200mw laser pointer fixed structure

The vibration caused by the laser beam may affect the accuracy. The new produced green laser pointer applies the touch induction technology.Therefore, the 200mw laser pointerfixed structure, but by a multi-faceted rotating mirror to complete the horizontal laser beam scanning, relying on the rotating drum to achieve vertical scanning. They wanted by the modulated laser beam on the photosensitive drum to generate text and images, there should be complete horizontal (along the direction of printing paper line) and longitudinal movement in both directions. Vertical movement is to rely on the drum rotation to complete, and lateral movement of the beam by the scanner to complete.
Acousto-optic modulator works, is the use of sound and light effects produce Bragg diffraction, such as if the glass and crystal produced ultrasonic ultrasonic medium, put the refractive index caused by cyclical changes in the phase-type diffraction grating and a grating constant equal to ultrasonic wavelength, when the laser beam shines on ultrasound in the medium, the green laser pointer beam that produces diffraction, diffraction of light intensity and direction of the will with the ultrasonic frequency and intensity changes, is the sound and light effects.Some green laser pointer can inherit the function of TF card.
By Bragg diffraction theory, when the ultrasonic frequency to maintain a high-frequency signals, in addition to the incident laser beam produces a 0-ray, but also produce a one diffraction. 0 optical control signal synchronization and high-frequency start and stop, a diffraction light exposure of the photosensitive drum to form pixels. Bragg diffraction in only one high-frequency ultrasonic signals in addition to the incident laser beam deflection of 0 produces no light, but still have a 1-order diffraction light, acousto-optic modulator to change the beam propagation, but also to 0 and a light intensity modulation signal changes, if several different high-frequency wave is added to the orthodox transducer is able to produce some of the diffraction of light, a phenomenon known as multi-frequency diffraction.This new type of green laser pointer has the function of optical mouse.