Color schlieren imaging device based on optical fiber coupling LED light sources
A LED light source and optical fiber coupling technology, applied in optics, optical components, instruments, etc., can solve the problems of low utilization rate of light energy, high heat generation, and image quality affected by condenser lenses
Inactive Publication Date: 2015-06-24
中国空气动力研究与发展中心超高速空气动力研究所
View PDF3 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] At present, the commonly used color light source of the schlieren system mainly uses the halogen tungsten light source; while the halogen tungsten light source adopts the thermal radiation light source, and its calorific value is large, so that the condenser lens installed behind the light source is thermally deformed and affects the imaging quality.
At the same time, when using a tungsten-halogen lamp as the light source, color filters of different colors need to be installed behind the condenser lens in order to form colors. The slit or circular hole diaphragm, so that only part of the light beam passes through the diaphragm, and the utilization rate of light energy is low
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0010] Such as figure 1 , 2 As shown, the present invention provides a color schlieren imaging device based on a fiber-coupled LED light source, comprising: n LED light sources 10 of different colors, n condenser lens groups 20, n fiber coupling input ports 30, n optical fibers 4, n Fiber coupling output end 50, Schlieren system 60, wherein, n≥2, each condenser lens group 20 includes a spherical lens 1, a relay lens 2, and an optical combiner 3. The number of the condenser lens group, the fiber coupling input end, the optical fiber, the fiber coupling output end is the same as that of the LED light source.
[0011] The scattered light emitted by n LED light sources 10 first converges into the corresponding condenser lens group 20, passes through the spherical lens 1, the relay lens 2, and the light combiner 3 in turn, and then the scattered light passes through the corresponding optical fiber coupling input port 30, corresponding The optical fiber 4 is transmitted to the cor...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a color schlieren imaging device based on optical fiber coupling LED light sources. The color schlieren imaging device comprises the n LED light sources of different colors, n collecting lens sets, n optical fiber input couplings, n optical fibers, n optical fiber output couplings and a schlieren system, wherein n is larger than or equal to two. Each collecting lens set comprises a spherical lens, a relay lens and a light combining device. Scattered light emitted by the n LED light sources is gathered to the corresponding collecting lens set after passing the corresponding optical fiber input couplings and then passes the spherical lenses, the relay lenses and the light combining devices, the scattered light is transmitted to the corresponding optical fiber output couplings through the corresponding optical fibers and then enters the schlieren system after passing the optical fiber output couplings, and the scattered light is projected to a tested area to form parallel light with even color mixing. By means of the technical scheme, it is avoided that due to the large light source heating amount, a collecting lens installed behind a light source is heated and deformed, and the imaging quality is affected, and the utilization rate of light energy is improved.
Description
technical field [0001] The invention relates to a light source imaging device for displaying wind tunnel flow field in color, in particular to a color schlieren imaging device based on an optical fiber coupled LED light source Background technique [0002] In the research experiment of aerodynamics, the visual display of the flow can provide a direct physical basis for the analysis of the structural shock wave and boundary layer interference of the wave system in the flow field, and can be used as the evidence of the numerical analysis method. Therefore, no matter at home or abroad, the flow field display in wind tunnel experiments has always been concerned by people, and has gradually formed an independent subject branch in experimental fluid dynamics. Among the many methods of flow field display, the optical method has attracted much attention because it does not disturb the flow and does not add tracer particles. The classic shadow method, schlieren method and interferen...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/54
CPCG02B27/54
Inventor 谢爱民柳森黄洁宋强罗锦阳柯发伟郑蕾
Owner 中国空气动力研究与发展中心超高速空气动力研究所