| As the pinnacle in high-end laser light technology, | | | | should opt for the type with power above 100mW. |
| Green laser pointers were the exclusive domain of | | | | The second point we should pay attention to is |
| the technological shrinks till few years ago. Today, | | | | whether our green laser has an infrared filter. During |
| even you have no clue about what a laser light is, | | | | the use of laser pointer, radiation will generate and |
| you could get one effortlessly because the | | | | could cause harm to us, especially our eyes. The |
| advancement in technology makes these | | | | function of the filter is to remove the damaging |
| technological marvels become affordable gadgets. | | | | radiation. |
| Laser light devices are easily located in the shops, | | | | Another point we should consider is the beam |
| stores and super malls. They are often used as | | | | divergences. Beam divergence, closely related to the |
| pointers in teaching activities and presentation. One | | | | beam diameter, decides how much the laser beam |
| of the most popular types is green laser pointer. | | | | expands per meter. Usually, the smaller the laser |
| Most of us might often be at a loss when thinking of | | | | beam is, the farther our laser pointer could go. |
| our purchase - there are so many choices and our | | | | The last point is the lens material of the pointer. |
| knowledge about such item is so limited. Plus, | | | | Glass-made lens are the best because of their |
| different ads or appealing packing case often dazzle | | | | durability and practicality. Plastic types often cloud the |
| us. What we should consider during our purchase? | | | | laser beam and don't have strong wear and tear |
| The most important feature of a laser pointer is its | | | | resistance - Deterioration easily happens on the lens |
| power. It is measured in mili watts (mW) and | | | | as time goes by. |
| wavelength. Usually, higher power pointers always | | | | Before your purchase on green laser pointers, think |
| cost you more money. If you use your green laser | | | | about why you will use and when. The more you |
| pointer for teaching or limited area presentation, you | | | | know about your requirements, the higher rate you |
| could choose a pointer with a power of about 5mW | | | | will make a right purchase. Green laser pointers are |
| while a 20mW power pointer is perfect to use in a | | | | easily found, but the type that suits you needs your |
| wider area like auditorium. If you intend to use your | | | | preparation and hard work. |
| green laser pointer to burn or melt something, you | | | | |