TARGET MARKING SYSTEM HAVING A GAS LASER ASSEMBLY AND A THERMAL IMAGER

• US 20090110019A1
• Filed: 10/26/2007
• Published: 04/30/2009
• Est. Priority Date: 10/26/2007
• Status: Active Grant

• Current Assignee: LMD Applied Science LLC
• Original Assignee: LaserMax Incorporated
• Inventors: Houde-Walter, William R., Houde-Walter, Susan, Mock, Jeffrey, Gagliano, Christopher, Olmsted, Brian, Wolinski, Jeffrey
• Granted Patent: US 7,818,911 B2
• Time in Patent Office: Days
• US Class Current: 372/55
• CPC Class Codes: F41G 1/36 with infrared light source
• CPC Class Codes: F41G 3/145 using a target illuminator
• CPC Class Codes: H01S 3/10069 Memorized or pre-programmed characteristics, e.g. look-up table [LUT]
• CPC Class Codes: H01S 3/2232 Carbon dioxide (CO2) or monoxide [CO]

Abstract

A handheld target marker is provided, wherein the target marker includes a housing retaining a gas laser, a collimating or focusing lens, a driver and a power supply. The laser produces a thermal infrared beam which can be selectively directed to impinge upon a target. The impinging beam is viewable by a thermal imager. The handheld target marker operates at ambient temperatures and incorporates the driver and power supply necessary for operation of the laser, wherein the beam can be pulsed for enhancing imaging on the thermal imager.

Claims

1. A target marking system comprising:

(a) a thermal imager selected to detect and image thermal radiation;

(b) a handheld target marker having a housing defining an interior and an exterior;

(c) a molecular vibrational mode laser retained in the interior of the housing for emitting a beam at beam wavelength along a beam path, the beam wavelength selected to induce a localized temperature differential in a target detectable by the thermal imager;

(d) a driver retained within the housing and operably connected to the laser causing the laser to emit the beam along the beam path;

(e) a lens system connected to the housing and located in the beam path, the lens system including optics to one of focus and collimate the beam;

(f) a filter in the beam path to substantially preclude passage of radiation outside the beam wavelength; and

(g) a power supply operably connected to at least one of the driver and the laser.

2. The target marking system of claim 1, wherein the molecular vibrational mode laser is one of a carbon dioxide laser and a carbon monoxide laser.

3. The target marking system of claim 1, wherein the beam wavelength includes 10.6 microns.

4. The target marking system of claim 1, wherein the handheld target marker is one of a designator, a pointer and an aiming device.

5. The target marking system of claim 1, further comprising a temperature controller thermally coupled to the laser.

6. The target marking system of claim 5, wherein the temperature controller is one of a Peltier and a Stirling module.

7. The target marking system of claim 1, further comprising a diffractive optic in the beam path.

8. The target marking system of claim 6, wherein the diffractive optic collimates the beam.

9. The target marking system of claim 6, wherein the diffractive optic is one of movable and fixed elative to the beam path.

10. The target marking system of claim 1, wherein the laser is a tunable carbon dioxide laser.

11. The target marking system of claim 1, wherein the lens system includes sub diffraction limited optics.

12. The target marking system of claim 1, further comprising an LC circuit to one of automatically and actively optimize an RF coupling with the laser.

13. The target marking system of claim 1, further comprising one of a robotic or a remote control controlling the target marker enabling operating instructions to the target marker from a spaced location.

14. The target marking system of claim 1, further comprising one of an IFF transceiver and transponder operably connected to the target marker.

15. A method of marking a target comprising:

(a) intersecting a pulsed thermal infrared beam from a carbon dioxide laser retained in handheld housing with the target; and

(b) remotely imaging the intersection of the pulsed beam with a thermal imager.

16. The method of claim 15, further comprising phase locking pixels of the thermal imager with respect to a frequency of the pulsed thermal infrared beam.

17. The method of claim 15, further comprising embedding a communication signal in a pulse rate of the thermal infrared beam.

18. The method of claim 15, further comprising modulating a pulse rate of the thermal infrared beam and synchronizing the thermal imager to detect the same phase and modulated pulse rate for each pixel of an imaging array in the thermal imager.

19. The method of claim 15, further comprising passing the pulsed thermal infrared beam through locating sub diffraction limiting optics prior to intersecting the target.

20. A weapons-mounted target marker viewable by a thermal imaging system, the target marker comprising:

(a) a weapon selectively discharging a projectile, the weapon including an external mount;

(b) a housing having an interior and an exterior, the housing releasably coupled to the external mount of the weapon;

(c) a gas laser retained in the interior of the housing for emitting a beam at a thermal infrared wavelength along a beam path;

(d) a driver retained within the housing and operably connected to the gas laser, the driver providing a pulsed beam along the beam path;

(e) a lens system located in the beam path, the lens system one of focusing and collimating the beam; and

(f) a power supply connected to one of the weapon and the housing for supplying power to the gas laser.

21. The weapons-mounted target marker of claim 20, further comprising a temperature controller thermally coupled to the gas laser.

22. The weapons-mounted target marker of claim 20, further comprising a diffractive optic in the beam path.

23. The weapons-mounted target marker of claim 20, wherein the gas laser is one of a carbon dioxide laser and a carbon monoxide laser.

24. The weapons-mounted target marker of claim 20, wherein the gas laser is tunable.

25. A target marker viewable by a thermal imaging system, the target marker comprising:

(a) a mountable housing having an interior and an exterior, the housing selected to engage one of a weapon, a tripod and a vehicle;

(c) a gas laser retained in the interior of the housing for emitting a beam at a thermal infrared wavelength along a beam path;

(d) a driver retained within the housing and operably connected to the gas laser, the driver providing a pulsed beam along the beam path;

(e) a lens system located in the beam path, the lens system one of focusing and collimating the beam; and

(f) a power supply connected to one of the weapon and the housing for supplying power to the gas laser.