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US 2013/0170806 A1Published application
Device for homogenizing a laser-beam profile
AssigneeCarl Zeiss Meditec AG
InventorsRene Denner, Manfred Dick, Jenny Duenger, Gerald Kunath-Fandrei
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Abstract
A device for homogenizing a laser-beam profile and a method for focussing and homogenizing a laser beam in laser photocoagulation for coagulating organic tissue, for example in the eye of a living organism.
Claims20
1:
- A device for homogenizing a laser-beam profile and for focussing a laser spot, the device comprising:
- an optical waveguide including a fiber core,
- wherein an edge of a cross-section of the fiber core comprises a straight section.
2:
- The device of claim 1, wherein the cross-section comprises a plurality of straight sections which are linked together and form an n-angular fiber core cross-section.
3:
- The device of claim 1, further comprising:
- a microoptically active structure provided on an irradiation surface of the optical waveguide.
4:
- The device of claim 1, wherein the optical waveguide is arranged in a specific pattern.
5:
- The device of claim 4, wherein the pattern comprises a loop.
6:
- The device of claim 5, wherein the loop has a loop size measuring 70 mm×80 mm.
7:
- The device of claim 1, further comprising:
- an external bending mechanism configured to bend the optical waveguide.
8:
- The device of claim 7, wherein the external bending mechanism is a mechanical vibration system comprising at least one of a spring-mass system, magnetic drive, connecting-rod drive, and a piezo actuator.
9:
- The device of claim 7, wherein the bending mechanism is configured to bend the optical waveguide at a repetition rate of from 1 to 10 kHz.
10:
- The device of claim 2, wherein the straight sections form a square fiber core cross-section.
11:
- The device of claim 5, wherein the loop has a loop size measuring 100 mm×160 mm.
12:
- The device of claim 8, wherein the external bending mechanism comprises a spring-mass system.
13:
- The device of claim 8, wherein the external bending mechanism comprises a magnetic drive.
14:
- The device of claim 8, wherein the external bending mechanism comprises a connecting-rod drive.
15:
- The device of claim 8, wherein the external bending mechanism comprises a piezo actuator.
16:
- The device of claim 8, wherein the external bending mechanism comprises a spring-mass system and a magnetic drive.
17:
- The device of claim 8, wherein the external bending mechanism comprises a spring-mass system and a connecting-rod drive.
18:
- The device of claim 8, wherein the external bending mechanism comprises a spring-mass system and a piezo actuator.
19:
- The device of claim 8, wherein the external bending mechanism comprises a magnetic drive and a connecting-rod drive.
20:
- The device of claim 8, wherein the external bending mechanism comprises a magnetic drive and a piezo actuator.