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Blu-ray 16X 504mW-TR803 host- Flaminpyro

murrat

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+7 on an excellent review , and little powerhouse of a build.
Thanks :beer::cool:

Flaminpyro worked very hard for this build cause I was disturbing often with my questions:san:
One good man ;)
 
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RedCowboy

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I like the 405, it has a small emitter and keeps a tight focus, that and the color is special, powerful yet understated, I would like to converge 6,8,or 12 beams in a flat sided tube made of 40mm strips with the 405 at the far end and a galvo mirror at the user end controlled by an audrino and a rangefinder.

 

murrat

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Do you mean arduino? What this set up is supposed to do?
:whistle:
I like the 405, it has a small emitter and keeps a tight focus, that and the color is special, powerful yet understated, I would like to converge 6,8,or 12 beams in a flat sided tube made of 40mm strips with the 405 at the far end and a galvo mirror at the user end controlled by an audrino and a rangefinder.
 

Isaac Clarke

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i wonder why they never make 3000mw + of 405nm... they use blue diodes....but if i remember correctly 405nm causes more phosphorence...?
 

Pman

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I just figure they don't need more powerful ones in the industry. Honestly not expecting to see anything stronger. It's not like anyone is going to come out with any new diodes for the hobbyist.
I also find it odd how few builds I see using the PLTB-450B in comparison to the A and M140 considering divergence.
 
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RedCowboy

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Do you mean arduino? What this set up is supposed to do?
:whistle:
Yes Arduino, the idea is to converge several beams onto one spot at a variable distance, plus the cone of beams would look cool.
 

murrat

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the divergence of NDG7475 is not that bad for a multi-mode.. the dot size is close to that of the popular M140 diodes.... u just gave me a good idea. may be i'll add a video of multi-mode laser comparison a long with single mode.
Are you still working on the comparison? :)
 

Isaac Clarke

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yes it done!!! beamshot. dot size all done now i just need to find a space that can hold 600 balloons to pop. i'll post a thread in a couple of hours.
 

paul1598419

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Nice review of this laser. I couldn't watch the video because it was on Yahoo and I haven't yet made an account there. Maybe you could post it differently so that isn't necessary. :)
 

murrat

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paul1598419

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Saw it that time. I was wondering why it took so long to get the match to light on the shorter distance, and we can only see the match as it lights on the longer one? I have a 12X 405nm that is set at 700mW and it is much quicker than that. Meh, It was a good video. Thanks.
 

murrat

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Saw it that time. I was wondering why it took so long to get the match to light on the shorter distance, and we can only see the match as it lights on the longer one? I have a 12X 405nm that is set at 700mW and it is much quicker than that. Meh, It was a good video. Thanks.
Because you didn't read it carefully;). It is not focused and it is a pink tipped match. When you focus the laser to infinity to have a parallel beam size of the dot on match gets bigger so you don't have all the power on the match.
When focused it lights instantly.
:lasergun:

I don't understand what you mean by "we can only see the match as it lights on the longer one" ? Longer distance or longer video? :D
In both videos matches can be seen clearly.:whistle:

Try to light a match at far distance with the matches fixed not the laser ;) It is easier when laser beam is fixed but opposite is more difficult (moving the pointer instead of matchs)
 
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paul1598419

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First of all, you are right. I didn't see the caption "lighting a match with beam unfocused" (paraphrasing). It was cut off on my view of the videos. The longer I was talking about was the short time in which the match lit in the longer distance one. It was lit one second after the video was on. I'm sorry I missed the phasing about not being focused, but why would you not focus the beam at that distance? It true that it is easier to light the match when the laser is fixed and the match is brought into the beam, but you managed to do it in the longer distance one; ie. you start the video as the match lights. I thought, at the time, they were legitimate questions, but you made fun of them. Oh well.
 

murrat

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First of all, you are right. I didn't see the caption "lighting a match with beam unfocused" (paraphrasing). It was cut off on my view of the videos. The longer I was talking about was the short time in which the match lit in the longer distance one. It was lit one second after the video was on. I'm sorry I missed the phasing about not being focused, but why would you not focus the beam at that distance? It true that it is easier to light the match when the laser is fixed and the match is brought into the beam, but you managed to do it in the longer distance one; ie. you start the video as the match lights. I thought, at the time, they were legitimate questions, but you made fun of them. Oh well.
In long distance match light video it starts with showing the distance by steel tape measure.Video is 35 seconds. I am not sure why it shows shorter for you. To light a match without focusing shows how good is your divergence. I don't like these focus rings in laser pointers :beer:
 

murrat

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yes it done!!! beamshot. dot size all done now i just need to find a space that can hold 600 balloons to pop. i'll post a thread in a couple of hours.
I couldn't find the comparison. What thread did you post it in :thinking:
 

paul1598419

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Just to see, I took my 405nm laser out and at 4' I tried to light a white tipped match. It lit instantly as soon as the beam hit the match tip. What can you tell about the divergence of a single mode laser diode that is out of focus? I used a G-2 lens on mine. All the 405nm laser diodes are tight single mode diodes. What more do you get out of using a compound lens? Maybe a little better divergence at a farther distance, but it still needs to be focused.
 







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