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- Apr 12, 2012
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As my 473nm DOHM 100mw DPSS laser arrived the other day i thought I would do a comparison between my "blues".
Funny how the eyes work- my 488nm Argon had always looked pale "Sky Blue" turquoise to my eyes. When I put it next to the 473nm it looked very almost green rather than turquoise!
Here is the 473 next to the 488.
Here are the pattern comparisons. VERY hard to do this without classes as the camera over exposes. I shut the aperture down all the way and sped the shutter right up. In the end i used my glasses over the lens.
Note the 473 is no way near TEM-0. I suspect the optics or the crystal have been knocked out of alignment slightly. I am interested in talking to anyone with suggestions before I attempt it on my own. I understand the crystal alignment is very hard to do?
WITH glasses
Here are all of my "Blue's" I have right now.
Left to right:
405nm PHR-803 diode in Ultrafire C3 host,
445nm A140 1.5W in Ultrafire W501B Host
473nm DPSS DOHM 100mw Labby
488nm single line Uniphase Argon laser
When you look at the beams the camera gets wiped out by the brightness of the high power 445, so much so that you can't even see the poor 405nm on the left hand end. The red LED on the PSU is brighter!
Here are the beam patterns!
First without filtering (my poor CCD!)
L to R:
488nm Argon, 445nm 1.5W, 473nm Labby, and the poor spot to the right and up is the 405nm PHR.
Now with filtering!
L to R:
488nm Argon, 473nm Labby, 445nm 1.5W (you can clearly see the elongated multimode diode beam) and the tiny spot to the right and up is the 405nm PHR.
Funny how the eyes work- my 488nm Argon had always looked pale "Sky Blue" turquoise to my eyes. When I put it next to the 473nm it looked very almost green rather than turquoise!
Here is the 473 next to the 488.
Here are the pattern comparisons. VERY hard to do this without classes as the camera over exposes. I shut the aperture down all the way and sped the shutter right up. In the end i used my glasses over the lens.
Note the 473 is no way near TEM-0. I suspect the optics or the crystal have been knocked out of alignment slightly. I am interested in talking to anyone with suggestions before I attempt it on my own. I understand the crystal alignment is very hard to do?
WITH glasses
Here are all of my "Blue's" I have right now.
Left to right:
405nm PHR-803 diode in Ultrafire C3 host,
445nm A140 1.5W in Ultrafire W501B Host
473nm DPSS DOHM 100mw Labby
488nm single line Uniphase Argon laser
When you look at the beams the camera gets wiped out by the brightness of the high power 445, so much so that you can't even see the poor 405nm on the left hand end. The red LED on the PSU is brighter!
Here are the beam patterns!
First without filtering (my poor CCD!)
L to R:
488nm Argon, 445nm 1.5W, 473nm Labby, and the poor spot to the right and up is the 405nm PHR.
Now with filtering!
L to R:
488nm Argon, 473nm Labby, 445nm 1.5W (you can clearly see the elongated multimode diode beam) and the tiny spot to the right and up is the 405nm PHR.
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