An Experimental Approach to A Definition of The Mesopic Adaptation Field
Tatsukiyo (. Uchida, Yoshihiro Ohno
The CIE 191 mesopic luminous efficiency function depends on the luminance of visual adaptation field, therefore, it must be measured to implement the mesopic photometry method. However, the size and shape of the adaptation field are not defined in CIE 191. To define the adaptation field, the effect of the size of adaptation field in peripheral visual task performance must be known, but there are no empirical studies addressing this issue. To obtain such empirical data, vision experiments using a large flat panel display have been conducted to determine whether the task performance of detecting an object depends on global (large field of view) or local (small field of view) adaptation. The results suggested local adaptation (for the field of view angle of 10°) is dominant rather than global adaptation.