Apparatus for shaping of laser radiation

• US 8,422,148 B2
• Filed: 06/25/2008
• Issued: 04/16/2013
• Est. Priority Date: 07/03/2007
• Status: Expired due to Fees

• Current Assignee: LIMO Patentverwaltung GmbH & Co. KG
• Original Assignee: LIMO Patentverwaltung GmbH & Co. KG
• Inventors: Timmermann, Andre, Langer, Bjrn
• Primary Examiner(s): Dinh, Jack
• Application Number:
  US12/667,562
• Publication Number:
  US 20100165487A1
• Time in Patent Office: 1,756 Days
• Field of Search: 359/726, 359/639, 359/640, 359/742, 359/796
• US Class Current: 359/726
• CPC Class Codes: G02B 27/0972 Prisms prisms per se G02B5/04
• CPC Class Codes: H01S 5/4012 Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms

Abstract

A device for shaping laser radiation, in particular for laser radiation emitted by a laser diode bar, has at least one substrate with a plurality of refractive boundary surfaces through which the laser radiation to be produced can pass in such a way that at least two partial beams of the laser radiation, which, prior to their passage, are adjacently arranged in a first direction, are adjacently arranged after their passage through the refractive boundary surfaces in a second direction which is perpendicular to the first direction. The refractive boundary surfaces are formed at a substrate or at substrates that are connected to one another.

Claims

1. An apparatus for shaping laser radiation, the apparatus comprising:

a shaping substrate formed of one monolithic substrate or of a plurality of substrates connected to one another, said shaping substrate having a plurality of refractive boundary surfaces formed on said monolithic substrate or on said plurality of substrates;

said boundary surfaces being disposed to allow the laser radiation to be shaped to pass therethrough and said shaping substrate being formed to cause at least two partial beams of the laser radiation that are arranged alongside one another in a first direction prior to passing through said refractive boundary surfaces to be arranged alongside one another in a second direction after passing through said refractive boundary surfaces, wherein the second direction is perpendicular to the first direction.

2. The apparatus according to claim 1, wherein the laser radiation to be shaped is laser radiation emitted by a laser diode bar.

3. The apparatus according to claim 1, wherein at least one of said shaping substrate and said refractive boundary surfaces are configured and arranged such that at least one of the partial beams is allowed to pass through said substrate and through said refractive boundary surfaces substantially without being deflected.

4. The apparatus according to claim 1, wherein at least one of said shaping substrate and said refractive boundary surfaces are configured and arranged such that at least one of the partial beams is subject to at least one total internal reflection in an interior of said shaping substrate.

5. The apparatus according to claim 1, wherein said refractive boundary surfaces are planar surfaces.

6. The apparatus according to claim 1, wherein said monolithic substrate is formed to cause at least one of the partial beams to be subject only to total internal reflections after entering said substrate and until emerging from said substrate.

7. The apparatus according to claim 6, wherein the at least one partial beam is subject to four total internal reflections.

8. The apparatus according to claim 6, wherein said monolithic substrate is configured to define each of the total internal reflections to have a deflection angle of 90°

.

9. The apparatus according to claim 6, wherein an inlet surface and an outlet surface of said monolithic substrate are aligned parallel to one another.

10. The apparatus according to claim 1, wherein said shaping substrate comprises at least two substrates having said refractive boundary surfaces formed thereon, and wherein said at least two substrates are connected to one another.

11. The apparatus according to claim 10, wherein said at least two substrates are adhesively bonded to one another.

12. The apparatus according to claim 10, wherein said shaping substrate comprises three or five substrates having said refractive boundary surfaces formed thereon.

13. The apparatus according to claim 10, wherein said at least two substrates are configured and arranged such that at least one of the partial beams passes through only one of said substrates.

14. The apparatus according to claim 13, wherein the at least one partial beam passes through only one of said substrates substantially without being deflected.

15. The apparatus according to claim 10, wherein said at least two substrates are configured and arranged such that at least one of the partial beams passes through two substrates that are arranged one behind the other and are separated from one another, at least in places, in a propagation direction of the partial beam.

16. The apparatus according to claim 15, wherein one of said two substrates deflects the at least one partial beam with respect to the first direction, and the other of said two substrates deflects the at least one partial beam with respect to the second direction.

17. The apparatus according to claim 10, wherein said at least two substrates have planar surfaces.

18. The apparatus according to claim 17, wherein said at least two substrates have mutually parallel planar surfaces.

19. The apparatus according to claim 17, wherein said at least two substrates have a cuboid shape.