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Old 07-16-2017, 06:31 PM #1
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Default Question's concerning Jetlasers Yamataka series.

Hello;

I am considering purchasing one of their Yamataka Series Stun Gun & Led Light & Laser Dazzler. But have a couple of questions concerning the options they offer? They offer two different WL"s, a 532nm and a 520nm, at various power levels. Was curious concerning using them in real world applications ( as they were intended, for crowd/people control ).

~~~~~http://jetlasers.org/yamataka-series...0mw-532nm.html~~~~~

1) What would be the real world difference between the two WL's on the human eye?
2) Or would there be difference at all?
3)The durability between the solid state diode and the Dpss module?
4)Was curious about rough housing with it? (i.e. taking it on camping trips and basically using it as a every day flashlight). Which in turn would cause it to be abused, like the abuse the common flashlight gets.
5)Any thoughts on the pro's or con's concerning the various power levels?

Have put in a email to Jetlasers on the subject. Was wondering if anyone had any thoughts/input on the subject? Thanks


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Old 07-16-2017, 07:05 PM #2
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Default Re: Question's concerning Jetlasers Yamataka series.

Bob, first of all I would ask Gray for that.

Of course you might notice difference between these two colors. They are even slightly different in visibility in different light conditions.


Source: Wiki - click on pic for article.

Green curve is for night adapted vision and black for day adapted vision. Here you might see approximately how the difference is for both wavelwngths as perceived by human eye. For same power level of course. You might adjust the amplitude of curves to desired power ratios (there are values of the curves available in various tables on internet).

Regarding durability I would say diode can sustain more than DPSS in terms of temperature, mechanic shocks, humidity, dust and length of use on battery. Of course DPSS beam specs will be better.
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Old 07-16-2017, 07:27 PM #3
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Default Re: Question's concerning Jetlasers Yamataka series.

Quote:
Originally Posted by Radim View Post
Bob, first of all I would ask Gray for that.

Of course you might notice difference between these two colors. They are even slightly different in visibility in different light conditions.


Source: Wiki - click on pic for article.

Green curve is for night adapted vision and black for day adapted vision. Here you might see approximately how the difference is for both wavelwngths as perceived by human eye. For same power level of course. You might adjust the amplitude of curves to desired power ratios (there are values of the curves available in various tables on internet).

Regarding durability I would say diode can sustain more than DPSS in terms of temperature, mechanic shocks, humidity, dust and length of use on battery. Of course DPSS beam specs will be better.
Ok, let me see if I'm understanding correctly; both WL's will be perceived differently via day and night. ( ok, got it, I think). Would there be any less dangerous one to the human eye as opposed to the other? Or would that depend one each individual eye how that eye perceives light?

Beam specs in this application are something I'm thinking is not that important, because we're widening the beam as far as the unit allows. Are you saying the solid state will consume less power than the Dpss module over all?

So two things are in favor of the 520nm, power usage and durability. Plus the fact their a 100 dollars cheaper. Thanks for your input, still working it through.
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Old 07-16-2017, 07:47 PM #4
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Default Re: Question's concerning Jetlasers Yamataka series.

Power is dangerous at all, for brighter perceived light blink reflex might be somehow better IMO, therefore likely more protection with wavelength perceived brighter - but in this case it highly depends on day/night vision as it seems from chart. But I do not think it is very significant.

I see diode might be the option for you for practical reasons, DPSS if you like it.

Diode I call semiconductor lasers - even they are solid, the principle is different as energy is pumped by electric current and not by EM radiation (diode pumped or optical pumped solid state lasers).
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Old 07-16-2017, 07:59 PM #5
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Default Re: Question's concerning Jetlasers Yamataka series.

I'm thinking of longevity. Not so much a concerned about the beam per-say. Just thinking of keeping it in the car/truck as a every day use. Something as a backup just in case.
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Old 07-16-2017, 08:03 PM #6
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Default Re: Question's concerning Jetlasers Yamataka series.

Likely Gray would help here. I would say it depends on further conditions. Still diode seems more durable to me, you also have diode in DPSS and it is more complex with less overall efficiency. Also battery might suffer by high temperatures in car, here diode needs less current than DPSS to provide same output power and here batt might play role (less run time).
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Last edited by Radim; 07-16-2017 at 08:04 PM.
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Old 07-16-2017, 08:44 PM #7
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Default Re: Question's concerning Jetlasers Yamataka series.

Quote:
Originally Posted by Radim View Post
Likely Gray would help here. I would say it depends on further conditions. Still diode seems more durable to me, you also have diode in DPSS and it is more complex with less overall efficiency. Also battery might suffer by high temperatures in car, here diode needs less current than DPSS to provide same output power and here batt might play role (less run time).
