Infinity image visual display system

• US 4,383,740 A
• Filed: 10/31/1980
• Issued: 05/17/1983
• Est. Priority Date: 10/31/1980
• Status: Expired due to Term

• Current Assignee: Rediffusion Simulation Incorporated
• Original Assignee: Rediffusion Simulation Incorporated
• Inventors: Bordovsky, Robert
• Primary Examiner(s): Henry, Jon W.
• Application Number:
  US06/202,682
• Time in Patent Office: 928 Days
• Field of Search: 350/294, 350/291, 350/174, 350/55, 350/27, 358/104, 358/238, 358/239, 358/250, 434/43, 434/44
• US Class Current: 359/631
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence

Abstract

An infinity image visual display system comprising an input image source, a concave projection mirror, a concave eyepiece mirror and a single path-folding beamsplitter. The projection mirror images the input image source at the focal surface of the eyepiece mirror, which image is reflected by the eyepiece mirror and focused at infinity.

Claims

1. An infinty image visual display system including an image source,

an eyepiece mirror disposed remote from said image source for focussing a transmitted image of said image source located at its focal surface at infinity,

means for transmitting said image of said image source from said image source to said focal surface of said eyepiece mirror along a folded, optically offset and non-orthometric path,

a concave compound curved projection mirror selectively positioned in axially offset, non-orthometric relation to said image source to receive and reflect an image of said image source toward the focal surface of said eyepiece mirror,

only one path-folding beamsplitter disposed in the light path between said visual image source and said eyepeice mirror for cooperatively defining, in association with said selectively positioned projection mirror and image source, said optically offset and non-orthometrically folded image transfer path intermediate said image source and said eyepiece mirror.

2. An infinity image visual display system according to claim 1 further including a fold mirror disposed in the light path intermediate said projection mirror and said eyepiece mirror.

3. An infinity image visual display system according to claim 1 further including a positive field lens located adjacent to said visual image source and disposed in the light path between said visual image source and said projection mirror.

4. An infinity image visual display system according to claim 1 wherein said projection mirror is spherical and wherein said eyepiece mirror is spherical.

5. An infinity image visual display system including a visual image source, a concave ellipsoidal projection mirror, a single path-folding beamsplitter, and a concave spherical eyepiece mirror, said projection mirror having the foci thereof located at the visual image source and operative to image the latter at the focal surface of said eyepiece mirror, said eyepiece mirror reflecting the image and focusing the image at infinity, said path-folding beamsplitter disposed in the light path between said visual image source and said eyepiece mirror.

6. An infinity image visual display system including

a visual image source,

a concave projection mirror,

a concave eyepiece mirror having a focal surface,

said projection mirror positioned to image the visual image source at the focal surface of said eyepiece mirror,

said eyepiece mirror reflecting the image and focussing the image at infinity,

only one path-folding beamsplitter disposed in the light path between said visual image source and said eyepiece mirror and

a fold mirror disposed in the light path generally midway between said projection mirror and said eyepiece mirror.