Light sensitive digital aspect sensor

Claim 1

A BODY INCLUDING A SENSING DEVICE FOR PRODUCING A DIRECTION DIGITAL OUTPUT SIGNALS CORRESPONDING TO A SET OF DIGITS ADAPTED TO REPRESENT THE DIRECTION OF A LIGHT VECTOR EMANATING FROM A LIGHT SOURCE, SAID LIGHT SOURCE AND SAID BODY BEING RELATIVELY MOVABLE WITH RESPECT TO ONE ANOTHER, COMPRISING: LIGHT SENSITIVE DETECTION MEANS ON SAID BODY HAVING A DETECTOR ELEMENT CORRESPONDING TO EACH DIGIT OF SAID SET, EACH OF SAID DETECTOR ELEMENT HAVING AN ON STATE AND AN OFF STATE AND BEING IN ONE OF SAID STATES WHEN A PREDETERMINED AMOUNT OF LIGHT IMPINGES THEREON AND IN THE OTHER OF SAID STATES WHEN SAID PREDETERMINED AMOUNT OF LIGHT DOES NOT IMPINGE THEREON; A PERFORATE LIGHT MASK INTERPOSED BETWEEN SAID LIGHT SOURCE AND SAID DETECTION MEANS; SAID MASK HAVING A DIFFERENT PERFORATION PATTERN ADJACENT TO EACH DETECTOR ELEMENT, THE PERFORATION PATTERNS BEING ARRANGED RELATIVE TO EACVH OTHER TO FORM A UNIQUE PERFORATE CODE, EACH PERFORMATION PATTERN BEING OPERATIVE TO PERMIT SAID LIGHT VECTOR TO IMPINGE ON THE ADJACENT DETECTOR ELEMENT ONLY WHEN SAID LIGHT VECTOR EMANATES FROM SELECTED PREDETERMINED DIRECTIONS; WHEREBY THE GROUP OF OUTPUT SIGNALS FROM SAID DETECTOR ELEMENTS PROVIDES A CODED DIGITAL REPRESENTATION OF THE DIRECTION OF SAID LIGHT VECTOR.