Patent ID: 7892268
Filing Date: 2011-02-22
Classification: A61B,A61N

Abstract:
1. An apparatus for directing light to an eye for exciting a photosensitizer comprising: a LED having a light output greater than or equal to 700 mW when driven with a current to provide therapy light having a first wavelength for exciting the photosensitizer to provide therapy; a compound parabolic concentrator having an acceptance angle that is less than or equal to 30°, the compound parabolic concentrator receiving light from the LED and directing light out with a smaller emission angle than the emission angle of the LED; one or more optics for receiving light from the compound parabolic concentrator and directing the light out of the apparatus; and a filter movable into the optical path of the LED light, the filter allowing a second wavelength of light to pass that will not excite the photosensitizer to provide therapy, the second wavelength of light providing diagnostic light or an aiming beam.