| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low cost optical scanner which is hardly broken, and to provide an image recorder using the same. <P>SOLUTION: A strain gage circuit 34 is formed on a surface of a beam member 20 by a semiconductor process so as to monitor the voltage produced by strain of the beam member 20 (torsion bar spring). A deflection reflective mirror of an optical deflector 12 is rigidly supported by a support body 28 via the beam member 20, and when the deflection reflective mirror shakes, the beam member 20 is deformed to work as a spring. The breakage of the beam member 20 can be prevented by detecting this degree of deformation, namely, the strain of the beam member 20, determining it as a limit of elastic deformation when this value exceeds a specified value, and controlling to halt driving. <P>COPYRIGHT: (C)2007,JPO&INPIT |
