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>FS: Very Rare +70mW Opto RPL Blue 473nm handheld<

GooeyGus

GooeyGus

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If you feel daring, open up the top of the laser and loosen the four screws at the bottom. This loosens the entire cavity. Make note of the orientation over the diode. I would use a marker and draw a line so you know *about* where it needs to go back to. Adjust the cavity over the pump diode until you see some better power. There is no glue used in these lasers to hold the cavity down, just four screws. Over time it can move a couple of microns which WILL effect power output. Glue is bad for trying to take things apart, but for something as sensitive as cavity alignment on the pump diode, I think it should be used.

Note that this will void your warranty, but it may get you back to better numbers. I've done this with a few viasho lasers and have gotten equal or better numbers than it originally had.
 





yobresal

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I have no warranty on this laser anyway though I do not think I will be opening it up anytime soon either. Thanks for the suggestion anyway.
 
GooeyGus

GooeyGus

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Also keep in mind that the last time I inquired, Viasho's strongest portable blue laser was rated at 30mW, their website lists the strongest as 20mW. So really, anything over 30mW is well above specifications. You can contact them directly and give them the serial number to find out what the laser was rated for at their factory.

Any power output above the unit's original rating (probably 30mW) guaranteed by optotronics should be upheld by optotronics, but I guess since it is out of warranty there is not much you can do.
 
A

Arenared

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dont forget the title of the thread:

"FS: Very Rare +70mW Opto RPL Blue 473nm handheld"
 
yobresal

yobresal

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GooeyGus said:
If you feel daring, open up the top of the laser and loosen the four screws at the bottom. This loosens the entire cavity.
Click to expand...

I felt daring. I took the heatsink off but the the rest of the module is all epoxied shut in place. This is probably a security measure to prevent expensive lasers from being damaged from vibrations in transit. A simple unscrewing is as far as I am going to take it.
 
themandalorian

themandalorian

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Hey JW does CNI offer units higher than 20mw? I'm now getting wary of that website Yagoo CN because they offer a 50mw 473nm laser, I wonder how high we could get one if it was cherry picked.
 
Tech_Junkie

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Is it possible Opto put a higher mW pump diode in? Could explain a lot. Higher IR, over heating, fluctuations in mW, fast battery drain. Maybe a stupid question but you cant learn if you don't ask.
 
93shad

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what a horrible ending to sucha great story.
im pretty sure jack at optotronics would have put an IR filter on there... what does the sticker on the laser say. "optotronics RPL- what"? what rpl is on the sticker?
 
yobresal

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It says RPL 70mW and it has the other sticker on the inside of the battery tube with the serial number and rpl 70 on it. Plus it does put out probably around 60-70mW for the first cycle, it is just that it diminishes in power very quickly after the first cycle and won't go back up to full power until it has had a significant time to cool down. I wouldn't say that this story has a horrible ending. The laser is incredible, just not exactly what I expected. I personally would almost be tempted to call 70mW it's peak power because it cannot hold that output for more than 1 duty cycle. I don't know. I guess it is all in the method used to acquire the average output.
 
D

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yobresal said:
It says RPL 70mW and it has the other sticker on the inside of the battery tube with the serial number and rpl 70 on it. Plus it does put out probably around 60-70mW for the first cycle, it is just that it diminishes in power very quickly after the first cycle and won't go back up to full power until it has had a significant time to cool down. I wouldn't say that this story has a horrible ending. The laser is incredible, just not exactly what I expected. I personally would almost be tempted to call 70mW it's peak power because it cannot hold that output for more than 1 duty cycle. I don't know. I guess it is all in the method used to acquire the average output.
Click to expand...
well, then it's not that bad, but anyway the title says +70mW, if it was a green pointer I wouldn't complain, but when it comes to a 800$ blue laser, I expect the seller to be very specific on the specs!
 
styropyro

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Putting in a higher powered pump really wouldn't work for adding to the power because you still have the same crystal set as before. Just being a DPSS blue handheld explains a lot of the problems, including the IR because from what I remember IR filters aren't put into Viasho's blue handheld lasers, I could be wrong though. This still doesn't justify getting a bad unit though.
 
93shad

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oh ok.
jack the owner of optotronics tests these lasers extensively and would sure as hell not lie about specs. if he has an RPL 70 that means that the average is over 70mw
i read somewhere that when he measures average output its over a period of a few minutes and each recording is every second, that is done 3 times and he takes the average of the 3 averages, and he takes the highest of the 3 peaks... but he does not rate by peak output
 
yobresal

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It is also very possible that the laser started of lasting at 70mW for a much longer period of time and now it is just getting tired of pushing out that much. I have had green lasers that over time and use slowly diminished in power.
 
93shad

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yeah thats possible, so r u planning on keeping the unit? i mean if the beam is realy only .8mRad!!!
 
yobresal

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Yeah I will probably keep it unless a certain scopeguy still wants to steal it from me. I love the color though. And last night after I cleaned all the contacts and put a fresh battery in on the first duty cycle you can clearly see a nice blue beam and a very very bright dot. I just wish it would stay that way for a longer period of time than it does. It Is an awesome laser but it can only be enjoyed in very very very small doses. Anymore and it becomes just another 20-30mW blue laser. Not that that is terrible, it's just hard to accept after having 70mW and popping balloons.
 
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