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公开(公告)号：JPH02291927A
公开(公告)日：1990-12-03
申请号：JP11211689
申请日：1989-05-02
Applicant: NAT SPACE DEV AGENCY
Inventor： FUKUDA MINORU , ICHIKAWA SHINICHIRO
Abstract: PURPOSE:To make it possible to block only the passage of harmful electro-magnetic waves effectively without decreasing the transmittance for an incident light signal by providing a shield plate having an opening part whose size is smaller than the specified ratio of the wavelength of an electromagnetic wave whose transmission should be blocked. CONSTITUTION:A sensor has the following parts: a shield plate 3 which is arranged in an optical-sensor main body 1 and has an opening 4 whose size is about 1/2 or less of the wave length of an electromagnetic wave whose transmission should be blocked; and an optical system which condenses a light signal inputted from an opening part 4 of the sensor main body to the size of the opening of the shield plate 3 and passes the signal through the opening 4. An incident light signal 6 is condensed through an objective lens 2 and reaches a detecting and processing part 5 through the opening 4 of the shield plate 3 without attenuation. The electromagnetic wave which is intruded through the opening 4 of the sensor main body is drastically attenuated when the electromagnetic wave passes through the opening 4 of the shield plate which is set at the value that is about 1/2 or less of the wavelength of the electro magnetic wave. The reaching of the electromagnetic wave to the detecting and protecting part 5 in the sensor main body 1 is effectively blocked. Thus, interference on the detecting and processing part 5 is prevented.
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公开(公告)号：JPH0529050B2
公开(公告)日：1993-04-28
申请号：JP19809986
申请日：1986-08-26
Applicant: NAT SPACE DEV AGENCY
Inventor： FUKUDA MINORU , MORYAMA TAKASHI
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公开(公告)号：JPS6355423A
公开(公告)日：1988-03-09
申请号：JP19809986
申请日：1986-08-26
Applicant: NAT SPACE DEV AGENCY
Inventor： FUKUDA MINORU , MORIYAMA TAKASHI
Abstract: PURPOSE:To obtain a high resolution sensor having a high performance by adding a simple means, by providing an instantaneous visual field correcting means on an image pickup element, so that conversion of an instantaneous visual field to the image pickup element, which follows up a movement of a flying object is not generated. CONSTITUTION:In a period in which a unit picture element of an image pickup element 1 is executing an image pickup of a visual field A, namely, until the time immediately before a time point t0+(a) from a time point t0, even if the element 1 moves by an instantaneous visual field correcting optical system 2, an instantaneous visual field to its unit picture element is not converted. Also, it is held as its visual field A, and in a signal read-out period to the time point t0+(a), image information of the visual field A is outputted. Simultaneously, the instantaneous visual field to the unit picture element is converted stepwise to a visual field B, and enters into the next image pickup period from the time point t0+(a). Also, in the same way as a first period, in the image pickup period extending from the time point t0+(a) to the time point t0+2a, the instantaneous visual field is held as t he visual field B, and in a signal read-out field B is outputted. Thereafter, in the same way, the image pickup can be executed continuously.
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