Full circumferential viewing system

• US 3,203,328 A
• Filed: 02/21/1963
• Issued: 08/31/1965
• Est. Priority Date: 02/21/1963
• Status: Expired due to Term

• Current Assignee: Harry P. Brueggemann
• Original Assignee: Harry P. Brueggemann
• Inventors: Brueggemann, Harry P.
• Application Number:
  US04/260,250
• Time in Patent Office: 922 Days
• US Class Current: 396/21
• CPC Class Codes: G02B 13/06 Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
• CPC Class Codes: G02B 19/0023 at least one surface having optical power
• CPC Class Codes: G02B 19/0038 for use with ambient light G02B19/009, G02B19/0095 take precedence
• CPC Class Codes: G02B 23/08 Periscopes arrangements on floating structures of underwater viewing devices B63C11/49; arrangement of visual watch equipment on submarines B63G8/38

Claims

1. A FULL CIRCUMFERENTIAL VIEWING SYSTEM FOR PRODUCING AN IMAGE OF A 360* FIELD OF VIEW COMPRISING:

A HYPERBOLIC MIRROR HAVING A CONVEX SPECULAR SURFACE LOCATED AT A POSITION SUCH AS TO PERMIT RAYS FROM A SURROUNDING SCENE TO FALL THEREON;

A SUBSTANTIALLY SPHERICAL MIRROR HAVING ITS CENTER OF CURVATURE SUBSTANTIALLY COINCIDENT WITH THE CONJUGATE FOCUS OF SAID HYPERBOLIC MIRROR, THE CONCAVE SIDE OF SAID SPHERICAL MIRROR BEING SPECULAR WHEREBY SAID IMAGE OF SAID SCENE COMPRISES A REAL IMAGE