Post your random pics!

[diachi]

In Mosul today




post images

Admittedly not great quality photo's, but what I'm seeing here.

That looks crazy! Stay safe! :beer:

 

[RB astro]

Stay safe buddy and thanks for the photos.
They look like they're straight out of a movie, amazing !

 

[Astralist]

Ever seen a laser diode's die while being powered on?
check this out!

It's extremely hard to take those pics (at least for me)
LD: NUBM05

 

[Alaskan]

Cool photo's! How did you do that?

 

[Shotgundrums]

Cool photos indeed!! You win, forever!!:kewlpics:

 

[BowtieGuy]

Yes, very cool; good job! :kewlpics:

 

[Astralist]

I'll try to take a photos of LD of different wavelength, it is cool indeed

Tools needed:
1x $20 usb digital microscope
1x any diode under test
1x low power driver, which barely power up the diode at its threshold.
1x non shaky hand to hold the LD's module
1x non shaky hand to hold, move, and adjust the usb microscope
1x foot to click the mouse (to capture the pics from digital microscope) :crackup:

Yeah a bit of stupid approach, but it works lol
I could not use any holder because it will be harder to adjust the zoom/focus/movement on the fly

 

[BowtieGuy]

Fantastic, whatever works. :yh:
I thought that those diodes must be at or near the threshold.

 

[Alaskan]

Would be even cooler to put a filter on it and drive it hard enough to see a beam exiting, if that is possible.

 

[paul1598419]

Very nicely done, astralist. Since the laser is at threshold, light is already exiting the die. Even before threshold light is exiting.

 

[RedCowboy]

That's very cool astralist, + 4U when it will let me. :beer:

I also thought that would be right at threshold, but I wonder about at a little higher current through a pair of orange laser safety glasses if the scope can focus through them and not on them, the scopes lights won't be needed so that may help, also a pic of the beam exiting the can window of a NDB7875 would be interesting to see, it would be fan shaped but tiny at the high intensity exit....this could also explain a lot of the overspray, I am now thinking about a diode face mask.

I would mount a diode against a large heat sink to draw heat out the back and try to get a pic from underneath if no can or a slightly reward angle if canned.

I am inspired to order a new scope, I do wonder if this is the reason for that shadow we see? Also the wide wash of overspray.

 

[Astralist]

@ Alaskan & RedCowBoy: That's a great idea! let see if i can shoot a beam exiting a diode's die or window




BTW here is another one, LD = LPC-840

ENJOY!!!

 

[diachi]

Nice job! :beer:

 

[BowtieGuy]

That is so cool looking, thanks for sharing your work with us! :yh:

 

[DashApple]

Nice Close ups : D ,

This was my attempt with a DSLR and a short FL lens taped on the front , Laser diode is a red C Mount rated at 500mW from what I remember .

Its very blurry and only focuses on the area the lights emitting from , it was just barely above lighting up and you can just about make out the bond wires .

P1010236 by TwirlyWhirly555, on Flickr

 

[paul1598419]

Great job, astralist. You do seem to have a very steady hand.

I have used the LPC-840s a lot and have several in my stock. They have a great beam profile and divergence specs for a single mode direct diode. Seem to be good to 400 mW CW. Never ran one pulsed.