Laser Beam Shaping for Uniform Ellipticity Before Beam Combining
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Solution Overview
Problem
Existing light-emitting devices that combine laser light beams often suffer from reduced light intensity and worsened resolution due to the differences in ellipticities of the beam cross-sections of individual laser light beams, which are not adequately addressed before combining.
Innovation Solution
The proposed solution involves a light-emitting device with a beamforming device that adapts the ellipticities of the beam cross-sections of laser light beams to be more uniform before combining them, using elements such as cylinder lenses, prism telescopes, and wavelength-selective mirrors to achieve this.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If laser light beams with different ellipticities are combined directly, then the combining process is simple, but the light intensity is reduced and resolution is worsened
Solution Approach 1:
The patent applies preliminary action by adapting the ellipticities of laser light beams to one another before combining them. The beamforming device modifies the beam parameters in advance, ensuring that beams with different ellipticities are normalized prior to combination, thereby preventing intensity loss and resolution degradation while maintaining a relatively simple overall system structure
2Illumination intensity
If beam ellipticities are adapted before combining, then light intensity and resolution are maintained, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the ellipticity parameter of laser light beams through the beamforming device. By adjusting beam parameters (such as using cylindrical lenses or anamorphic prism pairs) to normalize ellipticities before combination, the system maintains high light intensity and resolution while adding only the necessary optical elements for parameter adaptation
3Device complexity
If beam ellipticities are not adapted, then the system design is compact and simple, but the resolution and light intensity deteriorate
Solution Approach 1:
The patent applies preliminary action by adapting the ellipticities of laser light beams to one another before combining them. The beamforming device modifies the beam parameters in advance, ensuring that beams with different ellipticities are normalized prior to combination, thereby preventing intensity loss and resolution degradation while maintaining a relatively simple overall system structure
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
This approach ensures that the combined light beam has a reduced ellipticity, maintaining high light intensity and resolution, and allows for optional further correction to achieve a circular beam cross-section.
Implementation Method 1
using elements such as cylinder lenses, prism telescopes, and wavelength-selective mirrors to achieve this
Implementation Method 2
a beam-combining device that, after the adapting of the ellipticities of the beam cross-sections by the beamforming device, combines the laser light beams to form an overall light beam
Data Source
AI summary
A light-emitting device, having a laser light device that is designed to emit a multiplicity of laser light beams. Ellipticities of beam cross-sections of the laser light beams differ at least partly from one another. The light-emitting device includes a beamforming device that is introduced into the beam path of at least one of the laser light beams and that is designed to adapt the ellipticities of the beam cross-sections of the laser light beams to one another, and a beam-combining device that is designed to combine the laser light beams to form an overall light beam, after the adapting of the ellipticities of the beam cross-sections by the beamforming device.