Laser pointers have been used for many years now and there are a number of applications for which they can be used. The first models were red laser pointers which became available in the early 1980’s and this type is the most common laser pointer. Although not particularly powerful in the early days, in recent years as technology has developed, high power laser pointer devices have become available and these can be used for a number of purposes.
The American National Standards Institute classifies lasers by their power from Class 1 to Class 4, with the higher the class the more powerful the laser. The power of a laser pointer is measure in milliwatts (mW) with those that are less than 1mW being Class 2 and those that are between 1 and 5mW being Class 3a. High powered laser pointers are generally those that are nearer 5mW and although these are considered safe to use it still pays to be careful when working with them. Lasers above 5mW can cause damage to the eyes and skin and these are generally not promoted as just pointers and typically safety goggles are recommended if using these.
In recent years a number of high power laser pointer devices have been developed and introduced to the market. The most common of these is the green laser pointer and these can be the best type to choose as the human eye is most sensitive to green light and they tend to look the brightest. However other colors are available and this can include yellow, blue and violet laser pointers.
High power laser pointer devices can be used for a number of applications. They are typically used in astronomy and can help to pick out and identify individual stars and constellations. They can also be used in construction as an aid to help create straight lines and level surfaces. Another application is as a presentation aid. If a screen projector is being used, a laser pointer can be employed to highlight information on it to focus the attention of those listening. It can also be used as a survival tool with anyone who gets lost or stranded using it to attract attention and show their location.
One of the best places to find a high power laser pointer is on the internet. There are a number of websites that provide information about the various types available and many of these have stores where a laser pointer can be purchased. Green Laser are an example of this and they sell green lasers at just below 5mW. Other online stores sell laser pointers up to 5mW and also lasers at greater power. Typical of these is Laser To. This company sells various colored lasers at a variety of power levels and these vary in price depending on the strength and laser color. Lower strength models can cost around $100 and this can increase to $1,000 or greater for higher powered models.
A high power laser pointer can have a number of applications and if you need a pointing tool they are something to consider. They are simple to use and effective although should be used carefully to ensure your own and others safety.