Irradiation appliance
View Patent ↗The invention relates to a radiation device that includes a housing, a light-emitting unit and a light-absorbing unit which is provided with an inlet opening and a reflector element. The reflector element extends across the entire distance between the light-emitting unit and the inlet opening of the light-absorbing unit.
1. An irradiation appliance, having:
a housing;
a single light-emitting unit which is arranged in the housing;
a light-receiving unit comprising an optical wave guide and having an inlet opening; and
a reflector element having an inner surface in the shape of a truncated cone,
wherein the reflector element extends over the entire distance between the light-emitting unit and the inlet opening of the light-receiving unit and has a smaller and a larger opening;
wherein the smaller opening faces the light-emitting unit, and the larger opening faces the light-receiving unit; and
wherein the reflector element has an aperture angle that decreases in size from the smaller opening to the larger opening.
2. The irradiation appliance as claimed in claim 1 , wherein the larger opening has a diameter that is less than or equal to that of the light-receiving unit.
3. The irradiation appliance as claimed in claim 1 , wherein the smaller opening at least partially surrounds the light-emitting unit.
4. The irradiation appliance as claimed in claim 1 , wherein the distance between the light-emitting unit and the light-receiving unit is greater than half the diameter of the light-receiving unit.
5. The irradiation appliance as claimed in claim 1 , wherein the length of the reflector element is greater than the distance between the light-emitting unit and the light-receiving unit.
6. The irradiation appliance as claimed in claim 1 , wherein the larger opening in the reflector element is covered by an optical protective glass.
7. The irradiation appliance as claimed in claim 6 , wherein the optical protective glass has blooming on one or both faces.
8. The irradiation appliance as claimed in claim 1 , wherein the reflector element is reflective on the inside.
9. The irradiation appliance as claimed in claim 8 , wherein the inner surface of the truncated cone is metallically mirrored or is formed from a sheet with high optical reflection.
10. The irradiation appliance as claimed in claim 9 , wherein the sheet is composed of a metal with good reflection characteristics, or is coated with such a metal.
11. The irradiation appliance as claimed in claim 9 , wherein the sheet is a metal-free, multilayer interference reflector sheet.
12. The irradiation appliance as claimed in claim 1 , wherein the light-emitting unit is a blue high-power light-emitting diode, comprising at least one light-emitting element whose size is at least 0.25 mm 2 , and the unit produces a radiation power between 100 and 1400 mW.
13. The irradiation appliance as claimed in claim 12 , wherein the at least one light-emitting element size is between 1 and 5 mm 2 , and the radiation power is between 200 and 800 mW.
14. The irradiation appliance as claimed in claim 1 , wherein the light-emitting unit is thermally connected to the housing.
15. The irradiation appliance as claimed in claim 14 , wherein the housing is composed entirely or partially of a material of high thermal conductivity and thermal capacity.
16. The irradiation appliance as claimed in claim 15 , wherein the housing is composed entirely or partially of aluminum, zinc or brass.
17. The irradiation appliance as claimed in claim 15 , wherein the light-emitting unit is additionally thermally connected to an element having a thermal capacity between 10 and 100 Joule/Kelvin.
18. The irradiation appliance as claimed in claim 17 , wherein the thermal capacity is between 20 and 50 Joule/Kelvin.
19. The irradiation appliance as claimed in claim 1 , wherein the light-emitting element is mounted on a planar holding plate of high thermal conductivity.
20. The irradiation appliance as claimed in claim 1 , wherein the light-receiving element is selected from a rigid optical waveguide rod or a flexible optical waveguide.
21. An irradiation appliance, having:
a housing;
a single light-emitting unit which is arranged in the housing;
a light-receiving unit comprising an optical wave guide and having an inlet opening; and
a reflector element which extends over the entire distance between the light-emitting unit and the inlet opening of the light-receiving unit and has a smaller and a larger opening, and an inclination angle v;
wherein the smaller opening faces the light-emitting unit, and the larger opening faces the light-receiving unit; and
wherein the inclination angle v of the reflector element follows the relationship:
v = 0.5×(δ−α)
where δ is a maximum emission angle at which light beams intended to be injected into the optical waveguide leave the light-emitting unit, and α is an acceptance angle of the optical waveguide.
22. The irradiation appliance as claimed in claim 21 , wherein δ is less than or equal to 65°.
23. The irradiation appliance as claimed in claim 1 , wherein the reflector element deflects only light beams emitted from the light-emitting unit that have an emission angle that is greater than a maximum injection angle of the light receiving unit.
24. The irradiation appliance as claimed in claim 23 , wherein the maximum injection angle of the light receiving unit is ±30°.
25. The irradiation appliance as claimed in claim 1 , wherein light beams having an emission angle less than or equal to the maximum injection angle of the light-receiving unit completely illuminate the inlet opening of the light-receiving unit.