Patent US4003074A successfully refreshed from Google Patents.
US4003074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically-sealed injection semiconductor laser device
Assignee: Nippon Selfoc Co Ltd
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Filing: 1974-10-29
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Granted: 1977-01-11
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Expires: 1994-10-29
Abstract
Abstract A hermetically sealed injection semiconductor laser device includes a hollow cylinder in which a crystal laser pellet is enclosed. The ends of the cylinder are sealed by metal electrodes one of which projects axially into the cylinder and is connected to an electrode surface of the crystal pellet. A lens element is disposed within the cylinder.
Inventors
- 👤 Hiroo Yonezu
- 👤 Izuo Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:29
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/022; H01S5/0225; H01S5/02253; G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4206; G02B6/421; H01S5/024; H01S5/02208
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
A hermetically sealed injection semiconductor laser device comprising: a pair of metal electrodes; a hollow generally cylindrical body of transparent insulating material having said pair of metal electrodes hermetically sealed to its ends and having one of said pair of metal electrodes protruding axially into its interior; a semiconductor laser crystal pellet having an electrode surface thermally and electrically connected to the end of said protruding metal electrode with its light-emitting ends facing the wall of said hollow cylindrical body for emitting light rays in two opposite directions; a flexible lead wire for electrically coupling another electrode surface of said pellet to the other of said pair of metal electrodes; and a lens element at least partially disposed within said hollow cylindrical body and having its optical axis substantially perpendicular to the wall of said hollow cylindrical body, for converting said light rays into focussed or substantially parallel light rays, whereby said light rays are derived from two portions of the wall of said hollow cylindrical body.
Claim 2
Dependent Claim
167 words
A hermetically sealed injection semiconductor laser device comprising: a pair of metal electrodes; a hollow generally cylindrical body of transparent insulating material having said pair of metal electrodes hermetically sealed to its ends and having one of said pair of metal electrodes protruding axially into its interior; a semiconductor laser crystal pellet having an electrode surface thermally and electrically connected to the end of said protruding metal electrode with its light-emitting ends facing the wall of said hollow cylindrical body for emitting light rays in two opposite directions; a flexible lead wire for electrically coupling another electrode surface of said pellet to the other of said pair of metal electrodes; and a lens element at least partially disposed within said hollow cylindrical body and having its optical axis substantially perpendicular to the wall of said hollow cylindrical body, for converting said light rays into focussed or substantially parallel light rays, whereby said light rays are derived from two portions of the wall of said hollow cylindrical body.
Claim 3
Dependent Claim
36 words
A hermetically sealed injection semiconductor laser device as set forth in claim 1 wherein said hollow cylindrical body has at least one flat portion lying on an extension of the optical axis of said lens element.
Claim 4
Dependent Claim
31 words
A hermetically sealed injection semiconductor laser device as set forth in claim 1 wherein said lens element is made of a cylindrical body and extends radially through said hollow cylindrical body.
Claim 5
Dependent Claim
24 words
A hermetically sealed injection semiconductor laser device as set forth in claim 1 wherein said lens element is disposed entirely within said cylindrical body.
Claim 6
Dependent Claim
39 words
A hermetically sealed injection semiconductor laser device as set forth in claim 1 wherein the protruding end of said protruding metal electrode defines at least one step to facilitate the alignment of said lens element with said crystal pellet.
References Cited (Backward Citations)
US3354316A
Cited
US3568087A
Cited
US3303432A
Cited
US3701043A
Cited
US3675150A
Cited
US3787782A
Cited
US3816847A
Cited
US3840889A
Cited
US3855546A
Cited
US3842262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |