Mitsubishi ML520G71...Red Holy Grail or Flashlight Fail ??

[Solarfire]

Glad to see people are testing these again..

The correct lenses are availabhle here:

http://hacylon.case.edu/ebay/laser_diode/Lenses.php


If desired, I can have a new run with slightly different properties optimized for red if the interest is there.

My test results were published last year, looked very promising if a 5-6mm fl collimator is used with the correction lenses.

http://www.photonlexicon.com/forums/...ode-properties

Hey Andrew good to have you chime in here. Actually your cylinders couldn’t be any better in terms of loss, during testing I only lost 3% on the cylinders. The magnification could be a little higher; around 5x would be good with a 4mm fl collimator.

[drlava]

That's cool, I could definitely get a 5 or 5.5x set done.. This would then work with the common 4mm broadband lenses.

Are these diodes really available for $70 now?

[logsquared]

Has anyone tried the lava cylinders placed 100mm to 150mm from the diode? I am guessing this will give the correct magnification. My cylinders are giving me around 20% loss. If the lava cylinders work with 3% loss then $40 is a good price, even if you have to move them away from the diode.

[andyf97]

The data sheets for easy comparing.

Attachment 27855

Attachment 27856

[steve-o]

That's cool, I could definitely get a 5 or 5.5x set done.. This would then work with the common 4mm broadband lenses.

Are these diodes really available for $70 now?

The 300mW are $67 or less now, yes. The 500mW just came out - $199 , both are available from O-like.

http://www.o-like.com/index.php?main...v0oh2pqbe6r266

[DTR]

Are these diodes really available for $70 now?

I also have the 300mW units in stock with a 2-3 day shipping in the US for $69.
http://www.photonlexicon.com/forums/...-LEDs-amp-More

[Solarfire]

Ok.. One more to sum it up.
Test diode 315mW raw output power @400mW
Optima collimator f=4mm,NA0.5
aperture beam size 0.5mm x 4mm
beam @ 11m 95mm x 8mm
divergence 8.59mrad
Power output @ 400mA = 310mW, @ 500mA = 405mW = 98.4% throughput
Drlava’s cylinders correction.
aperture beam size 2mm x 4mm
beam @ 11m 30mm x 8mm
divergence 2.55mrad
Power output @ 400mA = 295mW, @ 500mA = 391mW = 93.6% overall throughput
The lava cylinders appear to have a magnification >3x, neccesary would be around 6x (1.43mrad) - 8x (1.07mrad)

[andyf97]

I wish you would put extra lines between each test, makes reading much easier.

Test diode 315mW raw output power @400mW

Optima collimator f=4mm,NA0.5
aperture beam size 0.5mm x 4mm
beam @ 11m 95mm x 8mm
divergence 8.59mrad
Power output @ 400mA = 310mW, @ 500mA = 405mW = 98.4% throughput

Drlava’s cylinders correction.
aperture beam size 2mm x 4mm
beam @ 11m 30mm x 8mm
divergence 2.55mrad
Power output @ 400mA = 295mW, @ 500mA = 391mW = 93.6% overall throughput

The lava cylinders appear to have a magnification >3x, neccesary would be around 6x (1.43mrad) - 8x (1.07mrad)


Interesting result there, with both lens setups your line width is similar, I think this is a good sign meaning you only need to work on one axiz.

One thing here, how you can say the divergence is as you result when the beam is not round, your divergence must be on two planes, are you referring to the larger angle only?





.

[steve-o]

I was just thinking to myself how this is funny, I started out with an 8 mW 632.8 hene and thought that it was the coolest thing since sliced bread and now I'm bitchin' about losing 20% of 250mW on optics .. hehe ..

[andyf97]

I was just thinking to myself how this is funny, I started out with an 8 mW 632.8 hene and thought that it was the coolest thing since sliced bread and now I'm bitchin' about losing 20% of 250mW on optics .. hehe ..

I started out with an 18mW in 1992, I paid for it around 3,000 dollars. Thought it was amazing.