Line-scan television system employing spectrum analysis
阅读：579发布：2022-10-25
专利汇可以提供Line-scan television system employing spectrum analysis专利检索，专利查询，专利分析的服务。并且A line-scan television system adapted to be mounted aboard a satellite or similar vehicle for televising an object, such as the Earth or some other heavenly body, as the satellite orbits. A lens system views an elongated image swath perpendicular to the sub-orbital track and produces an elongated slit of light which, in turn, is divided into parallel image segments by suitable fiber optics. A plurality of prisms then spectrally disperse each of the image segments onto the photosensitive input surface of a suitable camera tube, such as an image dissector. This input image raster is then electronically scanned to generate corresponding output video information which is transmitted to a ground receiving station for image reproduction purposes. Scan control circuitry associated with the camera tube enables the spectrally dispersed image segments to be scanned to provide either a variable contrast control for black and white reception, as selected by a remote command signal, or to permit full-color television reception. The picture reproduction equipment at the ground station is time synchronized with the scanning of the spectrally dispersed input image segments at the camera tube.，下面是Line-scan television system employing spectrum analysis专利的具体信息内容。
1. In a line-scan television system including a camera tube means for televising an object during relative movement between said object and said camera tube means, the combination comprising, a photosensitive image input surface on said camera tube means, a lens system for viewing an elongated swath on the surface of the object being televised extending perpendicular to the direction of said relative movement and converting said elongated swath into a narrow slit of image input light for said camera tube means, means interposed between said lens system and said camera tube for spectrally dispersing said slit of light transversely to its length and applying it as an input image to said photosensitive image input surface, said input image having a width corresponding to the dimension of one resolution element of said camera tube and having a length corresponding to a plurality of side-by-side resolution elements, and circuit means operably connected to said camera tube means for controllably scanning the width of said spectrally dispersed input image repeatedly, once for each resolution element contained within the length of said spectrally dispersed input image to produce a video output signal indicative of substantially the total spectral content within each resolution element of said input image.
2. The combination specified in claim 1 wherein said camera tube is an image dissector equipped with horizontal and vertical deflection means, said input image is spectrally dispersed vertically and applied to the photosensitive image input surface of said camera tube, and said scanning circuit means comprises, a source for generating clock pulses at a predetermined frequency, first deflection voltage producing means operably connected to said clock pulse source for generating a staircase voltage signal and applying it to the horizontal deflection means of said image dissector, said staircase voltage signal containing a voltage step for each resolution element along the length of said input image effective to sequentially scan horizontally each resolution element contained in the length of said input image, and second deflection voltage producing means operably connected to said clock pulse source for producing a series of sawtooth voltage signals and applying it to the vertical deflection means of said image dissector, said series of sawtooth voltage signals including one sawtooth voltage signal for each resolution element contained in the length of said input image effective to vertically scan the spectral content of said spectrally dispersed input image for each resolution element contained in the length of said input image.
3. The combination specified in claim 1 further including image reconstructing means responsive to said video output signal for reconstructing a colored visual display of said input image.
4. The combination specified in claim 3 wherein said means for reconstructing said colored display comprises, a photosensitive film, a multicolored rotary disc filter rotated in syncchronism with the rate of Scanning said spectrally dispersed image at said camera tube, light source means for directing light through said multicolored disc filter onto said film, means responsive to said video output signal for varying the output light intensity of said light source, and means for causing relative movement between said film and said light source in synchronism with the rate of scanning said spectrally dispersed image at said camera tube.
5. The combination specified in claim 2 further including, means receptive to the slit of light from said lens system for dividing said slit of light along its length into parallel light segments, said spectral dispersing means being effective to spectrally disperse each of said light segments and apply them to the photosensitive image input surface of said camera tube in the form of a raster of image segments, first counter means operably connected to said clock pulse source for registering a digital count of said clock pulses, said first deflection voltage producing means being operably connected to said first counter means for converting said digital count into a series of first staircase voltage signals and applying them to the horizontal deflection means of said image dissector, each of said first staircase voltage signals including a number of voltage steps corresponding to the number of resolution elements represented by the length of each spectrally dispersed image segment, means operably connected to said clock pulse source for dividing said clock frequency by the number of voltage steps contained in each of said first staircase voltage signals to produce a scaled-down pulse series, second counter means operably connected to said dividing means for registering a digital count of said scaled-down pulses, and means operably connected to said second counter means for converting said scaled-down pulse count into a second staircase voltage signal and applying it to the vertical deflection means of said image dissector, said second staircase voltage signal containing a number of voltage steps corresponding to the number of image segments in said image raster, said second deflection voltage producing means being connected to superimpose a series of sawtooth voltage signals on each voltage step of said second staircase voltage signal for vertically scanning the spectral content of each resolution element contained in the length of each image segment.
