Measuring the luminance of a retroreflective sign
The area of retroreflective signage for traffic control is moving from fixed retroreflective requirements to a traffic scenario/performance based system. CIE Technical Report 54.2, Retroreflection: Definition and Measurement, published in 2001, offers several methods for measuring the coefficient of retro reflected luminance. In this experiment, two CIE 54.2 methods, The Ratio Method and The Direct Luminance Method, along with a new method, Total Luminous Flux Method, are compared in the laboratory and through uncertainty analysis. The results show the Total Luminous Flux method has the potential for the lowest measurement uncertainty and implementation of the Direct Luminance method is not trivial showing errors as large as 20 ％ are easily possible.
luminance retroreflection uncertainty
Miller, Cameron Heimer, Todd Donahue, Tim Schwartz, Matthew Kuniega, David
National Institute of Standards and Technology, USA Gamma Scientific Corporation, USA The 3M Company, USA Pennsylvania Department of Transportation, USA
国际会议
26th Session of the CIE(国际照明委员会（CIE）第26届大会)
北京
英文
852-855
2007-07-04（万方平台首次上网日期，不代表论文的发表时间）