| abstract |
A plurality of LEDs 72 , which includes a power unit including two electrodes 72 a connected to an illuminating board 71 and includes an irradiation unit 72 b formed on a top portion of the power unit, with a stair-shaped structure in which an end surface 72 b 1 in a longitudinal side of the irradiation unit 72 b is shorter than an end surface 72 a 1 of the power unit, is arranged so that a longitudinal side is to be along a direction of a circumference “A” having a radius larger a field of view determined by an optical quality of the imaging lens 83 , with an imaging lens 83 of an imaging unit 8 as a center. As a result, an optical flare is prevented from being generated and a capsule endoscope is downsized. |