| 摘要 |
PROBLEM TO BE SOLVED: To provide a wide angle optical system which receives and emits light (information) with a wide angle of view, even when a window member is made small and the length in an optical axial direction from the window member is reduced, and to provide a device equipped with the wide angle optical system. SOLUTION: The wide angle optical system has a first optical system 1 which has an optical member 12 having at least one planar side surface 12a reflecting a part of the light passing through one window member 11 and guiding the light not reflected by the planar side surface 12a and the light reflected by the planar side surface 12a in the light passing through the window member 11 to the same side, and is configured so that both of a luminous flux of the light reflected by the planar side surface 12a and a luminous flux of the light not reflected by the planar side surface 12a cross with each other at a predetermined pupil position E2. Further, preferably, the wide angle optical system has a second optical system 2 in which the light passing through the window member 11 and not reflected by the planar side surface 12a, and the light passing through the window member 11 and reflected by the planar side surface 12a, are imaged on the same plane. COPYRIGHT: (C)2010,JPO&INPIT
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