Image reproduction systmes

Claim 1

IMAGE REPRODUCTION APPARATUS COMPRISING MEANS FOR HOLDING A TRANSPARENCY TO BE REPRODUCED SUBSTANTIALLY IN CONTACT WITH A LIGHT-SENSITIVE SHEET WHICH IS ALSO LIGHTTRANSMITTING, TWO LIGHT SOURCES, A FIRST ADAPTED TO EMIT RADIATION OF A KIND TO WHICH THE LIGHT-SENSITIVE SHEET IS INSENSITIVE AND THE SECOND ADAPTED TO EMIT RADIATION OF A KIND TO WHICH SAID SHEET IS SENSITIVE, MEANS WHEREBY NARROW BEAMS OF LIGHT FROM SAID TWO LIGHT SOURCES ARE PROJECTED ON TO THE TRANSPARENCY TO BE CORRECTED TO FORM LIGHT SPOTS ON SAID TRANSPARENCY, MEANS FOR SCANNING SAID LIGTH SPOTS OVER THE SURFACE OF SAID TRANSPARENCY SO THAT SAID LIGHT-SENSITIVE SHEET IS EXPOSED BY THE LIGHT FROM SAID SECOND SOURCE WHICH PASSES THROUGH THE TRANSPARENCY, A COLOR FILTER BEHIND THE LIGHT-SENSITIVE SHEET ADAPTED TO PASS RADIATION FROM SAID FIRST SOURCE BUT TO BLOCK RADIATION FROM SAID SECOND SOURCE, A PHOTOELECTRIC DEVICE ARRANGED TO RECEIVE THE LIGHT WHICH PASSES THROUGH SAID FILTER, A CORRECTION COMPUTER RECEIVING THE OUTPUT OF SAID PHOTOELECTRIC DEVICE AND PROVIDING AN OUTPUT SIGNAL REPRESENTING THE CORRECTION REQUIRED IN ORDER TO EXPOSED THE LIGHT-SENSITIVE SHEET WITH THE DESIRED CORRECTED VALUES, AND MEANS MODULATING THE LIGHT FROM SAID SECOND SOURCE IN ACCORDANCE WITH THE CORRECTION SIGNAL FROM THE COMPUTER, WHEREBY SAID LIGHT-SENSITIVE SHEET IS EXPOSED BY LIGHT FROM SAID SECOND SOURCE IN ACCORDANCE WITH THE TRANSMITTANCE VALUES OF THE UNCORRECTED TRANSPARENCY, CORRECTED BY THE MODULATION OF SAID SECOND LIGHT SOURCE.