Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



2W Ophir Head LPM from Bluefan

regalis

New member
Joined
Jul 15, 2011
Messages
501
Points
0
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, 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:



InfinitusEquitas

Well-known member
Joined
Mar 27, 2011
Messages
15,580
Points
113
Very nice response times!

And the module isn't bad at all either. Would have expected a lot more IR...
 

regalis

New member
Joined
Jul 15, 2011
Messages
501
Points
0
Yeah i love the response times and i'd had also expected much more IR from the ebay module...nice green :) :cheers:
 

lasersbee

Well-known member
Joined
Sep 20, 2008
Messages
17,628
Points
113
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!?
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:

regalis

New member
Joined
Jul 15, 2011
Messages
501
Points
0
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:

lasersbee

Well-known member
Joined
Sep 20, 2008
Messages
17,628
Points
113
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
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
 

regalis

New member
Joined
Jul 15, 2011
Messages
501
Points
0
Good to know!
I just updated the OP with your information..thx :beer:
 

Bluefan

New member
Joined
Aug 15, 2009
Messages
1,482
Points
0
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.
 

Wolfman29

Well-known member
Joined
Jan 14, 2011
Messages
3,828
Points
63
Yeah - I love this little thing... especially because it's already calibrated.
 







Top