445nm Laser Diode Compilation Thread

[RA_pierce]

Re: 445nm Casio Laser Diode Compilation Thread

by 1.84 watts do you mean amps? This can surely handle more than 1.84 watts of drive power..... 1.84 watts of drive power would be like 350mW of output power.

I am pretty sure he means 1.84W output power.
I am not sure, however, how he got that number. Care to explain, herrursciences?

 

[jmgallego]

Re: 445nm Casio Laser Diode Compilation Thread

If they are using different diodes in these two projectors, and these diodes deliver a different max. power, this would mean, grossly, that the diodes extracted from a XJ-A130 would cost about $37 ($799.99+ $21.50 shipping + $70 CA sales tax = $891.49) and $39 for those harvested from a XJ-A140 ($ 849.99 + $21.50 shipping + $74 CA sales tax = $945.49) that is just a difference of about $2.00?

If additional $2.00 would almost double the output, I will pay it... even more than the mere $2.00. This needs to be confirmed.

(Obviously, this does not include the diode extracting service, packaging and shipping).

Jose

Has anybody harvested and compared the diodes from the XJ-A140 yet? Looks like these diodes are getting even more powerful with each new model released.


These facts are from Best Buy's site;


Casio Model: XJ-A130 Up to 2000 ANSI lumens Up to 20,000 hours lamp life $799.99

Casio Model: XJ-A140 Up to 2500 ANSI lumens Up to 20,000 hours lamp life $849.99

 

[Krutz]

Re: 445nm Casio Laser Diode Compilation Thread

congrats, chris! afaik you are the first one to damage a 445nm diode!
..all future ones shall be measured against yours!

manuel

 

[jmgallego]

Re: 445nm Casio Laser Diode Compilation Thread

I am pretty sure he means 1.84W output power.
I am not sure, however, how he got that number. Care to explain, herrursciences?

Agree, photos/videos would be great

This is quite important.

Jose

 

[heruursciences]

Re: 445nm Casio Laser Diode Compilation Thread

It was from a XJ-A140, the power is output power in the emitted beam, without a lens. I will put some more videos on you tube soon, among others, probably one on how to fix the beam to make it a round dot. 0.707 is the RMS integrating number,it turns up in math a lot for everything from calculating AC power to engineering fatigue ratings to calculating the minimal optical damage threshold of laser diodes.

 

[jmgallego]

Re: 445nm Casio Laser Diode Compilation Thread

Thanks for the reply!

Again, this is important because you just may have confirmed that there are two type of 445nm laser diodes.

At this point, if anyone is doing a GB for laser diodes from a XJ-A140, I am in!

Jose

It was from a XJ-A140, the power is output power in the emitted beam, without a lens. I will put some more videos on you tube soon, among others, probably one on how to fix the beam to make it a round dot. 0.707 is the RMS integrating number,it turns up in math a lot for everything from calculating AC power to engineering fatigue ratings to calculating the minimal optical damage threshold of laser diodes.

 

[Xplorer877]

Re: 445nm Casio Laser Diode Compilation Thread

Well it's not confirmed that the A140 diodes is more powerful is it? That's a tidbit of info that the guys running the GBs might like to hear, as well as the buyers. I'd shell out another 2 bone for double the power or lifetime. However, if they are more hardy I doubt they'll be twice as powerful, but you never know. In either case 650mA seems like a good setting for a potable host, from what I'm seeing.

-Tony

 

[oic0]

Re: 445nm Casio Laser Diode Compilation Thread

I doubt they would use different diodes. In the hardware world its usually cheaper to underclock, undervolt, underutilize a part than it is to make two versions. They may bin them and put the best ones in the more expensive models (means cheap ones can be good, expensive ones are more likely good) but I doubt they would make two different diodes.

Same reason most cpu cores within a model range are identical, and video cards within a range are often identical but with cut down features. With video cards this trend sometimes starts to change though since they cost so much to manufacture at some point it does become cost effective to produce one with less transistors and a less complex circuit board, but with something as cheap as a laser diode, I doubt it would be cost effective to produce two unique parts when designing and tooling up for mass production of one will do. Especially when first released (Example: when AMD started releasing dual cores and tri-cores based on its new architecture they were just quads that had weak cores disabled or perfectly fine quads. I believe later dual cores got their own die while tri-cores are still really quads).

 

[ossumguywill]

Re: 445nm Casio Laser Diode Compilation Thread

What kind of efficiency rating are we seeing on these? I've heard a 4:1 ratio at a watt of output, meaning you're losing (and have to dissipate) 4 watts of input energy as heat, per 1 watt of output power. Is this generally true? What kind of power dissipation can you expect from a common hand-held host?

 

[Cyparagon]

Re: 445nm Casio Laser Diode Compilation Thread

Closer to 3:1 as I understand it. 4V@1A 4W in, and 1W light out means 3W heat. 20-25% efficient.

 

[Xplorer877]

Re: 445nm Casio Laser Diode Compilation Thread

Yeah the current in mW is about numerically equal to the current in mA.

-Tony

 

[jmgallego]

Re: 445nm Casio Laser Diode Compilation Thread

Agree, as I said to heruursciences "... you just may have confirmed ..." and I would still liketo confirm it myself.

If there is anyone going ahead and getting a A140 GB, I am in, with the understanding that the may be the same thing... in the name of science, of course...


Jose

Well it's not confirmed that the A140 diodes is more powerful is it? That's a tidbit of info that the guys running the GBs might like to hear, as well as the buyers. I'd shell out another 2 bone for double the power or lifetime. However, if they are more hardy I doubt they'll be twice as powerful, but you never know. In either case 650mA seems like a good setting for a potable host, from what I'm seeing.

-Tony

 

[jmgallego]

Re: 445nm Casio Laser Diode Compilation Thread

I also agree, I think we should prove either way, I am game for it

Hopefully, Casio did do the sorting out... if not... oh well, we just need to be lucky, like heruursciences, and hit the jackpot with a higher power one, or two, or three...

I doubt they would use different diodes. In the hardware world its usually cheaper to underclock, undervolt, underutilize a part than it is to make two versions. They may bin them and put the best ones in the more expensive models (means cheap ones can be good, expensive ones are more likely good) but I doubt they would make two different diodes.

Same reason most cpu cores within a model range are identical, and video cards within a range are often identical but with cut down features. With video cards this trend sometimes starts to change though since they cost so much to manufacture at some point it does become cost effective to produce one with less transistors and a less complex circuit board, but with something as cheap as a laser diode, I doubt it would be cost effective to produce two unique parts when designing and tooling up for mass production of one will do. Especially when first released (Example: when AMD started releasing dual cores and tri-cores based on its new architecture they were just quads that had weak cores disabled or perfectly fine quads. I believe later dual cores got their own die while tri-cores are still really quads).

 

[daguin]

Re: 445nm Casio Laser Diode Compilation Thread

bump

Peace,
dave

 

[mpmsfilho]

Re: 445nm Casio Laser Diode Compilation Thread

Hey, I've a question. Can I use a MicroFlexDriver v5 + this diode + 2x 3.7 batterys??

Thanks

 

[Spoz]

Re: 445nm Casio Laser Diode Compilation Thread

Hey, I've a question. Can I use a MicroFlexDriver v5 + this diode + 2x 3.7 batterys??

Thanks

You need to drop the input voltage to below 5.5v. From two ~4v batteries (the voltage of a 3.7v battery when fully charged) that means a 2.5v drop, which at 700mA would be dissipating 1.7W of heat in diodes. You'd be better off using the 3.7v batteries in parallel, or only one.

This isn't the thread to be discussing this, you can use the search and find more information.