Patent ID: 7911160

Claim:
An oscillation device comprising: an oscillation system including a torsion spring which defines a torsion axis, and an oscillator connected to the torsion spring and movable about the torsion axis; a supporting unit configured to support the oscillation system; a drive unit configured to drive the oscillation system so that the oscillator is oscillated in a manner expressed by an equation containing a periodic function; and a drive control unit configured to supply a drive signal to the drive unit, wherein the drive control unit includes a drive-signal generating circuit, the drive-signal generating circuit including an address generator configured to generate an address to which a predetermined variable is added at a frequency higher than a frequency of the drive signal, and a trigonometric-function table which stores trigonometric values at addresses thereof and which is indexed by an output of the address generator, the drive control unit being configured to generate the drive signal using the address generator and the values stored in the trigonometric-function table, and wherein a drive frequency of the drive signal is adjustable by adjusting the predetermined variable.