Laser driven sealed beam lamp

• US 9,748,086 B2
• Filed: 05/14/2015
• Issued: 08/29/2017
• Est. Priority Date: 05/15/2014
• Status: Active Grant

• Current Assignee: Excelitas Technologies Corporation (Excelitas Technologies Holdings LLC)
• Original Assignee: Excelitas Technologies Corporation (Excelitas Technologies Holdings LLC)
• Inventors: Blondia, Rudi
• Primary Examiner(s): Patel, Vip
• Application Number:
  US14/712,196
• Publication Number:
  US 20150332908A1
• Time in Patent Office: 838 Days
• Field of Search: 313111114, 313634, 313637
• CPC Class Codes: H01J 61/025 Associated optical elements
• CPC Class Codes: H01J 61/16 having helium, argon, neon, krypton, or xenon as the principle constituent
• CPC Class Codes: H01J 61/24 Means for obtaining or maintaining the desired pressure within the vessel
• CPC Class Codes: H01J 61/26 Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
• CPC Class Codes: H01J 61/30 Vessels; Containers
• CPC Class Codes: H01J 61/33 Special shape of cross-section, e.g. for producing cool spot
• CPC Class Codes: H01J 61/35 provided with coatings on the walls thereof; Selection of materials for the coatings using coloured coatings H01J61/40; using luminescent coatings H01J61/42
• CPC Class Codes: H01J 61/361 Seals between parts of vessel
• CPC Class Codes: H01J 61/54 Igniting arrangements, e.g. promoting ionisation for starting
• CPC Class Codes: H01J 61/547 using an auxiliary electrode outside the vessel H01J61/544 takes precedence
• CPC Class Codes: H01J 65/04 Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
• CPC Class Codes: H05G 2/008 involving a beam of energy, e.g. laser or electron beam in the process of exciting the plasma

Abstract

A method and apparatus for a sealed high intensity illumination device are disclosed. The device is configured to receive a laser beam from a laser light source. The device has a sealed chamber configured to contain an ionizable medium. The chamber has a substantially flat ingress window disposed within a wall of the integral reflective chamber interior surface configured to admit the laser beam into the chamber, a plasma sustaining region, a plasma ignition region, and a high intensity light egress window configured to emit high intensity light from the chamber. The chamber has an integral reflective chamber interior surface configured to reflect high intensity light from the plasma sustaining region to the egress window. There is a direct path of the laser beam from the laser light source through the lens and ingress window to the lens focal region.

Claims

1. A sealed high intensity illumination device configured to receive a laser beam from a laser light source comprising:

a sealed chamber configured to contain an ionizable medium, the chamber further comprising;

an integral reflective chamber interior surface having a focal region;

a substantially flat ingress window disposed within a wall of the integral reflective chamber interior surface configured to admit the laser beam into the chamber;

a plasma sustaining region;

a plasma ignition region; and

a substantially flat high intensity light egress window configured to emit high intensity light from the chamber,

wherein the integral reflective chamber interior surface is configured to reflect high intensity light from the plasma sustaining region to the egress window, and a path of the laser beam from the laser light source through the ingress window to the focal region is direct.

2. The sealed high intensity illumination device of claim 1, further comprising a lens disposed in the path between the laser light source and the ingress window configured to focus the laser beam to a lens focal region within the chamber.

3. The sealed high intensity illumination device of claim 1, wherein the sealed chamber body is selected from the group consisting of quartz, sapphire, and metal.

4. The sealed high intensity illumination device of claim 1, wherein the sealed chamber body comprises nickel-cobalt ferrous alloy.

5. The sealed high intensity illumination device of claim 4, wherein the sealed chamber body is copper free.

6. The sealed high intensity illumination device of claim 1, wherein the reflective interior surface is substantially transparent to a wavelength of the laser beam.

7. The sealed high intensity illumination device of claim 1, wherein the plasma sustaining region and the plasma ignition region are co-located between a first electrode and a second electrode.

8. The sealed high intensity illumination device of claim 7, wherein the first electrode and the second electrode are substantially symmetrical in shape.

9. The sealed high intensity illumination device of claim 7, wherein the first electrode and the second electrode are separated by a gap of over 1 mm.

10. sealed high intensity illumination device of claim 1, wherein the ionizable medium is selected from the group consisting of Xenon gas, Argon gas, and Krypton gas.

11. The sealed high intensity illumination device of claim 1, further comprising:

a reflector disposed within the chamber disposed between the plasma sustaining region and the egress window, wherein the reflector is configured to reflect high intensity light from the plasma sustaining region toward the integral reflective chamber interior surface,

wherein the reflector is configured to prevent direct transmission of light from the plasma sustaining region to the egress window.

12. The sealed high intensity illumination device of claim 11, wherein:

the integral reflective chamber interior surface comprises a substantially parabolic contour having a parabolic focus coinciding with the plasma sustaining region; and

the reflector comprises a convex substantially hyperbolic contour.

13. The sealed high intensity illumination device of claim 1, wherein the ingress window and the egress window are disposed on substantially opposite ends of the sealed chamber.

14. The sealed high intensity illumination device of claim 1, further comprising the laser light source disposed external to the sealed chamber and configured to direct a laser light beam directly into the sealed chamber.

15. The sealed high intensity illumination device of claim 1, wherein:

the integral reflective chamber interior surface comprises a substantially elliptical contour having a first elliptic focus coinciding with the plasma sustaining region and a second elliptic focus coinciding with the egress window.

16. The sealed high intensity illumination device of claim 1, wherein the integral reflective chamber interior surface further comprises:

a first substantially parabolic contour having a first parabolic focus coinciding with the plasma sustaining region and the focal region;

a second substantially parabolic contour having a second parabolic focus coinciding with the egress window; and

a mirror disposed within the chamber configured to reflect high intensity light to and from the first parabolic focus via the first parabolic contour,

wherein the second parabolic contour is configured to reflect light from the first parabolic contour to the second parabolic focus.

17. The sealed high intensity illumination device of claim 16, wherein the first parabolic contour and the second parabolic contour are arranged to provide 1:

1 imaging from the first parabolic focus to the second parabolic focus.

18. The sealed high intensity illumination device of claim 17, wherein the egress window corresponds to the ingress surface of a light guide or fiber.

19. A scaled high intensity illumination device configured to receive a laser beam from a laser tight source comprising:

a sealed chamber configured to contain an ionizable medium, the chamber further comprising;

an ingress lens disposed within a wall of an integral reflective chamber interior surface configured to focus the laser beam to a lens focal region within the chamber;

a plasma sustaining region corresponding to the lens focal region;

a high intensity light egress window configured to emit high intensity light from the chamber;

an integral reflective chamber interior surface configured to reflect high intensity light from the plasma sustaining region to the egress window; and

a reflector disposed within the chamber disposed between the plasma sustaining region and the egress window, wherein the reflector is configured to reflect high intensity light from the plasma sustaining region toward the integral reflective chamber interior surface,

wherein a path of the laser beam from the laser light source through the ingress lens to a focal region within the chamber is direct, and the reflector is configured to prevent direct transmission of light from the plasma sustaining region to the egress window.

20. The sealed high intensity illumination device of claim 19, wherein the integral reflective chamber interior surface comprises a substantially parabolic contour having a parabolic focus coinciding with the plasma sustaining region.

21. The sealed high intensity illumination device of claim 19, wherein the reflector comprises a convex substantially hyperbolic contour.

22. The sealed high intensity illumination device of claim 19, further comprising the laser light source disposed external to the sealed chamber and configured to direct a laser light beam directly into the sealed chamber.