Yea. I got a email into Gray with a couple of questions. It's Sunday so I don't expect a answer til this week. But I leaning toward the 520nm version.
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Old 07-16-2017, 08:57 PM #8
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Default Re: Question's concerning Jetlasers Yamataka series.

Seems to me as right decision, Bob. Good luck with your selection. Gray is known to respond fast and almost in any time, so it won't be long I guess. If he has no vaccation at the moment.
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Old 07-16-2017, 11:56 PM #9
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Default Re: Question's concerning Jetlasers Yamataka series.

Quote:
Originally Posted by BobMc View Post
Yea. I got a email into Gray with a couple of questions. It's Sunday so I don't expect a answer til this week. But I leaning toward the 520nm version.
You're leaning in the right direction.
I have a class 4 532nm laser. An observation I made concerning the temporary blinding affect. Shining it on a white wall at night without room lighting on (there is some street lighting) and switching the laser off I'm temporarily without vision for half a second. I can easily imagine a direct exposure at this class or even less would last much longer. Longer still since this would be a quickly repeated process with the dazzler. There was a thread not long ago talking pro and con about the affectiveness of such a device. I was pro then, even more so now.

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Old 07-17-2017, 12:30 AM #10
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Default Re: Question's concerning Jetlasers Yamataka series.

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You're leaning in the right direction.
I have a class 4 532nm laser. An observation I made concerning the temporary blinding affect. Shining it on a white wall at night without room lighting on (there is some street lighting) and switching the laser off I'm temporarily without vision for half a second. I can easily imagine a direct exposure at this class or even less would last much longer. Longer still since this would be a quickly repeated process with the dazzler. There was a thread not long ago talking pro and con about the affectiveness of such a device. I was pro then, even more so now.
I own JetLasers Pistol Dazzler which is a 532nm @ 600mw's, was wondering the difference in the real world effectiveness between the two WL's. I'm diffidently in the pro category. Like the idea of the stun gun/flashlight/dazzler all in one compact unit. Something to keep indiscriminately around.

Jetlasers's Pistol Dazzler Review

It's a review I need to update since photobucket pulled their shenanigans. But you can read the posts to get a idea.

You can see a picture of it in my "museum" post if you wanted to have a look see. Link is in my signature.
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Old 07-17-2017, 12:04 PM #11
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Default Re: Question's concerning Jetlasers Yamataka series.

Quote:
Originally Posted by BobMc View Post
I own JetLasers Pistol Dazzler which is a 532nm @ 600mw's, was wondering the difference in the real world effectiveness between the two WL's. I'm diffidently in the pro category. Like the idea of the stun gun/flashlight/dazzler all in one compact unit. Something to keep indiscriminately around.

Jetlasers's Pistol Dazzler Review

It's a review I need to update since photobucket pulled their shenanigans. But you can read the posts to get a idea.

You can see a picture of it in my "museum" post if you wanted to have a look see. Link is in my signature.
I read that thread when first posted.
About the dazzler you own. If practical I would mask certain parts off that dazzler you already own and spray paint it a color so it is not mistaken for something it's not.
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Old 07-17-2017, 01:17 PM #12
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Default Re: Question's concerning Jetlasers Yamataka series.

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I read that thread when first posted.
About the dazzler you own. If practical I would mask certain parts off that dazzler you already own and spray paint it a color so it is not mistaken for something it's not.
That is an excellent idea Steve. That has been one of my concerns, that someone might think it's a real gun and act accordingly. But seeing how you bought the idea forward. Was thinking maybe buy a toy gun with the bright orange tip and use that? It also is one of the reasons I'm looking at their flashlight version. Thanks for the idea and thoughts.
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Old 07-17-2017, 01:29 PM #13
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Default Re: Question's concerning Jetlasers Yamataka series.

Or if you do not like to do invasive painting to dazzler and reducing its potential value in case of further resale, you might consider orange tape to be put on front to appear like a child gun toy. That's how I would do it.

Definitely laser vs. gun I think I could bet what would be result of the combat. Still, if the gun holder is slow enough with pulling gun out, it might be effective at some longer distance as you might dazzle him before he is able to shoot, but in general I do not think laser would save your butt in most cases I can imagine. But better than nothing of course.

BTW my coming RPL-II should also have some dazzler function, but I bet this is only for very long range dazzling purposes like on sea against pirates approaching, definitely not as self defence somewhere on street, where distance will be significantly shorter and likely the target will be in NOHD. Let's see, I'll off course calculate NOHD for it as I assume it will be the longest from my collection. It is crucial to know it for laserpainting safety purposes.
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Old 07-17-2017, 02:02 PM #14
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Default Re: Question's concerning Jetlasers Yamataka series.

