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FrozenGate by Avery

2W Ophir Head LPM from Bluefan

regalis

regalis

0
Joined
Jul 15, 2011
Messages
475
Points
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Hi,
yesterday i made some videos of my new Ophir Head LPM which i bought from Bluefan.
This is how it looks like:
27zf4ld.jpg


The LPM runs of two 9V batteries, for the Dual Rail configuration the OPHIR head needs(thx @ lasersbee for the heads-up). From one battery the power for the 2.000 counts (2W max) display is gattered.
It is the 20C-A Ophir head with some custom wiring.
Here are the specs for this head:



And now i let the videos do the talk! ;)

First i tested it with my 1.2W 445nm Survivallaser I: Ophir Head - 445nm repsonse time - YouTube


15mW 532nm NewWish Pen: Ophir Head - 532nm IR leakage - YouTube


78mW 532nm ebay module: Ophir Head - 532nm repsonse time and IR leakage - YouTube


65mW 660nm Rayfoss Laser: Ophir Head - 660nm repsonse time - YouTube


I would be happy to answer all your questions. So please feel free to ask!
Thanks for watching and i hope you like my little review!?
 
Last edited:





Very nice response times!

And the module isn't bad at all either. Would have expected a lot more IR...
 
Yeah i love the response times and i'd had also expected much more IR from the ebay module...nice green :) :cheers:
 
regalis said:
Hi,
yesterday i made some videos of my new Ophir Head LPM which i bought from Bluefan.
This is how it looks like:

The LPM runs of two 9V batteries, one to power the 2.000 counts (2W max) display and one for powering the Ophir Head.
It is the 20C-A Ophir head with some custom wiring.

I would be happy to answer all your questions. So please feel free to ask!
Thanks for watching and i hope you like my little review!?
Click to expand...

Nice review of your new LPM...:yh:
Did you build the circuit...???

Just to clarify for anyone that may want to build the same...

It requires two (2) 9V batteries in a Dual Rail configuration to
run the OPHIR Head correctly..

If your DPM does not draw too much current then you can
tap off of one of the two batteries (which is what I see here)
That will cause that one battery to drain faster than the other.

If your readings start getting strange it may be due to that
one battery's voltage dropping too low and unbalancing the
Dual Rail required by the OPHIR Head.

BTW... If you connect a compatible 4-1/2 digit DPM.. your OPHIR
Head will read up to 5W... ;)


Jerry
 
Last edited:
First, Thanks for your input :)

@Lasersbee:
I didn't built it myself; i bought it from bluefan.
I have no idea what dual rail means.. :thinking:
But thanks for pointing that out!

Btw: i know that the head is capable of a higher measuring range but 2W is more than suitable for my needs :beer:
If you attach active cooling you can measure a maximum of 20W
 
Last edited:
regalis said:
First, Thanks for your input :)

@Lasersbee:
I didn't built it myself; i bought it from bluefan.
I have no idea what dual rail means.. :thinking:
But thanks for pointing that out!

Btw: i know that the head is capable of a higher measuring range but 2W is more than suitable for my needs :beer:
If you attach active cooling you can measure a maximum of 20W
Click to expand...

Dual rail means that the OHIR Head (in your LPM) requires +9V and
Common Ground connections and also -9V and Common Ground
connections.

That requires 2 separate batteries...:yh:


Jerry
 
Good to know!
I just updated the OP with your information..thx :beer:
 
Jerry is correct, the two batteries provide a symmetric voltage. The Ophir head can be powered up to +/- 18V and the output is 2V below it's input voltage, so it can only read up to 16W.
The battery drain is assymetric, but the panel meter uses a 7805 so the panel meter will go blank before the power meter can't read up to 2W anymore.
 
Yeah - I love this little thing... especially because it's already calibrated.
 
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