Optical waveguide

1. An optical waveguide, comprising:

a tubular or hose-type housing which has an input opening, an output opening and a center line extending from the input opening to the output opening; and

a series of transparent spheres in the interior of the housing lined up along the center line, wherein the housing is designed as a flexible hose and the spheres are spaced apart in the housing, and the guidance of the light takes place due to the refraction of a light beam when entering or exiting from the transparent spheres;

a spacing arrangement extending from the input opening to the output opening which provides a spacing between the spheres, and

wherein a helically wound projection is present as the spacing arrangement on the inside of the housing extending from the input opening to the output opening, with spacing of coils of the helically wound projection from each other being chosen so that the spheres are located between adjacent coils.

2. The optical waveguide as claimed in claim 1 , wherein the housing is made of metal.

3. The optical waveguide as claimed in claim 2 , wherein the spheres are polished quartz spheres.

4. The optical waveguide as claimed in claim 1 , wherein the spheres are polished quartz spheres.

5. The optical waveguide as claimed in claim 1 , wherein the spacing arrangement is established with a series of spacers arranged in the housing between the spheres.

6. The optical waveguide as claimed in claim 5 , wherein the spacers are designed as rings fixed to the inside of the housing.

7. The optical waveguide as claimed in claim 1 , wherein the input opening and/or output opening is closed by a transparent disk.

8. The optical waveguide as claimed in claim 7 , wherein the transparent disk is a quartz disk.

9. A burner, comprising:

an integral optical waveguide having a tubular or hose-type housing which has an input opening, an output opening and a center line extending from the input opening to the output opening, and transparent spheres in the interior of the housing lined up along the center line, wherein the housing is designed as a flexible hose and the spheres are spaced apart in the housing with a spacing arrangement extending from the input opening to the output opening to provide a spacing between the spheres, and the guidance of the light takes place due to the refraction of a light beam when entering or exiting from the transparent spheres, and

wherein a helically wound projection is present as the spacing arrangement on the inside of the housing of the integral optical waveguide extending from the input opening to the output opening, with spacing of coils of the helically wound projection from each other being chosen so that the spheres are located between adjacent coils.

10. The burner as claimed in claim 9 , wherein the integral optical waveguide is manufactured from a high-temperature resistant material.

11. The burner as claimed in claim 9 , wherein the housing of the integral optical waveguide is made of metal.

12. The burner as claimed in claim 9 , wherein the spheres of the integral optical waveguide are polished quartz spheres.

13. The burner as claimed in claim 9 , wherein the spacing arrangement comprises a series of spacers are arranged in the housing between the spheres of the integral optical waveguide.

14. The burner as claimed in claim 13 , wherein the spacers are designed as rings fixed to the inside of the housing.

15. The burner as claimed in claim 9 , wherein the input opening and/or output opening of the housing of the integral optical waveguide is closed by a transparent disk.

16. The burner as claimed in claim 15 , wherein the transparent disk is a quartz disk.