Optical reflecting device

Claim 1

IN AN OPTICAL DEVICE FOR REFLECTING RAYS FROM IMAGES IN A LIMITED FIELD AND FOR REFRACTION OF SAID RAYS, THE COMBINATION OF A REFLECTING ELEMENT HAVING A REFLECTING SURFACE, AND A TRANSPARENT REFRACTING ELEMENT POSITIONED TO TRANSMIT SAID RAYS DIRECTED TO AND REFLECTED BY SAID REFLECTING SURFACE, SAID REFRACTING ELEMENT HAVING FACES WHICH ARE TRAVERSED BY SAID RAYS AND WHICH PARTIALLY REFLECT SAID RAYS FROM SAID FIELD ON ENTERING AND ON EMERGING FROM SAID ELEMENT, SAID REFRACTING ELEMENT VARYING IN THICKNESS BETWEEN SAID FACES SO THAT THE RAYS FROM SAID IMAGES REFLECTED BY SAID REFLECTING SURFACE ARE ALTERED BY REFRACTION ON TRANSMISSION OF SAID RAYS THROUGH SAID REFRACTING ELEMENT BOTH TO AND FROM SAID REFLECTING SURFACE AND CERTAIN OF SAID RAYS TRAVELING TOWARD SAID REFLECTING SURFACE ARE PARTIALLY REFLECTED ON ENTERING SAID ELEMENT IN THE SAME DIRECTION AS CERTAIN OF SAID RAYS TRAVELING TOWARD SAID REFLECTING SURFACE ARE REFLECTED ON EMERGING FROM SAID BODY, SAID REFRACTING ELEMENT BEING POSITIONED WITH ITS FACES SO ANGULARLY RELATED TO SAID REFLECTING SURFACE THAT SAID RAYS FROM IMAGES IN SAID FIELD REFLECTED BY ITS SAID FACES ARE DEVIATED FROM THE PATH OF THE RAYS REFLECTED BY SAID REFLECTING SURFACE, WHEREBY THE SPURIOUS IMAGES FORMED BY REFLECTIONS FROM SAID FACES OF SAID REFRACTING ELEMENT WILL BE SPACED FROM THE FIELD OF IMAGES REFLECTED BY SAID REFLECTING SURFACE, SAID REFRACTING MEMBER BEING ANGULARLY ADJUSTABLE TO VARY THE ANGULAR RELATION OF SAID FACES OF SAID REFRACTING MEMBER WITH RESPECT TO SAID REFLECTING SURFACE, SO THAT THE ANGLE BETWEEN THE PATHS OF THE RAYS REFLECTED FROM SAID FACES OF SAID REFRACTING MEMBER AND THE PATH OF THE RAYS FROM SAID REFLECTING SURFACE MAY BE ALTERED TO VARY THE SPACING OF THE SPURIOUS IMAGES FROM THE FIELD OF IMAGES REFLECTED BY SAID REFLECTING SURFACE.