Pinhole detector optical system

Claim 1

IN A PINHOLE DETECTOR FOR DETECTING HOLES IN A RAPIDLY MOVING CONTINUOUS SHEET OF MATERIAL HAVING TWO MAJOR SURFACES, THE MEANS INCLUDING A LIGHT SOURCE, A PHOTOSENSITIVE ELEMENT, MEANS ACTUATED BY SAID PHOTOSENSITIVE ELEMENT FOR INDICATING THE PRESENCE OF A HOLE IN SAID SHEET OF MATERIAL, MEANS DEFINING A PATH BETWEEN SAID LIGHT SOURCE AND SAID PHOTOSENSITIVE ELEMENT FOR SAID RAPIDLY MOVING CONTINUOUS SHEET OF MATERIAL, SAID LIGHT SOURCE BEING DISPOSED ADJACENT TO AND ACROSS SAID PATH FOR DIRECTING LIGHT AGAINST ONE MAJOR SURFACE OF SAID SHEET OF MATERIAL, AND MEANS SHIELDING SAID PHOTOSENSITIVE ELEMENT FROM EXTRANEOUS LIGHT; THE MEANS COMPRISING A PLURALITY OF SEPARATE ELONGATED LIGHT CONDUCTORS EACH HAVING A FIRST END AND A SECOND END, SAID FIRST END INCLUDING AN END FACE DISPOSED ADJACENT TO AND IN SCANNING RELATIONSHIP TO THE OTHER MAJOR SURFACE OF SAID SHEET OF MATERIAL, SAID FIRST ENDS OF SAID PLURALITY OF LIGHT CONDUCTORS BEING IN SIDE-BY-SIDE RELATIONSHIP AND SAID END FACES THEREOF BEING ALIGNED WITH AND CONFRONTING SAID LIGHT SOURCE WHEREBY LIGHT FROM SAID LIGHT SOURCE IMPINGES UPON AT LEAST ONE OF SAID END FACES WHEN A HOLE IN SAID SHEET OF MATERIAL PASSES SAID LIGHT SOURCE, EACH OF THE SECOND ENDS OF SAID PLURALITY OF LIGHT CONDUCTORS HAVING AN END FACE DISPOSED TO DISCHARGE CONDUCTED LIGHT INTO SAID PHOTOSENSITIVE ELEMENT.