Patent US5608743A successfully refreshed from Google Patents.
US5608743A
Expired / Lapsed
US
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Semiconductor light emitting device
Assignee: Nichia Corp
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Filing: 1995-07-14
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Granted: 1997-03-04
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Expires: 2015-07-14
Abstract
Abstract A semiconductor light emitting device includes a semiconductor light amplifier, a mirror which reflects light emanating from the rear end face of the semiconductor light amplifier to return the light to the rear end face of the semiconductor light amplifier, and a band pass filter which is inserted into the optical path of the light emanating from the rear end face of the semiconductor light amplifier and has a narrow transmission wavelength band.
Inventors
- 👤 Toshiro Hayakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:49
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/10; H01S5/14; H01S5/141; H01S5/50; H01S5/5009; H01S5/5018; H01S5/06; H01S5/065; H01S5/1053; H01S5/1064; H01S5/20; H01S5/5045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A semiconductor light emitting device comprising a semiconductor light amplifier, a mirror which reflects light emanating from one end face of the semiconductor light amplifier to return the light to said on end face of the semiconductor light amplifier, and a band pass filter which is inserted into the optical path of the light emanating from said one end face of the semiconductor light amplifier and has a narrow transmission wavelength band.
Claim 2
Dependent Claim
72 words
A semiconductor light emitting device comprising a semiconductor light amplifier, a mirror which reflects light emanating from one end face of the semiconductor light amplifier to return the light to said on end face of the semiconductor light amplifier, and a band pass filter which is inserted into the optical path of the light emanating from said one end face of the semiconductor light amplifier and has a narrow transmission wavelength band.
Claim 3
Dependent Claim
111 words
A semiconductor light emitting device comprising a semiconductor light amplifier, a mirror which reflects light emanating from one end face of the semiconductor light amplifier to return the light to said one end face of the semiconductor light amplifier, a band pass filter which is inserted into the optical path of the light emanating from said one end face of the semiconductor light amplifier and has a narrow transmission wavelength band, and a focusing lens which focuses the light emanating from said one end face of the semiconductor light amplifier and images a light emission near field pattern of said one end face of the semiconductor light amplifier on the mirror.
Claim 4
Dependent Claim
111 words
A semiconductor light emitting device comprising a semiconductor light amplifier, a mirror which reflects light emanating from one end face of the semiconductor light amplifier to return the light to said one end face of the semiconductor light amplifier, a band pass filter which is inserted into the optical path of the light emanating from said one end face of the semiconductor light amplifier and has a narrow transmission wavelength band, and a focusing lens which focuses the light emanating from said one end face of the semiconductor light amplifier and images a light emission near field pattern of said one end face of the semiconductor light amplifier on the mirror.
Claim 5
Dependent Claim
38 words
A semiconductor light emitting device as defined in claim 2 in which said the mirror is shaped to selectively,reflect a particular transverse mode component of the light emanating from said one end face of the semiconductor light amplifier.
Claim 6
Dependent Claim
60 words
A semiconductor light emitting device as defined in claim 2 or 3 in which a mask which interrupts a part of the light emanating from said one end face of the semiconductor light amplifier and permits only a particular transverse mode component of the light to impinge upon the mirror is provided between the mirror and the semiconductor light amplifier.
References Cited (Backward Citations)
US5392308A
Cited
US5493575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-03 | 2000-09-02 | 2001-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-03 | 2004-09-02 | 2005-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-03 | 2008-09-02 | 2009-03-04 | $7700.00 | Window Closed / Lapsed |