Segmented Light-Combining Assembly for Similar-Spectrum Beams
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Solution Overview
Problem
Current light-combining methods, such as using dichroic mirrors, are limited to combining light beams with relatively large spectral separation and cannot effectively combine light beams with the same or similar spectra.
Innovation Solution
A light-combining assembly with specific dimming surfaces featuring reflection and transmission regions for light beams with the same or similar spectra, allowing for the combination of light beams through overlapping reflection regions and transmission regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dichroic mirrors are used for light combining, then light beams with large spectral separation can be combined, but light beams with the same or similar spectra cannot be combined
Solution Approach 1:
The dimming surface is segmented into multiple functional regions: a first region for reflecting the first light beam, a second region for transmitting the first light beam, a third region for reflecting the second light beam, and a fourth region for transmitting the second light beam. This segmentation allows different spectral components to be handled by different regions, enabling combination of light beams with similar spectra that cannot be achieved with conventional dichroic mirrors.
Solution Approach 2:
Different regions of the dimming surface are assigned different optical properties (reflection or transmission) for specific wavelength ranges. The first and third regions have high reflectivity for their respective light beams, while the second and fourth regions have high transmissivity. This local quality differentiation enables precise control over light combining for beams with overlapping spectra.
2Illumination intensity
If conventional light-combining methods are used, then simple optical paths can be maintained, but luminous flux and illumination brightness are limited
Solution Approach 1:
The dimming surface serves multiple functions simultaneously: it reflects the first light beam in the first region, transmits the first light beam in the second region, reflects the second light beam in the third region, and transmits the second light beam in the fourth region. This multi-functionality allows a single component to handle multiple light beams with similar spectra, increasing luminous flux without proportionally increasing device complexity.
Solution Approach 2:
The dimming surface is designed as a composite structure with spatially varying optical properties, combining reflective and transmissive characteristics in different regions. This composite design enables the surface to manipulate multiple light beams with overlapping spectra simultaneously, achieving higher illumination brightness while maintaining reasonable optical path complexity.
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 assembly enhances luminous flux and illumination brightness by effectively combining light beams with the same or similar spectra, improving optical path design and reducing light loss.
Implementation Method 1
a first light beam incident on the first region from the first light-input channel is reflected by the first region and then transmitted to the light-combining channel
Implementation Method 2
a second light beam incident from the second light-input channel to the third region is reflected by the third region and then transmitted to the light-combining channel
Data Source
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AI summary
A light-combining assembly (10), a light source module, and a projection device. The light-combining assembly (10) comprises an assembly body. The assembly body has a first light-adjusting surface (110) and a second light-adjusting surface (120). The first light-adjusting surface (110) comprises a first region (111). The second light-adjusting surface (120) comprises a second region (121) and a third region (122) which surrounds the second region (121). The first region (111) and the third region (122) are reflection regions of the same target waveband light beam, and the second region (121) is a transmission region of the target waveband light beam. The first region (111) and the second region (121) are arranged as overlapping to separate a light-combining channel (C), a first light incident channel (L1), and a second light incident channel (L2) opposite to the first light incident channel (L1).