PROBLEM TO BE SOLVED: To provide a dental light irradiation device that can be inserted into a narrow place such as a root canal of a tooth and a periodontal pocket, and can efficiently condense and apply an irradiation light from an LED light source.SOLUTION: A dental light irradiation device includes a slender tip chip that can be inserted into a narrow place in an oral cavity, a handpiece body with the tip chip attached to the distal side end part, an LED light source attached to the inside on the distal side of the handpiece body, and a lens body for receiving an irradiation light from the LED light source and guiding it the tip chip. A light receiving surface for the irradiation light from the LED light source of the lens body is formed by an aspherical surface, and the tip chip includes a taper-shaped light guide part which is tapered, and an irradiation part formed integrally at the tip of the light guide part so as to emit the light guided at the light guide part.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2017,JPO&INPIT【課題】本発明は、歯牙の根管や歯周ポケット等のような狭隘な箇所に挿入可能で、且つLED光源からの照射光を効率的に集光して照射することができる歯科用光照射装置を提供する。【解決手段】本歯科用光照射装置は、 口腔内の狭隘な箇所に挿入可能な細長形状の先端チップと、前記先端チップを遠位側端部に取り付けたハンドピース本体と、前記ハンドピース本体の遠位側内部に取付けられたLED光源と、前記LED光源からの照射光を受光して前記先端チップまで導光するレンズ体とを備え、前記レンズ体は、前記LED光源からの照射光の受光面が非球面で形成され、前記先端チップは先細りするテーパ形状の導光部分と、前記導光部分で導光された光を発光させるように導光部分の先端で一体に形成される照射部分とを有する。【選択図】図7
