Quelle est la distance du puissant pointeur laser ?
But what about particles in the air such as dust and steam? Why don't these particles propagate the beam and cause it to lose energy? How can high powered laser light under one watt travel several miles in the atmosphere? The apparent brightness of an illuminating spotlight depends to a large extent on the wavelength of the emitted light. Most devices operate in the red spectral region, where the sensitivity of the eye decreases rapidly as the wavelength increases. The brightness of a 650nm device is about twice that of a device emitting the same power at 670nm, while the brightness of a 635nm device is about twice its brightness. However, shorter wavelength laser pointers are generally more expensive. This is especially true for green lasers, which are much brighter than red lasers, but still expensive. They involve diode-pumped solid-state lasers and frequency doublers. Since the frequency conversion of the frequency doubler is generally poor at low power levels, it takes hundreds of milliwatts of infrared light (usually 1064 nanometers) to generate a few milliwatts in a green environment; so the battery will become heavier soon.
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If the question is about how far the light emitted by the green laser pointer can travel, the correct answer is that there is no limit, as long as the light is not absorbed or scattered by the atmosphere. However, as the beam diverges, the area of the beam will eventually enlarge. Therefore, even if the total wattage remains the same, for example, the intensity on the screen will decrease. Therefore, an airplane pilot who observes this beam from an altitude of 10 kilometers will not be disturbed by the remaining low intensity. Indoor and outdoor uses are not always compatible. In fact, outdoors, you need more power to see the laser. Or invest in other equipment, such as test charts, etc. (may be provided by the equipment you see in the "package"). You can only see your laser unless you are working in the dark or in the dark.
2021-12-23 09:22:57
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