著者

大場 信英

出版者

公益社団法人 応用物理学会

雑誌

応用物理 (ISSN:03698009)

巻号頁・発行日

vol.50, no.3, pp.247-254, 1981-03-10 (Released:2009-02-09)

参考文献数

13

被引用文献数

1

---

The redefinition of the candela, one of the base units of the SI, was adopted at the 16 th Session of the General Conference on Weights and Measuresin Oct. 1979. The new definition is based on the absolute radiometry and the internationally agreed value of the maximum spectral luminous efficacy of radiation. In this review are outlined the necessity and the proposal of the redefinition, procedures taken for the determination of the maximum luminous efficacy, and arguments which were made in the Consultative Committee on Photometry and Radiometry andd the Consultative Committee for Units, on the replacement of the candelaby the lumen and also on the treatment of the SI units including biological efficiency factors.