Patent US5029243A successfully refreshed from Google Patents.
US5029243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for working a workpiece using laser light
Assignee: US Philips Corp
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Filing: 1989-09-14
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Granted: 1991-07-02
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Expires: 2009-09-14
Abstract
Abstract A device for working a workpiece by means of laser light includes a laser, a beamsplitter for splitting the laserbeam into at least two sub-laserbeams of substantially identical intensities, and a control unit which controls the light intensity of the laser and the movement of a workpiece support and the laserbeam relative to each other. The beamsplitter includes at least one digital-phase grating which divides the laserbeam into a plurality of sub-laserbeams to produce a pattern of laser spots onto the workpiece.
Inventors
- 👤 Hans Dammann
- 👤 Gert Rabe
- 👤 Paul J. Patt
- 👤 Christian H. F. Velzel
- 👤 Klaus B. Schildbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:50
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/067; B23K26/0676; B23K1/00; B23K1/005; B23K1/0056; H05K3/341; H05K3/3421; H05K3/3494
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
97 words
A device for working a workpiece using laser light, said device comprising: a laser for generating a laserbeam, a beam splitter for splitting the laserbeam into at least two sub-laserbeams of largely of identical intensity; a workpiece support for holding workpiece; and a control unit for controlling the intensity of the laser and the movement of said workpiece support and the laserbeam with respect to each other, characterized in that said beamsplitter comprises a digital-phase grating for dividing the laserbeam coming from the laser into a plurality of sub-laserbeams to produce a projection pattern on the workpiece.
Claim 2
Independent Claim
97 words
A device for working a workpiece using laser light, said device comprising: a laser for generating a laserbeam, a beam splitter for splitting the laserbeam into at least two sub-laserbeams of largely of identical intensity; a workpiece support for holding workpiece; and a control unit for controlling the intensity of the laser and the movement of said workpiece support and the laserbeam with respect to each other, characterized in that said beamsplitter comprises a digital-phase grating for dividing the laserbeam coming from the laser into a plurality of sub-laserbeams to produce a projection pattern on the workpiece.
Claim 3
Dependent Claim
42 words
A device as claimed in claim 1, characterized in that said beamsplitter comprises a first movable grating disc having at least two digital-phase gratings said grating disc being insertable in the path of the laser beam under control of said control unit.
Claim 4
Dependent Claim
43 words
A device as claimed in claim 2, characterized in that said beamsplitter comprises a first movable grating disc comprising a further digital-phase grating, and means for moving said further digital-phase grating under control of said control unit into the path of the sub-laserbeams.
Claim 5
Dependent Claim
18 words
A device as claimed in claim 3 further comprising a diaphragm movable into the path of the sub-laserbeams.
Claim 6
Dependent Claim
33 words
A device as claimed in claim 4, further comprising a rotatable diaphragm disc comprising a plurality of different diaphragms and means for selectively rotating said different diaphragms into the path of said sub-laserbeams.
Claim 7
Dependent Claim
37 words
A device as claimed in claim 5, characterized in that an optical deflection unit is provided comprising an array of mirrors for deflecting the sub-laserbeams to the workpiece at an oblique angle relative to said workpiece support.
Claim 8
Dependent Claim
18 words
A device as claimed in claim 2, further comprising a diaphragm movable into the path of the sub-laserbeams.
Claim 9
Dependent Claim
18 words
A device as claimed in claim 1, further comprising a diaphragm movable into the path of the sub-laserbeams.
Claim 10
Dependent Claim
37 words
A device as claimed in claim 4, characterized in that an optical deflection unit is provided comprising an array of mirrors for deflecting the sub-laserbeams to the workpiece at an oblique angle relative to said workpiece support.
Claim 11
Dependent Claim
37 words
A device as claimed in claim 3, characterized in that an optical deflection unit is provided comprising an array of mirrors for deflecting the sub-laserbeams to the workpiece at an oblique angle relative to said workpiece support.
Claim 12
Dependent Claim
37 words
A device as claimed in claim 2, characterized in that an optical deflection unit is provided comprising an array of mirrors for deflecting the sub-laserbeams to the workpiece at an oblique angle relative to said workpiece support.
Claim 13
Dependent Claim
37 words
A device as claimed in claim 1, characterized in that an optical deflection unit is provided comprising an array of mirrors for deflecting the sub-laserbeams to the workpiece at an oblique angle relative to said workpiece support.
Claim 14
Dependent Claim
27 words
A device as claimed in claim 1, wherein said beamsplitter comprises a second digital phase grating in the path of the sub-laserbeams which further divides the sub-laserbeams.
Claim 15
Dependent Claim
26 words
A device as claimed in claim 13, wherein said second phase grating and said first phase grating are shifted, in parallel planes, relative to each other.
Claim 16
Dependent Claim
17 words
A device as claimed in claim 14, further comprising a diaphragm in the path of said sub-laserbeams.
Claim 17
Dependent Claim
39 words
A method device as recited in claim 15, characterized in that the beamsplitter comprises a second movable grating disc having at least one further digital-phase grating insertable, under control of the control unit, into the path of the sub-laserbeams.
References Cited (Backward Citations)
US4257673A
Cited
US4327277A
Cited
US4322600A
Cited
US4748614A
Cited
US4720621A
Cited
US4792658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |