Movable Laser Converging Unit for Compact Multi-Wavelength Machining
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Solution Overview
Problem
Existing laser processing devices face challenges in maintaining device size while enabling movement of converging optical components, accommodating varying laser light wavelengths, accurately transferring laser light images, acquiring displacement data, and facilitating easy attachment and detachment of laser components.
Innovation Solution
The laser processing device includes a movable laser converging unit with a reflective spatial light modulator, converging optical system, and imaging optical system, allowing for integration and accurate image transfer while inhibiting device size increase. It also allows for detachable laser output units with adjustable output and polarization, and supports multiple wavelengths through interchangeable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If components on the converging optical system side are moved with respect to the object to be processed, then processing flexibility is improved, but device size increases
Solution Approach 1:
The device is divided into a stationary housing containing the laser oscillator and a movable laser converging unit containing the converging lens and spatial light modulator. This segmentation allows the converging components to move independently for processing flexibility while the main housing remains compact, resolving the contradiction between movement capability and device size.
Solution Approach 2:
The laser converging unit is designed to be movable with respect to the object to be processed, enabling dynamic adjustment of the converging lens position and spatial light modulator orientation. This dynamic capability provides processing flexibility while the unit itself remains a compact integrated module, preventing overall device size increase.
2Adaptability or versatility
If multiple laser light sources with different wavelengths are used, then processing versatility is improved, but device complexity increases
Solution Approach 1:
The device is designed to accommodate multiple laser light sources with different wavelengths by providing a universal mounting structure and optical path that can handle various wavelengths. The spatial light modulator and converging lens are selected to be wavelength-agile, allowing one device to perform multiple wavelength processing without requiring completely separate optical paths for each wavelength.
3Manufacturing precision
If the image of laser light on the reflective spatial light modulator is accurately transferred to the entrance pupil plane, then processing precision is improved, but device complexity increases
Solution Approach 1:
The spatial light modulator is integrated directly into the movable laser converging unit, merging the modulation function with the converging optical system. This integration ensures that the image of laser light on the reflective spatial light modulator is naturally and accurately transferred to the entrance pupil plane of the converging lens without requiring additional complex alignment mechanisms or separate imaging optical systems.
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 effectively moves optical components without increasing size, supports multiple wavelengths, accurately transfers laser light images, and enables easy attachment and detachment of laser components, enhancing processing flexibility and efficiency.
Implementation Method 1
a reflective spatial light modulator configured to reflect the laser light while modulating the laser light
Implementation Method 2
a converging optical system configured to converge the laser light at the object to be processed
Data Source
AI summary
A laser processing device includes: a device frame; a support unit attached to the device frame and configured to support an object to be processed; a laser output unit attached to the device frame; and a laser converging unit attached to the device frame so as to be movable with respect to the laser output unit. The laser output unit includes a laser light source configured to emit laser light, and the laser converging unit includes: a reflective spatial light modulator configured to reflect the laser light while modulating the laser light; a converging optical system configured to converge the laser light at the object to be processed; and an imaging optical system constituting a double telecentric optical system in which a reflective surface of the reflective spatial light modulator and an entrance pupil plane of the converging optical system are in an imaging relationship.