Light Source Incident Positioning for Uniform Illumination
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Solution Overview
Problem
Existing methods for reducing unevenness in multiplexed light used in image acquisition devices, such as endoscopes and microscopes, often decrease light guiding efficiency due to the use of optical elements like diffusion elements or beam expanders.
Innovation Solution
A light source device with a light source unit that emits multiple types of lights, an optical waveguide unit for multiplexing, and an incident unit where the maximum separation distances of the lights from a reference position are equal, ensuring uniform incidence on the optical waveguide unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If optical elements such as diffusion elements or beam expanders are used to reduce unevenness in multiplexed light, then uniformity of illumination is improved, but light guiding efficiency decreases
Solution Approach 1:
The patent applies preliminary action by pre-adjusting the incident positions of multiple light sources on the incident surface of the optical waveguide unit. By calculating and setting specific incident positions before light guidance, the system achieves uniform illumination distribution without requiring additional diffusion elements or beam expanders, thus maintaining high light guiding efficiency while improving illumination uniformity
Solution Approach 2:
The patent changes the spatial parameters of light incidence by adjusting the incident positions of multiple light sources according to predetermined values. This parameter adjustment ensures that light from different sources converges uniformly within the optical waveguide unit, achieving illumination uniformity without energy-intensive optical elements
2Stability of the object's composition
If conventional methods are used to uniformize spatial energy distribution, then illumination uniformity is improved, but device complexity increases due to additional optical elements
Solution Approach 1:
The patent extracts and eliminates unnecessary optical elements (diffusion elements, beam expanders) from the light guidance system. By achieving illumination uniformity through optimized incident position arrangement alone, the system removes complex optical components while maintaining uniform spatial energy distribution
Solution Approach 2:
The incident surface of the optical waveguide unit serves multiple functions: it acts as both the light entry interface and the uniformization element. By designing the incident positions according to predetermined values, the same optical component achieves both light guidance and illumination uniformity without requiring separate specialized elements
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 reduces unevenness in the multiplexed light while maintaining light guiding efficiency, preventing intensity unevenness and color tone issues in the illumination.
Implementation Method 1
an optical waveguide unit that multiplexes the plurality of types of lights and then guides multiplexed light
Data Source
AI summary
A light source device includes a light source unit with at least one set of light sources, wherein each of the at least one set of light sources emits a light of a predetermined wavelength band; an optical waveguide unit that multiplexes light from the at least one set of light sources; and an incident unit, wherein on an incident surface of the incident unit, with an optical axis on the incident unit as a reference position, an installation state of each light source is adjusted such that the maximum separation distances are set equal to each other from the reference position to a maximum incident angle of an incident position of the respective light from the at least one set of light sources incident on the incident unit.