Laser pointers, chalk sleeves, and ballpoint pens are all important parts of the current teaching. The green laser pointer can be a good indicator of the content of the slide when the slide is played. The chalk cover can be more hygienic when the teacher uses the chalk, and the ballpoint pen is used to make notes on the handouts. However, the prior art chalk cover, laser pointer and ballpoint pen are separated, and there is no way to fix the three together, which will cause certain inconvenience when all three are used. Based on the above reasons, it is necessary to design a combined multifunctional laser pointer. Nowadays, electronic projection presentations are widely used in various industries. Teachers, trainers, and lecturers all encounter such embarrassment when they are making teaching presentations and project presentations. They need to operate the computer while explaining, which is very inconvenient due to restrictions on movement. , The application of laser pointer is to solve this problem. However, the lecturer’s lesson preparation documents need to be brought to the lecture location through a mobile storage device. In this case, you need to bring tools such as laser pointers and USB flash drives. There are many items, and the smaller USB flash drives are not easy to search, which affects your work. efficient.
To make these three characteristics happen, it needs to be called stimulated emission. This does not happen in your normal flashlight-in a flashlight, all atoms emit photons at random. In stimulated emission, photon emission is organized. The photon emitted by any atom has a certain wavelength, which depends on the energy difference between the excited state and the ground state. If this photon (with certain energy and phase) encounters another atom with the same excited state electron, stimulated emission will occur. The first photon can excite or induce atomic emission, causing the subsequently emitted photon (from the second atom) to vibrate with the same frequency and direction as the incident photon. The other key of the laser is a pair of mirrors, one at each end of the high powered laser medium. Photons with very specific wavelengths and phases are reflected from the mirror and travel back and forth in the laser medium. In the process, they stimulate other electrons to jump downward in energy and can cause more photons of the same wavelength and phase to be emitted. The cascade effect occurs, and soon we propagate many photons of the same wavelength and phase. The mirror at one end of the laser is "semi-silvered", which means it reflects some light and lets some light through. The light that makes it pass is laser light.