It is known to all that over the last few years laser pointers have received attention in the press and aroused some public concern. As increasing popular consumer electronics product, laser pointers are enjoyed in educational and business presentations as well as visual demonstrations as an eye-catching pointing device.
According to the free encyclopedia-Wikipedia, a laser pointer is a small laser designed to highlight something of interest by projecting a small bright spot of colored light onto it. There are mainly 4 types of laser pointers: red laser pointer, green laser pointer, blue laser pointer and yellow laser pointer. Among them, Red and green are the most common ones. Red laser pointers can be used in almost any indoor or low-light situation where pointing out details by hand may be inconvenient, such as in construction work or interior decorating. And Green laser pointers can be used for similar purposes as well as outdoors in daylight or for longer distances. Thought red laser used to be the most common, green has seen its movement upwards in popularity and have become the most popular color of laser beam used by pointers and laser users worldwide. This is primarily because the cost of the technology has been reduced and a green laser beam appears brightest to the human eye at the same mW power.
There world has witnessed a lot of advances to laser pointer technology throughout 2009 that really improved the quality and variety of lasers available today. And if you choose to get this cool electronics gadget from an online wholesale electronics store, you will enjoy the amazing competitively lower wholesale price. Indeed, today’s laser pointer brings you more than convenience.
Take a common cool green laser pointer for example, this cool electronics gadget is very easy to operate, because you just need to push the button, and then you can see the bright and beautiful green light, especially in the darkness night, an obvious green streamer can be seen. And the light can reach as far as 10000m, which is great for pointing things from long distances. And of course such a cool electronics gadget can be widely used in your daily lives and work. The light can point at any target at the distance of 10m to 10000m, which you can use it for pointing at blackboards, video monitors, photos and so on. Therefore, it is suitable for teachers, doctors, and etc. and it also can be used in industry activities, such as illumination, sky pointing, alignment and so on.
Though laser pointers are designed to be safe when used for their intended purpose. Unfortunately, however, this cool electronics gadgets can easily be misused. And we must fully realize the risk of laser pointers. Visible laser pointers operating with 1-5 mW power are Class 3a and can be hazardous if viewed even for a very short time. Users should never look directly into the beam of Class 3a laser pointers, which are required by Food and Drug Administration (FDA) regulations to be marked “DANGER.” And Class 2 lasers are labeled “CAUTION.” Possible hazards include startle effects, flash-blindness, glare, and after-images if a person is struck directly in the eye. Numerous cases of such incidents have been reported, along with cases where individuals overreacted to being flashed. You must have read news about car accidents caused by lasers flashing in people’s eyes or Accidental police shootings due to mistaking beams for laser sights. Indeed, high-power laser pointer might cause permanent damage to eyes or other health effects.
Due to its danger to human health, many countries have released related laws and regulations to restrict or ban using high-power (over 5 milliwatt) typically-green laser pointers, for such consumer electronics are extremely dangerous. So, if you have decided to get a laser pointer from online wholesale electronics supplier, please first confirm with your local law to make sure it is legal to use and always use it as carefully as you can.
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