ILLUMINATION DEVICE FOR ILLUMINATING AN ILLUMINATION AREA

• US 20150345746A1
• Filed: 12/19/2013
• Published: 12/03/2015
• Est. Priority Date: 12/24/2012
• Status: Active Grant

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Drager Medical GmbH (FPS Vermögensverwaltung GmbH)
• Inventors: FORNASIERO, Livio, KRETSCHMANN, Hanno
• Granted Patent: US 9,869,451 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F21V 13/14 the elements being filters or photoluminescent elements, reflectors and refractors
• CPC Class Codes: F21V 19/02 with provision for adjustment, e.g. for focusing
• CPC Class Codes: F21V 9/06 for filtering out ultraviolet radiation
• CPC Class Codes: F21V 9/30 Elements containing photoluminescent material distinct from or spaced from the light source shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40
• CPC Class Codes: F21V 9/45 by adjustment of photoluminescent elements
• CPC Class Codes: F21W 2131/20 Lighting for medical use
• CPC Class Codes: F21W 2131/205 for operating theatres
• CPC Class Codes: F21Y 2113/10 of different colours

Abstract

An illuminating device (10) for illuminating an illuminated area (110), especially an operating area, has at least one light source (20) with at least one laser (22) for the emission of laser light (L) and at least one exciting medium (30). The exciting medium is excited while absorbing at least part of the laser light (L) and emits emission light (E) of a wavelength that differs at least partly from the wavelength of the laser light (L).

Claims

1. An illuminating device for illuminating an illuminated area, the illuminating device comprising at least one light source comprising:

at least one laser for the emission of laser light; and

at least one exciting medium, which is excited while absorbing at least one part of the laser light and emits emission light of a wavelength that differs at least partly from the wavelength of the laser light, wherein the exciting medium is designed such that the exciting medium scatters a non-absorbed part of the laser light and at least partially destroys the spatial coherence thereof.

2. An illuminating device in accordance with claim 1, wherein the exciting medium is designed to emit a spectrum of different frequencies, especially in the form of a frequency band, as an emission light during excitation by the laser light.

3. An illuminating device in accordance with claim 1, wherein the at least one light source further comprises at least one optical component arranged such that the optical component guides the laser light onto the exciting medium.

4. An illuminating device in accordance with claim 3, wherein the at least one of the optical component comprises at least one of:

a reflector;

a diaphragm;

an optical light guide;

a lens; and

a diffractive optical system.

5. An illuminating device in accordance with claim 3, wherein the at least one optical component comprises an optical light guide comprised of the exciting medium at least partly.

6. An illuminating device in accordance with claim 1, wherein the exciting medium has at least two excitation sections, which emit mutually different spectra of emission light while absorbing the laser light.

7. An illuminating device in accordance with claim 6, wherein that the exciting medium is arranged movably in the illuminating device to move one of the excitation sections into the focus of the laser light.

8. An illuminating device in accordance with claim 1, wherein the light source further comprises at least one additional laser such that the light source has at least two lasers, which emit laser light with different wavelengths.

9. An illuminating device in accordance with claim 1, wherein the laser and/or the exciting medium is designed for the emission of laser light and/or emission light with a UV component in a frequency and with an energy that are suitable for the disinfection of the illuminated area.

10. A lighting fixture for an operating room for illuminating an illuminated area in the form of an operating area, the lighting fixture comprising at least one illuminating device comprising a light source comprising:

a laser source emitting laser light; and

an exciting medium receiving the emitted laser light and absorbing a portion of the laser light and emitting emission light of a wavelength that differs at least partly from a wavelength of the laser light, the exciting medium scattering a non-absorbed portion of the laser light and at least partially destroying a spatial coherence of the scattered non-absorbed portion of the laser light.

11. A lighting fixture for an operating room in accordance with claim 10, further comprising another illuminating device to provide a plurality of illuminating devices arranged movably in relation to one another.

12. A lighting fixture in accordance with claim 11, wherein the exciting medium emits a spectrum, upon excitation by laser light, of different frequencies in a form of an emission light frequency band.

13. A lighting fixture in accordance with claim 11, wherein the light source further comprises an optical component guiding laser light to the exciting medium.

14. A lighting fixture in accordance with claim 13, wherein the optical component comprises at least one of:

a reflector;

a diaphragm;

an optical light guide;

a lens; and

a diffractive optical system.

15. A lighting fixture in accordance with claim 13, wherein the optical component comprises an optical light guide comprised of at least some of the exciting medium.

16. A lighting fixture in accordance with claim 11, wherein the exciting medium comprises a first excitation section and a second excitation section and the first excitation section and the second excitation section emit mutually different spectra of emission light upon absorbing laser light.

17. A lighting fixture in accordance with claim 16, wherein the exciting medium is arranged movably whereby the first excitation section and the second excitation section may be selectively positioned for absorbing laser light.

18. A lighting fixture in accordance with claim 11, wherein the light source further comprises an additional laser, wherein the laser and the additional laser emit laser light with different wavelengths.

19. A lighting fixture in accordance with claim 11, wherein at least one of the laser and the exciting medium provide an emission of at least one of laser light and emission light with a UV component in a frequency and with an energy for a disinfection of an illuminated area.

20. An operating area illuminating device comprising a light source, the light source comprising:

a laser source emitting laser light, the laser source comprising a laser;

an emission component comprising an exciting medium, the laser source being operatively connected with the emission component to excite the exciting medium, with an absorption of laser light, to emit emission light of wavelengths that differs at least partly from a wavelength of the laser light, the emission component scattering non-absorbed laser light and at least partially destroying a spatial coherence of non-absorbed laser light.