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Originally Posted by Radim View Post
Or if you do not like to do invasive painting to dazzler and reducing its potential value in case of further resale, you might consider orange tape to be put on front to appear like a child gun toy. That's how I would do it.

Definitely laser vs. gun I think I could bet what would be result of the combat. Still, if the gun holder is slow enough with pulling gun out, it might be effective at some longer distance as you might dazzle him before he is able to shoot, but in general I do not think laser would save your butt in most cases I can imagine. But better than nothing of course.

BTW my coming RPL-II should also have some dazzler function, but I bet this is only for very long range dazzling purposes like on sea against pirates approaching, definitely not as self defence somewhere on street, where distance will be significantly shorter and likely the target will be in NOHD. Let's see, I'll off course calculate NOHD for it as I assume it will be the longest from my collection. It is crucial to know it for laserpainting safety purposes.
Interesting, didn't know that about your RPL-ll. Will be looking forward to your findings.

It's no competition between a real gun and a dazzler. Lord willing it will never come to that. But it's never wrong to be prepared.
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Old 07-17-2017, 02:25 PM #15
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Default Re: Question's concerning Jetlasers Yamataka series.

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Originally Posted by BobMc View Post
Interesting, didn't know that about your RPL-ll. Will be looking forward to your findings.

It's no competition between a real gun and a dazzler. Lord willing it will never come to that. But it's never wrong to be prepared.
Definitely. When I got my Evo laser last summer, I was practsing "point and shoot" on tree trunks with that, imaging it might be needed once some animal attacks me, still I had doubts this will ever happen. I was so wrong. It was needed in a few minutes after I put it back into backpack, when dear (huge roebuck) became too interested in me and agressive. No method to deter him worked. I just pulled laser out and activated that trying to make him leave. He was still approaching and making loud noises (it reminds dog's barking a bit)... Just at the final moment before he could made some antler holes in my butt, I used the laser and shined 100 mW of green close to him, worked perfectly and kept me safe. I followed him screaming with the dot like 300 meters.

That was the first moment in my life ever I felt really scared in the forest. Cold sweat covered my forehead afterwards. It was not even night time, just sun was getting down to horizon. Since than I get real relationship with this laser as without it I would be forced to fight with the deer with little chance to come out not injured. No hogs, no foxes or other wild animals I met so far during my life were that agressive and attacked me in so direct way. Not even sharks. Some of them (click for more info about them) were really curious - started to "taste/sniff" me, but just a slight fin kick kept them away. Not even other sea wildlife, when I was diving. And that all I experienced a few kilometers from my home...
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405 nm | 500 mW | Wicked Lasers Lunar
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473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

532 nm | 1.4+ W | Optotronics RPL-II
589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

Laserpainting artworks:
LPF thread: Radim's laser painting
Latest laserpainting: Soul in the Surreal world
Instagram: @radimmatera

Please use hashtag #laserpointerforums for laser related stuff when you post on social media to help us promote LPF. Thank you.

Last edited by Radim; 07-17-2017 at 02:25 PM.
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Old 07-17-2017, 07:42 PM #16
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Default Re: Question's concerning Jetlasers Yamataka series.

Quote:
Originally Posted by Radim View Post
Definitely. When I got my Evo laser last summer, I was practsing "point and shoot" on tree trunks with that, imaging it might be needed once some animal attacks me, still I had doubts this will ever happen. I was so wrong. It was needed in a few minutes after I put it back into backpack, when dear (huge roebuck) became too interested in me and agressive. No method to deter him worked. I just pulled laser out and activated that trying to make him leave. He was still approaching and making loud noises (it reminds dog's barking a bit)... Just at the final moment before he could made some antler holes in my butt, I used the laser and shined 100 mW of green close to him, worked perfectly and kept me safe. I followed him screaming with the dot like 300 meters.

That was the first moment in my life ever I felt really scared in the forest. Cold sweat covered my forehead afterwards. It was not even night time, just sun was getting down to horizon. Since than I get real relationship with this laser as without it I would be forced to fight with the deer with little chance to come out not injured. No hogs, no foxes or other wild animals I met so far during my life were that agressive and attacked me in so direct way. Not even sharks. Some of them (click for more info about them) were really curious - started to "taste/sniff" me, but just a slight fin kick kept them away. Not even other sea wildlife, when I was diving. And that all I experienced a few kilometers from my home...

Wow! That's a very interesting story you've got there Radim. Glad things worked out and you didn't get injured. Could have been- not a good thing. I have scared stray cats before and a flock of crows just by flashing the beam near them. The deer, has stories now, to tell his offspring about the time he ran into an ET.

I'm think their eyes are more sensitive than our eyes are. Read that somewhere once.
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