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Self-service kiosk for testing sunglasses

机译:自助服务亭,用于测试太阳镜

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摘要

Abstract Background Sunglasses users may only be assured on their ultraviolet protection by purchasing certified products, however they are not able to check if sunglasses are still ultraviolet (UV) protected as they age, unless they resort themselves to a professional who is qualified for using a spectrophotometer and is acknowledged on the standards for providing a report for the user. Current literature establishes safe limits on the exposure of the eyes relatively to the ultraviolet radiation exposure for the UVA and UVB ranges (280 nm – 400 nm). The UV protection is category dependent. Sunglasses are categorized from 0 to 4 and the categories are determined by the lenses transmission’s percentage on the visible range (380 nm – 780 nm). Methods In order to overcome inaccessibility of such measurements on sunglasses, a prototype for testing ultraviolet protection on sunglasses, according to Brazilian Standards, has been developed for amateur use. The system consists of assembling UVA and UVB light sources and two UV responsive photodiode sensors, with Erythema action response for measuring UV protection; for categories measurements, combination of white light and LEDs were used for the visible range, as well as a light sensor having spectral response similar to the human eye. Electronics has been developed for controlling the measurements and software has been implemented for providing the report as well as for the user’s interface. Results All the system was embedded as a self-service touch screen kiosk and provides transmittance measurements that are within the deviation limit required by NBR15111, i.e., 0.25%. Measurements were performed in over 45 sunglasses and compared to CARY 5000 – VARIAN spectrophotometer and present a good correlation for the measurements of transmittance in the visible spectral range (r2 = 0.9999) and in the ultraviolet range (r2 = 0.9997). Conclusions The prototype identifies the UV protection, for non-corrective sunglasses, according to category of the lens and is available for the public. In addition to educating the population about the importance of wearing protected sunglasses, the prototype has also allowed the public to have access to information about the quality of protection of their own sunglasses in an easy and free testing method.
机译:摘要背景太阳镜用户只能通过购买认证的产品来确保自己的紫外线防护能力,但是他们无法检查太阳镜是否随着年龄的增长仍受到紫外线保护,除非他们求助于有资格使用太阳镜的专业人员。分光光度计,并在为用户提供报告的标准上得到认可。当前的文献相对于UVA和UVB范围(280 nm – 400 nm)的紫外线辐射,对眼睛的暴露建立了安全极限。紫外线防护取决于类别。太阳镜的分类范围是0到4,其类别取决于可见光范围(380 nm – 780 nm)中镜片透射率的百分比。方法为了克服这种在太阳镜上无法测量的问题,根据巴西标准,已经开发出一种用于测试太阳镜紫外线防护的原型,供业余使用。该系统由组装UVA和UVB光源以及两个对紫外线敏感的光电二极管传感器组成,并具有红斑动作响应以测量紫外线防护。对于类别测量,白光和LED的组合用于可见范围,以及具有类似于人眼的光谱响应的光传感器。已开发出用于控制测量的电子设备,并已实现了用于提供报告和用户界面的软件。结果所有系统均作为自助式触摸屏亭嵌入,并且提供的透射率测量值在NBR15111要求的偏差极限之内,即0.25%。在超过45副太阳镜中进行了测量,并与CARY 5000 – VARIAN分光光度计进行了比较,在可见光谱范围(r2 = 0.9999)和紫外线范围(r2 = 0.9997)的透射率测量中具有良好的相关性。结论该原型根据镜片的类别确定了非矫正太阳镜的防紫外线功能,并已向公众提供。除了向人们介绍戴防护墨镜的重要性之外,该原型还使公众能够通过一种简单且免费的测试方法获得有关自己太阳镜的防护质量的信息。

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