A Fun laser pointer interference and diffraction experiment device comprises a light holder, a base, a laser pointer, a double slit or a single slit, a magnifying glass, a light screen and a support. The central part of the light bracket is provided with a threaded hole, which is rotated into the screw at the upper part of the base, so that the light bracket is fixed on the base; The laser pen is clamped, and the lower end of the support rod welded together with the clamp is inserted into the movable support attached to the optical support and is fixed by screws; Double seam, single seam, magnifying glass and light screen are attached with support rods, their lower ends are inserted into the movable support attached to the light bracket and fixed by screws. The invention uses laser pen instead of he-Ne laser to reduce the cost, and uses dry battery instead of DC power supply. The experiment is not limited by site, and has the advantages of low cost and simple operation.
The existing teaching laser interferometer diffractometer adopts he-Ne laser as the light source for experiment, which is not only expensive, but also can not compare the fringe produced by two colors of light, which can not reflect the interesting characteristics of laser pointer and can not meet the teaching requirements.
Experimental steps:
1. Screw the light support into the base, and then insert the high powered laser pointer, double seam or single seam, magnifying glass and light screen into the support from left to right and fix it with screws.
2. Adjust the laser pointer, double seam or single seam, magnifying glass and light screen so that they are centered in a straight line.
3, open the laser pointer, so that the light spot on the double seam or single seam, adjust the position of the magnifying glass, until the interference or diffraction stripes clearly shine on the light screen.
Fun laser pen replaces he-Ne laser to reduce the cost and uses 6-volt dry battery instead of DC power supply. The experiment is not restricted by the site, and has the advantages of low cost and simple operation. At the same time, the experimental device uses two laser Pointers, red and green, which can make interference and diffraction patterns of red and green light respectively or at the same time, so that students can compare their widths.
