How about the 405nm laser pointer?
405nm is not as visible as the 532nm green laser pointer, but 405nm does have other advantages. It is a wavelength with industrial use, and because it is very close to the upper end of the human eye spectrum, it is actually almost in the ultraviolet spectrum. When the laser is aimed at the aircraft, it may cause visual disturbance or cause discomfort or even damage to the pilot’s eyes. Solved a large number of incidents involving lasers pointing to aircraft in flight. Many such incidents occur during the take-off and landing phases of a flight, and pilots need to be highly vigilant at this time. The Federal Aviation Administration reported that the pilot had to give control of the aircraft to the first officer.
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Then there is the green high powered laser pointer. At first they were very expensive: in 1999 a basic model cost about $500. But just like the red models, they were quickly reduced in price, and although their quotations never reached the $5 level of the red models, they did become more affordable. Currently, the price of green lasers ranges from US$30 to US$150, depending on the seller.
2021-11-16 09:42:13
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