| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an illumination device capable of irradiating luminous flux of a desired irradiation pattern in a wide range of irradiation distance. <P>SOLUTION: A reflection type LED 12 is adopted as a light source, and light irradiated from a light-emitting element 17 arranged at a first focus F1 of the reflection surface 14 is once converged at a second focus F2, and then, made to enter into a lens portion 33 to be converted into parallel light. Thereby, accurate parallel light can be formed. Then, the luminous flux converted into parallel light is made to enter into a cylindrical lens 35 and, by changing only one axial direction into a diffusion direction, linear illumination light is formed. Thereby, irrespective of irradiation distance, linear light of a certain pattern width can be irradiated. <P>COPYRIGHT: (C)2010,JPO&INPIT |
