Panoramic zoom lens assembly

• US 4,429,957 A
• Filed: 07/30/1981
• Issued: 02/07/1984
• Est. Priority Date: 07/30/1981
• Status: Expired due to Fees

• Current Assignee: King-Bell Optics Incorporated
• Original Assignee: King-Bell Optics Incorporated
• Inventors: King, Don G.
• Primary Examiner(s): Corbin, John K.
• Assistant Examiner(s): Sugarman, Scott J.
• Application Number:
  US06/288,656
• Time in Patent Office: 922 Days
• Field of Search: 350/423, 350/441, 350/440, 350/445
• US Class Current: 359/676
• CPC Class Codes: G02B 13/06 Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
• CPC Class Codes: G02B 15/143 having three groups only
• CPC Class Codes: G02B 5/04 Prisms
• CPC Class Codes: G03B 37/06 involving anamorphosis G03B37/02, G03B37/04 take precedence

Abstract

A panoramic zoom lens assembly of the type including a reflector lens spaced from the image plane of an optical recording device such as a film camera or video camera is disclosed. The zoom lens assembly includes a cylindrical housing having a transparent sidewall portion and an opaque sidewall portion with a reflector mounted in optical communication with the transparent sidewall zone. The reflector is provided with a symmetrical, reflective surface of revolution the axis of which is transverse to the image plane. An annular, objective lens assembly is mounted within the housing in a fixed position surrounded by the opaque housing sidewall portion. An intermediate annular lens is mounted within the housing for reciprocal movement along the reflector axis between the objective lens and the image plane. Displacement of the movable annular lens varies the focal length of the overall lens assembly. In a preferred embodiment, a third annular lens is mounted in a fixed position between the movable annular lens and the image plane whereby the assembly can be mounted directly onto a camera housing.

Claims

1. A zoom lens assembly for focusing the image of a panoramic view onto an image plane comprising, in combination:

a cylindrical housing having a transparent sidewall zone and an opaque sidewall zone;

a reflector mounted in said housing in optical communication with the transparent sidewall zone, said reflector having a symmetrical, reflective surface of revolution the axis of which is transverse to the image plane;

a first annular lens mounted with said housing in a position surrounded by said opaque sidewall zone;

a guide tube received within said housing and extending along the axis of said reflector through said first annular lens;

a second annular lens received within said housing and movably mounted in concentric alignment with said first annular lens for reciprocal movement along said guide tube between the first annular lens and the image plane; and

,

carriage means received within said housing and mounted for movement along said guide tube, said second annular lens being mounted onto said carriage means.