US4336439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for laser scribing and cutting
Assignee: Coherent Inc
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Filing: 1980-10-02
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Granted: 1982-06-22
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Expires: 2000-10-02
Abstract
Abstract A laser system adapted for a high power laser beam thermally reacting with a target of a rigid material to remove a portion of the rigid material, has a laser generating a high power beam of electromagnetic coherent radiation. The beam is aligned to impinge the material and is controlled by a controlling means such that the portion removed is symmetrically shaped.
Inventors
- 👤 Michael W. Sasnett
- 👤 Richard J. Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:36
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/36; B23K26/362; B23K26/364; B23K26/02; B23K26/06; B23K26/064; B23K26/0643; B23K26/0665; B23K26/40; B23K2103/00; B23K2103/50
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
65 words
An apparatus adapted for removing a portion of a rigid material by thermal reaction, said apparatus comprising: laser means for generating a high power beam of electromagnetic coherent radiation characterized by a state of polarization; means for aligning said beam to impinge said material; and means for controlling the polarization of said beam with respect to said material wherein said portion removed is symmetrically shaped.
Claim 2
Independent Claim
65 words
An apparatus adapted for removing a portion of a rigid material by thermal reaction, said apparatus comprising: laser means for generating a high power beam of electromagnetic coherent radiation characterized by a state of polarization; means for aligning said beam to impinge said material; and means for controlling the polarization of said beam with respect to said material wherein said portion removed is symmetrically shaped.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1 wherein said controlling means comprises: polarizing means for linearly polarizing said beam; quarter-wave means; and said linearly polarized beam aligned to traverse a path through said quarter-wave means to produce a circularly polarized beam.
Claim 4
Dependent Claim
19 words
The apparatus of claim 2 wherein said aligning means comprises: focusing means for focussing said beam onto said target.
Claim 5
Dependent Claim
25 words
The system of claim 3 wherein said quarter-wave means has at least one reflecting surface and said path includes impinging and reflecting from said surface.
Claim 6
Dependent Claim
51 words
The system of claim 4 wherein said quarter-wave means further comprises: a plurality of reflecting means, each reflecting means having an angle of retardation; the sum of the angle of retardation of all the reflecting means is substantially ninety degrees; and said path includes impinging each reflecting means and reflecting therefrom.
Claim 7
Dependent Claim
23 words
The system of claim 5 wherein said quarter-wave means comprises two reflecting means each having an angle of retardation of substantially forty-five degrees.
Claim 8
Dependent Claim
45 words
The system of claim 4 wherein said reflecting means comprises: a substrate; a plurality of first dielectric material; a plurality of second dielectric material; said first and second dielectric materials being different; and said first and second dielectric materials on said substrate in alternate layers.
Claim 9
Dependent Claim
10 words
The system of claim 7 wherein said substrate is metal.
Claim 10
Dependent Claim
24 words
The system of claim 8 wherein said first dielectric material is a material selected from the group consisting of Ge and TiO 2 .
Claim 11
Dependent Claim
26 words
The system of claim 9 wherein said second dielectric material is a material selected from the group consisting of ZnS, ThF 4 and SiO 2 .
Claim 12
Dependent Claim
11 words
The system of claim 6 further comprising zero phase shift means.
Claim 13
Dependent Claim
27 words
The system of claim 11 wherein said zero phase shift means comprises: a reflecting means and said beam is incident thereon at near normal angle of incidence.
Claim 14
Dependent Claim
43 words
The system of claim 11 wherein said zero phase shift means comprises: two reflecting means, each having equal but opposite amount of angle of retardation; and said beam aligned to impinge both of said reflecting means, one after another, and to reflect therefrom.
Claim 15
Independent Claim
72 words
A method of thermally reacting a high power beam of coherent electromagnetic radiation with a target of a rigid material said method comprising: generating a high power beam of coherent electromagnetic radiation; directing said beam along a path through a controlling means to impinge said material; thermally reacting said beam with said material to remove a portion therefrom; and controlling said beam with said means wherein said portion removed is symmetrically shaped.
Claim 16
Independent Claim
72 words
A method of thermally reacting a high power beam of coherent electromagnetic radiation with a target of a rigid material said method comprising: generating a high power beam of coherent electromagnetic radiation; directing said beam along a path through a controlling means to impinge said material; thermally reacting said beam with said material to remove a portion therefrom; and controlling said beam with said means wherein said portion removed is symmetrically shaped.
Claim 17
Dependent Claim
18 words
The method of claim 14 wherein said controlling step further comprises: generating a circularly polarized beam of radiation.
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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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |