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FrozenGate by Avery

5 Watt Laser Power Meter

Re: New 5 Watt Laser Power Meter

It is a great meter
Glad you like it!!

Thanks!!
 





Re: New 5 Watt Laser Power Meter

Hello Everyone,

I got my Nospin meter a few days ago. You've already seen the pictures and the reviews are correct so I won't go into all that stuff.

I like the meter, yes it does look like a clock radio :-) but it works great for the money. The box is pretty good, it's metal and pretty stiff for it's thickness. If the box only came in woodgrain I can see why Nospin used it.

The only thing I can add to whats already been posted about this meter is a video showing it's response.

Here it is reading a 5mw red and a 150mw green. Both lasers are right on spec. The reason I put this up was to show it's repeatability.

YouTube - powermeter.avi

I'll be taking it to a friends place to check it against his Coherent meter later this week but it certainly looks like its working properly.

I made a cover to protect my sensor. If anybody else gets this meter I would suggest you put a cover on it too. It's brand new, you don't want to mess it up.
 

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Re: New 5 Watt Laser Power Meter

I am just as impressed that fatboy55's lasers are exactly on spec. Also, I found that a breeze from open windows in the room can skew the measurements +1 or +2 mW. I also found that a very hot room, 80 degrees F or above, will also add 1 or 2 mW to the reading. However, once I moved the LPM into a colder room (about 75 degrees F) with no windows the errors went away. What's weird is that really cold temperatures don't affect the LPM at all while only slightly hot temperatures do. Does anyone else experience the same thing?

The errors are completely understandable though. I know that temperature can affect the resistance of the various electrical components inside the LPM.
 
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Re: New 5 Watt Laser Power Meter

laser_freak said:
I am just as impressed that fatboy55's lasers are exactly on spec.
Click to expand...

So was I. I knew the 5 was and really the 150 isn't. Sometimes it's lower or higher, it's a piece of junk. I just got lucky when I did the video.

I'm sure if I did it 5 min before or after it wouldn't have been 150.

I thought about reshooting it as some people would think I faked it but being on spec is too cool to not post even if it was just luck.

I'll post the results after I compare it to the coherent.
 
Re: New 5 Watt Laser Power Meter

Nice test Video...I would have preferred a red Laser since
they are known to be more stable...
Although I have a few green Labbies that are quite stable
after they warm up.
As was stated... If the OHPIR Head's Internal circuit is
Zeroed at (lets say) 25 deg C... the LPM will drop to zero
around that same calibration temperature almost every time
without ant other external influences...:cool:

Jerry
 
Re: New 5 Watt Laser Power Meter

archeometry

Your meter is shipped priority mail today
let me know when you receive it

Thanks again!
 
Most impressive work, Nospin....KUDOS ! As an FYI (not sure if it is relevant or not) Coherent includes a "customizable sensor cover" with their top-of-the-line meters....IT'S A CAN COOZIE ! Yeah, a "thermal cover" for the sensor is actually a can-blanket. You slide it over the sensor's head and trim it to fit. They couldn't be bothered on their $2000 + meter to trim the freaking cover first. WOW. You MAY wanna try to see if one would prevent the issues with thermal drift ! Post your results, if you have time to try this, thanks :)///Greg
 
Hey Analogue

Your meter is on its way
Let me know when you get it

Enjoy!
 
nospin said:
CoherentRays

Your Blue LPM is on its way

Thanks again!
Click to expand...

Wow, How'd you do that.:D

I ordered the meter Friday morning and Monday morning, three days later, I find the meter in my P.O. box.

I've already found out that several lasers that I thought might be about 5 mW are probably only about one or two mW. And a greenie that I thought was about 50 mW reads pretty constantly at 22 mW. It's good to know that actual power of these pointers. And I'll be glad to have the meter for when my Jetlaser arrives.

Thanks,

Ed
 
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