US5359173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning technique for laser ablation
Assignee: Bausch and Lomb Inc
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Filing: 1993-06-22
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Granted: 1994-10-25
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Expires: 2013-06-22
Abstract
Abstract Improved methods of modifying target surfaces through ablation are disclosed resulting in a reduction of debris redeposition on the target surface.
Inventors
- 👤 Kenneth L. Opdyke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:28
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/36; B23K26/361; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/13334; G11; G11C; G11C11/00; G11C11/21; G11C11/26; G11C11/28; B23K2103/00; B23K2103/30; B23K2103/42; B23K2103/50
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
113 words
A method for photoablating a target surface comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area on the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to a first edge of the target surface; c) rotating the target in increments; d) returning the beam to said predetermined initial scanning area on the target surface; e) scanning the beam in a direction away from said predetermined initial scanning area to the edge opposing said first edge of said target surface; and repeating steps c), d) and e) in sequence such that the entire target surface is scanned.
Claim 2
Independent Claim
113 words
A method for photoablating a target surface comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area on the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to a first edge of the target surface; c) rotating the target in increments; d) returning the beam to said predetermined initial scanning area on the target surface; e) scanning the beam in a direction away from said predetermined initial scanning area to the edge opposing said first edge of said target surface; and repeating steps c), d) and e) in sequence such that the entire target surface is scanned.
Claim 3
Independent Claim
105 words
A method for photoablating a target surface comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area of the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to a first edge of the target surface; c) rotating the target 180 degrees; d) returning the beam to said predetermined initial scanning area of the target surface; and e) scanning the beam in a direction away from said predetermined initial scanning area to the edge opposing said first edge of said target surface, such that the entire target surface is scanned.
Claim 4
Independent Claim
105 words
A method for photoablating a target surface comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area of the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to a first edge of the target surface; c) rotating the target 180 degrees; d) returning the beam to said predetermined initial scanning area of the target surface; and e) scanning the beam in a direction away from said predetermined initial scanning area to the edge opposing said first edge of said target surface, such that the entire target surface is scanned.
Claim 5
Dependent Claim
18 words
The method of claim 2 wherein said beam of pulsed UV radiation is emitted from an excimer laser.
Claim 6
Dependent Claim
16 words
The method of claim 2 wherein said target surface is comprised of a crosslinked polymeric material.
Claim 7
Dependent Claim
13 words
The method of claim 2 wherein said target surface is a thermoset material.
Claim 8
Dependent Claim
13 words
The method of claim 2 wherein said target surface is a thermoplastic material.
Claim 9
Dependent Claim
27 words
The method of claim 2 wherein the fluence of said beam of pulsed UV radiation is from about 20 mJ/cm 2 to about 5000 mJ/cm 2 .
Claim 10
Dependent Claim
17 words
The method of claim 2 wherein the fluence of said beam is about 1 J/cm 2 .
Claim 11
Dependent Claim
15 words
The method of claim 2 wherein said predetermined initial scanning area is a bisecting line.
Claim 12
Dependent Claim
12 words
The method of claim 2 wherein said target is a contact lens.
Claim 13
Independent Claim
93 words
A method for photoablating a target surface comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area of the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to a first edge of the target surface; c) inactivating said beam; d) returning the beam to the predetermined initial scanning area; e) reactivating said beam; and f) scanning said beam in the direction directly opposite the scan made in step b) such that the entire target surface is scanned.
Claim 14
Independent Claim
93 words
A method for photoablating a target surface comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area of the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to a first edge of the target surface; c) inactivating said beam; d) returning the beam to the predetermined initial scanning area; e) reactivating said beam; and f) scanning said beam in the direction directly opposite the scan made in step b) such that the entire target surface is scanned.
Claim 15
Dependent Claim
106 words
A modified target surface prepared by ablative photodecomposition comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area of the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to the edge of the target surface; c) rotating the target 180 degrees; d) returning the beam to the predetermined initial scanning area of the target surface; and e) scanning the beam in a direction away from said predetermined initial scanning area to the edge opposing the said first edge of said target surface, such that the entire target surface is scanned.
Claim 16
Dependent Claim
106 words
A modified target surface prepared by ablative photodecomposition comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area of the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to the edge of the target surface; c) rotating the target 180 degrees; d) returning the beam to the predetermined initial scanning area of the target surface; and e) scanning the beam in a direction away from said predetermined initial scanning area to the edge opposing the said first edge of said target surface, such that the entire target surface is scanned.
Claim 17
Dependent Claim
26 words
The target surface of claim 12 wherein said target surface is a means capable of imparting optical properties or surface geometries characteristics on a second surface.
Claim 18
Dependent Claim
13 words
The method of claim 12 wherein said target surface is a contact lens.
Claim 19
Dependent Claim
114 words
A corneal target surface modified by ablative photodecomposition comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area of the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to a first edge of the target surface; c) inactivating the beam; d) returning the beam to the predetermined initial scanning area of the target surface; and e) scanning the beam in a direction directly opposite from the direction of the scan in step b) from said predetermined initial scanning area to the edge opposing said first edge of said target surface, such that the entire target surface is scanned.
Claim 20
Dependent Claim
114 words
A corneal target surface modified by ablative photodecomposition comprising the steps of: a) directing a beam of pulsed UV radiation at a predetermined initial scanning area of the target surface; b) scanning said beam in a direction away from said predetermined initial scanning area to a first edge of the target surface; c) inactivating the beam; d) returning the beam to the predetermined initial scanning area of the target surface; and e) scanning the beam in a direction directly opposite from the direction of the scan in step b) from said predetermined initial scanning area to the edge opposing said first edge of said target surface, such that the entire target surface is scanned.
Claim 21
Dependent Claim
15 words
The method of claim 1 wherein said predetermined initial scanning area is a bisecting line.
Claim 22
Dependent Claim
15 words
The method of claim 11 wherein said predetermined initial scanning area is a bisecting line.
Claim 23
Dependent Claim
17 words
The modified target surface of claim 12 wherein said predetermined initial scanning area is a bisecting line.
Claim 24
Dependent Claim
16 words
The corneal surface of claim 15 wherein said predetermined initial scanning area is a bisecting line.
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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) | 1997-10-24 | 1998-04-25 | 1998-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-24 | 2002-04-25 | 2002-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-24 | 2006-04-25 | 2006-10-25 | $7700.00 | Window Closed / Lapsed |