| 摘要 |
<p>PROBLEM TO BE SOLVED: To properly illuminate an area near a target point by improving a lighting apparatus for a medical oral treatment, and facilitate the visual recognition of an illuminated region, and the treatment of the illuminated region.SOLUTION: A body 1 is formed in a ring-shape, and a large number of LEDs are arranged on its one side surface. An emission direction (arrow d) from each of the large number of LEDs is directed to a point f on a center line Z. Thereby, light beams projected from the large number of LEDs are concentrated in a small region F. A doctor can observer the small region F through an opening formed in the central part of the ring-shaped body, or perform medical treatment for the small region F.</p> |
