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Electro-optical information recording and reproduction system

  • US 4,511,930 A
  • Filed: 08/03/1983
  • Issued: 04/16/1985
  • Est. Priority Date: 04/24/1981
  • Status: Expired due to Fees
First Claim
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1. A system for recording and reproducing video information comprising in combination:

  • a record member,first means operable to generate video picture signals each of which signals defines at least one full frame of video information,first control means for controlling said first means to generate frame video picture signals,second means including a writing radiation beam generating means operable for generating and controllably directing a narrow beam of recording radiation of sufficient intensity to effect a recording in said record member by varying the physical structure of portions of said record member intersected by said beam and means for receiving a frame video picture signal from said first means and modulating said radiation beam in accordance with the characteristics of the picture signal generated to permit said beam to record the picture information in said record member by varying the structure of said portions intersected by said beam,third means operatively located with respect to said second means for prepositioning a record member containing a plurality of parallel record tracks with respect to said second means to permit said second means to record frame video signal information along selected record tracks of said record member,fourth means for effecting lateral relative positioning of a record member and said second means to dispose the scanning axis of said narrow beam of radiation in alignment with a selected narrow track of said record member,fifth means for effecting relative movement between said record member and said beam of radiation to cause said beam to scan said selected track,sixth means for activating said first control means to cause said first means to generate an output signal representative of the information contained in the field scanned when said fourth means is operated to effect the relative positioning of said scanning axis of said beam of recording radiation with a selected track of said record member wherein the video signal generated is employed to modulate said beam as it scans said selected track and said beam records the information defined by said signal output by said first means along an area of the selected track of the card which area is no wider than the width of said narrow beam scanning said selected track,seventh means including means for generating a beam of reading radiation for reading information recorded by said means and generating information signals defining the video information read by said reading radiation,eighth means for controlling the operation of said third, fourth and fifth means to cause said record member and said reading radiation beam to effect controlled relative movement whereby said reading radiation beam scans selected information recorded on said record member by said recording radiation beam, andmeans for receiving and transducing the information signals generated by said seventh means to a visually monitorable form.

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