Laser pointer forums - discuss laser pointers and laser technology. Read and write laser pointer reviews. Freely discuss companies that sell laser pointers.

Laser Pointers

Welcome to Laser Pointer Forums!

Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Lasers Pointers by Power - 1 Watt+ Lasers Pointers by Power - 500mW+ Lasers Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes



Go Back   Laser Pointers > Lasers > Experiments & Modifications



green laser pointer
cnilaser
Reply
 
LinkBack Thread Tools Display Modes
Old 07-12-2010, 02:59 PM   #1
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default DIY Pre-Calibrated LPM for under $100.00....

That's right... I said No Calibration required...



We have been playing with the OPHIR 20C-A Thermopiles...
that were on sale on eBay a while back... They were new
surplus old stock heads...
I made a deal with Kenom for a few heads and have some
more from the Kenometer Lite's I purchased from him..

They are the same ones that are used on the Kenometer Pro
and USB series...

These Heads come with a preamplifier and calibration circuit
already built into the Head and comes already Calibrated to
1mV=1mW... You don't even need to calibrate them...

All you need to do is supply a split supply and a Voltmeter..
That's all.... anything else is not really required to have
a reliable calibrated Laser Power Meter...

Here is a parts list to build a ~$100.00 LPM...
(your mileage may vary)

1) 2pc 9Volt Batteries -------- $ 4.00 (we used rechargeables)
2) 1pc DPDT toggle switch --- $ 1.00
3) 1pc DMM--------------------- $10.00
4) 1pc OHPIR 20C-A head -- $40-$150 (used) ($390.00 New)

We checked the current draw from the 9Volt batteries and
with no Laser input and at 1000 mW input each battery needs
to supply only 4.7mA...
The batteries will last quite a while before needing to be
changed or recharged.

You can see the simplicity of the circuit in the pics attached and it
is easy enough to follow..
The only thing that we are not sure of is the Label on one of the
heads (see Photo). It notes the Part Number as 20C-A-1-Y....
Looking at the Data Sheet we found on line...

20C-SH_20C-A_20C.pdf

The 20C-A means it was calibrated at customer selected wavelength...
The -1 means that the output it is 1V/1W
The -Y means that the head was calibrated for YAG 1064nm

That Part Number can only go to 4 Watts Free standing and up
to 5 Watts max with some heatsinking...
If the model number were 20C-.4-Y then... with a lot more heay
sinking the heads could read up to 20 Watts..

Even though they were calibrated for 1064nm... the calibration
seems to work well for our uses...

Now all you need to do is find some OPHIR heads...
BTW... we contacted OPHIR and in quantities of 100pc we can get
them for $250.00 USD each Brand New...

(It is to be noted that the Switch as wired in the Photos is not
correct... The DPDT switch must cut both Battery supplies not
just the common as stated below.
)

Jerry

You can contact us at any time on our Website: J.BAUER Electronics

------ No Input ------ 200mW Dilda -- Serial Number
Attached Thumbnails
DIY Pre-Calibrated LPM for under 0.00....-noinput.jpg   DIY Pre-Calibrated LPM for under 0.00....-redinput.jpg   DIY Pre-Calibrated LPM for under 0.00....-s-n.jpg  
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 08-05-2013 at 11:12 AM.
lasersbee is offline   Reply With Quote












Old 07-12-2010, 03:06 PM   #2
Banned
 
Join Date: May 2010
Location: Australia
Posts: 1,362
Rep Power: 0
TTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

damit......wish i saw this before i made my lpm
and now it needs a new tec o_O
dam
so are u selling them??
TTerbo is offline   Reply With Quote
Old 07-12-2010, 03:21 PM   #3
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

No... this is just a quick project that we put together
for the Members here...
If they were for sale they would be in the B/S/T section...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-01-2012 at 12:35 PM.
lasersbee is offline   Reply With Quote
Old 07-12-2010, 03:23 PM   #4
Banned
 
