US5287380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for generating long output pulses from flashlamp-excited lasers
Assignee: Candela Corp
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Filing: 1993-02-19
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Granted: 1994-02-15
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Expires: 2013-02-19
Abstract
Abstract A flashlamp-excited laser for producing a pulsed beam of laser light of long duration (e.g., greater than 500 microseconds) comprises a flashlamp driven by a pulse forming circuit which generates a ramp pulse having an amplitude generally increasing with time during substantially the entire duration of the pulsed beam of laser light produced by the laser.
Inventors
- 👤 James C. Hsia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:06
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/203; A61B2018/00315; A61B2018/00452; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
56 words
A method of generating a pulsed beam of laser light of long duration from a flashlamp-excited laser, comprising: generating a ramp pulse having an amplitude which generally increases with time during substantially the entire duration of a pulsed beam of laser light produced by a flashlamp-excited laser, and driving the flashlamp-excited laser with the ramp pulse.
Claim 2
Independent Claim
56 words
A method of generating a pulsed beam of laser light of long duration from a flashlamp-excited laser, comprising: generating a ramp pulse having an amplitude which generally increases with time during substantially the entire duration of a pulsed beam of laser light produced by a flashlamp-excited laser, and driving the flashlamp-excited laser with the ramp pulse.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the duration of the pulsed beam of laser light is greater than 500 microseconds.
Claim 4
Dependent Claim
33 words
The method of claim 1 wherein the amplitude of the ramp pulse increases by a factor of about 2 or greater during substantially the entire duration of the pulsed beam of laser light.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein the pulsed beam of laser light has an energy level of about 0.5 Joules or greater.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein the flashlamp-excited laser is used to treat cutaneous vascular lesions.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein a lasing medium associated with the flashlamp-excited laser comprises a dye carried by a liquid.
Claim 8
Independent Claim
60 words
A method of generating a pulsed beam of laser light of long duration, comprising: providing a flashlamp-excited dye laser for producing a pulsed beam of laser light, generating a ramp pulse having an amplitude which generally increases with time during substantially the entire duration of the pulsed beam of laser light, and driving the flashlamp-excited laser with the ramp pulse.
Claim 9
Independent Claim
60 words
A method of generating a pulsed beam of laser light of long duration, comprising: providing a flashlamp-excited dye laser for producing a pulsed beam of laser light, generating a ramp pulse having an amplitude which generally increases with time during substantially the entire duration of the pulsed beam of laser light, and driving the flashlamp-excited laser with the ramp pulse.
Claim 10
Dependent Claim
51 words
A flashlamp-excited laser for producing a pulsed beam of laser light of long duration, comprising: a flashlamp driven by a pulse forming circuit which generates a ramp pulse having an amplitude generally increasing with time during substantially the entire duration of a pulsed beam of laser light produced by the laser.
Claim 11
Dependent Claim
51 words
A flashlamp-excited laser for producing a pulsed beam of laser light of long duration, comprising: a flashlamp driven by a pulse forming circuit which generates a ramp pulse having an amplitude generally increasing with time during substantially the entire duration of a pulsed beam of laser light produced by the laser.
Claim 12
Dependent Claim
21 words
The flashlamp-excited laser of claim 8 wherein a lasing medium associated with the laser comprises a dye carried by a liquid.
Claim 13
Dependent Claim
22 words
The flashlamp-excited dye laser of claim 9 wherein the duration of the pulsed beam of laser light is greater than 500 microseconds.
Claim 14
Dependent Claim
35 words
The flashlamp-excited dye laser of claim 10 wherein the amplitude of the ramp pulse increases by a factor of about 2 or greater during substantially the entire duration of the pulsed beam of laser light.
Claim 15
Dependent Claim
24 words
The flashlamp-excited dye laser of claim 11 wherein the pulsed beam of laser light has an energy level of about 0.5 Joules or greater.
Claim 16
Dependent Claim
17 words
The flashlamp-excited dye laser of claim 12 wherein the laser is used to treat cutaneous vascular lesions.
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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) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |