傅里葉變換紅外光譜儀

作者：管理員發布于：2017-03-17  瀏覽(lan)次(ci)數：

產品簡介：
傅里葉(xie)變(bian)換紅(hong)(hong)外(wai)光譜儀（Fourier Transform Infrared Spectrometer，簡寫為FTIR Spectrometer）,簡稱(cheng)為傅里葉(xie)紅(hong)(hong)外(wai)光譜儀。它不同于色散(san)型(xing)紅(hong)(hong)外(wai)分(fen)(fen)光的(de)(de)原理(li)，是(shi)基于對(dui)干(gan)涉后(hou)的(de)(de)紅(hong)(hong)外(wai)光進行傅里葉(xie)變(bian)換的(de)(de)原理(li)而開發的(de)(de)紅(hong)(hong)外(wai)光譜儀，主要由紅(hong)(hong)外(wai)光源(yuan)、光闌、干(gan)涉儀（分(fen)(fen)束器、動鏡(jing)、定(ding)(ding)鏡(jing)）、樣品室、檢測器以(yi)及各種紅(hong)(hong)外(wai)反射鏡(jing)、激(ji)光器、控(kong)制電(dian)路(lu)板和電(dian)源(yuan)組成。可以(yi)對(dui)樣品進行定(ding)(ding)性和定(ding)(ding)量(liang)分(fen)(fen)析，廣(guang)泛應用于醫藥化工、地(di)礦、石(shi)(shi)油、煤炭、環(huan)保、海關、寶(bao)石(shi)(shi)鑒定(ding)(ding)、刑偵(zhen)鑒定(ding)(ding)等領域。
 基本原理：
光(guang)源(yuan)發出的(de)(de)光(guang)被(bei)分束(shu)(shu)(shu)器(qi)（類(lei)似半透(tou)半反(fan)鏡(jing)）分為(wei)兩(liang)束(shu)(shu)(shu)，一(yi)束(shu)(shu)(shu)經透(tou)射到(dao)達(da)動(dong)(dong)鏡(jing)，另一(yi)束(shu)(shu)(shu)經反(fan)射到(dao)達(da)定鏡(jing)。兩(liang)束(shu)(shu)(shu)光(guang)分別經定鏡(jing)和(he)動(dong)(dong)鏡(jing)反(fan)射再回(hui)到(dao)分束(shu)(shu)(shu)器(qi)，動(dong)(dong)鏡(jing)以(yi)一(yi)恒定速度(du)(du)作直線(xian)運(yun)動(dong)(dong)，因而經分束(shu)(shu)(shu)器(qi)分束(shu)(shu)(shu)后(hou)(hou)的(de)(de)兩(liang)束(shu)(shu)(shu)光(guang)形成(cheng)光(guang)程差，產生干涉(she)。干涉(she)光(guang)在(zai)分束(shu)(shu)(shu)器(qi)會合后(hou)(hou)通(tong)過樣品(pin)(pin)池，通(tong)過樣品(pin)(pin)后(hou)(hou)含有(you)樣品(pin)(pin)信息的(de)(de)干涉(she)光(guang)到(dao)達(da)檢測器(qi)，然后(hou)(hou)通(tong)過傅里葉變換對(dui)信號(hao)進行處理，最終得(de)到(dao)透(tou)過率(lv)或(huo)吸光(guang)度(du)(du)隨波數或(huo)波長(chang)的(de)(de)紅外吸收光(guang)譜圖(tu)。