Combined display and viewing system

• US 5,515,070 A
• Filed: 01/13/1995
• Issued: 05/07/1996
• Est. Priority Date: 07/24/1992
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Kawada, Masakazu
• Primary Examiner(s): Hjerpe, Richard
• Assistant Examiner(s): CHANG, KENT WU
• Application Number:
  US08/372,698
• Time in Patent Office: 480 Days
• Field of Search: 345/4, 345/7, 345/8, 345/9, 359/13, 359/630, 359/631, 359/633, 354/219, 354/289.11, 354/289.12, 348/333, 348/341, 348/345
• US Class Current: 345/8
• CPC Class Codes: G02B 2027/0123 comprising devices increasing the field of view
• CPC Class Codes: G02B 2027/0127 comprising devices increasing the depth of field
• CPC Class Codes: G02B 2027/0138 comprising image capture systems, e.g. camera
• CPC Class Codes: G02B 2027/0143 the two eyes not being equipped with identical nor symmetrical optical devices
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 5/10 with curved faces

Abstract

A combined display and viewing system includes a display panel (6) and an optical subsystem (7,8) having at least one optical element (7) with a rear surface (7) which reflects the displayed information towards the eyes (E) of a user, wherein the focal length (f) of the subsystem satisfies the condition:

-0.0005≦(1/f)<0.0005 mm.sup.-1.

Claims

1. A combined display and viewing system characterized in that said combined display and viewing system comprises:

an information display panel that is substantially transparent for light radiation from a scene to be viewed, and arranged on a system optical axis of said display and viewing system;

an optical subsystem being substantially transparent for said light radiation and having a single optical axis defining the system optical axis, said optical subsystem comprising at least one element having a curved front surface facing the scene and a rear surface facing the display panel, said rear surface exclusively reflecting information displayed on said display panel towards an eye of a user, said at least one element having, for scene radiation, substantially zero lens power;

holding means for holding the display panel and the optical subsystem at a location before the eye of the user with said display panel being disposed between the eye and said optical subsystem,

wherein a distance between the rear surface of the element of the optical subsystem and the display panel is substantially equal to one-half of a radius of curvature of the rear surface, and wherein a focal length of the subsystem satisfies the condition;

space="preserve" listing-type="equation">-0.0005≦

(1/f)≦

0.0005 mm.sup.-1.

2. A combined display and viewing system as claimed in claim 1, characterized in that the optical subsystem comprises an additional optical element arranged between the rear surface of the first optical element and the display panel.