| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an endoscope which has a sufficiently narrow diameter and enables inside the body to be observed over a wide range from the front to the side, resulting in improvement in work efficiency of a surgery, and which has a simple optical system thereby being disposable. <P>SOLUTION: An endoscope 1 with a built-in optical system includes a long-length body 11 to be inserted into a body cavity, and an imaging part 12 disposed at an end on the distal end side of the long-length body 11. The imaging part 12 includes: an imaging device 125 with an imaging surface 124 arranged along the longitudinal direction of the endoscope 1; an optical lens 127 whose light incident surface 126 is disposed obliquely to the longitudinal direction of the endoscope 1, and which forms images of observation ranges A-D on the imaging surface 124; and a diaphragm member 128 provided on the light incident surface 126 of the optical lens 127 and provided with a hole part 131 formed to causes light to be incident on the imaging surface 124. <P>COPYRIGHT: (C)2013,JPO&INPIT |
