Patent ID: 7366221

Claim:
A laser apparatus, comprising: a diffraction grating that receives laser light from a semiconductor laser, emits first order diffracted light having a predetermined wavelength to the semiconductor laser, and reflects zero-th order light; reflection means for reflecting the zero-th order light reflected by the diffraction grating; hold means for holding the diffraction grating and the reflection means while an open angle of the diffraction grating and the reflection means is kept constant, the hold means being rotatable with a fulcrum of an intersection of an extended line of a front surface of the diffraction grating and an extended line of a front surface of the reflection means; linear drive means for rotating the hold means with a linear motion of a piezoelectric device that expands and shrinks by the piezoelectric effect; and a connection portion that fits a sphere member that protrudes from the hold means and a reception portion disposed on a moving member that performs the linear motion of the linear drive means.