Showing papers on "Image sensor published in 1968"
Patent•
25 Nov 1968TL;DR: In this article, an image sensor of the type intended for conversion of an optical image into a series of electrical signals each of which represents in its magnitude the intensity of the picture element at a predetermined location of a sensor of a picture element on which an electron beam is impinging.
Abstract: There is disclosed an image sensor of the type intended for conversion of an optical image into a series of electrical signals each of which represents in its magnitude the intensity of the picture element at a predetermined location of a sensor of a picture element on which an electron beam is impinging. The beam, of course, is scanned so as to sequentially impinge on a plurality of such sensors arranged in a pattern so that the raster or scan of the entire pattern generates a series of electrical signals representative of the entire picture.
16 citations
TL;DR: A high sensitivity satellite-borne television camera has been developed to measure such faint light sources as auroras, and the sensitivity of the camera has sensitivity comparable with the dark-adapted human eye.
Abstract: A high sensitivity satellite-borne television camera has been developed to measure such faint light sources as auroras. A secondary electron conduction (SEC) television camera tube is used as the image sensor. In the present application for the Rice/NASA satellites code-named Owls, the tube is exposed by the application of a high voltage pulse of 0.1 sec or 0.2 sec duration. The picture is scanned for about 19 sec, and the video is digitized in synchronism with the satellite PCM system. The television data are then telemetered to the ground either real time or stored in one of the tape recorders. The optical system super-imposes star images on the picture for azimuthal aspect reference. The sensitivity of the slow scan camera was measured; it agrees with the sensitivity of a camera scanning at normal scan rate. Comparison was made of the relative sensitivity of the camera at the wavelength of the three most important auroral components. The camera has sensitivity comparable with the dark-adapted human eye. The weight of the system is 3.9 kg, and the power dissipation is 3.9 W.
7 citations
01 Dec 1968
TL;DR: In considering applications of satellite sensors to exploitation of earth resources, it becomes apparent that imagery from a variety of sensors will be required to accommodate the various disciplines and the environmental constraints.
Abstract: In considering applications of satellite sensors to exploitation of earth resources, it becomes apparent that imagery from a variety of sensors will be required to accommodate the various disciplines and the environmental constraints. To attempt crop surveys, for example, it appears that both the visual and the infrared spectrum will be utilized. This may be augmented by radar information to assist in defining water boundaries, regions, land with high water content, or to permit penetration over areas of continuous or seasonal cloud cover. One immediately becomes concerned by the lack of commonality in the data acquired by these sensors. The infrared imagery may be obtained by utilizing an optical line scanner with 20-30 channels covering the 0.3µ to 30µ band. The photographic imagery might be obtained by a panchromatic camera with 20-50 lines/mm resolution. The radar data could be provided by a side looking radar with several hundred foot resolution. The registration and resolution compatibility problems appear insurmountable, if one wishes to simultaneously utilize all the imagery to achieve the data classification. However, examining this in the light of information extraction as opposed to data processing one sees an immediate reconciliation. A specific sensor can be used as a primary sensor in establishing an initial categorization. Upon command the other sensory data can then be interrogated to provide supporting or verifying information.
1 citations