Hoʻokaʻawale ʻia ka mea i kapa ʻia ʻo narrow-band filter mai ka band-pass filter, a ʻo kona wehewehe ʻana ua like ia me ka band-pass filter, ʻo ia hoʻi, hiki i ka kānana ke hele i ka hōʻailona optical e hele i loko o kahi pūna hawewe kikoʻī. a haʻalele i ke kānana band-pass.Hoʻopaʻa ʻia nā hōʻailona optical ma nā ʻaoʻao ʻelua, a ʻo ka passband o ka kānana narrowband he haiki, ʻoi aku ka liʻiliʻi ma mua o 5% o ka waiwai o ka lōʻihi hawewe waena.
ʻO ka hana nui o ka kānana haʻikiʻi, ʻo ia ke hele i ka mālamalama o kahi lōʻihi hawewe kikoʻī a noʻonoʻo (a i ʻole atenuate) nā ʻāpana optical o ka mālamalama o nā lōʻihi nalu ʻē aʻe.ʻO ka hapalua hawewe ka laulā maʻamau i ka 20nm a i ʻole ka liʻiliʻi, a hiki ke hoʻohana ʻia i ka ultraviolet, ʻike ʻia ke kukui, nā lōʻihi o ka nalu infrared kokoke, a me nā pūʻulu infrared mamao.Hoʻokumu ʻia nā kānana haiki o kā mākou hui e ka evaporation vacuum kiʻekiʻe o nā kiʻi ʻoniʻoni paʻakikī multi-layer a me ka waiho ʻana o nā nanomaterial i kōkua ʻia i ka ion.ʻO ka compactness maikaʻi a me ka wehewehe kiʻi kiʻekiʻe.