a gain of 0.02 or less of a light reflected in the direction at {HEAD ~ 20°} or more from the specular reflection direction of the incident light, the gain being obtained by normalizing a reflected light intensity using {TAIL ~ a specular reflection intensity} of a standard diffuse plate as 1 
a gain of 0.02 or less of a light reflected in the direction at { HEAD ~ 20 ° } or more from the specular reflection direction of the incident light , the gain being obtained by normalizing a reflected light intensity using { TAIL ~ a specular reflection intensity } of a standard diffuse plate as 1
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH