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