IP Library › Granted Patent US 6,897,609
Granted Patent B2
US 6,897,609 · App. 10/112,024 · Granted May 24, 2005

Plasma lamp and method

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Quick Facts
Patent No.
US 6,897,609
App. No.
10/112,024
Granted
May 24, 2005
Kind
B2
Abstract

An apparatus and method for achieving desired spectral emission characteristics in plasma lamps is disclosed. The apparatus and method use multi-layer thin film optical interference coatings to selectively reflect a portion of the light such that it can be absorbed in the plasma. The multi-layer thin film coating is applied to any surface of the lamp, which substantially surrounds the plasma. The number and thickness of the layers in the coating are selected to ensure that a significant portion of the selected light emitted from the plasma is reflected by the coating and absorbed by the plasma. The properties of the coating, reflectance, transmittance and absorption are determined as a function of plasma and lamp characteristics. These characteristics include the spectral emission characteristics of the plasma, the spectral absorption characteristics of the plasma, the physical dimensions of the plasma, the angular distribution of the light emitted from the plasma on the coating and the geometry of the coated surface.

Claims (8)

1. A high intensity discharge lamp having a vaporizable fill material comprising halides of sodium, scandium, and thorium wherein the operating characteristics of said lamp include a lumens per watt greater than about 85, a color rendering index greater than about 80, and a correlated color temperature between about 3000° K. and about 6000° K.

2. The lamp of claim 1 further comprising a notch filter which reflects at least seventy percent of the light generated by the lamp within a narrow wavelength band in the visible spectrum and transmits at least seventy percent of the light generated by the lamp within the visible spectrum and outside of said narrow band.

3. The lamp of claim 2 wherein the notch filter reflects at least eighty percent of the light generated by the lamp within a narrow wavelength band in the visible spectrum and transmits at least eighty percent of the light generated by the lamp within the visible spectrum and outside of said narrow band.

4. The lamp of claim 2 wherein the narrow wavelength band is substantially centered on a wavelength of about 590 mm.

5. The lamp of claim 2 wherein said notch filter comprises a multilayer coating.

6. The lamp of claim 5 wherein said coating is applied to the outer surface of the arc tube containing said fill material.

7. The lamp of claim 5 further comprising a shroud substantially surrounding the arc tube, wherein said coating is applied to said shroud.

