High quality four-in-one laser pointer
How to choose a high-quality laser pointer? Early laser pointers used helium-neon (HeNe) gas lasers with a wavelength of 633nm, which were usually used to generate laser beams with an energy of no more than 1mW milliwatts. The cheapest laser pointer uses a red laser diode with a wavelength close to 670/650nm.It is better to use 635nm red-orange diode, this kind of wavelength is easier to be recognized by the human eye. There are also laser pointers of other colors, the most common one is green light with a wavelength of 532nm. The laser pointer is one of the tools needed for teachers and an indispensable slide in the profession of large companies. The world is so big, it is not surprising that since it is such an important tool, you must buy a better one, use it for a long time, and have a better quality. .
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How to buy a high-quality Laser pointer, you should observe the laser pointer from the following aspects. The quality of the LD (bulb), the quality of the lens, the quality of the laser crystal, and the power of the laser pointer affect the quality of the laser beam. Pay attention to the following points when selecting: Observe the spot carefully in a darker place. If there is obvious flooding around the laser spot, the lens is unqualified; observe whether the spot is a perfect solid circle; carefully observe whether there is a problem of flickering and dimming when the laser is emitted. In this way, it shows that there is a problem with LD. If it is a laser pointer with low power (below 20 milliwatts), you need to observe whether the brightness of the laser will become darker and brighter when the laser is emitted. If this is the case, there is a problem with the circuit or LD of the laser pointer.
2021-09-15 12:36:00
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