My lasers.

mike666 · Nov 10, 2008

Here is a photo of my two 5mW lasers. They look a bit lame compared to some powerful lasers on here

.
One is on it's way out now and is much dimmer than the other.

The photo was taken with a half second exposure and a bit of smoke helped too.

In a few weeks I will be getting two 50mW greenies. I'll take pics when they arrive.

daguin · Nov 10, 2008

There is no such thing as a bad beam shot

Thanks

Peace,
dave

Liberty1992 · Nov 10, 2008

daguin said:
There is no such thing as a bad beam shot

Thanks

Peace,
dave

i agree, especially for red beam shots those are pretty good, what are the specs on em? the one on the left looks to be more powerful than the right, but that could also be because of the angle

mike666 · Nov 10, 2008

Liberty1992 said:
i agree, especially for red beam shots those are pretty good, what are the specs on em? the one on the left looks to be more powerful than the right, but that could also be because of the angle

They are both 670nm 5mW lasers.
The one on the right is the one that I thought was on it's way out. However after using it again after taking the photo, I found that it is getting hotter than the other one does.
After it had cooled down the beam was just like the other is.
I am now looking for a heatsink to fit the LD modules to help disipate the heat.
Both laser run off a 9v PP3 battery. They are also stripped down to their bare componates because I have to fit them into new housings.

diachi · Nov 10, 2008

mike666 said:
[quote author=Liberty1992 link=1226336361/0#2 date=1226337845]i agree, especially for red beam shots those are pretty good, what are the specs on em? the one on the left looks to be more powerful than the right, but that could also be because of the angle

They are both 670nm 5mW lasers.
The one on the right is the one that I thought was on it's way out. However after using it again after taking the photo, I found that it is getting hotter than the other one does.
After it had cooled down the beam was just like the other is.
I am now looking for a heatsink to fit the LD modules to help disipate the heat.
Both laser run off a 9v PP3 battery. They are also stripped down to their bare componates because I have to fit them into new housings.[/quote]

I doubt they are 670nm unless they are DPSS ? are they ? I don't know of any diode lasers that are 670nm.

Nice photos though, especially considering that they are only 5mW !

-Adam

Liberty1992 · Nov 10, 2008

Diachi said:
[quote author=mike666 link=1226336361/0#3 date=1226346272][quote author=Liberty1992 link=1226336361/0#2 date=1226337845]i agree, especially for red beam shots those are pretty good, what are the specs on em? the one on the left looks to be more powerful than the right, but that could also be because of the angle

Nice photos though, especially considering that they are only 5mW !
-Adam[/quote]
yea no kidding, i was thinking maybe some of the DVD burner diodes, but nope i was wrong

diachi · Nov 10, 2008

Liberty1992 said:
[quote author=Diachi link=1226336361/0#4 date=1226352132][quote author=mike666 link=1226336361/0#3 date=1226346272][quote author=Liberty1992 link=1226336361/0#2 date=1226337845]i agree, especially for red beam shots those are pretty good, what are the specs on em? the one on the left looks to be more powerful than the right, but that could also be because of the angle

Nice photos though, especially considering that they are only 5mW !
-Adam[/quote]
yea no kidding, i was thinking maybe some of the DVD burner diodes, but nope i was wrong[/quote]

there probably are diodes at 670nm, but they won't be the type that are produced in mass quantities and probably cost in the thousands of dollars, since not that many get made, 635, 650-660 are probably the most common in the way of red diode lasers.

-Adam

mike666 · Nov 10, 2008

I am assuming that they are 670nm because on one of the cases there is a very small 670, then something that is either a n or m. The letter (or letters if there was two) have worn away over the years.
So it's either 670n or 670m but not 670nm.
It's only on one case though the other has worn away completely :

Their power output is definately 5mW though.

I got them both from Maplin Electronics years ago. Unfortunately they don't sell them anymore so I can't get the true specs on them.

diachi · Nov 10, 2008

mike666 said:
I am assuming that they are 670nm because on the case there is a very small 670, then something that is either a n or m. The letter (or letters if there was two) have worn away over the years.
So it's either 670n or 670m but not 670nm.

The power output is definatly 5mW though.

I got them both from Maplin Electronics years ago. Unfortunately they don't sell them anymore so I can't get the true specs on them.

They only sell two types of lasers now, they used to sell a few different types. If it is 670nm, it's probably the manufacturer has mislabeled it .

-Adam

Things · Nov 10, 2008

Yeah looks like 635-660nm to me, 670nm is a really deep blood red.

mike666 · Nov 10, 2008

I just looked and Maplin have this one (the only one I could find). It is also a 670nm laser.
http://www.maplin.co.uk/module.aspx?moduleno=11712

My two lasers have a similar casing, but are 5mW.

diachi · Nov 10, 2008

mike666 said:
I just looked and Maplin have this one (the only one I could find). It is also a 670nm laser.
http://www.maplin.co.uk/module.aspx?moduleno=11712

My two lasers have a similar casing, but are 5mW.

Hmm thats strange, I dunno, maybe the manufacturer gave them the wrong quote, 670nm with a power less than 0.99mW is gonna be REALLY pointlessly dim.

-Adam

mike666 · Nov 10, 2008

Things said:
Yeah looks like 635-660nm to me, 670nm is a really deep blood red.

The lasers are rather deep in colour. The photo did make them a bit 'redder' than they really are.

mike666 · Nov 10, 2008

Diachi said:
Hmm thats strange, I dunno, maybe the manufacturer gave them the wrong quote, 670nm with a power less than 0.99mW is gonna be REALLY pointlessly dim.

-Adam

Yeah I too thought that Maplin laser would be rather, well, crap at that power and wavelength.

The stated wavelength could be a manufacturer error or just a typo, but seeing as there is a 670 on my laser casing I have to assume it is 670nm.
Unless there was a batch of these made that were marked wrong and the wrong specs were also given to Maplin. God knows.

Shame they don't sell them now though. They cost me about £40 each back when I was 16yrs old (24 years ago now). I wonder what they would sell for now, that's even if they are still made.

Cyparagon · Nov 11, 2008

mike666 said:
I got them both from Maplin Electronics years ago.

That explains it. The older ones were all 670. I'm not sure why, (perhaps the thermal stability issue?) but diode lasers are almost always rounded to a multiple of 5.

405, 635, 640, 650, 660, 670, 780, 808, 980 to name a few. Actual wavelengths are likely to be
407, 639, 642, 658, etc.

While DPSS is never rounded. 532 473 556 671...

Things said:
670nm is a really deep blood red.

Firstly, cameras have a hard enough time distinguishing blue from violet let alone 10nm in the red spectrum. Secondly, have you seen frothy's 671 laser? I'm sure he can tell you. It's not really any deeper than a 660. Remember this is a difference of 12nm. Many can't tell the difference between 635 and 658, and that's double the difference. Not only that, but all reds after a certain point don't get any deeper. 780 probably looks identical in color (not power or brightness) to a ruby laser.

mike666 · Nov 11, 2008

Cyparagon said:
[quote author=mike666 link=1226336361/0#7 date=1226353931]
I got them both from Maplin Electronics years ago.

That explains it. The older ones were all 670. [/quote]

Ah right. It has to be 670nm then.
I'm not bothered anyway. It looks nice.

My lasers.

mike666

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