Modular and reconfigurable episcopic sight

• US 5,204,489 A
• Filed: 12/17/1990
• Issued: 04/20/1993
• Est. Priority Date: 12/20/1989
• Status: Expired due to Fees

• Current Assignee: GIAT Industries
• Original Assignee: GIAT Industries
• Inventors: Pellarin, Jean-Francois R., Colin, Gilles M.
• Primary Examiner(s): JOHNSON, STEPHEN
• Application Number:
  US07/628,012
• Time in Patent Office: 855 Days
• Field of Search: 89/36.14, 89/41.06, 89/41.19, 89/41.22, 350/538, 350/540, 350/541, 350/542, 350/557, 350/566, 350/569
• US Class Current: 89/41.19
• CPC Class Codes: F41G 3/065 Structural association of sighting-devices with laser telemeters
• CPC Class Codes: F41G 3/22 for vehicle-borne armament, e.g. on aircraft
• CPC Class Codes: F41H 5/266 Periscopes for fighting or armoured vehicles

Abstract

The invention relates to an episcopic sight usable for observation and firing by day or night on a vehicle equipped with a gun. The sight includes an assembly of interchangeable moduli grouping the optical elements, particularly made of a head modulus 1 containing a mirror controlled in elevation, a height increase modulus 2, a day sight modulus 4, a night sight modulus 5, a rangefinder modulus 6, an electronic case associated to a fire-control computer. It includes a modulus of separation 3 of the day and night channels interposed between the height increase modulus 2, and the day and night moduli 4, 5, the modulus of separation 3 containing the means for generating a sight reticle in the day and night channels. The means of generating a firing reticle include a projection collimator of this reticle and a rhombohedron to inject this reticle into the day and night moduli.

Claims

1. A modular episcopic sight for day and night observation and firing of a gun for a vehicle, said gun defining a firing axis, comprising:

a head module containing a head mirror adapted for rigid connection to said vehicle;

a module of separation adapted for rigid attachment to said vehicle for receiving an image from said head mirror, wherein said module of separation includes a sight reticule and means for generation of an image of said sight reticule; and

a detachable day module and a detachable night module cooperable with said module of separation such that said image of said sight reticule is projected into said day and night modules, wherein said means for generation of an image of said sight reticule comprises;

(a) a projection collimator defined by a diode for illuminating said sight reticule; and

(b) a rhombohedron to project said image of said sight reticule into said day and night modules, wherein said rhombohedron comprises a first face opposite said night module and a second face opposite said day module, said first face treated to reflect a portion of radiation emitted by said diode toward said second face and to transmit another portion of radiation to said night module, said second face treated to reflect said portion of radiation to said day module.

2. The device of claim 1, further comprising a height increase module inserted between said head module and said module of separation.

3. The device of claim 1, wherein said day module comprises:

a lens cooperable with an image reflected from said head mirror;

a prism positioned to receive said image after passing through said lens; and

an eyepiece positioned to receive said image after reflection in said prism, thereby allowing an observer to view said image through said eyepiece.

4. The device of claim 1, wherein said night module comprises:

a lens cooperable with an image reflected from said head mirror;

an image intensifier tube positioned to receive said image after passing through said lens; and

an eyepiece positioned to receive said image after passing through said image intensifier tue, thereby allowing an observer to view said image through said eyepiece.

5. A modular episcopic sight for day and night observation and firing of a gun for a vehicle, said gun defining a firing axis, comprising:

a head module containing a head mirror adapted for rigid connection to said vehicle;

a module of separation adapted for rigid attachment to said vehicle for receiving an image from said head mirror, wherein said module of separation comprises a sight reticule and means for generation of an image of said sight reticule;

a detachable day module and a detachable night module cooperable with said module of separation such that said image of said sight reticule is projected into said day and night modules;

a detachable laser rangefinder module adapted for attachment to said day module; and

a laser rangefinder reticule illuminated by a diode in said day module, said laser rangefinder reticule being harmonized with transmission and reception beams generated by said laser rangefinder module.

6. The device of claim 5, further comprising a fire-control computer for calculation of firing parameters.

7. The device of claim 5, wherein said day module comprises an eyepiece to allow an observer to view said image through said eyepiece, said device further comprising a dichroic cube positioned in said day module to reflect said reception beam toward said laser rangefinder and to transmit visible radiation to said eyepiece.

8. The device of claim 7, wherein said module of separation comprises a rhombohedron having a first face and a second face, and a cube corner whose base is placed near said first face of said rhombohedron at an angle of 45°

with respect to said first face, said rhombohedron and said cube corner positioned to project and image of said laser reticule into said night module.

9. The device of claim 8, wherein said second face is treated to substantially totally reflect radiation emitted by said diode, and said first face is treated to partially reflect radiation emitted by said diode, thereby projecting said image of said laser rangefinder reticule into said day and night modules.

10. A modular episcopic sight for day and night observation and firing of a gun for a vehicle, said gun defining a firing axis, comprising:

a head module containing a head mirror adapted for rigid connection to said vehicle;

a module of separation adapted for rigid attachment to said vehicle for receiving an image from said head mirror, wherein said module of separation comprises a sight reticule and means for generation of an image of said sight reticule;

a detachable day module and a detachable night module cooperable with said module of separation such that said image of said sight reticule is projected into said day and night modules; and

a detachable laser rangefinder module adapted for attachment to said day module, wherein said head module and said module of separation are adapted for rigid assembly on a turret of said vehicle such that a sight axis associated with said sight reticule is harmonized in elevation and azimuth with said firing axis, and wherein said day module and said laser rangefinder module, and said night module is connected to said module of separation by a snap fastener device.