Patent ID: 6852981

Claim:
An ultraviolet radiation measurement device for obtaining a dosage level and an intensity level of ultraviolet radiation from an ultraviolet radiation source directed at an irradiation target, the device comprising: a measurement sensor having: a first end; an opposed second end; a light pathway formed between the first and second ends; an internal light guide positioned along the light pathway adjacent the first end; an external light guide chamber formed along the light pathway adjacent the second end and extending toward the internal light guide, the external light guide chamber being sized and configured to receive an external light guide therein; an electric charge generating unit positioned adjacent the light pathway, the electric charge generating unit being sized and configured to be irradiated by the ultraviolet radiation source via the light pathway during irradiation of the target and to convert the ultraviolet radiation into an electric charge proportional to the ultraviolet radiation; an electric charge storage unit electrically connected in parallel with the electric charge generating unit and operable to store the electric charge produced thereby; and a resistive member selectively electrically connectable in parallel with the electric charge storage unit and operable to dissipate the electric charge from the electric charge storage unit during irradiation by the ultraviolet radiation when connected to the storage unit; and an electrometric unit electrically connected to the electric charge storage unit, the electrometric unit being configured to receive the electric charge and operable to selectively output a reading corresponding to the dosage level and the intensity level of the ultraviolet radiation being directed at the irradiation target.