| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical object discrimination device having a small size and high reliability, capable of detecting accurately the irregularity state of the measuring object. SOLUTION: This optical object discrimination device is equipped with a floodlighting part comprising a collimator lens 2 for irradiating the measuring object 9 with laser light emitted from a semiconductor laser 1 as the first light flux 5, a diaphragm 3, a non-polarized beam splitter 4 and the first condensing lens 8; a light receiving part 12 for receiving a reflected light flux 7 reflected by the measuring object 9; a linear polarizer 13a arranged between the light receiving part 12 and the measuring object 9, for selecting a polarization direction which is the same direction as the polarization direction of the first light flux 5 and allowing the light flux to pass; and a signal processing circuit 12 for processing a signal outputted from the light receiving part 12, and measuring the light intensity in the polarization direction in the reflected light flux 7. The polarization state of the reflected light flux 7 has information of the irregularity state of the reflecting surface of the measuring object 9. COPYRIGHT: (C)2006,JPO&NCIPI
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