Lasers pens have become an essential accessory during presentations. Several doctors, engineers, students and teachers use lasers pens to point their targets while presenting any topic in their respective field and institution. Recently such lasers pens have been introduced that have green light and they consume a power of approximately 200mW. One can hang the green laser pointer of 532nm on his waist and therefore such pens are very easy to carry. The laser waves produced by such pens are of approximately 532nm, which is quite enough to produce a highly visible light beam. The lasers pens are very much used by the astronomical observers. They point the stars through these pens. The builders also use lasers pens to survey and measure the buildings in the construction field.
Such lasers pens are easily available in the market in innovative design and colors. The laser waves produced by the laser pointers were initially red but now green laser waves are also produced. If anyone is presenting any specific topic, a chart or a map in his classroom or at a business meeting or conference then the lasers pens are very essential. He or she can target the points easily in front of others.
As commonly observed, the lasers pens are widely used for military purposes. The targets and safe areas are easily pointed through these pens. One can easily identify the number of targets on a particular map, through these pointer pens. A continuous output wave is produced each time a laser pen is switched on and the range of the laser is from 10 to approximately 10000m.
The filter and the glass used in lasers pens are of a fine quality and these pens are very easy to operate and carry. The highest standards of presentation and targeting can be met through these laser pointers. These laser pointers are also used for alignment, indicating, forensics and sky pointing.
Before buying a laser pen one should check whether it has a glass lens or a plastic lens because a plastic lens will get damaged and the laser beam will get clouded soon. Usually a laser pointer or pen has a six months warranty and one can use this warranty anytime. The major part of a laser pointer is its focusing lens. If the focusing lens is of a good quality then the laser pointer can be used for a long period of time.