The filter 11, wherein {HEAD ~ a refractive index} of {TAIL ~ the plurality} of pattern units is 0.3 1 times a refractive index of the base unit 
of
The filter 11 , wherein { HEAD ~ a refractive index } of { TAIL ~ the plurality } of pattern units is 0.3 1 times a refractive index of the base unit
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH