Imithombo yokukhanya yahlulwe yaba kukukhanya okubonakalayo kunye nokukhanya okungabonakaliyo. Umthombo wokukhanya osetyenziswa yiisihlalutyi solusuUmatshini ngokusisiseko uneentlobo ezimbini, enye kukukhanya kwendalo (RGB) kwaye enye kukukhanya kwe-UVA. Xa i-RGB ikhanya + i-parallel polarizer, ungathatha umfanekiso wokukhanya okudibeneyo okudibeneyo; xa i-RGB ikhanya + i-cross polarizer, ungathatha umfanekiso wokukhanya okudibeneyo okudibeneyo. Ukukhanya komthi kukwaluhlobo lokukhanya kwe-UV.
Umgaqo kunye nomsebenzisyeentlobo ezi-3 ze-spectrum
Ukukhanya okujikelezileyo okulinganayoumthombo unokuqinisa ukubonakaliswa kwe-specular kwaye ubuthathaka ukubonakaliswa kwe-diffuse; isiphumo sokubonakaliswa kwe-specular sibonakala ngakumbi kumphezulu wesikhumba ngenxa yeoyile yomphezulu, ngoko ke kwimo yokukhanya oku-parallel polarized, kulula ukubona iingxaki zomphezulu wesikhumba ngaphandle kokuphazanyiswa kukukhanya okunzulu kwe-diffuse reflection. Isetyenziswa kakhulu ukujonga imigca emincinci, ii-pores, amabala, njl.njl. kumphezulu wesikhumba.
I-cukukhanya okupholisiweyo yi-rossingakwazi ukugxininisa ukubonakaliswa kwe-diffuse kwaye isuse ukubonakaliswa kwe-specular. Kwimo yokukhanya oku-cross-polarized, ukuphazamiseka kokukhanya kwe-specular reflection kumphezulu wesikhumba kunokuhluzwa ngokupheleleyo, kwaye ukukhanya kwe-diffuse reflection kumaleko anzulu esikhumba kunokubonwa. Ke ngoko, imifanekiso yokukhanya oku-cross-polarized ingasetyenziselwa ukubona uvakalelo, ukudumba, ukubomvu kunye nombala ongaphezulu phantsi komphezulu wesikhumba, kubandakanya amabala e-acne, amabala, ukutshiswa lilanga, njl.njl.
Isibane se-UVisetyenziswa yiisihlalutyi solusuUmatshini ngumthombo wokukhanya we-UVA (ubude be-wavelength 320 ~ 400nm) onamandla aphantsi kodwa amandla anamandla okungena. Umthombo wokukhanya we-UVA ungangena kwi-dermis layer, ngoko ke ungasetyenziselwa ukubona amabala anzulu kunye ne-dermatitis enzulu; kwangaxeshanye, kuba ukukhanya kwe-UV kukwangumsinga we-electromagnetic kwaye kunokuguquguquka, ii-harmonics ziya kwenzeka xa ubude be-radiation yento buhambelana nobude be-radiation ye-ultraviolet ekhanyiswa kumphezulu wayo. I-wave iyavakala, idala ubude be-radiation obutsha bokukhanya, ukuba bubonakala emehlweni omntu, bubanjwe ngumatshini we-skin analyzer. Ngokusekelwe kulo mgaqo, ii-porphyrins, ii-fluorescent residues, ii-hormones kunye nezinye izinto eluswini zinokubonwa. Ukuhlanganiswa kwePropionibacterium kucacile kakhulu phantsi kwendlela yokukhanya yeWood.
Kutheni le nto i-spectra ye-high-endizihlaziyi zolusuzingaphantsi kuneemodeli ezingabizi kakhulu?
Iingcali zokuhlaziya ulusu ezikumgangatho ophezulu (ISEMECO, RESUR) zineentlobo ezintathu kuphela ze-spectrum: i-RGB, ukukhanya okunqamlezileyo, kunye nokukhanya kwe-UV;
II-MEICET MC88kwayeMC10Iimodeli zineentlobo ezi-5 ze-spectrum: i-RGB, ukukhanya okujikelezileyo okulinganayo, ukukhanya okunqamlezileyo okujikelezileyo, ukukhanya kwe-UV (365nm), kunye nokukhanya kukaWood (365+402nm);
Imodeli yobungcali isebenzisa ikhamera ye-SLR yobungcali ekumgangatho ophezulu, kwaye imifanekiso ethathiweyo icacile ngokwaneleyo, ukuze ukwazi ukubona iingxaki kumphezulu wesikhumba: ii-pores, imigca emincinci, amabala, njl.njl. ngaphandle kokusebenzisa ii-polarizers ezihambelanayo ukuphucula ukubonakaliswa kwe-specular. Ngendlela efanayo, ngenxa yokuba umfanekiso wokukhanya kwe-UV ucacile ngokwaneleyo, akusekho mfuneko yokongeza ukukhanya kweWood ukuze ubone iqela lePropionibacterium.
Ngenxa yokubaMC88kwayeMC10Imodeli isebenzisa ikhamera eza ne-iPad, ii-pixels azifaniswa nezekhamera ye-SLR yobungcali, ngoko ke ukukhanya okune-polarized kuyadingeka ukuphucula ukubonakaliswa okucacileyo komphezulu wesikhumba ukuze kubonwe iimbobo, imigca emincinci, amabala kunye nezinye iingxaki. Ukongeza ukukhanya kukaWood kunokwenza iqela lePropionibacterium libonakale ngokucacileyo.
Ixesha lokuthumela: Matshi-29-2022
