Laserbee vs 405nm

[Frehal]

Hi everyone!
I've just measured my lasers and found out that some of them are really great, but some are not. I got a Laserbee I + Thermopile sensor and as I've red it will handle 405nm but it seems mine won't. Maybe its because of the laserdiode maybe not. I have pushed that just over 120mA (5v) but it won't show on the display. 405nm (PHR803T) is focused with a regular axis acryl lens and I supossed it would reach at least 80mw. What is wrong, do you think?

Kind regards,
Fredrik

[allthatwhichis]

I assume you PM'd Jerry about this and you would like more input from a broader group of specialists?

Again, assuming you have spoken with Jerry; what did he day? I would consider him an expert on both the 405nm diode and the meter you have.

Once we know what his diagnosis is we can determine if another avenue of inquiry is needed; just so we don't waste time coming to the same conclusion he has.

Don't take the above the wrong way; I just finished re-reading the Ultimate "Guide" again and my specialty is sarcasm...

And...

[Frehal]

Please "allthatwhichis"... why couldn't you just being kind and tell me that I should write Jerry a PM (insted of your sarcasm). Im looking for some help in this problem that I couldn't figure out self, so please be more polite. I haven't got any cool camera (just a bad in my mobil) but I gave it a shot and took some pictures.

http://photonlexicon.com/gallery/v/u...l/405+problem/

[lasersbee]

I just replied to your PM...
If the Display shows the power of your other lasers..
then it should show the power of your 405nm laser if it is
outputting more than 5mW...

If the LCD displays 0mW... then the Thermopile hasn't
recieved enough heat energy to display a result..

What is the DSC00901 picture of...
Is it the laser beam dot on a wall or a picture looking at
the laser from the front...

From the pictures... is the yellow wire coming from the
Thermopile connected to the Left ... Center... or Right
terminal of the Green 3 pin Terminal Block on the LaserBee I
PCB...

Did you measure 120ma in series with your Blu-Ray LD or with
a Dummy Test load......


Jerry

[Frehal]

What is the DSC00901 picture of...
Is it the laser beam dot on a wall or a picture looking at
the laser from the front...

It's a dot on the wall. Sorry that I haven't discribe whats on the photos. I'll make it now.

From the pictures... is the yellow wire coming from the
Thermopile connected to the Left ... Center... or Right
terminal of the Green 3 pin Terminal Block on the LaserBee I
PCB...

Can't tell now (don't have it near) how it looks on the thermopile but Im sure yellow is for signal and brown/red is for gnd.

Did you measure 120ma in series with your Blu-Ray LD or with
a Dummy Test load......

I measured it first (with a multimeter) from the laser driver, then turned it off and placed the laserdiode last.

/Fredrik

[Psi]

Seems to me that the diode might be stuffed.
The dot in those pics looks pretty dim for a diode running at 120mA, even a 405nm one.

When my bluray diode died it went dim but stil lasered.

[Frehal]

Seems to me that the diode might be stuffed.
The dot in those pics looks pretty dim for a diode running at 120mA, even a 405nm one.

When my bluray diode died it went dim but stil lasered.

Ah, that could explain a lot.. It feels pretty dull and hard to see in totaly darkness. I can focus the the beam a bit but not like my other lasers.
Too bad, I guess.

[lasersbee]

Hey Frehal...

I would also say that your 405nm Blu-Ray diode has been damaged and it
is not producing enough energy for your LaserBee I Thermopile to detect...
or at least not >4mW

The connection of the LaserBee I Thermopile to the LaserBee I PCB seems
to be connected correctly.... since it does read your other lasers...

I have a 50mW 405nm Blu-Ray in the shop for testing purposes and it burns
(smokes) wooden clothes pins.... I can easily see it in daylight indoors...

BTW... testing the out put directly without a Test Load will falsify the current
reading just a bit...
Your problem may lie in the fact that Laser Drivers usually have a filter capacitor
across the output.. and if you do not short the output before connecting your
405nm LD.. the surge will most likely damage your Laser Diode...

The 405nm LDs are known to be very sensitive to surges....spikes...and
transients...


Jerry

[Frehal]

We learn every day, failures may be hard to take but surely it point us in right direction, isn't it right!? I mean, in my position it could be worse.
Next time I will make sure that the driver is safe connecting to.
Thanks Psi, allthatwhichis for the help.. and a special thanks to Lasersbee who is awesome!
Take care!
/Fredrik

[Doc]

Please "allthatwhichis"... why couldn't you just being kind and tell me that I should write Jerry a PM (insted of your sarcasm). Im looking for some help in this problem that I couldn't figure out self, so please be more polite. I haven't got any cool camera (just a bad in my mobil) but I gave it a shot and took some pictures.

http://photonlexicon.com/gallery/v/u...l/405+problem/

Frehal, I believe that you have mistaken Allthat's friendly banter. Sarcasm - yes, malicious - no.

Ian