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Old 9th October 2012, 09:56 PM   #31
Pano is offline Pano  United States
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I"m not guessing. Having set up laser light show during the day, I can say for sure that the sun destroys them. They come back just fine when the sun goes below the horizon. No mystery there.
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Old 9th October 2012, 10:12 PM   #32
TV7 is offline TV7  Australia
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Quote:
Originally Posted by ashok View Post
A famous musician supposedly announced that he will release his next music album on vinyl because it can reproduce the fine texture of the music better than digital can. You can be sure the disc will cost a bomb ! Wonder if that means there will be no CD version ?
In which case lets hope they modulate/press the LP correctly! I have heard absolutly terrible LPs straight out of the new packet. Some of the best in my opinion were EMI, Atlantic and sometimes the old DECCA!
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Old 9th October 2012, 10:19 PM   #33
TV7 is offline TV7  Australia
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Not much as more than half would land in water. But say you got Australia full of people, (no bias here!) and made them all jump at the same time, and then again just at the right time about half an hour later and so on.

You would very easily as Nikola Tesla postulated, destroy the earth from resonance. He said it would split like an apple! no wonder they thought he was a mad scientistClick the image to open in full size.
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Old 10th October 2012, 02:46 AM   #34
sidiy is offline sidiy  Canada
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It is quite possible to blow a laser diode, with some effort, by causing a reflexion on the integrated monitoring photodiode ( by saturating it).
How it may work? For constant power lasers a photodiode generates a current proportional with the optical power. This is converted to a voltage which is compared with a reference that sets the CW power. Typically this is done at max 80% of the rated diode power to allow for aging and get good service life... ..and to protect the diode against accidental overshoots in the error amp.

With ill conceived electronics (no poles to control rise time, no fast over-current limiting and with the power adjusted to 100% eventually) it only takes a few usec after the occurrence of a reflexion to get a "supernova".

Generally it happens when adjusting the focus, the beam itself gets reflected on impurities on the back side of the lens or on other "bad" optical surfaces.
As for the sun... the only thing playing in sun's favor is its "wideband" but other than that all you need is a shutter...Wait, it may work afterall...
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