Comparison of BaTiO3 optical novelty filter and photothermal lensing configurations in photothermal experiments.
Comparison of BaTiO3 optical novelty filter and photothermal lensing configurations in photothermal experiments.
复制标题
光热实验中 BaTiO3 光学新颖滤光片和光热透镜结构的比较。
DOI：
10.1021/ac00041a015
复制
发表时间：
1992
影响因子：
7.4
通讯作者：
Bialkowski,SE
中科院分区：
文献类型：
--
作者：
Kalaskar,SD;Bialkowski,SE
光折变BaTiO_3作为一种新奇滤波器，突出光热信号的高空间频率分量。记录在Ba-Ti_（03）中的实时相位光栅作为探测激光的匹配抑制空间滤波器。这减少了来自光信号的静止背景，从而增加了信号对比度。对单调平稳信号的剔除为改善光热信号提供了有力的手段。本文描述了这种新型装置的构造和所进行的实验，以便将其性能与光热透镜结果进行比较。本文提出了用BaT_（103）作为自适应空间频率滤波器对光热信号进行滤波的理论。比较光热透镜实验中获得的光信号和BaTIOj光学新奇滤波器实验中获得的光信号的结果。光学新奇滤波器信号在中等光热引起的相移的信号对比度方面表现出显著的改善。
Photorefractive BaTIOj Is used as an optical novelty filter to highlight the high spatial frequency components of the pho-tothermal signal. A real-time phase grating recorded In Ba-TI03 acts as a matched rejection spatial filter for the probe laser. This reduces the stationary background from the optical signals thereby Increasing signal contrast ratios. Rejection of the monotonous stationary signal provides a powerful means of Improving the photothermal signal. This paper describes the construction of this novel apparatus and the experiments performed In order to compare Its performance with photothermal lensing results. A theory that explains photothermal signal filtering with BaT103 as an adaptive spatial frequency filter Is presented. Results comparing the optical signals obtained In a photothermal lensing experiments and those obtained In the BaTIOj optical novelty filter experiments are presented. The optical novelty filter signals demonstrate a remarkable Improvement In the signal contrasts for moderate photothermaHnduced phase shifts.