Light source mode measuring instrument
A measuring instrument and light-emitting mode technology, applied in the field of light source mode measuring instruments, can solve the problems of inability to measure the distribution of optical power or light emission characteristics, high cost of equipment and systems, and large error in test results, and achieve light weight and consistency. Sexual, persuasive effect
Active Publication Date: 2020-06-26
ANHUI UNIVERSITY
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Problems solved by technology
The MPD method is rarely used because it is too rough. Although the CPR test method (with IEC61300-3-31 standard specification) is simple and easy to implement, the test results still have large errors and many affected factors. The way of classifying is roughly measured and roughly divided into several grades for evaluation, which cannot measure the distribution of optical power or optical radiation characteristics caused by various modes
For the test method of EF (with IEC61280-4-1 standard specification), it is necessary to use CCD imaging (with the help of beam quality analyzer) and a series of data analysis and processing, the method is too complicated and the cost of the equipment system is high
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[0032] The specific implementation physical structure diagram is as follows Figure 6 As shown, it includes: a light source adapter 601, a beam expanding concave lens 5, an inner lens barrel 603, an annular mode selection mirror 21, a guide rail 605, a photodetector (PD) 3, a transmission plate glass 607, a total reflection mirror 4, and an outer lens barrel 609 , battery compartment and circuit assembly 610, angle scale 611. The light source adapter 601 on the top of the inner lens barrel 603 is a beam-coupling adapter interface, which couples the light beam emitted by the light source into the measuring instrument. The adapter of this interface can be replaced, and is suitable for multiple It is a common type of jumper head, and it can also directly use bare fiber ferrule or directly test light sources such as LED chips without using an interface. For the multimode optical fiber used for optical communication, its divergence angle is generally not more than 15°, so a beam e...
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The invention discloses a light source mode measuring instrument. The light source mode measuring instrument comprises a light source adapter (601), a beam expanding concave lens (5), an inner lens cone (603), an annular mode selection mirror (21), a guide rail (605), a photoelectric detector PD (3), transmission plate glass (607), a holophote (4), an outer lens cone (609), a battery bin and circuit assembly (610) and an angle ruler (611). The annular mode selection mirror and the photoelectric detector (PD) (3) can move towards the same direction, and in the moving process, light of multiplemodes emitted by the multimode light source is different in emergent angle corresponding to different modes and finally can be sequentially reflected to the photoelectric detector (PD) (3). That is tosay, the power of the multimode light source in all propagation modes can be sequentially collected and recorded by the photoelectric detector (PD) (3), and all light propagation modes of the light source can be measured by corresponding to the emergent angle shown by the angle scale on the outer lens cone. The measuring instrument is simple in structure, accurate in measurement and low in cost.
Description
technical field [0001] The invention relates to a light source mode measuring instrument. It can be used for the measurement of the light output mode of the fiber optic light source, and also for the measurement of the light emission mode or light emission characteristics of LD and LED light sources. Background technique [0002] At present, the general methods for measuring or evaluating the modes of light sources can be roughly divided into several types in principle, such as modal power distribution test (MPD), coupling efficiency ratio test (CPR), encircled flux measurement (EF) and so on. The MPD method is rarely used because it is too rough. Although the CPR test method (with IEC61300-3-31 standard specification) is simple and easy to implement, the test results still have large errors and many affected factors. The method of classifying is roughly measured and roughly divided into several grades for evaluation, which cannot measure the distribution of optical power o...
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Login to View More IPC IPC(8): G01J1/42
CPCG01J1/42G01J2001/4247G01J2001/4252
Inventor 鲍文霞阮于华尹正茂王年唐俊
Owner ANHUI UNIVERSITY