一、紅外濾光片是什么

紅外濾光片是(shi)一種(zhong)可(ke)以屏蔽紫外(wai)光(guang)(guang)(guang)、可(ke)見光(guang)(guang)(guang)，僅透紅外(wai)光(guang)(guang)(guang)的(de)光(guang)(guang)(guang)學(xue)(xue)濾光(guang)(guang)(guang)片(pian)。在光(guang)(guang)(guang)學(xue)(xue)領(ling)域中紅外(wai)濾光(guang)(guang)(guang)片(pian)一般是(shi)由(you)光(guang)(guang)(guang)學(xue)(xue)玻璃(li)(li)鍍(du)膜、光(guang)(guang)(guang)學(xue)(xue)塑料（如PC及PMAA）或光(guang)(guang)(guang)學(xue)(xue)璃(li)(li)片(pian)再加(jia)入(ru)特種(zhong)染料做成的(de)有色玻璃(li)(li)濾光(guang)(guang)(guang)片(pian)，上述工藝的(de)濾光(guang)(guang)(guang)片(pian)只能(neng)讓紅光(guang)(guang)(guang)通過，宏觀上講都是(shi)紅外(wai)濾光(guang)(guang)(guang)片(pian)。

紅(hong)(hong)外濾光片主(zhu)要(yao)應用于安防監(jian)(jian)控領(ling)域，紅(hong)(hong)外氣體(ti)分析儀(yi)，夜視(shi)產品(pin)，紅(hong)(hong)外探測器(qi)(qi)，紅(hong)(hong)外接收機，紅(hong)(hong)外感應，紅(hong)(hong)外通訊產品(pin)。具(ju)體(ti)到(dao)產品(pin)比如：監(jian)(jian)控攝相機，遙控器(qi)(qi)，紅(hong)(hong)外幕墻產品(pin)，紅(hong)(hong)外感應馬桶、水龍頭、洗手液裝置，紅(hong)(hong)外測溫器(qi)(qi)，紅(hong)(hong)外打印機，交互式電子白板，紅(hong)(hong)外觸摸屏，指紋識別(bie)機，人(ren)臉識別(bie)系統(tong)等(deng)。

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

從材料上劃分(fen)，有(you)(you)光(guang)學玻(bo)璃鍍膜的，也(ye)有(you)(you)有(you)(you)色玻(bo)璃制(zhi)成(cheng)的，也(ye)有(you)(you)塑料紅(hong)外(wai)(wai)濾(lv)光(guang)片。這里所指的是近(jin)紅(hong)外(wai)(wai)濾(lv)光(guang)片。如(ru)果涉及到中遠紅(hong)外(wai)(wai)，材料還有(you)(you)Si，ZnSe，Sapphire，CaF2，石英玻(bo)璃等。

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(bo)通型，包(bao)括以下(xia)幾種：

1、有(you)色玻璃制作而(er)成，通(tong)常為黑(hei)色，比如IPG-800。它將可見(jian)光(guang)(guang)吸收，允許透(tou)過紅(hong)(hong)外(wai)(wai)光(guang)(guang)。如果(guo)透(tou)過此(ci)紅(hong)(hong)外(wai)(wai)濾(lv)光(guang)(guang)片去看(kan)太陽，依然可以看(kan)見(jian)一個紅(hong)(hong)紅(hong)(hong)的太陽。適合(he)用(yong)于紅(hong)(hong)外(wai)(wai)呈像。

2、在光(guang)(guang)學(xue)白玻璃上通過(guo)真空鍍膜制成紅(hong)外(wai)濾光(guang)(guang)片(pian)，比如(ru)IPGC-720，這種類型的(de)又叫(jiao)光(guang)(guang)學(xue)冷鏡(jing)，它將可見光(guang)(guang)反射，讓紅(hong)外(wai)光(guang)(guang)透過(guo)。外(wai)觀看起來(lai)是(shi)銀(yin)色的(de)，像是(shi)一面鏡(jing)子。如(ru)果是(shi)中遠紅(hong)外(wai)的(de)濾光(guang)(guang)片(pian)，要在Si，Sapphire，石英玻璃上鍍膜。

3、由特種塑(su)料(liao)制成的(de)紅(hong)(hong)外塑(su)料(liao)濾(lv)(lv)光(guang)片(pian)，外觀(guan)黑(hei)色，如果透過此紅(hong)(hong)外濾(lv)(lv)光(guang)片(pian)去看(kan)太(tai)陽(yang)，也可(ke)以(yi)看(kan)見(jian)一個紅(hong)(hong)紅(hong)(hong)的(de)太(tai)陽(yang)。這種塑(su)料(liao)的(de)材料(liao)可(ke)以(yi)是PC也可(ke)以(yi)是PMMA。

再說帶通型，帶通濾光片都是(shi)由真空鍍(du)(du)膜而成。對于近(jin)紅外(wai)(wai)的(de)(de)帶(dai)通來說，是(shi)在白玻(bo)璃上鍍(du)(du)膜。如果是(shi)中(zhong)遠紅外(wai)(wai)，則會在Sapphire上鍍(du)(du)膜。其中(zhong)近(jin)紅外(wai)(wai)的(de)(de)帶(dai)通濾光(guang)(guang)片(pian)(pian)相(xiang)應的(de)(de)光(guang)(guang)源(yuan)主(zhu)要是(shi)紅外(wai)(wai)IR LED和紅外(wai)(wai)激光(guang)(guang)，所(suo)以主(zhu)要波長有808nm，850nm，905nm，940nm，1064nm，也有不常用的(de)(de)780nm。所(suo)以常用的(de)(de)近(jin)紅外(wai)(wai)濾光(guang)(guang)片(pian)(pian)的(de)(de)波長主(zhu)要就是(shi)這些。相(xiang)應的(de)(de)型號有BPF-850，NBF-808，BPF-940。