8. The lamp of claim 2 wherein said filter comprises a shroud substantially surrounding the arc tube.

Assignments (15)
TERMINATION AND RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY Recorded Mar 18, 2021
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: ADVANCED LIGHTING TECHNOLOGIES, LLC; ADLT FINANCE CO.; 9999 SALES, INC.; ADLT REALTY CORP. I, INC.; ADVANCED LIGHTING MATERIALS NORTH AMERICA, INC.; ADVANCED LIGHTING TECHNOLOGIES AUSTRALIA, INC.; APL ENGINEERED MATERIALS, INC.; EDSG, INC.; EPIC DESIGN SERVICES GROUP, INC.; LIGHTING RESOURCES INTERNATIONAL, INC.; VENTURE LIGHTING INTERNATIONAL, INC.
Reel/Frame 056887/0364 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY Recorded Mar 18, 2021
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: EDSG, INC.; ADVANCED LIGHTING TECHNOLOGIES, LLC; ADLT FINANCE CO.; 9999 SALES, INC.; ADLT REALTY CORP. I, INC.; ADVANCED LIGHTING MATERIALS NORTH AMERICA, INC.; ADVANCED LIGHTING TECHNOLOGIES AUSTRALIA, INC.; APL ENGINEERED MATERIALS, INC.; EPIC DESIGN SERVICES GROUP, INC.; LIGHTING RESOURCES INTERNATIONAL, INC.; VENTURE LIGHTING INTERNATIONAL, INC.
Reel/Frame 056886/0441 →
RELEASE OF SECURITY INTEREST Recorded Mar 17, 2021
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: ADVANCED LIGHTING TECHNOLOGIES, LLC; ADLT FINANCE CO.; 9999 SALES, INC.; ADLT REALTY CORP. I, INC.; ADVANCED LIGHTING MATERIALS NORTH AMERICA, INC.; ADVANCED LIGHTING TECHNOLOGIES AUSTRALIA, INC.; APL ENGINEERED MATERIALS, INC.; EDSG, INC.; EPIC DESIGN SERVICES GROUP, INC.; LIGHTING RESOURCES INTERNATIONAL, INC.; VENTURE LIGHTING INTERNATIONAL, INC.
Reel/Frame 055632/0332 →
RELEASE OF SECURITY INTEREST Recorded Mar 17, 2021
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: ADVANCED LIGHTING TECHNOLOGIES, LLC; ADLT FINANCE CO.; 9999 SALES, INC.; ADLT REALTY CORP. I, INC.; ADVANCED LIGHTING MATERIALS NORTH AMERICA, INC.; ADVANCED LIGHTING TECHNOLOGIES AUSTRALIA, INC.; APL ENGINEERED MATERIALS, INC.; EDSG, INC.; EPIC DESIGN SERVICES GROUP, INC.; LIGHTING RESOURCES INTERNATIONAL, INC.; VENTURE LIGHTING INTERNATIONAL, INC.
Reel/Frame 055632/0550 →
RELEASE OF SECURITY INTEREST Recorded Mar 17, 2021
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: ADVANCED LIGHTING TECHNOLOGIES, LLC; VENTURE LIGHTING INTERNATIONAL, INC.; APL ENGINEERED MATERIALS, INC.
Reel/Frame 055632/0571 →
SECURITY INTEREST Recorded Dec 22, 2017
From: ADVANCED LIGHTING TECHNOLOGIES, LLC; APL ENGINEERED MATERIALS, INC.; VENTURE LIGHTING INTERNATIONAL, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 044949/0179 →
SECURITY INTEREST Recorded Oct 6, 2017
From: ADVANCED LIGHTING TECHNOLOGIES, LLC; ADLT FINANCE CO.; 9999 SALES, INC.; ADLT REALTY CORP. I, INC.; ADVANCED LIGHTING MATERIALS NORTH AMERICA, INC.; ADVANCED LIGHTING TECHNOLOGIES AUSTRALIA, INC.; APL ENGINEERED MATERIALS, INC.; EDSG, INC.; EPIC DESIGN SERVICES GROUP, INC.; LIGHTING RESOURCES INTERNATIONAL, INC.; VENTURE LIGHTING INTERNATIONAL, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 044144/0466 →
SECURITY INTEREST Recorded Oct 5, 2017
From: ADVANCED LIGHTING TECHNOLOGIES, LLC; VENTURE LIGHTING INTERNATIONAL, INC.; 9999 SALES, INC.; ADLT FINANCE CO.; ADLT REALTY CORP. I, INC.; ADVANCED LIGHTING MATERIALS NORTH AMERICA, INC.; ADVANCED LIGHTING TECHNOLOGIES AUSTRALIA, INC.; APL ENGINEERED MATERIALS, INC.; EDSG, INC.; EPIC DESIGN SERVICES GROUP, INC.; LIGHTING RESOURCES INTERNATIONAL, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 044213/0227 →
SECURITY AGREEMENT Recorded Jun 14, 2012
From: ADVANCED LIGHTING TECHNOLOGIES, INC.; DEPOSITION SCIENCES, INC.
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT AND COLLATERAL AGENT
Reel/Frame 028372/0627 →
SECURITY AGREEMENT Recorded Jun 4, 2012
From: ADVANCED LIGHTING TECHNOLOGIES, INC.; VENTURE LIGHTING INTERNATIONAL, INC.; DEPOSITION SCIENCES, INC.; APL ENGINEERED MATERIALS, INC.; 9999 SALES, INC.; ADVANCED LIGHTING MATERIALS NORTH AMERICA, INC.; LIGHTING RESOURCES INTERNATIONAL, INC.; EPIC DESIGN SERVICES GROUP, INC.; EDSG, INC; ADVANCED LIGHTING TECHNOLOGIES AUSTRALIA, INC.; ADLT REALTY CORP. I, INC.
To: U.S. BANK NATIONAL ASSOCIATION
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RELEASE OF SECOND LIEN SECURITY INTEREST IN PATENTS Recorded Jun 1, 2012
From: CIT LENDING SERVICES CORPORATION
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RELEASE OF FIRST LIEN SECURITY INTEREST IN PATENTS Recorded Jun 1, 2012
From: CIT LENDING SERVICES CORPORATION
To: ADVANCED LIGHTING TECHNOLOGIES, INC.
Reel/Frame 028300/0885 →
RELEASE OF SECURITY INTEREST Recorded Jun 6, 2007
From: WELLS FARGO FOOTHILL, INC.
To: ADVANCED LIGHTING TECHNOLOGIES, INC.
Reel/Frame 019382/0950 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 19, 2004
From: LAMOURI, ABBAS; SULCS, JURIS
To: ADVANCED LIGHTING TECHNOLOGIES, INC.
Reel/Frame 016037/0797 →
SECURITY AGREEMENT Recorded Dec 30, 2003
From: ADVANCED LIGHTING TECHNOLOGIES, INC.
To: WELLS FARGO FOOTHILL, INC., AS AGENT
Reel/Frame 014836/0621 →