2015年世界计量日主题为“计量与光”。
　　我们之所以选择这个主题，是为了与联合国教科文组织举办的“国际光学年”和“2015光学技术”年会相呼应。
　　这是一个全球性的倡议，旨在突出光和光学技术在我们日常生活中扮演着关键角色，以及对未来社会的可持续发展起着重要作用。
　　计量在光学技术的实际应用中起着关键作用，同时，光也是许多尖端测量技术中最核心的元素。
　　我们举办一年一度的“世界计量日”活动，是为了纪念1875年5月20日十七国代表签署了“米制公约”。
　　“米制公约”为科学研究、工程测量、商贸结算以及社会中的测量活动设立了一个全球化合作的框架。
　　“公约”的初衷是在全球范围内保证测量结果的一致性，即便在今天，量值统一也同样重要。
　　国际计量局(BIPM)和国际法制计量组织(OIML)共同策划了“世界计量日”活动。我们希望您喜欢这个网站并邀请贵国、相关计量机构与我们一起共同庆祝这一重要的日子。

　　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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