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前言由于存在着选择合适透镜的问题,热成象系统在工业和军事上的若干应用还没有得到发挥。远距离应用系统要求工作在3-5微米或8-14微米大气窗口的大直径透镜就是一个特殊的例子。在作远距离监视时使用者的典型要求是0.1毫孤的分辨率。探测器的尺寸一般大于50微米,所以要求焦距在500毫米以上。即使在F/2时,这也意味着透镜直径应在250毫米以上。对10微米的波长,衍射极限本身就要求至少200毫米的透镜直径。作为菲利蒲公司热电光导摄象管<1>研制计划的一部分,我们还研究了可能实现的光学系统。我们发现,目前还没有合适的透镜能使热电光导摄象管用于远距离观察。热电光导摄
Preface Due to the problem of selecting suitable lenses, there are several industrial and military applications of thermal imaging systems that have not yet been developed. Long-distance applications require large diameter lenses operating in the 3-5 micron or 8-14 micron atmosphere window as a special case. The typical requirement for users at long range surveillance is 0.1 millisecond resolution. The size of the detector is generally greater than 50 microns, so the focal length requirements of 500 mm or more. Even at F / 2 this means that the lens diameter should be above 250 mm. For a wavelength of 10 microns, the diffraction limit itself requires a lens diameter of at least 200 mm. As part of the development plan for Philippe’s thermoelectric phototransistor <1>, we also studied possible optical systems. We have found that there is currently no suitable lens for the pyroelectric photoconductor for long-distance observation. Photoelectric thermography