Ultraviolet rays are constantly affecting human health, especially causing harm to the eyes. Therefore, anti ultraviolet glasses and lenses are of great significance for human health and safety. At present, there are simple and qualitative testing equipment for the UV protection performance of lenses, but their measurement accuracy and traceability have not been verified. Accurate and quantitative UV protection testing requires the use of high-precision grating spectrometers, making it impossible to conduct on-site testing. Therefore, this article presents a portable anti-UV detection system for eyeglass lens, integrating electronic components such as UV light sources, UV sensors, micro-controllers, and display screen. Experimental verification has shown that the system can meet the testing requirements of various lenses in the market.
This article studies the key technical parameters such as “short wavelength boundary,” “energy density,” “energy output uniformity,” and “pulse duration” of xenon light source equipment for therapeutic use, determines the measurement standard, and presents an applicable metrological performance evaluation method for the equipment. The evaluation procedure presented in this article has been performed on several typical types of xenon light source equipment for therapeutic use widely used in China, and the experimental results show that the evaluation method presented in this article is scientific and effective, and can be adopted for the periodic calibration of the equipment, in order to establish the metrological traceability system of the equipment.
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