2015年天下计量日主题为“计量与光”
。
　　我们之以是选择这个主题，是为了与团结国教科文组织举行的“国际光学年”和“2015光学手艺”年会相呼应
。
　　这是一个全球性的建议，旨在突出光和光学手艺在我们一样平常生涯中饰演着要害角色，以及对未来社会的可一连生长起着主要作用
。
　　计量在光学手艺的现实应用中起着要害作用，同时，光也是许多尖端丈量手艺中最焦点的元素
。
　　我们举行一年一度的“天下计量日”运动，是为了纪念1875年5月20日十七国代表签署了“米制条约”
。
　　“米制条约”为科学研究、工程丈量、商贸结算以及社会中的丈量运动设立了一个全球化相助的框架
。
　　“条约”的初志是在全球规模内包管丈量效果的一致性，即便在今天，量值统一也同样主要
。
　　国际计量局(BIPM)和国际法制计量组织(OIML)配合策划了“天下计量日”运动
。我们希望您喜欢这个网站并约请贵国、相关计量机构与我们一起配合庆祝这一主要的日子
。

　　The theme for World Metrology Day 2015 is ‘Measurements and Light’.
　　The topic was chosen to align with the UNESCO International Year of Light and Light-based technologies 2015 (IYL 2015), a global initiative designed to highlight the key role light and optical technologies play in our daily lives and their importance for our future and for the sustainable development of the society we live in.
　　Metrology plays a central role in enabling the application of light-based technologies, and in turn, light is at the heart of many of the most important new elements of leading-edge measurement technologies.
　　World Metrology Day is an annual celebration of the signature by representatives of seventeen nations of the Metre Convention on 20 May 1875. The Convention set the framework for global collaboration in the science of measurement and in its industrial, commercial and societal applications. The original aim of the Metre Convention - the world-wide uniformity of measurement - remains as important today as it was in 1875.
　　The World Metrology Day project is realized jointly by the BIPM and the OIML. We hope that you enjoy this site and that your Country or Metrology Organization will join us and participate in this year's event.

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