Patent ID: 6911657

Claim:
An apparatus for irradiating an object with ultraviolet radiation comprising: (a) a housing having a top wall and an internal chamber; (b) a source of ultraviolet radiation disposed within said chamber for emitting ultraviolet light at a first wavelength; (c) an ultraviolet radiation transmitting, light blocking element carried by said top wall of said housing; (d) a first phosphor plate fixedly mounted within said housing between said source of ultraviolet radiation and said ultraviolet radiation transmitting, light blocking element for converting short wave ultraviolet radiation to midrange ultraviolet radiation; (e) a short wave ultraviolet filter superimposed over said first phosphor plate for transmitting short wave ultraviolet radiation and for blocking ambient white light; (f) a second phosphor plate removably carried by said housing between said short wave ultraviolet filter and said ultraviolet radiation transmitting, light blocking element for blocking ambient white light; and (g) a long wave ultraviolet filter superimposed over said second phosphor plate for transmitting long wave ultraviolet radiation.