| 摘要 |
<P>PROBLEM TO BE SOLVED: To adjust an imaging size of laser light while imaging the laser light on an observation object part in the interior of an internal space forming body and insert a laser projection device into the internal space forming body from a narrow inspection hole. <P>SOLUTION: A laser projection device 20 for projecting laser light to the interior of an internal space forming body 3 includes a varifocal optical system 7. The varifocal optical system 7 includes a plurality of lens bodies 11a, 11b, and 11c. Each lens body has a lens 12, and holding/moving pieces 13a, 13b, and 13c for holding the lens and being movable in the optical axis direction. Actuators 19a, 19b, and 19c drive the holding/moving pieces in the optical axis direction respectively so as to adjust the imaging position and the imaging size of the laser light in the interior of the internal space forming body 3. Drive force transmitting portions 13a1, 13b1, and 13c1 for receiving the drive force from the actuators corresponding to the respective holding/moving pieces are mutually deflected in the circumferential direction, and the respective actuators are superposed on the corresponding drive force transmitting portions viewed from the optical axis direction. <P>COPYRIGHT: (C)2013,JPO&INPIT |
