Ingabe iso le-940nm livikelekile?

I-940NM LED ingaba ngephakheji ngohlobo lwe-SMD LED kanye nohlobo lwamalambu we-LED. Kepha ngesikhathi sohlelo lokusebenza, ukukhanya kwe-IR kuholele ku-940nm Wavelength kuphephile?

Ukuphepha kwe-940 NM (Nanometer) Wavengeth, esetshenziswa kakhulu ku-infrared (IR) ukukhala okukhanyisayo (ama-LED) kanye nama-lasers, kuyisihloko sokukhathazeka ngenzalo emehlweni abantu. Ukunquma ukuthi u-940 NM uphephile ngamehlo, kubalulekile ukuqonda uhlobo lwale wavelength, ukuxhumana kwalo ngeso, kanye namazinga okuphepha ahambisana nawo.
Ukukhanya okungenampilo kuwa ngaphakathi kwe-electromagnetic spectrum, ngamagagasi isikhathi eside kunaleyo yokukhanya okubonakalayo. Iso lomuntu liyazwela ama-wavelengths asuka ku-wavelength cishe ka-400nm. Ngaphandle kwalolu banga, ukukhanya kuba ngamehlo. Kodwa-ke, lokhu akusho ukuthi ngeke kuthinte izicubu ze-ocular.
Ukulimala okungaba khona okubangelwa ukuvezwa kwemisebe ye-infrared kuncike ezintweni ezahlukahlukene ezifana ne-wavelength, ukubonwa kwamandla, ubude besikhathi, kanye nokuzwela kwezicubu ze-ocular ku-wavelength ethile. Endabeni ka-940 NM, ngokuvamile kubhekwa njengokuphephile ngamehlo ngaphansi kwezimo ezijwayelekile zokusebenza.
Isizathu esiyinhloko sokuphepha kwamehlo ka-940 NM ukumuncwa kwayo okuphansi okuphansi yi-cornea, lens, kanye ne-retina. I-cornea, ukuba ungqimba lwangaphandle kwamehlo, isebenza njengesithiyo esivikelayo ezintweni zakwamanye amazwe nokukhanya ngokweqile. Ithatha iningi lokukhanya kwe-UV nengxenye ebalulekile yokukhanya okufushane okubonakalayo, kepha kusobala okusobala kuya ku-940 NM infrared.
Ngokufanayo, ilensi, etholakala ngemuva kwe-cornea, imunca ukukhanya kwe-UV nokukhanya okubonakalayo, kepha kusobala futhi kusobala ekukhanyiseni okungenamkhawulo, kufaka phakathi i-940 NM. I-retina, okuyizicubu ezibucayi ezikhanyayo ngemuva kwamehlo, ukukhathazeka okubaluleke kakhulu uma kukhulunywa ngokuphepha kwamehlo. Kodwa-ke, ngo-940 NM, i-retina nayo iyazwela, inciphisa ubungozi bomonakalo.
Kubalulekile ukuqaphela ukuthi ngenkathi i-940 NM ibhekwa njengephephile yamehlo ngaphansi kwezimo ezijwayelekile zokusebenza, ukuvezwa isikhathi eside noma okukhulu kakhulu kule wavelength kungadala ukulimala. I-International Electrotechnical Commission (IEC) isungule amazinga okuphepha ukuqinisekisa ukusetshenziswa okuphephile kwama-lasers neminye imisebe ye-optical, kufaka phakathi infrared.
Ngokusho kwe-IEC 60825-1 standard, ama-lasers akhipha ku-940 NM awela ekilasini 1 noma ekilasini 1m, ngokuya ngokukhipha kwamandla. Ama-lasers 1 ama-lasers abhekwa njengephephile ngaphansi kwazo zonke izimo zokusetshenziswa okujwayelekile, okubandakanya ukubukwa isikhathi eside, ngenkathi ama-lacers ahlala isikhathi eside ephephile uma ebukwa ngamathuluzi abonakalayo (njengokukhulisa izibuko) kodwa angabeka engcupheni uma ebukwa ngqo ngeso elinqunu.
Amazinga we-IEC achaza nemikhawulo yokuvezwa, echaza ukuvezwa okuphezulu okuvumelekile (i-MPE) yama-wavelength ahlukahlukene nobudala. Le mikhawulo isuselwa ocwaningweni olunzulu futhi inaka amandla okulimazeka okushisayo nokwenziwa kwesithombe kwezicubu ze-ocular.
Ukuqinisekisa ukuphepha kwamehlo, abakhiqizi bamadivayisi akhipha ukukhanya okukhanyayo okungu-940 NM, njenge-IR LEDs kanye nama-Laser Diodes, kumele alandele lezi zindinganiso zokuphepha. Bafaka izici ezifanele zokuphepha, njenge-Beam Divergence, ukulinganiselwa kwamandla, kanye nezihlungi ze-Optical, ukunciphisa ubungozi bokulimala kwamehlo.

Ekuphetheni, ukukhanya okungu-940 NM infrared kuthathwa njengokuphepha kwamehlo ngaphansi kwezimo ezijwayelekile zokusebenza. Ukutholwa kwayo okuphansi okuphansi okwenziwe yizicubu ze-ocular, ikakhulukazi i-cornea, lens, kanye ne-retina, kunciphisa ubungozi bomonakalo. Kodwa-ke, ukubambelela kumazinga okuphepha, okufana nalokho okusungulwe yi-IEC, kubalulekile ukuqinisekisa ukusetshenziswa okuphephile futhi kuvikele noma yikuphi ukulimala okungaba khona okuhlotshaniswa nokuvezwa okukhulu kule wavelength.