Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

445nm blue diodes

The idea is not bad, as they present it as plug-and-play for cellphones and so on ..... just, they don't mention energy consumption and battery lifetime ..... you know, lasers are not exactly low-power consumption devices :)
 





^But the Microvision system is still using DPSS, making it much bigger and much more energy-hungry than what will be available once diodes are actually available. Blue diodes are available, but need some more work in general, and green diodes are not available. Once they are, Microvision's current products will be obsolete, because DPSS will never be as small or efficient as direct injection diodes.

---------------------------------------------

Benm- We're not likely to see anything into the UV for more dense optical storage in the future, in my opinion. We're very, very close to the ability to stream HD video content over the air, and a long way from any large scale manufacturing of solid state UV lasers. As far as current technology goes, it would be in the same material system, it's likely quite possible. But data transmission rates are growing so fast that they're sure to outdo any progress in UV lasers in the future. And if we're able to stream the omvie to you, why would you bother buying a new disk player and going out and renting the movie? Just stream it live or download it.

And, any company or research lab with the ability to make such things is concentrating on blue and green lasers, not on going in the opposite direction. But in theory, it's a fairly simple idea. Gallium nitride puts you into near-UV. Adding indium lowers the bandgap, and changes light emissions from near-UV to violet, then blue, the indium. But if you don't use indium, and instead add aluminum to gallium nitride, it increases the bandgap and gets light emission further into the UV. Of course there are a TON of other problems you get into, but that's the cliffnotes version.en green as you add mor
 
pullbangdead said:
^But the Microvision system is still using DPSS, making it much bigger and much more energy-hungry than what will be available once diodes are actually available. Blue diodes are available, but need some more work in general, and green diodes are not available. Once they are, Microvision's current products will be obsolete, because DPSS will never be as small or efficient as direct injection diodes.

---------------------------------------------

Benm- We're not likely to see anything into the UV for more dense optical storage in the future, in my opinion. We're very, very close to the ability to stream HD video content over the air, and a long way from any large scale manufacturing of solid state UV lasers. As far as current technology goes, it would be in the same material system, it's likely quite possible. But data transmission rates are growing so fast that they're sure to outdo any progress in UV lasers in the future. And if we're able to stream the omvie to you, why would you bother buying a new disk player and going out and renting the movie? Just stream it live or download it.

And, any company or research lab with the ability to make such things is concentrating on blue and green lasers, not on going in the opposite direction. But in theory, it's a fairly simple idea. Gallium nitride puts you into near-UV. Adding indium lowers the bandgap, and changes light emissions from near-UV to violet, then blue, the indium. But if you don't use indium, and instead add aluminum to gallium nitride, it increases the bandgap and gets light emission further into the UV. Of course there are a TON of other problems you get into, but that's the cliffnotes version.en green as you add mor
Click to expand...

The spec sheet says 442nm, I've never heard of a 442nm DPSS?

Also, this page says it can show a full movie using its internal battery http://www.microvision.com/showwx/specs.html
 
Last edited:
442nm DPSS does exist, but I doubt they have been able to get them that small.... The ones I know of are only about 10mW max and are fairly large
 
Doesnt really matter, even at 100% efficiency you could not project a 100" image of decent brightness from a cellphone battery. But a notebook computer that projects a 24" screen on the wall, why not? ;)
 
I saw images of the CES (consumer electronic show) at Las Vegas, and they was a lot of portable projectors for cellphones and Ipods. Many are prototypes, but some are disponible. They probably use red and blue diodes, and a DPSS green module:). Or they might use hight power white LEDs :(.

Maybe I should google it.. ;)
 
I doubt they use blue diodes. Visible ones are still crazily expensive and probably not very reliable yet. 405 nm are unusable for this application, unless you project onto something that fluoresces satured blue from 405 irradiation and is otherwise white.

I suppose you could get a decent looking result by just projecting onto paper - the blue wont be very saturated, but it might look 'good enough' as long as you choose the content smartly.
 
I said most of those where prototypes not for sale, it just the companies showing off.

They are probably out of price, but they display them to show what's coming up in consumer electronics.
 
Uhm, about companies that show trailers and anticipations of future technologies, i remember when car auto makers do those "presentation shows" of big, bigger and biggest :p amplifiers units for car ..... all beautiful, until you don't notice the two cables, 25mm or more diameter, hidden under the carpets, and follow them til the 400 Ampere power supply hidden in the stage back, LOL .....

All those shows about mini projectors are very good, but when i go to see those shows, i always search also for hidden cables, or 100-pieces spare battery boxes, hidden under the desk ..... and sometimes, i also found them :p :D

Anyway, we can always hope that technology go enough for let all those gadgets very cheap and useful for the peoples, right ? ;)
 
Laser projectors have LOTS of potential, don't worry...

Soon we will see them in TVs, small projectors for cellphone and how theater, and probably one day in full size projections.
 
Thanks for the links.

If we want more informations, all we can do is send an email to the company...

And now we'll know for sure.
 
wow those projectors are amazing! just go's to show how amateur we are at making lasers compared to the big guns, fitting 3 lasers, control processors and optics into that small enclosure! closest iv'e seen is rog8811 pocket spiro, which in its self is amazing, top work.
 
jnrpop said:
wow those projectors are amazing! just go's to show how amateur we are at making lasers compared to the big guns, fitting 3 lasers, control processors and optics into that small enclosure! closest iv'e seen is rog8811 pocket spiro, which in its self is amazing, top work.
Click to expand...

You really can't compare it at all. They have the ability to mount the laser die on a single surface with micro optics. It is all so complex that you really can't compare between the hobbiest market and the professional market.

Additionally, they are using a resonate MEMS chip to do the scanning. You can buy the chips now and make laser shows with them, however, they cost 2-3 thousand for a full setup.
 
You must log in or register to reply here.


Back
Top