Join Date: May 2010
Location: Australia
Posts: 1,362
Rep Power: 0
TTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

dam.....
i sent a useless pm to u then
TTerbo is offline   Reply With Quote
Old 07-12-2010, 03:24 PM   #5
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

N/P... I just responded to it...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-01-2012 at 12:35 PM.
lasersbee is offline   Reply With Quote
Old 07-12-2010, 10:47 PM   #6
٩(̾●̮̮̃̾•̃̾)۶ __̴ı̴̴̡&
 
rangedunits's Avatar
 
Join Date: Jan 2008
Location: Montréal, Canada
Posts: 3,591
Rep Power: 75
rangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond repute
Send a message via MSN to rangedunits
Default Re: DIY Pre-Calibrated LPM for under $100.00....

fifty dollars? i want.

How accurate are they compared to die4thing,kenometer,beemeter?
__________________
CRH-

Last edited by rangedunits; 07-12-2010 at 10:52 PM.
rangedunits is offline   Reply With Quote
Old 07-12-2010, 10:58 PM   #7
Class 3B Laser
 
Trevor's Avatar
 
Join Date: Jul 2009
Location: Blacksburg, VA
Posts: 4,336
Rep Power: 534
Trevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Quote:
Originally Posted by rangedunits View Post
fifty dollars? i want.

How accurate are they compared to die4thing,kenometer,beemeter?
It should be just as accurate. The die4thing and Laserbees are calibrated using a calibrated LPM, and Kenometers use these.

-Trevor
__________________
There's a fundamental truth to our nature. Man must explore.

Code:
23:10 <ARG>    nothing has blown up yet :)
23:10 <Trevor> that is a distressingly low standard for success
Trevor is offline   Reply With Quote
Old 07-12-2010, 11:40 PM   #8
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Quote:
Originally Posted by rangedunits View Post
fifty dollars? i want.

How accurate are they compared to die4thing,kenometer,beemeter?
They are as accurate as the calibration... One is not
more accurate than another if the calibration is done
right..

BTW... the total above is a bit higher than $50.00..
and can be over $100.00 if the OPHIR head you find
is expensive..


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-01-2012 at 12:35 PM.
lasersbee is offline   Reply With Quote
Old 07-12-2010, 11:56 PM   #9
Class 3B Laser
 
MarioMaster's Avatar
 
Join Date: Jul 2007
Location: Allentown, PA
Posts: 3,556
Rep Power: 300
MarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond repute
Send a message via AIM to MarioMaster
Default Re: DIY Pre-Calibrated LPM for under $100.00....

I would recommend getting a DPDT switch to break at least two of the power connections to the head. As it stands now there is still +18v being applied to the head, just with no ground when it is switched off.
MarioMaster is online now   Reply With Quote
Old 07-13-2010, 02:04 AM   #10
Class 4 Laser
 
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 5,314
Rep Power: 198
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Seems like a good project at a reasonable price to me. I don't know the exact specs on all its parts, but it dos seem like a nice diy build as long as the sensors are available.
__________________
Ask a Scientist <- Soon!
Ben's Electronics Projects
ScienceFlicks Science Videos <- Have a look
Benm is offline   Reply With Quote
Old 07-13-2010, 11:45 AM   #11
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Quote:
Originally Posted by MarioMaster View Post
I would recommend getting a DPDT switch to break at least two of the power connections to the head. As it stands now there is still +18v being applied to the head, just with no ground when it is switched off.
Obviously you are correct and the unit we took the pics of had
a DPDT switch installed after the pics were taken to cut the 18V
circuit... (fixed the parts list above.. )...
Good catch....


