IMAGE SENSING AND PROCESSING BY A BACTERIORHODOPSIN-BASED ARTIFICIAL PHOTORECEPTOR
IMAGE SENSING AND PROCESSING BY A BACTERIORHODOPSIN-BASED ARTIFICIAL PHOTORECEPTOR
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DOI：
10.1364/ao.32.006371
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发表时间：
1993-11-01
期刊：
影响因子：
1.9
通讯作者：
KOYAMA, K
中科院分区：
文献类型：
--
作者：
MIYASAKA, T;KOYAMA, K
光学信息的传感和处理已经用独特的生物电子图像传感器进行，该生物电子图像传感器将细菌视紫红质（bR）固定为光敏视网膜蛋白。将含bR的紫色膜的薄膜涂覆在电极的二维像素阵列上，并制成与具有反电极的电解质凝胶层的结，以形成人工光感受器。来自每个像素的光电流信号显示出对光强度的差分响应，这是该液体结光电池的固有特性。由基于bR的人工感光器检测和处理的图像通过并行信号传输电路同时显示在发光二极管监视器面板上。实验表明，光感受器作为视网膜模型，能够选择性地检测真实的时间内的图像运动，并执行其边缘分量的矢量提取，类似于生物光感受器的视觉处理功能。
Sensing and processing of optical information have been conducted with a unique bioelectronic image sensor that immobilizes bacteriorhodopsin (bR) as a photosensitive retinal protein. A thin film of bR-containing purple membranes was coated on a two-dimensional pixel array of electrodes and was made into a junction with an electrolyte gel layer having a counterelectrode to form an artificial photoreceptor. Photocurrent signals from each pixel showed a differential responsivity to light intensity, intrinsic to this liquid-junction photocell. Images detected and processed by the bR-based artificial photoreceptor were simultaneously displayed on a light-emitting-diode monitor panel through parallel signal-transmission circuitry. The experiment revealed that the photoreceptor is, as a retina model, capable of selectively detecting motion of images in real time and of performing vectorial extraction of their edge components, similar to the visual processing function of biological photoreceptors.