A REFLECTOR HAVING GRADUALLY INCLINED STEP TYPE MULTIPLE PARABOLIC SURFACES FOR ULTRA VIOLET LAMP AND ULTRA VIOLET FOCUSSING DEVICE HAVING THE SAME

摘要

A reflector having gradually inclined step type multiple parabolic surfaces for an ultra violet lamp and an ultra violet focusing device are provided to improve ultra violet energy density by using a plurality of multiple reflection units. An ultra violet focusing device includes an ultra violet lamp(210) and a reflector(220) being arranged on the outer of the ultra violet lamp. The reflector is comprised of a plurality of multiple reflection units. The multiple reflection units have symmetrical and gradually inclined step type multiple parabolic surfaces. Ultra violet rays emitted from the ultra violet lamp are reflected the multiple parabolic surfaces to be focused on a focusing portion. A length(L2) of the focusing portion is shorter than a horizontal length(L1) of the multiple reflection units. The ultra violet focusing device further includes a pair of lateral-inclined reflective plates. The pair of lateral-inclined reflective plates are arranged along the outer circumference of one unit located on the outermost among the multiple reflection units.