一、紅外濾光片是什么

紅外濾光片是(shi)(shi)一種可以屏(ping)蔽紫外(wai)(wai)光(guang)、可見光(guang)，僅透紅(hong)外(wai)(wai)光(guang)的(de)光(guang)學濾(lv)光(guang)片(pian)。在光(guang)學領域中紅(hong)外(wai)(wai)濾(lv)光(guang)片(pian)一般是(shi)(shi)由光(guang)學玻(bo)璃鍍膜、光(guang)學塑料（如PC及(ji)PMAA）或光(guang)學璃片(pian)再加入特種染料做成的(de)有色(se)玻(bo)璃濾(lv)光(guang)片(pian)，上述工藝的(de)濾(lv)光(guang)片(pian)只(zhi)能讓(rang)紅(hong)光(guang)通過(guo)，宏觀上講都是(shi)(shi)紅(hong)外(wai)(wai)濾(lv)光(guang)片(pian)。

紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)濾光片主(zhu)要(yao)應(ying)用于(yu)安防監(jian)控(kong)(kong)領(ling)域，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)氣體分析儀，夜視產(chan)品(pin)(pin)(pin)，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)探測器，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)接收機，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)感應(ying)，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)通訊產(chan)品(pin)(pin)(pin)。具體到產(chan)品(pin)(pin)(pin)比如：監(jian)控(kong)(kong)攝相機，遙控(kong)(kong)器，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)幕墻產(chan)品(pin)(pin)(pin)，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)感應(ying)馬(ma)桶、水(shui)龍(long)頭(tou)、洗手(shou)液裝置，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)測溫器，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)打印(yin)機，交(jiao)互式電子白(bai)板，紅(hong)(hong)(hong)(hong)外(wai)(wai)(wai)觸摸屏，指紋識別機，人(ren)臉識別系統等。

該圖片由注冊用戶"天空之城"提供，版權聲明反饋

二、紅外濾光片的分類

從材料(liao)上劃分，有(you)(you)(you)光(guang)(guang)學玻璃(li)鍍膜的，也有(you)(you)(you)有(you)(you)(you)色玻璃(li)制成的，也有(you)(you)(you)塑料(liao)紅外(wai)濾光(guang)(guang)片。這里所指的是近紅外(wai)濾光(guang)(guang)片。如果涉及到中遠(yuan)紅外(wai)，材料(liao)還有(you)(you)(you)Si，ZnSe，Sapphire，CaF2，石英(ying)玻璃(li)等(deng)。

從光學特性上來劃分，有長波通型IR long pass filter和帶通型IR bandpass filter。其中長波通型，包(bao)括(kuo)以下幾種：

1、有色(se)玻璃(li)制(zhi)作而成(cheng)，通(tong)常為黑色(se)，比如IPG-800。它將可見(jian)光(guang)吸收，允許透過紅(hong)外光(guang)。如果透過此紅(hong)外濾光(guang)片去看太陽(yang)(yang)，依然可以看見(jian)一(yi)個(ge)紅(hong)紅(hong)的太陽(yang)(yang)。適合用于紅(hong)外呈像。

2、在(zai)光(guang)(guang)學(xue)白(bai)玻璃(li)上(shang)通過真(zhen)空(kong)鍍(du)膜制成紅外濾(lv)光(guang)(guang)片(pian)，比如IPGC-720，這種類型的又叫(jiao)光(guang)(guang)學(xue)冷鏡(jing)，它將可見光(guang)(guang)反射(she)，讓(rang)紅外光(guang)(guang)透過。外觀看起來是銀(yin)色的，像是一(yi)面鏡(jing)子。如果是中遠紅外的濾(lv)光(guang)(guang)片(pian)，要在(zai)Si，Sapphire，石(shi)英玻璃(li)上(shang)鍍(du)膜。

3、由特種塑料(liao)制成(cheng)的紅(hong)外塑料(liao)濾光片，外觀黑色，如果(guo)透過此紅(hong)外濾光片去看太陽，也可(ke)以(yi)(yi)看見一個紅(hong)紅(hong)的太陽。這種塑料(liao)的材料(liao)可(ke)以(yi)(yi)是PC也可(ke)以(yi)(yi)是PMMA。

再說帶通型，帶通濾光片都是(shi)(shi)由真(zhen)空鍍膜(mo)而成。對于近紅外(wai)的帶通來說(shuo)，是(shi)(shi)在白玻璃(li)上鍍膜(mo)。如果(guo)是(shi)(shi)中遠紅外(wai)，則會在Sapphire上鍍膜(mo)。其中近紅外(wai)的帶通濾光(guang)片相(xiang)應(ying)的光(guang)源主(zhu)要是(shi)(shi)紅外(wai)IR LED和紅外(wai)激光(guang)，所(suo)(suo)以主(zhu)要波長(chang)有(you)808nm，850nm，905nm，940nm，1064nm，也(ye)有(you)不常用(yong)(yong)的780nm。所(suo)(suo)以常用(yong)(yong)的近紅外(wai)濾光(guang)片的波長(chang)主(zhu)要就是(shi)(shi)這些。相(xiang)應(ying)的型號(hao)有(you)BPF-850，NBF-808，BPF-940。