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FrozenGate by Avery

Laser diode pictures - HIGH magnification

wbayw

wbayw

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Jan 12, 2010
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Hi,

I have made some picture from a Rayfoss laserdiode. It is a red (650 nm) diode.
The highest magnification is 1000x.
I hope somebody will like it!
Check the attachment! :yh:
 

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Dude. This is incredible. Never seen such a clear picture of the emitter before.
 
Awesome job!!!

What are you using to take the images? Microscope I would imagine?

+1 for awesome pics!
 
I used a digital microscope with depth up compensation. Magnification range is 20-1000x.
By the way the original picture size is 1600x1200.
 
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Cool Photos! Thanks for posting these!

+1

-Tyler

EDIT:

I'm now noticing that the OC end of the emitter is cleaved off at an angle. I'm used to seeing those at a perpendicular angle.

Would that be a "brewster window" of sorts?
 
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High magnification comes with very shallow depth of field. That is inherent with macrophotography. That is just the law of physics or in this case optics.
 
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Nice photos. :beer:

bobhaha said:
Best I can do with my camera... but notice lack of depth of field...
Click to expand...

What kind of a camera do you have? Can you fix a focusing distance? Thus you could move a camera and shoot many photos. Try with a smaller aperture to increase depth (and loose sharpness)
 
Canon Rebel T3i (600D)

I can't reduce aperture as the lens is mounted backwards for macro photography.

Focus was set at 18mm
 
Remember the emitting area is only ~1x2 microns. It's just a teeny area in the top-center. None of that blue area actually "lights up." Run it at a few mA and you should see exactly where it is.

@Meatball, I think it's just the angle you're looking at it that's playing tricks on you. Brewster angle would let through almost all light, and would make for an inherently poor OC.
 
These pictures was done by a very good digital microscope. It has an internal step engine. It can move up and down by microns in the finest step. I can set the lower and upper limit, where the microscope will do multiple images. These images are put together so that the part with highest contrast will remain. That is why I can do such sharp image. If I would take only one picture, only 1-2 cm would be sharp.
The green area - what you see in the pictures - is about 100 um wide.
 
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very nice pictures of this LOC, lately i have been seeing some really nice photography skills from LPF'ers

cheers!
 
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