The performance of linear and area image sensors, which employ charge coupled device concept, has been greatly improved in the last few years. The linear image sensor has widely been used as practical devices in many systems such as facsimile transmitters and optical character readers. The area image sensor is now beginning of practical use. The device structure, operation method and performance of the linear and area sensors are described. Great many types of infra-red image sensor, which make

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... use of time delay and integration on the focal plane array, have recently been developed in monolithic and hybrid fashion by the aid of the charge coupled device technology. Recent progresses in this field are reviewed.