| 摘要 |
An endoscope system capable of observing a front view and a side view simultaneously is provided by employing a beam splitter, a first shutter and a second shutter. A front view in a longitudinal direction can be observed when the first shutter is open such that light beams pass through the beam splitter. A side view in a perpendicular direction can be observed when the second shutter is open such that light beams through the open shutter are reflected by the beam splitter in the longitudinal direction. The front view and the side view can be observed simultaneously, when the first shutter and the second shutter are alternatively operated such that the first shutter is open while the second shutter is closed and vise versa.
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