Patent ID: 9554101
Date: 2017-01-24
CPC Classifications: G02B,G03B,H04N

Claim:
1. An illumination apparatus, comprising: at least one electromagnetic excitation energy source to emit an excitation beam of a substantially Gaussian spatial distribution (“Gaussian excitation beam”) to include wavelengths in an excitation spectrum; an optical wavelength conversion element optically coupled to the electromagnetic excitation energy source, a portion of an emitting surface of the wavelength conversion element coated with at least one of a fluorescent phosphor or a reflective surface, the fluorescent phosphor to receive a top-hat spatially distributed excitation beam and to generate at least one fluoresced beam of photons of at least one fluoresced spectrum, the reflective surface to reflect the top-hat spatially distributed excitation beam, the fluoresced beam or the reflected beam to be generated with a predetermined periodicity during at least one predetermined period of time; a light pipe optically coupled to the excitation energy source to receive the Gaussian excitation beam, to re-distribute power across an area of the Gaussian excitation beam corresponding to a width of the Gaussian excitation beam in order to form a substantially top-hat spatially distributed excitation beam, the light pipe optically coupled to the wavelength conversion element to homogenize the fluoresced beam or the reflected Gaussian excitation beam; and a condensing and collimation optical element group optically coupled to the optical wavelength conversion element to direct the top-hat spatially distributed excitation beam to the wavelength conversion element and to direct the fluoresced beam or the reflected Gaussian excitation beam back to the light pipe.