Image receiving and image transmitting fiber optics cathode ray tube for facsimile transceiver

Claim 1

An image receiving and image transmitting fiber optics cathode ray tube for a facsimile transreceiver comprising: a funnel-shaped tube including a cone portion and neck portion extending therefrom; a face plate sealed at an end of said cone portion of said tube, said face plate having a layer of fluorescent material on the inner surface thereof; image receiving means including a slender elongated image receiving glass fiber plate which forms a portion of said face plate and which is adapted to be scanned in only one direction and to be contacted with a photosensitive sheet passing thereover, said glass fiber plate being comprised of a number of glass fibers densely arranged in the axial direction of the cathode ray tube; image transmission means including a slender elongated image transmission clear glass plate which forms a portion of said face plate and which is adapted to be scanned in only one direction, and an optical system facing said clear glass plate for focussing on an original sheet a light spot from said fluorescent layer which is on the inner surface of said clear glass plate, said glass fiber plate and said clear glass plate being juxtaposed with an outer surface of said glass fiber plate lying in a plane more remote from said end of said cone portion than an outer surface of said clear glass plate so that when said photosensitive sheet is passed over said face plate, said clear glass plate is protected from direct contact therewith; a supporting glass plate forming a portion of said face plate and being juxtaposed to said glass fiber plate, said glass fiber plate being interposed between said clear glass plate and said supporting glass plate; said fluorescent layer being at least coextensive with said image receiving glass fiber plate and said image transmission clear glass plate; and said image receiving means and image transmission means further including an electron gun unit disposed within said neck portion, opposed to said fluorescent layer, and emitting an electron beam to selectively scan the glass fiber plate during image receiving and the clear glass plate during image transmission.