Multi-spectral electrodeless ultraviolet light source, lamp module, and lamp system

Patent metadata

Field	Value
Publication number	US-9613792-B2
Application number	US-201414208240-A
Country	US
Kind code	B2
Filing date	Mar 13, 2014
Priority date	Mar 15, 2013
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

An elongated light source envelope is disclosed. The elongated light source comprises an inner wall and an outer wall formed around a longitudinal axis. The inner wall and the outer wall may be connected at a first axial end by a first side wall and a second axial end by a second side wall. The inner wall, outer wall, the first side wall, and the second side wall define an enclosed space internal to the envelope. The light source envelope further comprises one or more walls formed between the inner wall and the outer wall to further form at least a first enclosed region and a second enclosed region within the enclosed space. The first enclosed region may be configured to emit a different spectrum of ultraviolet radiation from the second enclosed region in response to excitation of the first enclosed region and the second enclosed region by microwave radiation.

First claim

What is claimed is:

1. An elongated light source envelope, comprising:
an inner wall and an outer wall formed around a longitudinal axis, the inner wall and the outer wall connected at a first axial end by a first side wall and a second axial end by a second side wall, the inner wall, the outer wall, the first side wall, and the second side wall defining an enclosed space internal to the envelope; and
one or more walls included between the inner wall and the outer wall to form at least a first enclosed region and a second enclosed region within the enclosed space, wherein the one or more walls extending along the longitudinal axis from the first side wall to the second side wall,
and wherein the inner wall defines an inner space of the elongated light source envelope configured to receive an antenna.

2. The light source envelope of claim 1 , wherein the first enclosed region is configured to emit a different spectrum of ultraviolet radiation from the second enclosed region in response to excitation of the first enclosed region and the second enclosed region by microwave radiation.

3. The light source envelope of claim 1 , wherein the first enclosed region is filled with a first fill material and the second enclosed region is filled with a second fill material different from the first fill material.

4. The light source envelope of claim 3 , wherein the wavelengths of light emittable from the first enclosed region and the second enclosed region are adjusted by varying a type of fill material or an amount of fill material in the first enclosed region and the second enclosed region, respectively.

5. The light source envelope of claim 1 , wherein the first enclosed region and the second enclosed region have different major emission peak wavelengths.

6. A lamp module, comprising:
(a) an elongated light source envelope, including
(i) an inner wall and an outer wall formed around a longitudinal axis, the inner wall and the outer wall connected at a first axial end by a first side wall and a second axial end by a second side wall, the inner wall, the outer wall, the first side wall, and the second side wall defining an enclosed space internal to the envelope, the inner wall defining an inner space around the longitudinal axis, and
(ii) one or more walls included between the inner wall and the outer wall to form at least a first enclosed region and a second enclosed region within the enclosed space, wherein the one or more walls extending along the longitudinal axis from the first side wall to the second side wall; and

(b) an antenna inserted in the inner space.

7. The lamp module of claim 6 , wherein the antenna comprises an antenna lead having a first end proximal to the inner space and a second end configured to be connected to a radio frequency (RF) or microwave energy source.

8. The lamp module of claim 7 , wherein the antenna lead is an exposed inner conductor of a coaxial cable.

9. The lamp module of claim 6 , wherein the first enclosed region is configured to emit a different spectrum of ultraviolet radiation from the second enclosed region in response to excitation of the first enclosed region and the second enclosed region by microwave radiation.

10. The lamp module of claim 6 , wherein the first enclosed region is filled with a first fill material and the second enclosed region is filled with a second fill material different from the first fill material.

11. The lamp module of claim 10 , wherein the wavelengths of light emittable by the first enclosed region and the second enclosed region are adjusted by varying a type of fill material or an amount of fill material in the first enclosed region and the second enclosed region, respectively.

12. The lamp module of claim 6 , wherein the first enclosed region and the second enclosed region have different major emission peak wavelengths.

13. A lamp system, comprising:
a housing;
a radio frequency (RF) or microwave energy source located within the housing;
an antenna coupled to the RF or microwave energy source; and
an elongated light source envelope radiatively coupled to the RF or microwave energy source, the elongated light source envelope including
(i) an inner wall and an outer wall formed around a longitudinal axis, the inner wall and outer wall connected at a first axial end by a first side wall and a second axial end by a second side wall, the inner wall, outer wall, the first side wall, and the second side wall defining an enclosed space internal to the envelope, the inner wall defining an inner space around the longitudinal axis, and
(ii) one or more walls included between the outer wall and the inner wall to form at least a first enclosed region and a second enclosed region within the enclosed space, wherein the one or more walls extending along the longitudinal axis from the first side wall to the second side wall,

wherein the antenna is inserted in the inner space.

14. The lamp system of claim 13 , wherein the antenna comprises an antenna lead having a first end proximal to the inner space and a second end coupled to the RF or microwave energy source.

15. The lamp system of claim 14 , wherein the antenna comprises a coaxial cable coupled to the RF or microwave energy source, the antenna formed from an inner conductor of the coaxial cable, the inner conductor having an exposed section located within the inner space.

16. The lamp system of claim 13 , further comprising a reflector located around the outer wall of the light source envelope.

17. The lamp system of claim 13 , wherein the first enclosed region is configured to emit a different spectrum of ultraviolet radiation from the second enclosed region in response to excitation of the first enclosed region and the second enclosed region by microwave radiation emitted by the antenna.

18. The lamp system of claim 13 , wherein the first enclosed region is filled with a first fill material and the second enclosed region is filled with a second fill material different from the first fill material.

19. The lamp system of claim 18 , wherein the wavelengths of light emittable by the first enclosed region and the second enclosed region are adjusted by varying a type of fill material or an amount of fill material in the first enclosed region and the second enclosed region, respectively.

20. The lamp system of claim 13 , wherein the first enclosed region and the second enclosed region have different major emission peak wavelengths.

Assignees

• Heraeus Noblelight America Llc
• Consiglio Nazionale Ricerche

Inventors

• Harbourne Andrew David Paul
• Swain Pradyumna Kumar
• Longo Iginio
• Ferrari Carlo

Classifications

• H01J65/044

  the field being produced by a separate microwave unit · CPC title

• H01J61/33

  Special shape of cross-section, e.g. for producing cool spot · CPC title

• H01J65/042 Primary

  by an external electromagnetic field · CPC title

• H01J61/302

  characterised by the material of the vessel · CPC title

• H01J61/86

  with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection · CPC title