US5208462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide bandwidth solid state optical source
Assignee: Honeywell International Inc
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Filing: 1991-12-19
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Granted: 1993-05-04
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Expires: 2011-12-19
Abstract
Abstract A phosphor is placed on a light emitting surface of a solid state optical source. The phosphor absorbs the narrow bandwidth light from the optical source, and emits light that has a wide bandwidth. A lens is used to collect and focus the wide bandwidth light.
Inventors
- 👤 James M. O'Connor
- 👤 Olaleye A. Aina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:49
CPC Classifications
G; G02; G02F; G02F2/00; G02F2/02; H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/851; H10H20/8511; H10H20/8512; H10H20/855
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
A wide bandwidth solid state optical source, comprising: (a) a solid state optical source having a light emitting surface which emits a first light having a first FWHM bandwidth; (b) a phosphor positioned near said light emitting surface so that said phosphor absorbs said first light and emits a second light having a second FWHM bandwidth, said phosphor containing a material selected from the group consisting of CaS and SrS, said material being doped with Yb and said second FWHM bandwidth being greater than said first FWHM bandwidth; said phosphor being in a powder form and mixed with an epoxy which is nearly transparent to the wavelength emitted by both the solid state optical source and the phosphor; and a lens positioned to capture said second light.
Claim 2
Dependent Claim
127 words
A wide bandwidth solid state optical source, comprising: (a) a solid state optical source having a light emitting surface which emits a first light having a first FWHM bandwidth; (b) a phosphor positioned near said light emitting surface so that said phosphor absorbs said first light and emits a second light having a second FWHM bandwidth, said phosphor containing a material selected from the group consisting of CaS and SrS, said material being doped with Yb and said second FWHM bandwidth being greater than said first FWHM bandwidth; said phosphor being in a powder form and mixed with an epoxy which is nearly transparent to the wavelength emitted by both the solid state optical source and the phosphor; and a lens positioned to capture said second light.
Claim 3
Dependent Claim
19 words
The wide bandwidth solid state optical source of claim 1, wherein said solid state optical source is a LED.
Claim 4
Dependent Claim
20 words
The wide bandwidth solid state optical source of claim 1, wherein said solid state optical source is a laser diode.
Claim 5
Dependent Claim
20 words
The wide bandwidth solid state optical source of claim 1, wherein said solid state optical source is a GaAs diode.
Claim 6
Dependent Claim
20 words
The wide bandwidth solid state optical source of claim 1, wherein said solid state optical source is a InGaAs diode.
Claim 7
Dependent Claim
26 words
The wide bandwidth solid state optical source of claim 1, wherein said second light has a center wavelength between approximately 600 nm and approximately 900 nm.
Claim 8
Dependent Claim
22 words
The wide bandwidth solid state optical source of claim 1, wherein said second light has a FWHM bandwidth greater than 100 nm.
Claim 9
Dependent Claim
143 words
A wide bandwidth solid state optical source, comprising: (a) a solid state optical source having a light emitting surface which emits a first light having a first FWHM bandwidth; (b) a phosphor positioned near said light emitting surface so that said phosphor absorbs said first light and emits a second light having a center wavelength between approximately 600 nm and approximately 900 nm and having a second FWHM bandwidth being greater than said first FWHM bandwidth and being between 100 nm and approximately 200 nm, said phosphor being in powder form and mixed with an epoxy which is nearly transparent to the wavelength emitted by both the solid state optical source and the phosphor, and containing a material selected from the group consisting of CaS and SrS, said material being doped with Yb; and (c) a lens positioned to capture said second light.
Claim 10
Dependent Claim
143 words
A wide bandwidth solid state optical source, comprising: (a) a solid state optical source having a light emitting surface which emits a first light having a first FWHM bandwidth; (b) a phosphor positioned near said light emitting surface so that said phosphor absorbs said first light and emits a second light having a center wavelength between approximately 600 nm and approximately 900 nm and having a second FWHM bandwidth being greater than said first FWHM bandwidth and being between 100 nm and approximately 200 nm, said phosphor being in powder form and mixed with an epoxy which is nearly transparent to the wavelength emitted by both the solid state optical source and the phosphor, and containing a material selected from the group consisting of CaS and SrS, said material being doped with Yb; and (c) a lens positioned to capture said second light.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |