一、氙氣閃光燈是什么意思
氙(xian)氣閃光(guang)燈,又稱高強度(du)氣體放(fang)電(dian)閃光(guang)燈。氙(xian)氣閃光(guang)燈由(you)氙(xian)氣燈泡、變壓安(an)定器和絕緣導線(xian)組成,利用特殊氙(xian)氣體在超(chao)高電(dian)壓狀態下擊發(fa)放(fang)電(dian)。其工(gong)作原理(li)是,通(tong)過(guo)相機的觸(chu)點觸(chu)發(fa)后,通(tong)過(guo)變壓器,在瞬間內將12V電(dian)源(yuan)升(sheng)至(zhi)2萬伏以(yi)上的高壓脈沖電(dian)壓,激活氙(xian)氣燈泡中的氙(xian)氣在電(dian)弧中產(chan)生6000K--10000K色(se)溫度(du)的強勁光(guang)芒,顏色(se)呈晶鉆白(bai)中略帶紫藍(lan)。
二、氙氣閃光燈與LED閃光燈的區別有哪些
1、概念形式不同
(1)氙氣閃光燈:氙(xian)氣(qi)(qi)(qi)(qi)(讀(du)音xian)是(shi)惰(duo)性氣(qi)(qi)(qi)(qi)體(ti)(ti)中原(yuan)子(zi)(zi)序數較(jiao)(jiao)大的(de)元(yuan)素(也就是(shi)較(jiao)(jiao)重的(de)元(yuan)素),原(yuan)子(zi)(zi)半(ban)徑較(jiao)(jiao)大。在弧(hu)(hu)光放(fang)電(dian)(dian)中,電(dian)(dian)子(zi)(zi)與(yu)氣(qi)(qi)(qi)(qi)體(ti)(ti)發(fa)生彈(dan)性碰(peng)撞損失的(de)能(neng)量(liang)同氣(qi)(qi)(qi)(qi)體(ti)(ti)的(de)原(yuan)子(zi)(zi)量(liang)成反比(bi),所(suo)以(yi)(yi)與(yu)其(qi)他惰(duo)性氣(qi)(qi)(qi)(qi)體(ti)(ti)相比(bi)氙(xian)氣(qi)(qi)(qi)(qi)弧(hu)(hu)光放(fang)電(dian)(dian)時(shi)損失較(jiao)(jiao)小,發(fa)光效率高(gao)。同時(shi),氙(xian)氣(qi)(qi)(qi)(qi)的(de)電(dian)(dian)離電(dian)(dian)勢較(jiao)(jiao)低,放(fang)電(dian)(dian)時(shi)電(dian)(dian)極附近的(de)電(dian)(dian)壓降(jiang)小,這樣可以(yi)(yi)延長電(dian)(dian)極的(de)壽命。又(you)由于氙(xian)原(yuan)子(zi)(zi)結(jie)構的(de)特點(dian),長弧(hu)(hu)氙(xian)燈發(fa)出的(de)光譜和日光非(fei)常(chang)接近。
(2)LED閃光燈:LED是英文(wen)ightemitting diode(發光(guang)(guang)二(er)極(ji)管)的(de)縮寫,它的(de)基本結構(gou)是一(yi)(yi)塊電致發光(guang)(guang)的(de)半導體材料,置于一(yi)(yi)個有引線(xian)(xian)的(de)架子上,然后四周(zhou)用環(huan)氧樹脂(zhi)密封,起到保護內部芯線(xian)(xian)的(de)作用。LED燈由于能耗低(di)亮度(du)高一(yi)(yi)般用在(zai)拍照手機上,用于光(guang)(guang)線(xian)(xian)不補時的(de)補光(guang)(guang)。
2、作用原理不同
(1)氙氣閃光燈原理:當(dang)按下快(kuai)(kuai)門時(shi),快(kuai)(kuai)門反饋給CPU一個(ge)信號,同(tong)時(shi),CPU同(tong)步(bu)向(xiang)三(san)極管輸出一個(ge)控制信號觸(chu)發(fa)電(dian)(dian)(dian)(dian)路(lu),進行閃(shan)(shan)光(guang)。接(jie)著三(san)極管導通(tong)(tong),使觸(chu)發(fa)電(dian)(dian)(dian)(dian)容開始放電(dian)(dian)(dian)(dian),在變壓器的(de)(de)初級上(shang)產生一個(ge)脈沖電(dian)(dian)(dian)(dian)流,這個(ge)電(dian)(dian)(dian)(dian)流有使變壓器的(de)(de)次(ci)級產生近4000v的(de)(de)高壓,激發(fa)閃(shan)(shan)光(guang)燈(deng)內部疝氣(qi)電(dian)(dian)(dian)(dian)離并導通(tong)(tong)。使電(dian)(dian)(dian)(dian)容上(shang)存儲(chu)的(de)(de)電(dian)(dian)(dian)(dian)能瞬間(jian)通(tong)(tong)過閃(shan)(shan)光(guang)燈(deng)管放電(dian)(dian)(dian)(dian)轉化為(wei)光(guang)能,完(wan)成一次(ci)閃(shan)(shan)光(guang)。
(2)LED閃光燈的原理:LED并不是(shi)通過原子內部的(de)電子躍變來(lai)發光的(de),而是(shi)通過將電壓加在(zai)LED的(de)PN結(jie)兩(liang)端,使PN結(jie)本身形成一個能(neng)(neng)級(ji),然后電子在(zai)這個能(neng)(neng)級(ji)上躍變并產生光子來(lai)發光的(de)。