A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
A61N 5/06 (2006.01)
Patent
CA 2108654
An illuminator for photodynamic therapy includes a bulb, a condenser lens assembly and a filter assembly. The filter assembly includes the following components in an optical path: (1) a high-pass filter to filter out light having wavelengths below a first wavelength value; (2) a low-pass dichroic filter to filter out light having wavelengths above a second wavelength value; and (3) a dichroic mirror which reflects light having wavelengths between the first wavelength value and the second wavelength value and which transmits infrared light. An exit lens assembly directs light transmitted through the high-pass filter and the low-pass dichroic filter and reflected by the dichroic mirror onto a patient for photodynamic therapy. The condenser lens assembly and the exit lens assembly scramble the beam to ensure that the patient is illuminated with light which is highly uniform in both intensity sand spectral characteristics (color) throughout the illuminated area.
Zarate Carlos E.
Zarate H. Graciela
Dusa Pharmaceuticals Inc.
Mccarthy Tetrault Llp
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