Laser Pointer

How can laser pointer be applicable?

Teaching, lecture or speech. laser pointer gets the most common application on teaching. It is a modern mold or equipment. Its application has just make speaker free from the stage, and go anywhere in need. It makes great work in speech, lecture, business conference etc.
Astronomy stargazing and constellation observations. Owing to the most visible and most sensitive laser light projection, laser pointer is very popular among laser amateurs and astronomers. 5mw laser pointer can project a highly bright laser beam and light spot at night. Laser amateurs can use it to make clear stargazing, constellation observation, low clouds and other celestial objects etc.

How to select a genuine laser pointer?
1. Make careful observation of laser spot in dark place. If there is clear floodlight, the laser light lens failed.
2. Check whether laser dot is a totally round dot, usually within 2mm diameter.
3. Check whether laser beam brightness of glaser pointer changes from bright to dark. If yes, laser pointer electric circuit board and laser diode might have problems.

the laser has four  features:
Monochromatic: Light emitted by ordinary light sources is different in frequency, so it contains various colors. Lasers emit the same frequency of each photon, so laser is the best monochromatic light source.

High brightness: Due to the strong emission capability of the laser and the high concentration of energy, the brightness is very high, it is hundreds of times more than ordinary light, tens of billions of times higher than the brightness of the sun's surface. Brightness is an important indicator of the quality of a light source, if the medium intensity of the laser beam through the convergence, can produce a few thousand to tens of thousands of degrees in the focus of the high temperature.
Good directivity: the divergence angle of the laser beam is very small, almost a parallel light. The spot formed by the laser irradiation on the moon is only about 1 kilometers in diameter.
Coherence: coherence is common to all waves, but because of the quality of various light waves, resulting in their coherence is also high and low points. Ordinary light is spontaneous radiation, will not produce interference. Laser is different from the ordinary light source, it is stimulated radiation, with a strong coherence, so called coherent light.

Except for very low powered lasers, lasers pointer do pose a hazard particularly to vision. But the high power laser will cause serious damage to the human eye, don't take your eyes for granted because once your eyes are damaged, they will not grow back!
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How to safely use the laser pointer

Do not Point Laser Beams at Faces or Eyes
Do not Point Laser Beams at Aircraft
Do not Point Laser Beams at Vehicles
Do not Hold a Laser Beam on the Skin
Do not Give Laser Pointers to Children

Laser pen application

The laser pen can light matches or cigarettes, burns paper, shoot balloon, repel birds and much more. It also can be used in astronomy refers to the stars, wild adventure, the preferred equipment for astronomy enthusiasts, outdoor enthusiasts.It is also the best toy for your dog, cat, and other pets.