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-01-2012 at 12:36 PM.
lasersbee is offline   Reply With Quote
Old 07-13-2010, 12:01 PM   #12
Banned
 
Join Date: May 2010
Location: Australia
Posts: 1,362
Rep Power: 0
TTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

so where can we get cheap cheap ophirs?
TTerbo is offline   Reply With Quote
Old 07-13-2010, 01:42 PM   #13
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Try eBay... or do a Google search... or maybe some members here
or on other forums may have one...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-01-2012 at 12:36 PM.
lasersbee is offline   Reply With Quote
Old 07-13-2010, 01:49 PM   #14
Banned
 
Join Date: May 2010
Location: Australia
Posts: 1,362
Rep Power: 0
TTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond reputeTTerbo has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

i shall try get a TEC for my MM LPM. if its a total fail il donate it to landfill and buy one of these when (if) i get enough money
TTerbo is offline   Reply With Quote
Old 01-18-2013, 12:15 AM   #15
Class 1 Laser
 
Join Date: Jan 2013
Location: Kansas City
Posts: 83
Rep Power: 10
rbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to behold
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Yes I know, Zombie thread, but with all the talk of DIY LPM I just ordered a OPHIR 20C-A off of Ebay. At least that will give me something to measure my output with. Then maybe I can incorporate into some of the other cool projects here on the board.
rbc1225 is offline   Reply With Quote
Old 01-18-2013, 01:52 AM   #16
Class 2M Laser
 
pschlosser's Avatar
 
Join Date: Dec 2012
Location: Santa Rosa, CA
Posts: 912
Rep Power: 62
pschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond reputepschlosser has a reputation beyond repute
Angry Re: DIY Pre-Calibrated LPM for under $100.00....

boo. hiss. necro-post. I was expecting you to tell me where I can find my $100 LPM.
pschlosser is offline   Reply With Quote
Old 01-18-2013, 02:47 AM   #17
Class 1 Laser
 
Join Date: Jan 2013
Location: Kansas City
Posts: 83
Rep Power: 10
rbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to behold
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Quote:
Originally Posted by pschlosser View Post
boo. hiss. necro-post. I was expecting you to tell me where I can find my $100 LPM.
heheheh Well it is now $205.00 but you can get the OPHIR in Jerrys post here off of Ebay for $205.00. I am sure it was $100.00 a few years ago when this thread started, but you know how it is.
rbc1225 is offline   Reply With Quote
Old 01-18-2013, 10:13 AM   #18
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

It's not necroposting if you add some useful info
to the old thread like where to get some elusive
build parts for the Thread project today..


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner
lasersbee is offline   Reply With Quote
Old 01-18-2013, 11:17 AM   #19
Class 1 Laser
 
Join Date: Jan 2013
Location: Kansas City
Posts: 83
Rep Power: 10
rbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to behold
Default Re: DIY Pre-Calibrated LPM for under $100.00....

True Jerry, I agree. There are also these sensors "Ophir OEM Laser Power Meter Sensor for CO2 YAG 60W" and I know the one in the top of this thread is only good for about 5 watts but and the one I have list here is for 60w but I wasn't sure of the wavelength designations so I went ahead and just got the one you recommended in this thread. Would this one have worked as well? The part number is 150C-A-.1-C/ERB

The description says the Absorber is optimized for CO2 (10.6um) and Er:YAG (2.94um) lasers. Other CW or long pulse lasers should be OK as well (non Q-switched lasers).
__________________
"...Cheap ass people should not get into lasers!..."

Last edited by rbc1225; 01-18-2013 at 03:32 PM.
rbc1225 is offline   Reply With Quote
Old 01-18-2013, 03:40 PM   #20
Class 2 Laser
 
dmacrae's Avatar
 
Join Date: Oct 2012
Location: Ft. Myers Fl
Posts: 264
Rep Power: 47
dmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond reputedmacrae has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

I'm always on the prowl for an ophir head. bumping a useful thread like this is a good thing IMO. I wasn't actively searching for it but came across it and left with some good info.
__________________
Laser Schwag
1200mW 638nm polished minisabre v2 "Red Dragon" by Danefex
2250mW 445nm in a romisen RL-B7 host "The Romm"
2900mW Peak* custom 445nm minisabre v2+ "Scud"
by Danefex

