Stokowski S E
Appl Opt. 1976 Jul 1;15(7):1767-74. doi: 10.1364/AO.15.001767.
The performance characteristics, such as responsivity and spatial resolution, of pyroelectric devices, are calculated by employing a two-dimensional thermal modulation transfer function. The thermal analysis is done for the use of a freely suspended wafer of pyroelectric material, a situation encountered in monolithic detector arrays and pyroelectric vidicon targets. Measurements of the frequency dependence of the voltage responsivity and thermal crosstalk from detector elements, fabricated on LiTaO(3) wafers, are found to be in excellent agreement with the theoretical calculations. It is concluded that for linearly scanned arrays, a minimum scanning velocity, nu(min) = (2pikappa)/a, where kappa is the material diffusivity and 2a the dimension of square array element, is desirable for good resolution in the scanning direction and acceptable levels of crosstalk between elements. The analysis also indicates that operation of pyroelectric vidicons in the chopping mode rather than the panning mode provides for better image quality.
热释电器件的性能特性，如响应度和空间分辨率，是通过使用二维热调制传递函数来计算的。针对热释电材料自由悬浮晶片的使用情况进行了热分析，这种情况在单片探测器阵列和热释电视像管靶中会遇到。在钽酸锂（LiTaO₃）晶片上制造的探测器元件的电压响应度和热串扰的频率依赖性测量结果与理论计算结果非常吻合。得出的结论是，对于线性扫描阵列，为了在扫描方向上获得良好的分辨率以及元件之间可接受的串扰水平，最小扫描速度ν(min) = (2πκ)/a是理想的，其中κ是材料扩散率，2a是方形阵列元件的尺寸。分析还表明，热释电视像管在斩波模式而非平移模式下工作可提供更好的图像质量。
