These two laser pointers are infrared laser pointers. If data pointer had the wavelength of 808 nm, this one had the wavelength of 980 nm. Infrared lasers come with safety case. You hold within the indicator. They are invisible and had a very close range of pointing near their focus point. An infrared laser pointer with a wavelength of 808 nm had a focus point at 20 cm. The beam diameter is 0 and the beam point is almost too small to see.
When the beam excess the laser, the beam diameter is 3 mm and the beam point is very small. At 40 cm in the laser, the beam diameter is 3 mm and once again the beam point is very small. At 1 meter from the laser the beam is much larger, 12 mm in diameter and the beam point is very large.
The ideal burning range of the infrared laser pointer is from 5 cm to 30 cm. At that side of range, the burning ability is minimal.
This is an infrared display card. This is not clear in the camera but in person the shape and size of the beam is very clear. This laser is 808 nm in wavelength. You can see the beam is round. This laser has a wavelength of 980 nm. The beam is square.
Now, close-up the beam is very large and as you kept further away closer to the focus point, the beam becomes smaller and smaller until at the focus point 3 cm, you have a maximum burning range. As you go to passive for this point, the beam becomes larger and larger again and you have very little burning ability.
One good way to show the shape and size of every laser beam is to burn something. You can quickly see this is a square beam. You did not clearly see, this is a round beam burning plastic for all that will clearly show and the input laser will then burn well nearest focus point. Here, at wavelength 3 cm, through the viability. At the back of to the focus point, 3 cm and then it is really very good. Shall we get close-up, not much. Focus point burns very, very well.
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