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In article ,
Larry Dighera wrote: On 29 Sep 2004 07:58:03 -0700, (Mike) wrote in : : Laser injures Delta pilot's eye A pilot flying a Delta Air Lines jet was injured by a laser that illuminated the cockpit of the aircraft as it approached Salt Lake City International Airport last week, U.S. officials said. at http://www.washtimes.com/national/20...1356-3924r.htm Military personnel also have suffered eye damage from laser illumination. In one case, Naval Lt. Cmdr. Jack Daly and Canadian helicopter pilot Capt. Pat Barnes suffered eye injuries hours after an aerial surveillance mission to photograph a Russian merchant ship that had been shadowing the ballistic-missile submarine USS Ohio in Washington state's Strait of Juan de Fuca. The Navy recently turned down an appeal from the Defense Department inspector general to award Cmdr. Daly a Purple Heart for the incident. Cmdr. Daly, who retired from the service last year, continues to suffer eye pain and deteriorating vision. In the vast majority of these cases, "dazzled", and ergo potentially "endangered" would be valid terms, "injured" would not. The primary hazard to pilots from laser radiation at the distances and with the most commonly used types of lasers in the light-show and even in the military scenarios is going to be the kinds of instantaneous and short-term visual impairments that would be associated with the term "dazzling" -- that is, loss of night vision, temporary loss of all vision of the sort resulting from looking at any bright light source, possible severe disorientation if the pilot keeps trying to look at instruments or outside the aircraft while this dazzling continues -- rather than permanent eye damage or injury. Temporary deterioration of vision caused by such dazzling effects is obviously a very serious matter; but it would require quite unusual optical beam power levels to produce permanent eye damage or injury from a laser beam in aviation situations. My understanding is that deliberate dazzling of enemy pilots has in fact been used in various military situations in recent years, but public information concerning this is limited. I do have some familiarity with the Daly case. Both a prolonged, detailed and extensive investigation by the U.S. Navy and also the jury verdict in a subsequent civil damages trial concluded that it was very unlikely Daly was even illuminated by a laser beam during the mission referred to, much less injured by it. There are also other quite questionable assertions even in the one paragraph quoted above. |
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