The luminaire distribution photometer is a large-scale precision optical test equipment, which is an essential equipment for luminaire distribution photometric measurement. The traditional distribution photometer is mainly a mechanical structure, and the whole three-dimensional space luminaire light is measured by mechanical control probe rotation. Strong distribution.
The traditional distributed photometers currently under development mainly include rotary mirror type distribution photometers, motion mirror type distribution photometers and rotary lamp type distribution photometers, etc. °CIEl27-1997 on LED optics and electricity The test is required, and it is also the basis for LED test using traditional photometric method.
In recent years, with the development and maturity of CCD imaging technology, and because of its good visualization effect, simple and convenient, people began to gradually adopt imaging technology for photometric measurement. Currently, it has been used in imaging technology-based luminance meter to assist traditional types. The brightness meter. Based on the imaging photometric measurement of the light intensity distribution of the lamp, the research is still in the research stage because it is more complicated and the precision is difficult to improve.
The distributed photometric measurement of luminaires is an important part of quality control in luminaire design and lighting design. Especially with the development of new light sources such as LEDs and emerging lighting technologies, it poses new challenges for luminaire distribution luminosity measurement. Therefore, according to the current development status And the demand, the development of a distributed photometer based on the imaging photometric method of LED light intensity distribution test.
At present, the quality of products in the domestic lighting market is mixed. Every year, a large number of new lamps are flooded into the market. The evaluation of actual lighting effects is often not effectively evaluated.
At present, the distribution of light intensity of domestic measuring lamps adopts mechanical distribution photometer, which is bulky and expensive. Only large lighting companies or research institutes will purchase them. However, some domestic manufacturers of photometric measuring instruments have better performance. Some aspects can reach the international level, but also for domestic manufacturers. There are also many international photometric measuring instruments manufacturers, and the products are also very mature, such as Germany, the United States and other countries.
The instrument for measuring the light environment by imaging technology has been used in some scientific research experiments and practical applications. The measuring instrument based on the principle of imaging luminosity has great development space. The LED imaging photometer system studied in this paper is a new type of photometric measurement. The system can collect the light intensity distribution data of the luminaire simply and quickly, and obtain the light distribution curve.
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