Laser based illumination device, and vehicle headlamp with such laser based illumination device

Abstract

An illumination device comprises at least a laser () emitting a laser beam () of light of a first wavelength, a wavelength converting member () converting at least part of the light of the first wavelength into light of a second wavelength, a scanning unit () adapted to scan the laser beam () across the wavelength converting member () and an imaging optics () imaging a light emitting face of the laser () via the scanning unit () onto the wavelength converting member (). In the proposed device, the laser beam () is guided via reflection at a reflective member () to the wavelength converting member (). The reflective member () comprises a combination of at least a first and a second reflective element (), wherein the first and second reflective elements () are formed and arranged such that the light emitting face of the laser () is imaged as a mirror-inverted image on the wavelength converting member () via the first reflective element () and as a non-mirror-inverted image via the second reflective element (), both images being superimposed on the wavelength converting member (). Due to this reflective member, intensity fluctuations in the image of the light emitting face on the wavelength converting member are reduced without enlarging the image.