Light source device and endoscope apparatus using the same

A light source device comprising:

• a light emission part in which a plurality of illuminants are arranged on a support body;
• a light guide member in which light emitted from the light emission part is introduced into an incidence surface at one end of the light guide member and through which illumination light is emitted from an emission surface at the other end of the light guide member;
• and
• a light collecting member which is located between the light emission part and the light guide member and through which the light emitted from the light emission part is collected into the incidence surface of the light guide member,
• wherein the light collecting member includes a plurality of tapered columnar bodies tapered toward the light guide member from the light emission part,
• wherein the plurality of tapered columnar bodies are placed so that tip portions thereof are opposed to the incidence surface of the light guide member, and base end portions thereof are opposed to light emission surfaces of the illuminants, and
• wherein a selective translucent member that limits transmission of an infrared component, the selective translucent member being located at a portion along an optical path leading from the light emission part to the incidence surface of the light guide member.