6. In a line-scan television system including a camera tube means for televising an object during relative movement between said object and said camera tube means, the combination comprising, a photosensitive image input surface on said camera tube means, said camera tube means having a resolution element of predetermized size, a lens system for viewing an elongated swath on the surface of the object being televised extending perpendicular to the direction of said relative movement and converting said elongated swath into a narrow slit of image input light for said camera tube means, means receptive to the slit of light from said lens system for dividing said slit of light along its length into parallel light segments, means receptive to said parallel light segments for spectrally dispersing said light segments onto said photosensitive image input surface in the form of a raster of image segments, and circuit means operably connected to said camera tube means for controllably scanning said spectrally dispersed input image segments to produce a proportionate video output signal, said scanning circuit means including, means for applying a horizontal scanning signal to said camera tube means effective to successively cause said video output signal to be proportionate to adjacent portions of each of said spectrally dispersed input image segments. said adjacent portions of each of said input image segments extending along the length of said input image segments and each adjacent portion being the width of one resolution element, and means for applying a variable vertical scanning signal to said camera tube means effective to alter the vertical position in each of said spectrally dispersed input image segments at which said adjacent portions are located.
7. The combination specified in claim 6 wherein said camera tube means is an image dissector having a resolution element of predetermined size and being equipped with horizontal and vertical deflection means and said scanning circuit means comprises, a source for generating clock pulses at a predetermined frequency, first counter means operably connected to said clock pulse source for registering a digital count of said clock pulses, first deflection voltage producing means operably connected to said first counter means for converting said digital count into a series of first staircase voltage signals and applying them to the horizontal deflection means of said image dissector, each staircase voltage signal including a number of voltage steps corresponding to the number of resolution elements represented by the length of each spectrally dispersed image segment, means operably connected to said clock pulse source for dividing said clock frequency by the number of voltage steps contained in each staircase voltage signal to produce a scaled-down pulse series, second counter means operably connected to said dividing means for registering a digital count of said scaled-down pulses, second deflection voltage producing means operably connected to said second counter means for converting said scaled-down pulse count into a second staircase voltage signal and applying it to the vertical deflection means of said image dissector, said second staircase voltage signal containing a number of voltage steps corresponding to the number of image segments in said image raster, and control means operably connected to said second deflection voltage producing means for controlling said second staircase voltage signal in accordance with desired vertical scanning position relative to each spectrally dispersed image signal.
8. The combination specified in claim 7 wherein said control means for controlling said second staircase voltage signal comprises means for shifting the base level of said second staircase voltage signal
9. The combination specified in claim 8 wherein said shifting means are remotely controlled.
10. The combination specified in claim 7 wherein said control means for controlling said second staircase voltage signal comprises a sawtooth generator circuit operably connected to said clock pulse source and said second deflection voltage producing means for superimposing on said second staircase voltage signal a series of sawtooth pulses effective to vertically scan each resolution element contained within the length of each spectrally dispersed image segment and produce a video output signal which is proportionate to the spectral information associated with each resolution element in said spectrally dispersed image segments.
11. The combination specified in claim 10 further including, a transmitting means operably connected to receive the video output signal from said image dissector and the output of said clock pulse source for transmitting said video output signal and said clock pulse output to a distant location, said clock pulse output being utilized as a time synchronizing signal, receiving means at said distant location for receiving said transmitted video and synchronizing signals, a photosensitive film, a multicolored rotary disc filter, light source means for directing light through said rotary disc filter onto said film, means responsive to said received video signal for varying the output light intensity of said light source, and means responsive to said received synchronizing signal for rotating said rotary disc filter and for causing relative movement between said film and said light source in synchronism with the rate of scanning said spectrally dispersed image segments at said image dissector.
12. The line-scan television system specified in claim 6 wherein said camera tube means is mounted aboard a satellite and said object being viewed is a heavenly body about which said satellite is orbiting.
13. The combination specified in claim 6 wherein said spectral dispersing means comprises a plurality of prisms.
14. The combination specified in claim 6 wherein said camera tube means is an image dissector.
15. The combination specified in claim 6 wherein said light dividing means comprises fiber optic means.
16. The combination specified in claim 6 and further including, transmitting means operably connected to the output of said camera tube means for transmitting said proportionate video output signal to a distant station, means located at said distant location for receiving said transmitted video output signal, and means responsive to said received video signal for reconstructing a visual display of said input image in accordance with said received video signal.
17. The combination specified in claim 16 further including means for maintaining synchronization between the reconstruction of said visual display and the image scanning at said camera tube.
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