He mea maʻamau ka noe a me ka ua. I kēia mau kūlana ʻike haʻahaʻa, hiki ke paʻakikī ka hoʻokele ʻana a i ʻole ka hele wāwae ʻana ma ke alanui no nā mea hoʻokele a me nā poʻe hele wāwae, akā ke hāʻawi nei ka ʻenehana kukui alanui LED hou i nā mea huakaʻi palekana.
Kukui alanui LEDHe kumu kukui anu paʻa, nona nā ʻano o ka palekana o ke kaiapuni, ʻaʻohe haumia, hoʻohana mana haʻahaʻa, pono kukui kiʻekiʻe, a me ke ola lōʻihi. No laila, e lilo ke kukui alanui LED i koho maikaʻi loa no ka hoʻoponopono hou ʻana i nā kukui alanui e mālama ana i ka ikehu. ʻO ke kukui alanui LED kahi kumu kukui paʻa kiʻekiʻe e pili ana i ka hui semiconductor pn, hiki ke hoʻopuka i ka mālamalama me ka ikehu uila nāwaliwali. Ma lalo o kekahi voltage bias maikaʻi a me ke au injection, ʻo nā lua i hoʻokomo ʻia i loko o ka ʻāpana p a me nā electrons i hoʻokomo ʻia i loko o ka ʻāpana n e hoʻolaha i ka ʻāpana hana ma hope o ka hoʻohuihui radiative a hoʻopuka i nā photons, e hoʻololi pololei i ka ikehu uila i ka ikehu māmā. ʻO ke kukui alanui LED kahi kumu kukui paʻa kiʻekiʻe e pili ana i ka hui semiconductor pn, hiki ke hoʻopuka i ka mālamalama me ka ikehu uila nāwaliwali. Ma lalo o kekahi voltage bias maikaʻi a me ke au injection, ʻo nā lua i hoʻokomo ʻia i loko o ka ʻāpana p a me nā electrons i hoʻokomo ʻia i loko o ka ʻāpana n e hoʻolaha i ka ʻāpana hana ma hope o ka hoʻohuihui radiative a hoʻopuka i nā photons, e hoʻololi pololei i ka ikehu uila i ka ikehu māmā.
Hiki ke hōʻike ʻia nā pono o ke kukui alanui LED i ka noe a me ka ua i ʻekolu mau ʻano:
1. Ke kuhikuhi kūlohelohe o ke kukuna kukui i hoʻopuka ʻia;
2. Nā ʻano nalu o nā LED keʻokeʻo;
3. Ke alapine (frequency) o kēia nalu hoʻohālikelike ʻia me nā kumu kukui ʻē aʻe.
ʻO ka ʻokoʻa ma waena o ke kukui LED a me nā kumu kukui ʻē aʻe a pau, ʻo ia ka nalu nui e hoʻopuka ai i ka ikehu, a pehea e launa pū ai nā kulu wai a i ʻole e hoʻopilikia ai i ke kukuna ma kēlā nalu, ʻoiai ke loli ka nui o nā kulu wai.
ʻO nā kumu kukui e hoʻopuka nui i ka ikehu kukui ma nā nalu polū o ka spectrum ʻike ʻia, e like me nā LED, hana maikaʻi ma mua o nā kumu kukui ʻē aʻe i nā kūlana ʻike haʻahaʻa.
ʻOi aku ka pōkole o nā nalu o ke kukui ma ka ʻāpana poni o ka pae spectral ma mua o ke kukui ma ka ʻāpana ʻulaʻula. ʻO ka maʻamau, hoʻouna nā ʻāpana mahu wai i ka mālamalama ma ka pae melemele-ʻalani-ʻulaʻula, akā hoʻopuehu pinepine lākou i ka mālamalama polū. Hiki paha kēia ma muli o ka like o nā ʻāpana wai me nā nalu polū. No laila, i ka wā e akāka ai ka lani ma hope o ka ua a i ʻole ka ea i ka hāʻule (ʻoi aku ka liʻiliʻi o nā ʻāpana ʻāwiliwili i ka lewa, ʻo ka hoʻopuehu molekala nui), ma lalo o ka hopena hoʻopuehu ikaika o nā molekala lewa, hoʻopuehu ʻia ka mālamalama polū e hoʻopiha i ka lewa, a ʻike ʻia ka lani he polū. Ua kapa ʻia kēia hanana ʻo Rayleigh scattering.
I nā kūlana ʻike haʻahaʻa, piʻi ka nui o nā ʻāpana wai a hiki i kahi i like ʻole ai ko lākou nui me nā nalu kukui polū. I kēia manawa, ua like ko lākou nui me nā nalu melemele-ʻalani-ʻulaʻula. Hoʻopuehu a kāohi nā ʻāpana wai i ka mālamalama ma kēia mau kāʻei, akā hele i ka mālamalama polū. ʻO ia ke kumu e ʻike ʻia ai ka lā i kekahi manawa he uliuli a ʻōmaʻomaʻo paha ma muli o ka noe.
Mai ka nui o nā ʻāpana wai a i ka nalu lōʻihi, ʻo nā kukui alanui LED ke koho maikaʻi loa no nā kūlana ʻike haʻahaʻa. ʻO ka mahana kala a me ka hoʻolālā kukui e hana i nā kūlana alanui maikaʻi loa i ka wā ua a me ka noe. Ma ka hoʻomaikaʻi ʻana i ka ʻike, mālama nā kukui alanui LED i nā alanui i ka palekana i nā ua a me nā wahi noe.
Inā makemake ʻoe i ke kukui alanui LED, e ʻoluʻolu e hoʻokaʻaʻike aku i ka mea hana kukui alanui LED TIANXIANGheluhelu hou aku.
Ka manawa hoʻouna: ʻAukake-02-2023