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Bob_Boyce

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Hi, Thats awesome GSS so the Sanwu LPM isn't bad at all for the price as an entry level LPM.
Crackula should be happy with the results IMO.
Good job GSS I would be pleased also with the readings.
A Ophire power head is way more pricy that the Sanwu but like I said not bad for a starter LPM.
Its not like were building high end space lasers
Rich:)
I tested using one of my Ophir head LPMs. I have the head heatsinked and always zeroed it prior to measurements. I built my LPMs myself.
 



GSS

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I just re read one of your posts.
You swapped out the lens? Did you put a G2 in it?
 

Lifetime17

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I tested using one of my Ophir head LPMs. I have the head heatsinked and always zeroed it prior to measurements. I built my LPMs myself.
Hi,,
Do you have any pics of your LPM's?? And if you do can we see it in operation measuring a wave length .
Rich:)
 
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Bob_Boyce

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Hi,,
Do you have any pics of your LPM's?? And if you do can we see it in operation measuring a wave length .
Rich:)
I had posted pics of my LPM design on here many years ago. I had externally black powdercoated aluminum cases fabricated, and had sent boxloads of them to Kenom after sending him the majority of the Ophir heads that I had bought... He chose to use a different design that lacked the ADC resolution to fully support the higher resolution and maximum power capabilities of the factory pre-calibrated Ophir heads that I had purchased. I did not support that choice. So most of those Ophir heads that I had purchased and sent to Kenom were wasted on hobby grade LPMs that had to use firmware to interpret and average the readings rather than display actual raw readings from the head. I recently found the last box of those Ophir heads. I had refused to mail those out after losing so much $ on that whole deal. I was not repaid for my significant investment in buying a large number of those Ophir heads.

Bob
 
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Snecho

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I had posted pics of my LPM design on here many years ago. I had externally black powdercoated aluminum cases fabricated, and had sent boxloads of them to Kenom after sending him the majority of the Ophir heads that I had bought... He chose to use a different design that lacked the ADC resolution to fully support the higher resolution and maximum power capabilities of the factory pre-calibrated Ophir heads that I had purchased. I did not support that choice. So most of those Ophir heads that I had purchased and sent to Kenom were wasted on hobby grade LPMs that had to use firmware to interpret and average the readings rather than display actual raw readings from the head. I recently found the last box of those Ophir heads. I had refused to mail those out after losing so much $ on that whole deal. I was not repaid for my significant investment in buying a large number of those Ophir heads.

Bob
Maybe I misread something, but correct me if I'm wrong. You have a box of Ophir heads you don't use? o_O
 

Lifetime17

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Hi, Think he said he bought them years ago and I think from what I heard over the years is that basically he was ripped off by the buyer.
Some one may chime in im sure many vets remember .
Rich:)
 

Bob_Boyce

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Maybe I misread something, but correct me if I'm wrong. You have a box of Ophir heads you don't use? o_O
Correct. I built one LPM and sent the rest of those very nice LPM cases to Kenom so he could use them to build LPMs to sell so he could repay me. He ended up selling the plastic cased hobby LPMs instead and I was not repaid. Rather than send off the last of the heads to Kenom and lose even more $, I sold some off to members here, then put the rest away for safekeeping. While sorting through some boxes a couple of months ago, I found that last box of Ophir heads. I wish I had some of the aluminum cases to build them with. They used calibrated regulated +/- power supplies with matching output voltages to keep the head output truly linear, as designed. The aluminum case was the heatsink for the head so that it could measure higher powered lasers for longer duration without drift.
 
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Lifetime17

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Correct. I built one LPM and sent the rest of those very nice LPM cases to Kenom so he could use them to build LPMs to sell so he could repay me. He ended up selling the plastic cased hobby LPMs instead and I was not repaid. Rather than send off the last of the heads to Kenom and lose even more $, I sold some off to members here, then put the rest away for safekeeping. While sorting through some boxes a couple of months ago, I found that last box of Ophir heads. I wish I had some of the aluminum cases to build them with. They used calibrated regulated +/- power supplies with matching output voltages to keep the head output truly linear, as designed. The aluminum case was the heatsink for the head so that it could measure higher powered lasers for longer duration without drift.
Hi,
I heard a few stories pertaining to the buy and sell deal. Glad you clarified ...
Rich:)
 




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