Direct green lasers

mfo said:

We need yellow diodes or cheaper yellow dpss

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Tru dat :beer:
Having green diodes will eliminate the red halo effect (assuming they have a bigger beam diameter) from combining red and DPSS green though. That's a good step forward for yellow in my book.

Honestly, I'll go for any direct green they come up with. I just hope we see it in a form we can use (can package)...

20mW, 50mW, 200mW, 500mW -- multimode, singlemode; doesn't matter to me. Especially if it's a new WL like 520 vs 532.

It's going to be 514-520nm, more likely than not. All the stuff I've seen has mentioned that the diodes are around that wavelength.

Edit: It's not like we didn't see this coming it's been talked about before, but this is the first article I've seen directly mentioning a brand name.

and a red laser specially re-calibrated to output green light

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Don't forget HVD. This format supposedly uses a 1 W green laser. The nice thing is that optical drive lasers have to be single-mode.

aryntha said:

Honestly, I'll go for any direct green they come up with. I just hope we see it in a form we can use (can package)...

20mW, 50mW, 200mW, 500mW -- multimode, singlemode; doesn't matter to me. Especially if it's a new WL like 520 vs 532.

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True... THAT!!

I just noticed, comes out late 2011.

So Mass Effect 3 AND green diodes?! No way!

Might they just throw each diode die on a slab of brass or something like that, like they do with toy red pointers?

That would be the best way to save space, the 5.6mm can is not the smallest option out there.

Meatball said:

Might they just throw each diode die on a slab of brass or something like that, like they do with toy red pointers?

That would be the best way to save space, the 5.6mm can is not the smallest option out there.

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And yet, there are twenty four of those 5.6mm cans in Casio projectors.

aryntha said:

Honestly, I'll go for any direct green they come up with. I just hope we see it in a form we can use (can package)...

20mW, 50mW, 200mW, 500mW -- multimode, singlemode; doesn't matter to me. Especially if it's a new WL like 520 vs 532.

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I was going to point that out.
This projector has a very minimal design. These probably won't be the familiar 5.6mm can packaged diodes.
However, the great thing about this community is that we can pool resources and brainpower to get 'em working for us either way.
:wave:

I can't wait to add a new solid state wavelength to my collection!

RA_pierce said:

I can't wait to add a new solid state wavelength to my collection!

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Here's your ticket to Grenland. That's where the end of the line is.

:na:

I just hope they do come in some "convenient" package to some adaptors can be machined, if not standard 5.6 mm.

If they end up packaged like those flat plastic red ones... ahh I think I'll rather go with DPSS. Well alright, it depends on power but still...

Looks like im gunna wait before I buy the greenie I was considering... I just ran into some not so old threads (2009) on "blue lasers" being a bargain buy at nearly $300 for a 5mW if I remember correctly. Nowadays with the 445nm you could knife edge 2 diodes together running at 2W a piece for $300.

Braddubya said:

Looks like im gunna wait before I buy the greenie I was considering... I just ran into some not so old threads (2009) on "blue lasers" being a bargain buy at nearly $300 for a 5mW if I remember correctly. Nowadays with the 445nm you could knife edge 2 diodes together running at 2W a piece for $300.

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Yeah it'll be blue, but not the same blue. And DPSS 473nm has MUCH better beam characteristics.
It's not all about power.

532nm greenies can be had for a few dollars now. These green diodes will cost much more upon their entry to the consumer market and the power per milliWatt ratio won't be as good as today's cheap greens.

RA_pierce said:

Yeah it'll be blue, but not the same blue. And DPSS 473nm has MUCH better beam characteristics.
It's not all about power.

532nm greenies can be had for a few dollars now. These green diodes will cost much more upon their entry to the consumer market and the power per milliWatt ratio won't be as good as today's cheap greens.

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That may be true but $300 for a pointer that can only make a little blue dot isnt my cup of tea. I get it its a rare exotic color but I personally would rather have a poor beam you can see then a nice beam you cant, especially if the nice beam you cant see costs 3 times as much. Only my opinion. Same reason I dont own a yellow and wont buy another green until I see how this plays out. :beer:

Im not sure why you make your last claim after the "bluish spectrums" went from around $60 per mW to $60 per Watt :thinking:

You could very well be right but im sure no one predicted the 445nm would be so powerful and affordable so soon after its release in the projectors.

Braddubya said:

Im not sure why you make your last claim after the "bluish spectrums" went from around $60 per mW to $60 per Watt :thinking:

You could very well be right but im sure no one predicted the 445nm would be so powerful and affordable so soon after its release in the projectors.

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These Pico Projectors will house only one green diode.
It is not going to be 1W (probably at the low end of Class IIIb).

Our lucky break with blue was that Casio put 24 of them in each projector. In that case, you divide the cost of the projector by 24.

In the case of these green diodes, you divide the cost of the projector by 1. See what I mean?

That is not to say that green laser diodes will not be common eventually, but it will take time. For the time being, it will be hard to compete with the price/mW ratio of today's DPSS 532nm pointers (of course, this depends on what kind of quality you are looking for).

Last I checked, the Pico projectors were quoted for something like $300 a pop. For someone looking for a good bang-for-your-buck laser, a <50mW green diode at $300 is not what I would consider a bargain.

Regarding your comment on beam visibility... A smoke machine (which I have a couple of) will bring out the beam of a low power laser no problem. And as an added bonus, you don't have to worry about burning holes in everything you point it at. But I understand your point of view. I, too, like power but I consider 1W a hazard. Too much power makes it hard to play with casually.