Photoelectric detection device utilizing randomized fiber optical light conducting means

Claim 1

A DEVICE OF THE CHARACTER DESCRIBED COMPRISING THE COMBINATION OF AT LEAST TWO PHOTOSENSITIVE ELEMENTS, ONE ELEMENT BEING PREDOMINANTLY RESPONSIVE TO A PREDETERMINED BAND OF FREQUENCIES OF THE LIGHT SPECTRUM AND THE OTHER ELEMENT BEING PREDOMINANTLY SIMILARLY RESPONSIVE TO A SUBSTANTIALLY DIFFERENT BAND OF LIGHT FREQUENCIES AND OPPOSITELY RESPONSIVE TO SAID PREDETERMINED BAND OF FREQUENCIES, MEANS CONNECTING SAID ELEMENTS IN SERIES AND WITH A COMMON JUNCTION IN A CURRENT CARRYING CIRCUIT, ELECTRICAL DISCRIMINATING MEANS RESPONSIVE TO CHARACTERISTIC CHANGES IN VOLTAGE CONNECTED TO SAID COMMON JUNCTION AND TO ONE OF SAID ELEMENTS IN SUCH MANNER AS TO PLACE SAID DISCRIMINATING MEANS ELECTRICALLY IN PARALLEL RELATION WITH SAID ONE OF SAID ELEMENTS, AND A SINGLE FIBER OPTICAL LIGHT-CONDUCTIVE MEMBER EMBODYING A PLURALITY OF ELONGATED RELATIVELY THIN AND FLEXIBLE LIGHT-CONDUCTING FIBERS EACH HAVING A LIGHT-TRANSMITTING CORE AND A LIGHTINSULATING CLADDING, SAID FIBERS BEING GROUPED IN RELATIVELY INTIMATE SIDE-BY-SIDE INTERWINED RELATION THROUGHOUT THEIR LENGTH TO FORM, BY THE COMPOSITE RELATIONSHIP OF THEIR RESPECTIVE OPPOSITE ENDS, A LIGHT-RECEIVING FACE AT ONE END OF SAID MEMBER HAVING A DIFFERENT GEOMETRICAL PATTERNING OF ITS FIBER ENDS THAN THAT OF A LIGHT-EMITTING FACE AT THE OTHER END OF SAID MEMBER SO THAT SAID MEMBER IS ADAPTED TO RECEIVE LIGHT IMPINGING UPON VARIOUS PARTS OF SAID LIGHT-RECEIVING FACE WITH ANY DEGREE OF INTENSITY AND TO EMIT SAID LIGHT FROM SAID LIGHT-EMITTING FACE WITH A UNIFORM AVERAGE INTENSITY OVER ALL PARTS OF SAID LIGHT-EMITTING FACE, MEANS FOR SUPPORTING SAID LIGHTRECEIVING FACE ADJACENT A SINGL REMOTE AREA TO BE UNDER SURVEILLANCE BY SAID DEVICE FOR RECEIVING LIGHT FROM SAID AREA, MEANS FOR SUPPORTING SAID LIGHT-EMITTING END FACE OF SAID LIGHT-CONDUCTING MEMBER AND SAID PHOTOSENSITIVE ELEMENTS IN ADJACENT FACING RELATION WITH EACH OTHER WITH SAID ELEMENTS BEING LATERALLY ADJUSTABLE RELATIVE TO SAID LIGHT-EMITTING FACE OF SAID LIGHT-CONDUCTING MEMBER FOR SELECTING THE RATIO OF AMOUNTS OF LIGHT FROM SAID AREA WHICH CAN IMPINGE UPON RESPECTIVE ELEMENTS, AND MEANS FOR SHIELDING SAID PHOTOSENSITIVE ELEMENTS FROM EXTRANEOUS LIGHT.