532nm 65mW "Ghetto Greenie"
532nm 65mW pen
Uranium glow nuts

2x flaminpyro tritium focus adapters
1 mrcrouse adapter

Ophir 20C + various dmm's
Refrigeration Technician
Southside Chicago/Ft. Myers Florida
dmacrae is offline   Reply With Quote
Old 01-18-2013, 11:47 PM   #21
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Quote:
Originally Posted by rbc1225 View Post
True Jerry, I agree. There are also these sensors "Ophir OEM Laser Power Meter Sensor for CO2 YAG 60W" and I know the one in the top of this thread is only good for about 5 watts but and the one I have list here is for 60w but I wasn't sure of the wavelength designations so I went ahead and just got the one you recommended in this thread. Would this one have worked as well? The part number is 150C-A-.1-C/ERB

The description says the Absorber is optimized for CO2 (10.6um) and Er:YAG (2.94um) lasers. Other CW or long pulse lasers should be OK as well (non Q-switched lasers).
No you could not use that Head directly...
It does not output 1V/1W...
That head outputs 0.1V/W and would require a
stable and precise amplifier stage to bring it up
to 1V/1W....


Jerry

You can contact us at any time through our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner
lasersbee is offline   Reply With Quote
Old 01-19-2013, 12:31 AM   #22
Class 3B Laser
 
Trevor's Avatar
 
Join Date: Jul 2009
Location: Blacksburg, VA
Posts: 4,336
Rep Power: 534
Trevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Quote:
Originally Posted by lasersbee View Post
No you could not use that Head directly...
It does not output 1V/1W...
That head outputs 0.1V/W and would require a
stable and precise amplifier stage to bring it up
to 1V/1W....


Jerry

You can contact us at any time through our Website: J.BAUER Electronics
Alternatively, you could take note of the calibration of the sensor and calculate actual power by multiplying what the DMM displays.

Trevor
__________________
There's a fundamental truth to our nature. Man must explore.

Code:
23:10 <ARG>    nothing has blown up yet :)
23:10 <Trevor> that is a distressingly low standard for success
Trevor is offline   Reply With Quote
Old 01-19-2013, 01:18 AM   #23
Class 1 Laser
 
Join Date: Jan 2013
Location: Kansas City
Posts: 83
Rep Power: 10
rbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to beholdrbc1225 is a splendid one to behold
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Wow this is a rough forum. I get negative feedback because I revived this thread. That sort of sucks. Oh well nothing I can do about that.

My multimeter also reads millivolts so that wouldn't be a problem. What about the wavelength of the sensor?

Would it be usable in the spectrum we normally use? It indicated the absorber is for CO2 (10.6um) and Er:YAG (2.94um) lasers. Other CW or long pulse lasers should be OK as well (non Q-switched lasers).

That was my concern. I have no problem reading the output if it is reasonably accurate like the one originally recommended at the top of this thread.

It would only be good for higher power lasers though, or so it seams. I mean 5 watts gives me .5 volts instead of a full 5 to deal with on an analog input board. Is that what you mean Jerry. Our ADC if read other than directly would only be using a very low end of an analog input?
__________________
"...Cheap ass people should not get into lasers!..."

Last edited by rbc1225; 01-19-2013 at 02:29 AM.
rbc1225 is offline   Reply With Quote
Old 01-19-2013, 01:11 PM   #24
Class 4 Laser
 
lasersbee's Avatar
 
Join Date: Sep 2008
Location: 2 months of Non Stop Neg Repping By ARG-Cyp-Trevor-Jacob32123 REP SYSTEM ABUSE
Posts: 14,854
Rep Power: 451
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Quote:
Originally Posted by rbc1225 View Post
Wow this is a rough forum. I get negative feedback because I revived this thread. That sort of sucks. Oh well nothing I can do about that.

