Laser Shaping Prisms for Adjustable Line Length
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Solution Overview
Problem
Existing devices for shaping laser radiation to produce a linear intensity distribution are limited in adjusting the line length and field size in a working plane, as the lengths of the line-shaped intensity distribution are fixed after production, and the use of movable substrates can impair optical effectiveness and homogeneity.
Innovation Solution
Incorporating two prisms between the second homogenizer and the lens device, which can adjust the cross-section and divergence of the laser radiation, allowing for flexible adjustment of the line length and field size by changing the divergence factor between 0.5 and 2.0, and enabling the lenses to be arranged in a way that enhances homogenization and reduces manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two substrates are moved relative to one another to adjust line length, then the line length can be adjusted, but the optical effectiveness and homogeneity of the intensity distribution are impaired
Solution Approach 1:
A telescope arrangement comprising a first telescope lens and a second telescope lens is introduced as an intermediary optical system between the second homogenizer and the lens device. This intermediary system enables line length adjustment through varying the distance between the telescope lenses, while maintaining optical effectiveness and homogeneity by properly imaging the laser radiation onto the lens device.
Solution Approach 2:
The adjustment mechanism is segmented into two independent parts: the fixed second homogenizer substrate and the movable telescope arrangement. This segmentation allows the telescope lenses to be moved relative to each other for adjustment without moving the homogenizer substrates, thereby preserving optical effectiveness while achieving line length variability.
2Manufacturing precision
If the line length and field size are fixed after production, then manufacturing precision is improved, but adaptability for different working conditions is reduced
Solution Approach 1:
The system transitions from a static configuration with fixed line length to a dynamic configuration where the telescope lenses can be moved relative to each other. This dynamic adjustment capability allows the line length to be varied after production while maintaining manufacturing precision through proper optical design and imaging relationships.
3Adaptability or versatility
If prisms are used to adjust cross-section and divergence, then adaptability of line length is improved, but device complexity increases
Solution Approach 1:
The telescope arrangement serves multiple functions simultaneously: it adjusts the line length, controls the divergence of the laser radiation, and maintains proper imaging onto the lens device. This multi-functionality reduces the need for separate adjustment mechanisms, thereby limiting the increase in device complexity despite the added adaptability.
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 prisms effectively influence the shape of the intensity distribution, allowing for easy adjustment of the line length and field size in the working plane without compromising optical effectiveness or homogeneity, while reducing manufacturing costs by using identical prism designs and optimizing lens arrangements.
Implementation Method 1
the prisms are set up to at least partially reduce or increase the cross section and/or the divergence of the laser radiation passing through them
Data Source
AI summary
Device for shaping a laser radiation, comprising a first homogenizer with a first array of lenses and a second homogenizer with a second array of lenses through which the laser radiation passes through one after the other, a lens device which superimposes the laser radiation passed through the second array of lenses in a working plane, and a first prism and a second prism arranged between the second homogenizer and the lens device, wherein the laser radiation passed through the second array of lenses successively passes through the first and the second prism passes before impinging on the lens means.