Laser pointers are popularly applies in different professions like teaching, medicine, science, astronomy and entertainment. More and more people like to buy laser pointers just for fun, but how much do you know about them? As a matter of fact, laser pointers can be very harmful and can cause some serious eye damage.
Laser pointers in the market out there normally have two appearances, one of which is like a pen and the other looks like a flashlight. Laser pointer flashlight usually has a greater power than laser pen.
Okay, let’s talk about the specifications of laser pointers. There are actually two main specifications we should pay attention when we choose laser pointers: wave length and the power. The wave length is described in NM, and the common wave length is 532NM. Of course there are also some other wave lengths in the market like 405nm or 650nm for your choice. Power is a specification people care when they choose. The lowest power is about 3mw while the strongest power can be reach 1000mw. But it is not allowed to use except special purpose with a user license.
Laser pointers can also be classified into red laser, green laser, purple laser and blue laser. Green laser is more visible and brighter than others, so some people complains about their red lasers being fake because they compared it with a green laser of the same wave length and power. If you just use it in a speech or class, the laser under 50mw power is your great choice. The lower power of laser, the price is cheaper. If you want to purchase a cheapest laser pointer, you should choose the green color because it is more visible and brighter. If you are an astronomer, the green laser with great power your best choice. It has a better effect when you point stars.
Another amazing fact is that some laser pointers can light a match. Well, not every laser, just the ones with above 200mw power. What you should really be cautious is that laser pointers should never be pointed directly into people’s eyes, because they could cause permanent damage. And that’s why laser pointers are banned in some countries. You should learn the laws and regulations about laser pointers in your country before you purchase a laser pointer.
