Patent US5662620A successfully refreshed from Google Patents.
US5490158A
Expired / Lapsed
US
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Laser unit
Assignee: Canon Inc
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Filing: 1994-01-26
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Granted: 1996-02-06
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Expires: 2014-01-26
Abstract
Abstract A laser unit includes a semiconductor laser tip mounted on a substrate of a material such as Si, a monitoring photodiode, and a laser driving integrated circuit, all of which are fixed to a base member of a material, such as metal, by soldering or the like. Further, a collimator lens is fixed to the base member by using, for example, ultraviolet ray hardening resin. The base member is provided with a step or slope portion, or a cut-away portion, formed at its laser-light-emission end, whereby the laser unit can be made compact and the distance between the semiconductor laser tip and the laser driving circuit can be shortened.
Inventors
- 👤 Shin Mogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:44
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/435; B41J2/47; B41J2/471; H; H01; H01S; H01S5/00; H01S5/02; H01S5/022; H01S5/0225; H01S5/02253; H01S5/023; H01S5/02325; H01S5/06; H01S5/068; H01S5/0683
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
79 words
A laser unit comprising: a semiconductor laser tip; a laser driving integrated circuit for driving said semiconductor laser tip; a condenser lens for condensing a laser light beam emitted by said semiconductor laser type; and a single base, said semiconductor laser tip, said laser driving integrated circuit and said condenser lens being mounted to said base, wherein said base contains a hollow portion therein, and wherein said semiconductor laser tip is mounted in said hollow portion and sealed therein.
Claim 2
Dependent Claim
79 words
A laser unit comprising: a semiconductor laser tip; a laser driving integrated circuit for driving said semiconductor laser tip; a condenser lens for condensing a laser light beam emitted by said semiconductor laser type; and a single base, said semiconductor laser tip, said laser driving integrated circuit and said condenser lens being mounted to said base, wherein said base contains a hollow portion therein, and wherein said semiconductor laser tip is mounted in said hollow portion and sealed therein.
Claim 3
Dependent Claim
15 words
A laser unit according to claim 1, wherein said condensor lens comprises a collimator lens.
Claim 4
Dependent Claim
14 words
A laser unit according to claim 1, wherein said base comprises a metal member.
Claim 5
Dependent Claim
27 words
A laser unit according to claim 1, wherein said base includes one of a step portion and a cut-away portion at a laser-light-emission end of said base.
Claim 6
Dependent Claim
23 words
A laser unit according to claim 1, wherein said condensor lens is fixed to said base using an adhesion of ultraviolet hardening resin.
Claim 7
Dependent Claim
38 words
A laser unit according to claim 1, further comprising a photodiode for receiving and monitoring a laser light beam emitted from said semiconductor laser tip, said photodiode being disposed in a package of said laser driving integrated circuit.
Claim 8
Dependent Claim
25 words
A laser unit according to claim 1, further comprising a photodiode for receiving and monitoring a laser light beam emitted from said semiconductor laser tip.
Claim 9
Dependent Claim
39 words
A laser unit according to claim 7, wherein said base includes one of a step portion and a cut-away portion at a laser-light-emission end of said base, and wherein said photodiode is disposed at said step or cut-away portion.
Claim 10
Dependent Claim
90 words
A laser scanning apparatus comprising: a laser unit, said laser unit comprising a semiconductor laser tip, a laser driving integrated circuit for driving said semiconductor laser tip, a condenser lens for condensing a laser light beam emitted by said semiconductor laser tip, said laser driving integrated circuit and said condenser lens being mounted to said base, wherein said base contains a hollow portion therein, and wherein said semiconductor laser tip is mounted in said hollow portion and sealed therein; and scanning means for deflectively scanning the condensed laser light beam.
Claim 11
Dependent Claim
90 words
A laser scanning apparatus comprising: a laser unit, said laser unit comprising a semiconductor laser tip, a laser driving integrated circuit for driving said semiconductor laser tip, a condenser lens for condensing a laser light beam emitted by said semiconductor laser tip, said laser driving integrated circuit and said condenser lens being mounted to said base, wherein said base contains a hollow portion therein, and wherein said semiconductor laser tip is mounted in said hollow portion and sealed therein; and scanning means for deflectively scanning the condensed laser light beam.
Claim 12
Dependent Claim
16 words
A laser scanning apparatus according to claim 9, wherein said condenser lens comprises a collimator lens.
Claim 13
Dependent Claim
15 words
A laser scanning apparatus according to claim 9, wherein said base comprises a metal member.
Claim 14
Dependent Claim
28 words
A laser scanning apparatus according to claim 9, wherein said base includes one of a step portion and a cut-away portion at a laser-light-emission end of said base.
Claim 15
Dependent Claim
24 words
A laser scanning apparatus according to claim 9, wherein said condenser lens is fixed to said base using an adhesion of ultraviolet hardening resin.
Claim 16
Dependent Claim
39 words
A laser scanning apparatus according to claim 9, further comprising a photodiode for receiving and monitoring a laser light beam emitted from said semiconductor laser tip, said photodiode being disposed in a package of said laser driving integrated circuit.
Claim 17
Dependent Claim
26 words
A laser scanning apparatus according to claim 9, further comprising a photodiode for receiving and monitoring a laser light beam emitted from said semiconductor laser tip.
Claim 18
Dependent Claim
40 words
A laser scanning apparatus according to claim 15, wherein said base includes one of a step portion and a cut-away portion at a laser-light-emission end of said base, and wherein said photodiode is disposed at said step or cutaway portion.
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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) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |