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About A140/A130 laser projectors.

Rafa

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Do they only have 445nm diodes?

How do they generate green and red colors?
 

yobresal

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Theu have a powerful red led, as for green there is a phosphor wheel in there. When the blue laser light hits it it emits a very bright green light.
 

Rafa

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I heard nichia is about to release 510nm diode... oh my god...

This goes fast!
 

qumefox

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I heard nichia is about to release 510nm diode... oh my god...

This goes fast!
Possibly. But there's a difference between them releasing a certain wavelengths, and us getting 1W+ for $35 like is possible with the 445's.

I personally don't foresee projectors with RGB laser diodes until larger versions of the pico projectors appear on the market, and even then they won't have anywhere near the number of diodes in them as these casio's. They'll more than likely only have one of each color.

The reasons I make this prediction are these; The ONLY reason casio used 445 LD's in the first place was to effectively eliminate a light source. The green phosphor wheel is a LOT cheaper than a green LED. Another reason is size and heat. People who have dealt with these projectors know how much heat the blue assembly puts out. Now imagine there being just as many reds, plus half as many greens? That would be one very large, very hot running projector.
 

Rafa

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Hot, yes, anyway, VERY HIGH definition. I'm sure lots videophiles would go for it.
 

qumefox

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Hot, yes, anyway, VERY HIGH definition. I'm sure lots videophiles would go for it.
Nope. the light source has nothing to do with the display technology. The lasers in the a130/a140 aren't doing anything a blue LED can't do other than illuminate the phosphor wheel. As I said, the only reason a DLP projector has lasers in it are because 24x 445's + green phosphor wheel cost less for casio than phatlight green and blue LED's. If the straight LED approach was cheaper, that's what they would have gone with. Casio's goal is to turn a profit after all. They went with lasers because they happened to be the cheapest way to get the end result they wanted, not 'because they were cool' or any other reason.

I still hold that someone making a DLP projector with multiple red green and blue diodes is just a pipe dream for laser hobbyists. Even though I want cheap high power red and green too, we all just have to face the fact that such a projector will neither be cost effective or practical.

The future of laser projectors will have singular red green and blue diodes and will be of a scanning beam nature like the pico projectors... Which i'm all for. Since, while the per diode cost on those will still be a lot higher than say an a130 with 24x 445.. the hobby will then also have a source for ultra cheap high speed scanners and drivers on the market as well.
 

Pontiacg5

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There is a high powered red diode available like the 445 diode that is cheap compared to what they used to be. It is a 500mW 638nm 5.6mm case neutral laser diode. It is multimode, but it is pretty much the same beam profile as the 445 diode. Optics to bring it to around 3x3mm eam at 0.8mRad are going to be available, that is almost better than a regular red diode.
Cost? $210 + shipping.

A high powered highly visible red diode like this that is case neutral is a godsend for making RGB setups.

I believe there will be more diode powered TV's, but probably not a projector. The casio projector is not meant to watch TV and stuff on, it is a presentation projector. Its meant to be small, portable, and highly reliable and visible. It is ungodly loud at full power and will heat up a room like an argon laser. It would be perfect for business presentations, but you would be so much better off with something else for home use.
 

daguin

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There is a high powered red diode available like the 445 diode that is cheap compared to what they used to be. It is a 500mW 638nm 5.6mm case neutral laser diode. It is multimode, but it is pretty much the same beam profile as the 445 diode. Optics to bring it to around 3x3mm eam at 0.8mRad are going to be available, that is almost better than a regular red diode.
Cost? $210 + shipping.QUOTE]

Link? :san:

Peace,
dave
 

Moptsp

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Why is it that we all have to take diodes out of projectors and optical drives? Why aren't they just sold as is from the manufacturer that makes them? And CNI, do they even make there own diodes lol?

I assume making a diode like this our selves is about impossible.
 

Pontiacg5

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There is a high powered red diode available like the 445 diode that is cheap compared to what they used to be. It is a 500mW 638nm 5.6mm case neutral laser diode. It is multimode, but it is pretty much the same beam profile as the 445 diode. Optics to bring it to around 3x3mm eam at 0.8mRad are going to be available, that is almost better than a regular red diode.
Cost? $210 + shipping.QUOTE]

Link? :san:

Peace,
dave
Really Dave? I figured you would have found this by now!

ML520G72 638nm 500mw Diode Group Buy list
 

Canuke

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There is a high powered red diode available like the 445 diode that is cheap compared to what they used to be. It is a 500mW 638nm 5.6mm case neutral laser diode. It is multimode, but it is pretty much the same beam profile as the 445 diode. Optics to bring it to around 3x3mm eam at 0.8mRad are going to be available, that is almost better than a regular red diode.
Cost? $210 + shipping.
Link? :san:

Peace,
dave
Does he mean this Mitsubishi?

Would like to know where those are around for $210...

(side note: why are links the same color as the text? "this Mitsubishi?" above is a link.)

Edit: ah, there she be, right above this post. thanx PontiacG5
 
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qumefox

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Why is it that we all have to take diodes out of projectors and optical drives? Why aren't they just sold as is from the manufacturer that makes them? And CNI, do they even make there own diodes lol?

I assume making a diode like this our selves is about impossible.
Because the diode manufacturers don't want to deal with small fries like us. We would never give them enough business for it to be worth it. They want customers who buy millions of diodes at a time, not people who want one or two diodes a couple times a year. They deal with manufacturers, not consumers.
 




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