Beyond a certain distance the light attenuates into invisibility. You can test this yourself by buying a 1mw laser pointer from Staples or other stationary store and having a friend shine it into your own car parked at the other end of a football field or wherever to see the affect. This power of laser is too weak to make a noticeable distraction beyond about 500 feet, so it would be unlikely to affect a plane. The lasers in Christmas projectors are 1 milliwatt lasers. These types of lights are unlikely to affect an aircraft. To draw a pattern a laser light must move, so the time of illumination of a point is reduced when the device is working correctly. There are actually 2 laser leds, a red and a green, is it 2x1 mW or 2x0.5 mW? In practical the lasers probably can't illuminate the same eye, due to the divergence of their beams.As the class is not mentioned on the label, I would be careful when seeing this item.A class 2 laser led couldn't blind someone unless the person is at a few meters (15 m for temporary blindness and 3 m for eye damages, if the eye is forced to stay open).Most countries have regulations for dazzling a pilot, regardless of the mean and power used, it's the effect that is taken into account.The effects of a more diverged beam are weaker. The above distances are for a tightly focused beam, which is probably not the case of an inexpensive laser device. It can cause distraction, being brighter than surrounding lights, within 2 miles (3.2 km) of the laser.It can cause glare, blocking a pilot or driver's vision, within 1050 ft (320 m) of the laser.A 0.99 mW Class 2 laser beam can temporarily flashblind a pilot or driver, causing afterimages, within 240 ft (73 m) of the laser.You may use it for a 1 mW laser light by dividing the distances by 5: This image shows the effect of a 5 mW laser light. (glare aversion response to bright lights) will limit the exposure to There is a non-standard warning: " Laser aperture, Max output < 1 mW" near the leds:Īs the leds are in the visible spectrum, this is equivalent in power to a Class 2 laser.Ī Class 2 laser is considered to be safe because the blink reflex A regular led would require a moving focusing mirror, something expensive.
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