My multimeter also reads millivolts so that wouldn't be a problem. What about the wavelength of the sensor?

Would it be usable in the spectrum we normally use? It indicated the absorber is for CO2 (10.6um) and Er:YAG (2.94um) lasers. Other CW or long pulse lasers should be OK as well (non Q-switched lasers).

That was my concern. I have no problem reading the output if it is reasonably accurate like the one originally recommended at the top of this thread.

It would only be good for higher power lasers though, or so it seams. I mean 5 watts gives me .5 volts instead of a full 5 to deal with on an analog input board. Is that what you mean Jerry. Our ADC if read other than directly would only be using a very low end of an analog input?
First... don't worry about the neg rep... your Rep Powers
under your Avatar will only show once you hit 50 Posts.

Using a DMM that can only read mV would give that head
a resolution of 10mW plus ant DMM errors if the head is
still calibrated.

As I stated above to get a 1mV/1mW output from that head
with a resolution of 1mW you would need to use a stable
an precise amplifier stage.

I'm not sure if those heads are still calibrated in the visible
spectrum like the 20C heads. We've never had on in the
shop.

Quote:
Originally Posted by Trevor View Post
Alternatively, you could take note of the calibration of the sensor and calculate actual power by multiplying what the DMM displays.
I find that amusing coming from a guy that is so obsessed
with fractional readings...

Using a calculator would only multiply any values by 10
but the resolution would still be only 10mW. You can easily
do that in your head by moving the decimal point to the
right by one place.


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page


LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See then all here on LPF

LaserBee Power Meter products ALWAYS in Stock and
discounted for LPF Members....
2W LaserBee A Laser Power Meter
LaserBee 2.5W USB LPM

LaserBee 3.7W USB LPM

Available on eBay:Check availability here..

Search


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 01-19-2013 at 01:20 PM.
lasersbee is offline   Reply With Quote
Old 01-19-2013, 02:22 PM   #25
Class 3B Laser
 
Trevor's Avatar
 
Join Date: Jul 2009
Location: Blacksburg, VA
Posts: 4,336
Rep Power: 534
Trevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond reputeTrevor has a reputation beyond repute
Default Re: DIY Pre-Calibrated LPM for under $100.00....

Quote:
Originally Posted by lasersbee View Post
I find that amusing coming from a guy that is so obsessed
with fractional readings...

Using a calculator would only multiply any values by 10
but the resolution would still be only 10mW. You can easily
do that in your head by moving the decimal point to the
right by one place.


Jerry
Assuming it's calibrated to ±3%, the readings are only rated accurate to ±4.5W at the top of the range. Considering we're using 1.0 - 1.5% of that 150W range with lasers the average hobbyist has, you can't expect a lot of precision. Especially with an old surplus sensor. You've got to verify it with a known, calibrated LPM before you can even remotely trust it.

These factors taken into account, 10mW is more than enough resolution.

I thought you would know that, but I'm glad I could help you out.

Trevor
__________________
There's a fundamental truth to our nature. Man must explore.

Code:
23:10 <ARG>    nothing has blown up yet :)
23:10 <Trevor> that is a distressingly low standard for success

Last edited by Trevor; 01-19-2013 at 08:51 PM. Reason: Edited for clarity.
Trevor is offline   Reply With Quote
Reply
Database of Laser Pointer Companies



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f42/diy-pre-calibrated-lpm-under-100-00-a-52861.html
Posted By For Type Date
BUYING Power Meter This thread Refback 07-07-2011 09:08 PM
????????? This thread Refback 04-30-2011 09:01 AM
????????? This thread Refback 03-17-2011 12:49 PM








Loading


laser pointer forums top

















Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Lasers Pointers by Power - 1 Watt+ Lasers Pointers by Power - 500mW+ Lasers Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes




All times are GMT. The time now is 04:20 AM.


Powered by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2014 Laser Pointer Forums, LLC