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Old 05-17-2016, 01:58 AM #1
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Thumbs up Great deals on 532nm

Just visited O-like and they have the lowest price I've ever seen on the crown upgrade 500mW 532nm. If I had the $ I would buy another one. $239.99
Powerful Crown upgrade 500mW green laser torch/waterproof [OL-532-500] - $239.99 : Zen Cart!, The Art of E-commerce
I've owned one for years and I know a few others have them too. Nice looking unit and as far as I know everyone's was over spec. They rate it at >450mW. Can't see myself ever selling mine. Definately one of my all time favorites.


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Old 05-17-2016, 02:45 AM #2
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Default Re: Great deals on 532nm

Great deal/low price for a 500mW 532nm---thanks for the tip!
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Old 05-17-2016, 03:08 AM #3
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Default Re: Great deals on 532nm

Nice find! I bought a 500mW 532 for $120, from XPL. you can find my review in the reviews section.
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Old 05-17-2016, 03:50 AM #4
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Default Re: Great deals on 532nm

It is indeed a great price. Actually its been priced at $240 for a while now and you can't beat $180 for the 400mW. I picked up the 400mW to save a few bucks and still metered at 440mW's. I figured saving 60 bones was worth it because the visual difference between the two isn't very noticeable. I love my Crown Up. Its my camping emergency laser we take on our multi night back packing trips on Mt. Hood. Its a massive mountain and if we ever got lost a great way to signal our location. When we register our party at the registration box I write in "Green laser on hand" so in the event they know what to look for. It almost came in handy last summer when we lost our way at 7000'. We eventually found the trail but I felt some comfort having the Crown Upgrade in my back pack.
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Old 05-20-2016, 02:02 AM #5
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Default Re: Great deals on 532nm

Nice!
But what about divergence?
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Old 05-20-2016, 08:29 AM #6
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Default Re: Great deals on 532nm

Quote:
Originally Posted by Cel View Post
Nice!
But what about divergence?
Here is my review of the Crown. I measured the divergence.
nwfreefly- O-like Crown upgrade 400mW 532nm Review

Or to save you some time here's a quote related to the divergence.
"On to the beam and of coarse later on below the beam shots. 1.5mm(at aperture) The dot measured 6mm at 2 meters and 11mm at 7.5 meters. Im not sure if this is good or bad for a 532nm. "
I plugged in my numbers into a divergence equation and got the following;

Your laser has a divergence of
0.9090906586527662
mRad.
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Old 05-20-2016, 10:47 AM #7
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Default Re: Great deals on 532nm

Thanks!
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Old 05-20-2016, 10:12 PM #8
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Default Re: Great deals on 532nm

Quote:
Originally Posted by olympus mons View Post
It is indeed a great price. Actually its been priced at $240 for a while now and you can't beat $180 for the 400mW. I picked up the 400mW to save a few bucks and still metered at 440mW's. I figured saving 60 bones was worth it because the visual difference between the two isn't very noticeable. I love my Crown Up. Its my camping emergency laser we take on our multi night back packing trips on Mt. Hood. Its a massive mountain and if we ever got lost a great way to signal our location. When we register our party at the registration box I write in "Green laser on hand" so in the event they know what to look for. It almost came in handy last summer when we lost our way at 7000'. We eventually found the trail but I felt some comfort having the Crown Upgrade in my back pack.
Back in the 80s I lived in Vancouver, WA for three years and Gresham for another year. I always enjoyed going to the summit of Mt. Hood. There are tons of things to do there. Now, I'm back in Washington, just a little farther north now.

Great find on the laser. I have a lot of 532nm laser though. I might go in for a 1 watt or higher later on.
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Old 05-21-2016, 05:14 AM #9
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Default Re: Great deals on 532nm

Hey Pman, did you LPM it?
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Old 05-23-2016, 01:27 AM #10
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Default Re: Great deals on 532nm

(The late) Isaac Clarke told me that you could run a laser like this (500mw 532) effectively with an unlimited duty cycle because "DPSS green does not generate much heat." Is this true, or no?
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Old 05-23-2016, 04:21 AM #11
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Default Re: Great deals on 532nm

Quote:
Originally Posted by abciswell View Post
(The late) Isaac Clarke told me that you could run a laser like this (500mw 532) effectively with an unlimited duty cycle because "DPSS green does not generate much heat." Is this true, or no?
A 500mw 532 probable has a 2.5W IR pump diode and then there's additional inefficiency related to the driver. I'd say they still need a reasonable duty cycle.
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Old 05-23-2016, 04:34 AM #12
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Default Re: Great deals on 532nm

Quote:
Originally Posted by Razako View Post
A 500mw 532 probable has a 2.5W IR pump diode and then there's additional inefficiency related to the driver. I'd say they still need a reasonable duty cycle.
Didn't think so. Thanks!

The IR output of the laser isn't too bad though, right? Or does this particular one from O-like have an IR filter
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Old 05-23-2016, 07:38 AM #13
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Default Re: Great deals on 532nm

Quote:
Originally Posted by abciswell View Post
(The late) Isaac Clarke told me that you could run a laser like this (500mw 532) effectively with an unlimited duty cycle because "DPSS green does not generate much heat." Is this true, or no?
What the what!? Why on earth would he think a 2W 808nm pump diode doesn't produce heat?
The duty cycle on the Crown is 100 sec on 60 off.
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