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7·1 前言在FLIR 中扫描器的作用是以探测器连续地、完整地分解图象的方法,移动光学系统在探测器阵列平面内形成的象。如图7·1所示,有两种基本类型的扫描器:平行光束扫描器和会聚光束扫描器。前者是一种变换光学角度的装置,如放在最后成象透镜前面的活动反射镜就属于这一类;后者是一种放在最后透镜和象之间的活动反射镜,或其它扫描装置。有七种通用的光学扫描机构:摆动的平面镜、旋转多面体、旋转折射棱镜、旋转光楔、转动透镜、旋转传感器和旋转的V 型镜。把下面各节所讨论的各种基本扫描机构作不同的组合,可以构成一维和二维扫描器。
7.1 INTRODUCTION The function of a scanner in FLIR is to move the image of the optical system formed in the plane of the detector array by means of a detector that continuously and completely decomposes the image. As shown in Figure 7.1, there are two basic types of scanners: parallel beam scanners and converging beam scanners. The former is a means of changing the optical angle, such as moving mirrors placed in front of the final imaging lens fall into this category; the latter is a movable mirror placed between the last lens and the image, or other scanning device . There are seven general types of optical scanning mechanisms: oscillating plane mirrors, rotating polyhedrons, rotary refracting prisms, rotating optical wedges, rotating lenses, rotation sensors and rotating V-mirrors. Different combinations of the basic scanning mechanisms discussed in the following sections make it possible to construct one-dimensional and two-dimensional scanners.