Fly-Eye Lens Group Layout for Uniform Projection Light Mixing
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Solution Overview
Problem
Existing laser-induced fluorescence technologies face challenges in achieving efficient and compact excitation and fluorescence-laser combination solutions, with issues related to etendue dilution and non-uniform light distribution, which affect the brightness and efficiency of projection systems.
Innovation Solution
A fly-eye lens group comprising first, second, and third fly-eye lenses, along with a light combination device, is used to homogenize and correct the angle of excitation light and fluorescence, reducing etendue dilution and ensuring uniform light distribution through a U-shaped configuration and lens arrays, while utilizing a wavelength conversion device to generate desired colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional excitation solutions are used, then the system is simpler, but etendue dilution occurs and light distribution becomes non-uniform
Solution Approach 1:
The optical system is segmented into multiple functional modules: the fly-eye lens group is divided into multiple lens arrays arranged in specific patterns, the wavelength conversion device is separated into distinct conversion sections, and the light combination device is structured as an independent module. This segmentation allows each component to be optimized independently for light homogenization while maintaining overall system manageability and reducing etendue dilution.
2Volume of moving object
If compact excitation solution is implemented, then device size is reduced, but light homogeneity deteriorates
Solution Approach 1:
The fly-eye lens group employs a multi-dimensional arrangement of lens arrays in specific geometric patterns, creating complex light redistribution pathways within a compact volume. This dimensional approach allows achieving uniform light homogenization without proportionally increasing device size, as the light paths are folded and redirected through multiple dimensions rather than requiring linear expansion.
Solution Approach 2:
The optical components are nested within each other in a compact configuration: the wavelength conversion device is positioned within the optical path of the fly-eye lens group, and the light combination device is integrated into the same housing structure. This nesting allows multiple functional elements to occupy overlapping or adjacent spatial volumes, achieving compactness while maintaining light homogeneity through careful optical design.
3Productivity
If fluorescence-laser combination solution is optimized, then efficiency is improved, but system complexity increases
Solution Approach 1:
The fly-eye lens group serves multiple functions simultaneously: it homogenizes light from different sources, corrects beam angles, and facilitates the combination of fluorescence and laser light paths. The light combination device similarly performs multiple roles in directing and merging different light beams. This multi-functionality reduces the need for separate dedicated components, improving efficiency while controlling overall system 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 solution enhances the efficiency and compactness of the projection apparatus by improving light homogeneity and reducing etendue dilution, resulting in higher brightness and improved imaging quality.
Implementation Method 1
The wavelength conversion device includes a wavelength conversion section and a non-wavelength conversion section, the wavelength conversion section absorbs the first excitation light and outputs excited light
Implementation Method 2
the first fly-eye lens and the third fly-eye lens form a double fly-eye structure configured to homogenize the first excitation light emitted from the light source and output the homogenized first excitation light to the wavelength conversion device
Data Source
AI summary
A fly-eye lens group, a light source device, and a projection apparatus. The fly-eye lens group includes: a first fly-eye lens, a second fly-eye lens, and a third fly-eye lens. The first fly-eye lens is parallel to the second fly-eye lens, the first fly-eye lens is perpendicular to the third fly-eye lens, a double fly-eye structure is formed by the first fly-eye lens and the second fly-eye lens, and the third fly-eye lens and the first fly-eye lens also form a double fly-eye structure. The fly-eye lens group is used for homogenizing incident first excitation light, excited light, and second excitation light.