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A new "Photino" 465nm @ 5W

rhd

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I love this Photino :) It uses the diode I briefly discussed here:
http://laserpointerforums.com/f46/p...-all-op-please-sub-75750-107.html#post1331243

Unfortunately, the diode itself was heavily damaged during my analysis of it, so I had to do some very delicate arctic-silvering of the remnants of the diode into a make-shift module. The cooling is nowhere near as good as a typical diode (like a 9mm diode, etc) pressed into a module, so I decided that it made sense to use the diode in a build that itself would never require long runtimes. The Photino was an obvious choice. Impared as the diode's thermal handling may have been, that became irrelevent when built into a Photino, which isn't intended for any sort of meaningful run time. For reference, the entire completed Photino 465nm build (that's host, diode, cells, driver, module, lens, etc) weights 35 grams (about 1.2 oz).

Driven at 4A (a little bit under the 4.4A I tested it at in that thread), I'm getting around 465nm, increasing to 468nm as it heats up, which it does very quickly. With an output of around 4.5W and wavelength of 465nm, this might be one of the brighter (brightest?) portable blue builds out there. It's a beautiful color and power combination. The build required an entire redesign of the internal driver. The new design is theoretically capable of around 5.5A of constant current, triggered by a tactile switch, with soft-ish start. That said, even 25C 120mAh LiPos have their limits (one of which is, obviously, a ~3A current draw limit). With 2x cells, the buck can handle driving the diode at 4A, but that's probably nearing the limit of this nano-sized form factor.

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https://www.youtube.com/watch?v=bjWSXqzwdaw&feature=youtu.be
 

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Sigurthr

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Re: A new "Photino" 465nm @ 4.5W

Beautiful! I didn't realize you had more of these hosts.

Btw, any update on the rgb?
 

RYDorDIE278

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Re: A new "Photino" 465nm @ 4.5W

Ohh whoa!
how does it feel to own that Powerful 460~~nm diode pumping out that much juice in a pocket "photino"?

can you describe the beam specs and divergence with the attached lens? is the divergence similar to any of the diodes we use today?
 

rhd

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Re: A new "Photino" 465nm @ 4.5W

Ohh whoa!
how does it feel to own that Powerful 460~~nm diode pumping out that much juice in a pocket "photino"?

can you describe the beam specs and divergence with the attached lens? is the divergence similar to any of the diodes we use today?

The beam specs are a bit worse than typical 445s. Somewhere between a 445 and a Mits 500 (but not quite that bad)
 

Atomicrox

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Re: A new "Photino" 465nm @ 4.5W

Fantastic work once again!

Do you find the beam brighter than the 520 Photino?
 

crazyspaz

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Re: A new "Photino" 465nm @ 4.5W

The beam specs are a bit worse than typical 445s. Somewhere between a 445 and a Mits 500 (but not quite that bad)

Is that using the standard AR coated glass lens, or the lens from the module? It would be pretty sweet if those modules had an AR coated aspheric in them to boot, kinda like the BenQ projectors.
 

rhd

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Re: A new "Photino" 465nm @ 4.5W

Fantastic work once again!

Do you find the beam brighter than the 520 Photino?

I'm having a lot of trouble comparing due to the different color and beam characteristics. I'm not really sure I can come to a conclusion one way or the other versus a 1.6W 520nm.


Is that using the standard AR coated glass lens, or the lens from the module? It would be pretty sweet if those modules had an AR coated aspheric in them to boot, kinda like the BenQ projectors.

Standard G9
 

Shakenawake

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Re: A new "Photino" 465nm @ 4.5W

I'm having a lot of trouble comparing due to the different color and beam characteristics. I'm not really sure I can come to a conclusion one way or the other versus a 1.6W 520nm.

I know the feeling, with my 4.8W 445 and my 1W 520

the way I finally decided was this. In a totally dark room, turn them on one at a time. which one illuminates the room better for you? for me the green won out, just barely
 
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Atomicrox

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Re: A new "Photino" 465nm @ 4.5W

That's a good way to compare dot brightness but it doesn't work for beams because of scattering. If the green won just barely on the illumination it's likely the blue would win (or tie) beam-wise.
 
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rhd

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Re: A new "Photino" 465nm @ 4.5W

I've decided the 4.5W 465nm is brighter than the 1.6W 520.

Also, captured a shot of it peaking above 5W for a few seconds at the beginning of its duty cycle.

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Atomicrox

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Re: A new "Photino" 465nm @ 4.5W

Interesting, now I'll have to get one eventually!
 

Sigurthr

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Re: A new "Photino" 465nm @ 4.5W

I just can't imagine the brightness level of 5watts of 465nm, heh. I've seen a 10W 532 years ago, so I know an obvious upper bound for brightness, but the jump between 2W 435nm and 5W 465nm seems unfathomable... never mind it coming out of such a tiny package!
 

VisibleGreen

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Re: A new "Photino" 465nm @ 4.5W

:eek: omg I'll have to change my name to VisibleBlue! Please keep looking for other sources of these!
 

rhd

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Re: A new "Photino" 465nm @ 4.5W

:eek: omg I'll have to change my name to VisibleBlue! Please keep looking for other sources of these!

I'm sure the source I bought mine from probably has 7 more of them sitting around, lol.
 




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