Ultrasonic grating line-shaped laser diffraction teaching demonstration and experimental instrument

The utility model provides an ultrasonic grating line-shaped laser diffraction teaching demonstration and experimental instrument, wherein the left end of an optical bench is provided with a laser and the right end of the optical bench is provided with an optical screen. Along the emitting direction of the laser between the laser and the optical screen, the optical bench is provided with an ultrasonic grating groove. Along the emitting direction of the laser between the laser and the ultrasonic grating groove, the optical bench is provided with a cylindrical lens. According to the technical scheme of the utility model, the problems in the prior art that during the experimental measurement by means of a spectrometer, diffraction fringes are poor in intuitive nature, and diffraction spots formed in the conventional manner, that is, a laser beam directly passes through an ultrasonic grating to form the diffraction spots, are unclear in separation and cannot be measured, are solved. The ultrasonic grating line-sh