光学低通滤光片
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产品详细介绍
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【产品名称】光学低通滤波器(OLPF)
OLPF安装在阵列式光电成像器件(如CCD、CMOS)前面,以消除高于光电成像器采样空间频率的物
光束成份对成像的干扰。由于CCD、CMOS光感应元件是采用非连续性取像方式,所以有拍摄细纹时
会产生不必要的杂讯,光学低通滤波晶片即是提供消除此杂讯的功能。因细纹的方向不同需要用对
应角度的低通滤波晶片加以消除,又因不同的型号CCD、CMOS光感应元件在规格上有些差异,为针
对不同型号及同时兼顾不同方向的低通效果,所以需用各种不同切割角度(如45度、0度、90度)、
片数、厚度和IR CUT组合成低通滤波晶片设计,才能去除拍摄所带来的杂讯。在使用CCD、CMOS光感
应元件拍摄彩色景物时,因CCD、CMOS对颜色的反应与人眼不同,所以必须将光感应元件所能侦测的
而人眼无法侦测的红外线部份除去,同时调整可见光范围内对颜色的反应,使影像呈现的色彩符合
人眼的感觉,所以在低通滤波晶片表面镀上IR(AR) CUT(干涉式)或配玻璃(吸收式)使用。
技术指标
材料: 光学水晶
角度: 可根据OLPF设计要求制作
尺寸: 1/3、1/4等(外形可根据客户要求制作)
厚度: 单片(1.08、1.22、1.63)
双层(1.83、1.97、2.78)
三层(2.58、3.03、3.43)
镀膜: AR 、IR、夜视IR
光谱透过率
日夜 普通
波长(n m) 透过率(%) 波长(n m) 透过率(%)
400--620 Tavg≥93 400--620 Tavg≥93
400--620 Tmin≥88 400--620 Tmin≥88
650±10 T = 50 650±10 T = 50
720 T < 2 720 T < 2
740~1050 Tavg< 1.5 740~1050 Tavg< 1.5
1050-1100 Tavg< 4 1050-1100 Tavg< 4
850±10 T > 80
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