| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical apparatus capable of simultaneously observing light rays entering from two directions. SOLUTION: An endoscope apparatus comprises: a first objective optical system (direct viewing objective lens 11a) which turns incident light into parallel light; a second objective optical system (side viewing objective lens 11b) which has an optical axis different from that of the first objective optical system and turns incident light into parallel light; a shielding part 15 configured by alternately arranging slit-like transmission regions and shielding regions; and a diffraction grating 17 of deflecting an optical path of light passing through the shielding part 15 into a predetermined direction. A part of light made incident via the first objective optical system passes through the transmission regions and the remaining is shielded by the shielding regions. A part of light rays made incident via the second objective optical system pass through the transmission regions and the remaining are shielded by the shielding regions. COPYRIGHT: (C)2009,JPO&INPIT
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