【摘要】 光学低通滤波器是利用石英晶体的双折射效应和红外截止滤光片设计而成的。它在CCD摄像机传感器前可以有效地降低或消除离散光电探测器对不同空间频率目标成像所产生的拍频效应或条纹混叠现象,并能消除红外光对彩色还原的影响,从而提高了CCD摄像机成像的视觉效果。更多还原

【Abstract】 An optical low pass filter (OLPF) lied in front of the sensor of a CCD camera was designed according to the birefringent effect of crystal and infrared cut-of effect of infrared cut-of optical filter. OLPF can reduce of eliminate effectively the frequency mixing phenomenon when the object with a variety of the spatial frequencies is imaged on the discrete photoelectric detector, and eliminate the color rendition effect of the infrared. The image quality of the CCD camera with OLPF can be improved. Especially, the distinctness can be enhanced when the objects such as fringes or grates are imaged on the sensor of the CCD camera, and the effects of the disturbing fringes of false color can be eliminated.更多还原