Twin-image binoculars

• US 5,416,633 A
• Filed: 10/29/1992
• Issued: 05/16/1995
• Est. Priority Date: 10/31/1991
• Status: Expired due to Term

• Current Assignee: Thomson-CSF
• Original Assignee: Thomson-CSF
• Inventors: Le Pesant, Jean-Pierre, Michel, Claude
• Primary Examiner(s): Look, Edward K.
• Assistant Examiner(s): VERDIER, CHRISTOPHER M
• Application Number:
  US07/968,206
• Time in Patent Office: 929 Days
• Field of Search: 359/409, 359/410, 359/630, 359/638, 359/48, 359/49, 359/50, 359/87, 359/600
• US Class Current: 359/410
• CPC Class Codes: G02B 23/10 reflecting into the field of view additional indications, e.g. from collimator

Abstract

An optical device, similar to binoculars, which includes, between the objective lens and the eyepiece a miniature screen displaying an image controlled by a computer, and an optical reflex device capable of superimposing the screen image on the image seen through the objective lens. The device also includes, selectively or cumulatively, a variable light attenuator and a light amplifier for night vision. The device can be used, in conjunction with a computer, to add further information on geographic positions, friends, enemies, infrared images, etc. into the scene seen through the binoculars.

Claims

1. A viewing device (32) comprising a casing (1) housing optical components including an objective lens (3) and an eyepiece (2), these components providing a view along an axis (AA'"'"'), a focus adjustment (55) accessible from outside the casing (1), said optical components form an image from a field of view which may include all or part of an area determined by an optical axis and an angle Known as the aperture of the optical components, said viewing device also including, inside the casing (1):

a component (4, 5, 6,

     7) to display a luminous image formed of pixels controlled by a computer, and

at least one reflex optical component (9,

     10) to superimpose the image from the display component (4, 5, 6,

     7) on the image of the field of view and mounted inside the casing, and at least one link to connect the display component (4, 5, 6,

     7) to said computer.

2. The device of claim 1 in which the component to display a luminous image comprises a light-emitting screen.

3. The device of claim 1, in which the components which generates a luminous image consists of a liquid crystal screen illuminated by lighting components.

4. The device of claim 3, in which the lighting components consist of a light-emitting plate and a reflex mirror.

5. The device of claim 1, in which the image reflex component comprises at least one lens and a semi-transparent mirror.

6. The device of claim 1, in which the reflex component comprises at least one lens, a mirror and a semi-transparent slide.

7. The device of claim 1, in which the reflex component is a hologram which acts as a mirror and fulfils a focussing function.

8. The device of claim 1, including an electrically-controlled attenuator.

9. The device of claim 8, in which the attenuator consists of a liquid crystal held between two thin transparent slides to which electrodes are fixed.

10. The device of claim 1 which also includes, placed behind the objective lens, a semi-transparent slide (16) which reflects the image seen through the objective lens towards a sensor matrix.

11. The device of claim 10 in which the sensors are infrared sensors.

12. The device of claim 1, wherein said pixels of said component to display a luminous image comprise a network of electrodes.

13. The device of claim 12, wherein said component with said pixels comprises a light emitting screen (4) located between two glass slides which carry said network of electrodes, wherein the arrangement of said electrodes define the number of said pixels in the image.

14. The device of claim 13, wherein means are provided for controlling a field between the electrodes and wherein the intensity of each pixel depends on said field.

15. The device of claim 1, wherein the component to display a luminous image comprises a screen approximately 24×

24 mm² and comprises approximately 512×

512 pixels, each measuring approximately 30×

30μ

².

16. The device of claim 15, wherein said screen has a border approximately 3 mm wide, and said screen has an electrode network, which electrode network has connections on said screen border.

17. The device of claim 16, wherein said component to display a luminous image further comprises a lighting device (6), adjacent to and of the same dimensions as the screen, and said network and said lighting device are connected to a connector (5) for connection to outside the viewing device (32).