Abstract: The present invention provides a method and apparatus for sanitizing air within a ventilation system using ultraviolet light. The air is exposed to the ultraviolet light for a preselected duration of time and at a desired power level to achieve a desired level of sanitization.

Abstract: An ultraviolet sterilizer for use during surgery is mounted in a base cabinet. The UV light source can be a laser, or an LED. An optical frequency multiplier can be used that outputs UV of less than 280 nm, or greater than 320 nm, to avoid burning the patient. A visible LED aiming light directs the UV light toward the surgery. A crosshair image can be projected to position the light. One lamp has a housing, a cavity, a handle, and an ocular plate to pass the UV and the aiming light. An articulated arm allows selective positioning of the lamp. Another lamp has a stylus, a handle, and a tip small enough for easy insertion into a small incision for arthroscopy. A fiber optic cable connects the UV and the aiming light to the lamp. Lenses or filters can be used with the fiber optic cable. An electronic power supply and a CPU connect to the UV and the aiming light sources. A keyboard inputs commands to the CPU. A sensor provides feedback. Another UV sterilizer is mounted on a ceiling of the operating room.