Panoramic view objective using an aspherical lens

Abstract

Abstract A PANORAMIC VIEW OBJECTIVE COMPRISED OF A COMPOUND LENS ARRANGEMENT IN A LENS HOUSING WITH AN ASPHERICAL LENS PROVIDING THE ENTRANCE SURFACE FOR LIGHT RAYS INTO THE OBJECTIVE. THE ASPHERICAL SURFACE OF THE LENS IN DIVIDED INTO AN OUTER PORTION DIVERGING FROM THE APEX OF THE LENS AND AN INNER PORTION LOCATED ADJACENT THE OUTER PORTION. RAYS ARE REFRACTED BY THE OUTER PORTION INTO THE LENS AND ARE TOTALLY REFLECTED BY THE INNER SURFACE OF THE INNER PORTION AND ARE ORIENTED TO PASS THROUGH THE LENS HOUSING. WITHIN THE HOUSING AN ACHROMATIC ADJUSTING LENS IS POSITIONED ADJACENT THE SURFACE OF THE ASPHERICAL LENS AND AN INTERMEDIATE IMAGE PLANE IS DISPOSED WITHIN THE HOUSING BETWEEN THE ACHROMATIC ADJUSTING LENS AND AN ADJACENT FIELD LENS. THE FIELD LENS HAS A FOCAL LENGTH GREATER THAN THE DISTANCE BETWEEN IT AND THE IMAGE PLANE. ADJACENT THE FIELD LENS ON THE OPPOSITE SIDE FROM THE INTERMEDIATE IMAGE PLANE IS A PLATE MEMBER HAVING CONICALLY-SHAPED SPACED PARALLEL FACES FOR ORIENTING THE RAYS IN A PARALLEL ARRANGEMENT AND DIRECTING THEM TOWARD THE OPTICAL AXIS OF THE LENS HOUSING. REARWARDLY OF THE PARALLEL PLATE AN ASYMMETRICAL ARRANGEMENT OF LENSES IN COMBINATION WITH AN APERTURE ARE PROVIDED FOR COLLECTING AND PRODUCING THE IMAGE IN AN IMAGE PLANE ADJACENT THE REARWARD END OF THE LENS HOUSING.

Inventors

• 👤 Heinz Brachvogel

Bibliographic Details