Automotive headights feem ntau muaj ntawm peb ntu: teeb tsa teeb, tsom kwm thiab phim daim iav (astigmatism daim iav).
1. Noob
Cov qhov muag teev siv nyob rau hauv lub taub hau tsheb yog incandescent qij, halogen tungsten qhov muag teev, lub teeb ci tshiab arc teeb thiab lwm yam.
(1) Incandescent bemb: nws cov ntsiab lus yog ua los ntawm tungsten hlau (tungsten muaj lub siab melting taw tes thiab muaj zog teeb). Thaum tsim khoom, nyob rau hauv thiaj li yuav nce kev pabcuam lub neej, muaj cov noob tau sau nrog cov roj inert (nitrogen thiab nws sib xyaw ntawm cov roj inert). Qhov no tuaj yeem txo cov evaporation ntawm tungsten hlau, nce qhov kub ntawm cov ntsiab lus, thiab txhim kho lub luminous efficiency. Lub teeb ci los ntawm lub teeb daj incandescent muaj lub tinge daj.
(2) tungsten halide teeb Mus rau qhov chaw kub nyob ze rau Falament kub, thiab yog decomposed los ntawm tshav kub, yog li ntawd lub tungsten tau rov qab los rau filament. Qhov tso tawm halogen tseem diffuse thiab koom nrog hauv cov kev sib tw tom ntej, yog li kev sib tw txuas ntxiv, yog li tiv thaiv kev tshaj lij ntawm lub teeb ntawm cov noob. Tungsten Halogen lub teeb lub teeb loj yog me me, lub qhov muag plhaub ua tau zoo thiab lub sijhawm muaj zog, thiab lub neej muaj 2 txog 3 npaug.
(3) Kev pib lub siab tshiab ntawm Arc Teeb: Lub teeb no tsis muaj ib txwm muaj teeb meem nyob rau hauv lub teeb. Hloov chaw, ob lub electrodes tau muab tso rau hauv lub raj quartz. Lub raj ntim nrog Xenon thiab Trace hlau (lossis cov hlau ua haujlwm), thiab thaum muaj cov roj ntsha hluav taws xob hauv electrode (5000 ~ 12000v), roj av pib ionize thiab ua hluav taws xob. Cov pa roj atoms yog nyob rau hauv lub xeev zoo siab thiab pib emit teeb vim kev hloov pauv ntawm cov tshuab hluav taws xob. Tom qab 0.1s, ib qho me me ntawm mercury vapor yog evaporated ntawm cov elecury arc paug, thiab tom qab ntawd hloov mus rau lub teeb halcurred arc tawm, thiab tom qab ntawd hloov mus rau lub teeb halcurred arc tshem tawm, thiab tom qab ntawd hloov mus rau lub teeb halcurred arc tshem tawm, thiab tom qab ntawd hloov mus rau hauv Halide Arc teeb tom qab kub nce. Tom qab lub teeb mus txog qhov ua hauj lwm ib txwm ua haujlwm ntawm lub teeb, lub zog ntawm kev tswj cov kev paug ARC yog tsawg heev (li 40% ntawm hluav taws xob tau txais kev cawmdim.
