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Over 10 lumens and keep class 2 rating?

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I was talking to a friend who is pretty smart about lasers, and just wondering what you guys think?

Microvision has a laser pico projector out now and it is a 10 lumen projector.

From what i've heard it just barely squezzes under the 1 mw light output rating, and it keeps under the class 2 rating (even though it has 60 mw and up lasers in it?)

My question is, will microvision be able to go brighter and still keep a class 2 rating?

Here is what he said:


Q. Will a higher lumen rating keep under the class 2 rating?

A. The mW of output correlate directly to lumens, so that's not physically possible. What may be possible is for Microvision to go over 1mW and retain a class 2 rating by arguing that temporal distribution of photons should be given equivalent standing with spatial distribution. In other words, that a scanning mirror that distributes a stream of photons throughout a solid angle of space in a short span of time should be treated, with respect to eye safety, the same as a lens that distributes the same amount of light through an equivalent solid angle. In both cases, the failure of a safety device - failure of the mirror/laser interconnect or cracking or removal of the lens could expose an end user to greater than Class II energy, so in my opinion, they should be treated the same.


Think they'll be able to make it?
 

aryntha

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They might, but probably not for a number of years. Regulatory stuff like that takes forever, even if it makes perfect sense. You're basically trying to educate politicians and lawyers about lasers to get it done -- no easy feat.
 

Pontiacg5

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That is what I was planning to do when they get cheaper, fix the mirror steady somehow so its a pointer instead of a projector. Maybe just desolder it from the board.
It might have a failsafe that turns the device off if it isn't getting proper readings from the servo though.
 

Trevor

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I wonder how available blue diodes will be by the time the regulations catch up with the technology. Enough to make these irrelevant as a source of a blue diode?

-Trevor
 




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