| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light irradiation device which reduces unevenness of an amount of light occurring by unevenness of an amount of light of a light source itself when light reaches to the light irradiation object, or unevenness of an amount of light caused by errors such as an assembly error generated in manufacturing an optical system when the light reaches the light irradiation object to further improve evenness of the light when reaching the light irradiation object, and which irradiates light emitted from a light source on the light irradiation object with high using efficiency. <P>SOLUTION: The light irradiation device includes the light source 1 for emitting light, a first optical element 4 for parallelizing the light emitted from the light source 1, and a second optical element 6 for converging the light parallelized by the first optical element 4 and irradiating on the light irradiation object 7, and further includes a refraction dispersion sheet 2 arranged adjacently or closely to the light source 1 and including minute refraction elements 21 in an array, and a light diffusion plate 5 arranged adjacently or closely to a light emission side of the first optical element 4 and diffusing the emitted light. <P>COPYRIGHT: (C)2011,JPO&INPIT |
