Patent ID: 7926163
Filing Date: 2011-04-19
Classification: B81B,G02B,Y10T

Abstract:
1. A method of producing an oscillator device having an oscillating member, a resilient support and a supporting member, the oscillating member being resiliently supported by the resilient support for oscillation about an oscillation axis, said method comprising: forming the oscillating member with a movable element having a plurality of protrusions for adjusting a mass of the oscillating member, the protrusions extending from the movable element in a direction parallel to the oscillation axis and being formed in pairs, each pair being disposed at positions symmetrical with respect to the oscillation axis, wherein a sectional area of each protrusion along a plane perpendicular to the oscillation axis is constant in the oscillation axis direction; and projecting a laser beam to a cutting position of each of protrusions be cut, so as to partly remove the protrusion, wherein the protrusions are so cut that based on adjusting the cutting position, the sum of the lengths removed from the protrusions by the cutting becomes equal to a predetermined length to thereby adjust an inertia moment of the oscillating member.