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Green Laser Pointers

Budding astronomers typically have experienced many a frustrating situation when they saw a star or other heavenly body of interest and trying to point it to their companions using your fingers, arms, or wild gestures. One very simple, not to mention elegant and convenient, solution for this problem is utilizing green lasers to draw your companion's gaze to the object of interest.

Among the many other colored laser beams available on the market, why use green laser pointers? The eyes are very sensitive and receptive to green colors, which is why green laser beams are more visible to the naked eye. Another reason lies in the effect of the earth's atmosphere on light. Higher wavelengths of light are scattered more than lower ones, thus they are more visible. Green belongs to the medium wavelength of light, making it more visible than red, which belongs to the longer wavelengths.

Green laser pointers are not just made for pointing out celestial objects in astronomy. Scientists have also mounted green laser pointers on a telescope through securing it with a bracket or holding it in the groove that is parallel to the optical axis of the telescope. The green laser beam will then show where the telescope is trained on and what is viewed by it. Thus, it becomes much easier and faster to align the telescope to the heavenly body of interest.

Green laser pointers have varying power levels ranging from 1mW to 200mW. It can be quite confusing to decide which type of laser level will be best for sky-gazing. Here are some tips to help you choose the right power level for your astronomy laser

1. Take into consideration the number of people who will be with you while you are star-gazing. If you're with only one companion who will probably just be standing near you all the time, a low-power laser (5mW is ideal) should be sufficient. However, if you are in a group and you are scattered all over the field, you can get their attention using high-powered lasers such as those who have 100mW and above.

2. Note the lighting conditions that you will encounter. If you're stargazing during the dawn, dusk, when there is a full moon or in an area where there are lights can prevent you from seeing the sky clearly, choose a high-powered laser such as 50mW or higher.

It is best to suit the laser according to the needs of the stargazing group. There were accounts of ruined stargazing trips just because the laser light proved to be a distraction, thus they did not pay attention anymore to the heavenly bodies they were supposed to be looking at.







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