An infrared filter that is formed as a laminated structure including a plurality of {HEAD ~ layers} having {TAIL ~ substantially uniform thicknesses} 
having
An infrared filter that is formed as a laminated structure including a plurality of { HEAD ~ layers } having { TAIL ~ substantially uniform thicknesses }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL