Liquid-crystal active lens: a reconfigurable lens employing a phase modulator
Liquid-crystal active lens: a reconfigurable lens employing a phase modulator
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液晶有源透镜：采用相位调制器的可重构透镜
DOI：
10.1016/0030-4018(95)00657-5
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发表时间：
1996
影响因子：
2.4
通讯作者：
H. Ohzu
中科院分区：
文献类型：
--
作者：
Y. Takaki;H. Ohzu
所提出的有源透镜由附接到液晶二维相位调制器的透镜组成，并且它提供可变焦距和图像处理能力。由于透镜具有主折射光焦度，相位调制器提供小且可变的光焦度，因此该器件具有大且可变的光焦度和小的F数。它还可以在非相干成像系统中执行基于卷积的图像处理，因为它的强度点扩展函数可以通过改变调制器的相位分布来控制。一个原型装置改变其焦距从0.23米到0.28米和图像移位，图像分裂和匹配滤波操作进行了实验证明。
The proposed active lens consists of a lens attached to a liquid-crystal two-dimensional phase modulator and it provides both a variable focal length and image processing capability. Since the lens has main refractive power and the phase modulator provides a small and variable power, the device features a large and variable power and a small F number. It can also perform convolution-based image processing in an incoherent imaging system, since its intensity point-spread function can be controlled by changing the modulator's phase distribution. A prototype device varied its focal length from 0.23 m to 0.28 m and image-shifting, image-splitting and matched-filtering operations were experimentally demonstrated.