Abstract

Scotopic/photopic ratio (S/P ratio, or Rsp) is an absolute measure of a light source’s performance under the mesopic vision state. However, there is more potential for a light source to reach higher mesopic performance at higher correlated color temperatures (CCTs), and these cannot be evaluated. We proposed an Rsp ratio metric to examine relative performance of the S/P ratio at a corresponding CCT. Based on examination of a large set of light sources, we established the Rsp–CCT and Rsp ratio–CCT relations of different light source types. On investigating previously reported high S/P ratio light sources with the proposed metric, it shows high effectiveness in evaluating relative mesopic performance when considering CCT issues.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Quantum dot white light emitting diodes with high scotopic/photopic ratios

Feng Li, Lai You, Chao Nie, Qin Zhang, Xiao Jin, Haiyang Li, Xiaobing Gu, Yan Huang, and Qinghua Li
Opt. Express 25(18) 21901-21913 (2017)

Improvements of mesopic luminance for light-emitting-diode-based outdoor light sources via tuning scotopic/photopic ratios

Tingzhu Wu, Yijun Lu, Ziquan Guo, Lili Zheng, Honghui Zhu, Yao Xiao, Tien-Mo Shih, Yue Lin, and Zhong Chen
Opt. Express 25(5) 4887-4897 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (6)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription