Patent ID: 8643915
Filing Date: 2014-02-04
Classification: G02B,H04N

Abstract:
1. An image sensor unit, comprising: a light guide reflecting light rays from a first light source and a second light source arranged near light entering surfaces at both ends thereof, by a reflection surface to make the light rays exit through a light exiting surface and illuminates an illuminated object; an imaging element forming an image of a reflection light ray from the illuminated object; and a sensor substrate on which a plurality of photoelectric conversion elements receiving the reflection light ray whose image is formed by said imaging element is mounted, wherein said first light source is composed of one or a plurality of light emitting elements, wherein said second light source is a light source different in emission wavelength from said first light source and composed of one or a plurality of light emitting elements, wherein the reflection surface provided at a surface opposing the light exiting surface is provided with a first reflection part and a second reflection part, wherein the first reflection part has a high spectral reflectance with respect to an emission wavelength from the light emitting element provided in said first light source, and has a reflectance on a side of the light entering surface arranged opposite to said first light source higher than a reflectance on a side of the light entering surface near which said first light source is arranged, and wherein the second reflection part has a high spectral reflectance with respect to an emission wavelength from the light emitting element provided in said second light source, and has a reflectance on a side of the light entering surface arranged opposite to said second light source higher than a reflectance on a side of the light entering surface near which said second light source is arranged.