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红外滤光片有哪些应用范围呢?

文章来源: 人气:2803 发表时间:2017-07-06


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红外滤光片主要应用于安防监控领域,红外气体分析仪,夜视  产品,红外探测器,红外接收机,红外感应,红外通讯产品。具体到产品比如:监控摄相机,遥控器,红外幕墙产品,红外感应马桶、水龙头、洗手液  装置,红外测温器,红外打印机,交互式电子白板,红外触摸屏,指纹识别机等。 

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红外滤光片作用,即滤除红外线: 彩色监控摄像头CCD也可感应红外线,就是因为会感应红外线,会导致D.S.P无法算出正确颜色,,因此须加一片  滤光片,把光线中红外线部份隔开,所以只有彩色CCD需要装滤光片,黑白就不用了修整进光: 因为监控摄像头CCD上是一颗颗的感光体(CELL)构成,最好  光线是直射进来,但为了怕干扰到邻近感光体,就需要对光线加以修整,因此那片滤光片不是玻璃,而是石英片,利用石英的物理偏光特性,把进来的光线 ,保留直射部份,反射掉斜射部份,避免去影响旁边的感光点.

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2、修整光线 上文说到, 利用石英的物理偏光特性,把进来的光线,保留直射部份,反射掉斜射部份,但只能对一个方向修整,通常监控摄像头只考 虑到水平分辨率,因此只对光线做水平修整,因此监控摄像头在贴滤光片时方向要对,不可弄反了.那如果垂直光线也要修整的话怎办?很简单,就黏两片 ,把其中一片转90度就行了,因此就有这种也叫”两片式”的滤光片,一片用在水平修整,一片用在垂直修整,其中一片再做IR-Coating 来滤红外线.。 

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