Coaxial Laser Light Source Apparatus Optical Path Alignment
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Solution Overview
Problem
Current laser light projection systems with multiple sources integrated in a single module often result in non-uniform intensity and color due to non-coaxial optical axes, leading to color blocks on the display screen.
Innovation Solution
A coaxial laser light source apparatus comprising multiple laser light sources arranged perpendicularly, with optical path adjusting elements such as reflective lenses, beam splitters, and polarizing elements to align and homogenize laser lights of different wavelengths and polarization states, ensuring they enter the beam homogenizer coaxially and symmetrically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple laser light sources are integrated in a single module, then the volume of the system is reduced, but the optical axes of the color lights become non-coaxial resulting in non-uniform intensity and color
Solution Approach 1:
The patent introduces optical path adjusting elements (lenses, mirrors, beam splitters) as intermediary components between the laser light sources and the projection optical system. These intermediaries actively adjust and align the optical paths of multiple laser sources with different wavelengths, enabling coaxial alignment without requiring independent optical systems for each wavelength, thus resolving the contradiction between compact integration and precise optical axis alignment
Solution Approach 2:
The patent employs adjustable and adaptable optical path elements that can dynamically compensate for misalignments. The optical system includes adjustable components that allow for fine-tuning of the optical paths during assembly and maintenance, enabling the system to maintain coaxial alignment despite variations in laser source positions or orientations
2Manufacturing precision
If independent optical systems are employed for each wavelength, then coaxial alignment is achieved, but the system volume increases
Solution Approach 1:
The patent merges multiple optical paths for different wavelengths into a single integrated optical system. By using wavelength-selective beam splitters and combiners, the system combines the optical paths of red, green, and blue laser sources into a common coaxial path, eliminating the need for separate independent optical systems while maintaining precise alignment
Solution Approach 2:
The patent employs universal optical components that can handle multiple wavelengths simultaneously. The beam splitters, combiners, and projection optical elements are designed to work across the visible spectrum, allowing a single optical system to process multiple wavelengths coaxially, thereby reducing overall system volume while maintaining alignment precision
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 configuration reduces the likelihood of non-uniform intensity and color issues, preventing color blocks on the display screen by ensuring that multiple laser lights enter the beam homogenizer coaxially and symmetrically, thereby enhancing the projection system's performance.
Implementation Method 1
The optical path adjusting elements include a combination of a reflective lens, a refractor, a beam splitter, or a prism
Implementation Method 2
The optical path adjusting elements include a combination of a reflective lens, a refractor, a beam splitter, or a prism
Implementation Method 3
The optical path adjusting elements include a combination of a reflective lens, a refractor, a beam splitter, or a prism
Implementation Method 4
each of the polarizing elements includes a polarization splitter and at least one polarization waveplate. the at least one polarization waveplate is configured to rotate a polarization angle of the laser light by 180 degrees
Data Source
AI summary
A coaxial laser light source apparatus includes at least one laser light source module, a beam homogenizer, and optical path adjusting elements. The laser light source module includes multiple laser light sources arranged along a first direction, and each of the laser light sources is configured to emit a laser light along a second direction. The first direction is substantially perpendicular to the second direction, and the laser lights have different properties. The laser lights travel along the second direction toward the beam homogenizer coaxially. The optical path adjusting elements are located between the laser light sources and the beam homogenizer, and the optical path adjusting elements are configured to adjust traveling directions of the laser lights.