US4884884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treatment of the eye with the use of a laser
Assignee: G Rodenstock Instrumente GmbH
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Filing: 1987-06-20
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Granted: 1989-12-05
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Expires: 2007-06-20
Abstract
Abstract Described is an apparatus for treatment of the eye with the use of a laser, the beam of which can be projected onto the area of the eye to be treated. An inventive element is that there is positioned in the beam path of the laser at least one beam multiplier, which divides the beam into at least two sub-beams, which are arranged in a specific spacial relationship to each other and which are jointly projected onto the area of the eye to be treated. The beam multiplier provided in accordance with the present invention has the advantage that the treatment time is reduced by a factor, equaling the number of individual sub-beams.
Inventors
- 👤 Werner Reis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:21
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/008; A61F2009/00861; A61F2009/00872
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
An apparatus for treatment of an eye with a laser comprising imaging means for focusing a laser beam onto an area of the eye to be treated, and at least one beam multiplier positioned in the path of the laser beam for treatment of the eye, the at least one beam multiplier splitting the laser beam into at least two sub-beams having a predetermined spacial relationship to one another, the imaging means focusing the at least two sub-beams as at least two individual mutually spaced laser beam spots on the area of the eye to be treated.
Claim 2
Independent Claim
97 words
An apparatus for treatment of an eye with a laser comprising imaging means for focusing a laser beam onto an area of the eye to be treated, and at least one beam multiplier positioned in the path of the laser beam for treatment of the eye, the at least one beam multiplier splitting the laser beam into at least two sub-beams having a predetermined spacial relationship to one another, the imaging means focusing the at least two sub-beams as at least two individual mutually spaced laser beam spots on the area of the eye to be treated.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein said beam multiplier is a prism plate.
Claim 4
Dependent Claim
29 words
An apparatus according to claim 2, wherein said prism plate has a plurality of prisms that are placed one after the other into the path of the laser beam.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 2 or 3, wherein said prism plate permits passage of one undeflected sub-beam.
Claim 6
Dependent Claim
36 words
An apparatus according to claim 2 or 3, wherein the individual prisms of the beam multiplier or multipliers have the shape of a section of a circle and are arranged side by side forming a circle.
Claim 7
Dependent Claim
33 words
An appratus according to claim 1, wherein said beam multiplier is positioned in a part of the path of the laser, in which said laser beam beam is conducted as a parallel beam.
Claim 8
Dependent Claim
17 words
An appratus according to claim 1, wherein the individual laser beam spots are at least partially superimposed.
Claim 9
Dependent Claim
19 words
An apparatus according to claim 1, wherein a plurality of different beam multipliers are arranged on a Recoss plate.
References Cited (Backward Citations)
GB2149142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |