| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical scanner capable of approximating a frequency of a driving signal to be output to an optical scanning section to a resonance frequency without changing a scan trajectory by the optical scanning section even if the resonance frequency of the optical scanning section is fluctuated by manufacturing variation, a temperature change, or the like; and to provide an optical ranging device using the same. <P>SOLUTION: An optical ranging device 1 includes: an optical scanning section 3, upon swinging of a movable part having a light reflecting plane, performing a Lissajous scan of light incident on the light reflection plane; a driving section 5 outputting first and second driving signals to the optical scanning section 3 and swingingly actuating the movable part; a light source section 7 emitting pulse light to the light reflecting plane; a light receiving section 9 receiving the reflected light of the pulse light; and a ranging section 11 measuring a distance to an object reflecting the pulse light. The driving section 5 is configured to change the frequency of the first driving signal and the frequency of the second driving signal while retaining the frequency ratio thereof. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
