Panoramic optics assembly having an initial flat reflective element

• US 5,841,589 A
• Filed: 09/26/1995
• Issued: 11/24/1998
• Est. Priority Date: 09/26/1995
• Status: Expired due to Term

• Current Assignee: Rockwell International Corporation
• Original Assignee: Boeing North American Incorporated (The Boeing Co.)
• Inventors: Todd, Marion N., Ruda, Mitchell, Davis, John E., Stuhlinger, Tilman W., Castle, Kenneth R.
• Primary Examiner(s): NGUYEN, THONG Q
• Application Number:
  US08/533,801
• Time in Patent Office: 1,155 Days
• Field of Search: 359/363, 359/399-403, 359/405-406, 359/429-430, 359/725-726, 359/732, 359/715, 250/332, 250/334, 250/352-353
• US Class Current: 359/726
• CPC Class Codes: G02B 13/06 Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces

Abstract

An optics assembly for observing a panoramic scene comprises a plurality of optical elements. A flat reflective element redirects light from a panoramic scene. A plurality of refractive elements, successively receive the redirected light from the reflective element and create a real pupil. An optical relay system receives light from a last of the plurality of refractive elements. The optical relay system establishes the focal length of the optics assembly, corrects optical aberrations produced at the real pupil, corrects field aberrations and produces an annular image on a flat focal plane assembly. The optics assembly produces a small F-number at field angles perpendicular to the optical axis of the optics assembly over a panoramic scene.

Claims

1. An optics assembly for observing a panoramic scene, comprising:

a plurality of optical elements, comprising;

a flat reflective element for re-directing light from a panoramic scene;

a plurality of refractive elements for successively receiving said redirected light from said reflective element and creating a real pupil;

an optical relay system for receiving light from a last said plurality of refractive elements and producing an annular image on a flat focal plane assembly;

wherein said optics assembly produces a flat image for field angles from said light from said panoramic scene at near perpendicular angles to an optical axis of the optics assembly.

2. The optics assembly of claim 1, wherein said optical relay system, comprises:

a beam splitter positioned to receive light from said last of said plurality of refractive elements;

a first portion of said received light being reflected and directed through a first re-imaging optical group and onto a first flat focal plane subassembly of said flat focal plane assembly; and

a second portion of said received light being transmitted and directed through a second re-imaging optical group and onto a second flat focal plane subassembly of said flat focal plane assembly,

said first and second flat focal plane subassemblies being clocked with respect to each other so as to allow focal planes of each respective plane subassembly to be optically abutted.