unit by controlling electrical current through the thermoelectric element. This dynamic parameter control maintains optimal operating temperature, preventing measurement errors caused by thermal drift while integrating temperature control into the overall device architecture
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
Enables easy and precise adjustment of the focal length of the focusing lens by electric means, improving the operational convenience of the laser module and maintaining accurate temperature control to prevent measurement errors.
Implementation Method 1
The voice coil motor is configured to drive and move the focusing lens in a straight line toward or away from the laser unit with the focusing ring, so as to adjust a focal length of the focusing lens
Implementation Method 2
The temperature control device is mounted on the laser unit and includes a thermoelectric cooling module and a thermistor, and the thermistor is electrically connected to the thermoelectric cooling module. The thermistor is configured to detect a working temperature of the laser unit, and the thermoelectric cooling module is configured to cooperate with the thermistor to adjust the working temperature of the laser unit
Implementation Method 3
The thermistor is configured to detect a working temperature of the laser unit
Implementation Method 4
The focusing lens is configured to converge the laser light emitted from the laser unit so as to outwardly output the laser light
Data Source
AI summary
A laser module is provided and includes a laser unit, a focusing lens, an electric device, and a temperature control device. The laser unit is configured to emit a laser light. The focusing lens corresponds in position to the laser unit, and the focusing lens is configured to converge the laser light emitted from the laser unit so as to outwardly output the laser light. The electric device includes a focusing ring, a voice coil motor, and a motor base. The voice coil motor is configured to drive and move the focusing lens in a straight line toward or away from the laser unit with the focusing ring. The temperature control device is mounted on the laser unit and includes a thermoelectric cooling module and a thermistor. The thermoelectric cooling module is configured to cooperate with the thermistor to adjust a working temperature of the laser unit.