A laser pointer on a finger

Recently, in the famous website design unveiled the a new laser pointer, with simple style and comfortable use feeling, can effectively and stably display circle, point and line, and does not destroy the presentation of fluency. It is out of the traditional pointer design and is shaped into a stylish ring on the finger. Designers from the initial dot matrix laser pointer, and added a sliding button to help draw the circle and line. When the pointer is set on the index finger, the thumb can be used to slide the button on the ring. A circle, points, lines, and three options button, when to slide show circle, slide, the higher the larger circle; when down slide show lines, slide lower the longer the line; button placed intermediate time is displayed and the old section of the pointer as dots. In the course of the demonstration, the presenter can move their hands freely, which emphasizes the important area through the circle, the point and the line. With a new laser pointer, the presenter can be more focused on speech and presentation, rather than groping in the hands of a small tool, so that you will be handy in the speech.

Red light laser pointer 200mw structure is the most simple, the reason why simply because the red laser pointer is basically a battery powered by the diode. And a laser diode with the wavelength. Red laser appeared in the early 1980's, is a huge and bulky equipment worth hundreds of dollars; it is very small and very cheap.

The use of wavelength 808nm infrared laser pointer 1000mw to stimulate the nonlinear crystal, produce 1064nm infrared light, and then the second harmonic generation 532nm green light, which belongs to the solid laser. Some green lasers work in the pulse or quasi continuous mode to reduce the cooling problem, to extend the battery life. The announcement does not require frequency doubling of the green laser has a higher efficiency. In the night even the low power of the green light due to the atmospheric molecules of the Rayleigh scattering can also be seen, the laser pointer is often used by astronomy enthusiasts for pointing stars and constellations.

The market appears to have a wavelength of 593.5nm yellow light laser pointer 2000mw. By using DPSS technology to wavelength of two laser beams 1064nm and 1342nm through a nonlinear crystal phase. The complexity of the process makes the yellow laser pen unstable and low efficiency, with the change of temperature output power in the 1-10mW, if the overheating or too cold will occur mode jump. This is because the size of the laser pointer does not provide the required temperature stability and cooling components.

Laser pointer is the presentation of the most common one of the tools, however, are now using a laser pointer will have limitations, because the only point to a point, demonstration in the demonstration process often have to hold it to find a point to the location, waving a pointer to draw circles and lines will dry disturbing the audience's attention.