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Old 03-06-2017, 05:07 PM #17
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Default Re: Hello!

Welcome to the forum. Be safe and have fun.
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Old 03-06-2017, 06:01 PM #18
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Default Re: Hello!

Quote:
Originally Posted by CurtisOliver View Post
This is not a good idea. We've had numerous threads with people wanting to zap flying insects with lasers and the response is the same. No.
It is an impressive tracking system, but it is highly dangerous to have class 4 firing out at random insects. Take my advice and stick with other forms of mosquito killers.
The most you will get out of it is you or others having permanent eye injuries.
Quote:
Originally Posted by CurtisOliver View Post
You are not only wanting to do a dangerous laser project, but you are also hoping to use the most dangerous visible diode available. I can see a disaster waiting to happen. Also you need laser goggles rated at OD 5 for 190-540nm. To be blunt, I do not advise you to do it. There are so many cheaper, safer and time saving alternatives to this idea.
Welcome but...

Agree 100% CurtisOliver. Good advice

Hurry: It is a not a good idea for several/many reasons, not the least of which is you don't have any money/budget, knowledge or experience with lasers, what they do, and how they work in the real world vs imagination + is of no practical value or application in the real world that would ever be allowed as a product by the FDA who regulate all laser devices even if you could get such a dangerous device to work with high speed autofocus in addition to location.

Your not the only one as you might guess many people and labratories with plenty of funding have been chasing the same idea since the 1980s --all of it has amounted to nothing beyond a laboratory novelty.

Have a look at another among many threads about the same daydream here: Eye safe laser to kill mosquitoes ?
Beyond that, you can use the LPF Search function at the bottom of the page see what others have said and done

Sounds likes the daydream of child or someone who spent too much time on Xbox and Playstation with too much time on their hands, , an accident looking for a place to happen, and waste of time and money--really.

Last edited by Encap; 03-06-2017 at 08:26 PM.
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Old 03-06-2017, 06:06 PM #19
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Default Re: Hello!

Good follow up advice Encap. +rep when I can.
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Old 03-06-2017, 07:19 PM #20
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Default Re: Hello!

Quote:
Originally Posted by Encap View Post
Welcome but...

Agree 100% CurtisOliver. Good advice

Hurry: It is a not a good idea for several/many reasons, not the least of which is you don't have any money/budget, knowledge or experience with lasers, what they do, and how they work in the real world vs imagination + is of no practical value or application in the real world that would ever be allowed as a product by the FDA who regulate all laser devices even if you could get such a dangerous device to work with high speed autofocus in addition to location.

Your not the only one as you might guess manyeople and labratories with plenty of funding have been chasing the same idea since the 1980s --all of it has amounted to nothing beyond a laboratory novelty.

Have a look at another among many threads about the same daydream here: Eye safe laser to kill mosquitoes ?
Beyond that, you can use the LPF Search function at the bottom of the page see what others have said and done

Sounds likes the daydream of child or someone who spent too much time on Xbox and Playstation with too much time on their hands, , an accident looking for a place to happen, and waste of time and money--really.
Thank you for all your words.
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Old 03-06-2017, 07:31 PM #21
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Default Re: Hello!

You might want to reconsider that system? Even with a beam expander, that system will have to be awfully accurate to get any decent range.
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Old 03-06-2017, 07:56 PM #22
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Default Re: Hello!

Quote:
Originally Posted by Crazlaser View Post
You might want to reconsider that system? Even with a beam expander, that system will have to be awfully accurate to get any decent range.
Hi, yes I have asked here
Info optics for a smaller beam at 5m

But no useful answer for now about my question
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Old 03-06-2017, 09:04 PM #23
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Default Re: Hello!

Quote:
Originally Posted by Hurry View Post
Hi, yes I have asked here
Info optics for a smaller beam at 5m

But no useful answer for now about my question
There is no "useful", in the sense you mean, answer possible other than you would need to develop an advanced very high speed autofocus system that would focus the laser output energy on the target mosquitoe at whatever distance it is from the laser.

Divergence on high power multimode diodes is terrible especailly on a nubm44 diode - there are things you can do to improve them but you have to make a trade somewhere, either for output power or beam diameter (or both!).

Example: When using a G2 or 6mm diameter collimation lens the divergence from a NUBM44 is about 12 mRad --meaning the beam gets 12mm larger per 1 meter of travel and it is not round, it is an approx 3 X 1 rectangle to begin with.

Last edited by Encap; 03-06-2017 at 10:39 PM.
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Old 03-06-2017, 09:25 PM #24
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welcome to the planet
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Old 03-07-2017, 05:58 AM #25
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Default Re: Hello!

Quote:
Originally Posted by Encap View Post
There is no "useful", in the sense you mean, answer possible other than you would need to develop an advanced very high speed autofocus system that would focus the laser output energy on the target mosquitoe at whatever distance it is from the laser.

Divergence on high power multimode diodes is terrible especailly on a nubm44 diode - there are things you can do to improve them but you have to make a trade somewhere, either for output power or beam diameter (or both!).

Example: When using a G2 or 6mm diameter collimation lens the divergence from a NUBM44 is about 12 mRad --meaning the beam gets 12mm larger per 1 meter of travel and it is not round, it is an approx 3 X 1 rectangle to begin with.
OK, so if I reduce the distance at maximum 2 meters I can obtain a good compromise between power and beam diameter, with three element lens + 3X cylindrical lens, right?

Last edited by Hurry; 03-07-2017 at 06:00 AM.
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Old 03-07-2017, 08:38 PM #26
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Default Re: Hello!

Quote:
Originally Posted by Hurry View Post
OK, so if I reduce the distance at maximum 2 meters I can obtain a good compromise between power and beam diameter, with three element lens + 3X cylindrical lens, right?
The problem with the NUBM44 and other wide-rectangle-beam shaped laser diodes is that one axis (horizontal or vertical) expands at a different rate than the other. So while you can make your lens focus one axis so that it doesn't diverge (much), the other axis will continue to expand. Unless you want to invest and mount and focus a cylindrical lens (pair), you'll have to live with a beam that can remain roughly the same width in only one axis.

You already have everyone's best advice about what you seem bent on doing.

Would suggest you build a handheld laser first and do the reseach and testing yourself to see what that diode is and does to test the applications possibilities.

Google the subject in general to learn more about it.

Use the LPF seach function--a lot of diode and optics specific information in the data base.

See thread: OPT Lasers Cylindric lenses - NUBM44 beam correction tests

Beyond that you're on your own. You can't expect very much spoon-feeding/babysitting at LPF beyond pointing in a direction.

Last edited by Encap; 03-08-2017 at 02:47 AM.
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Old 03-07-2017, 08:55 PM #27
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Default Re: Hello!

Quote:
Originally Posted by Encap View Post
You already have everyone's best advice about what you seem bent on doing.

Would suggest you build a handheld laser first to see what that diode is and does to test the applications possibility.

Google the subject to learn more.

Use the LPF seach function--a lot of specific information in the data base.
Yes, this is what i'll do.
Yesterday i received the diode, but i don't use before that i receive the goggle, because the actual goggle is not enough protection for that diode
Attached Thumbnails
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Last edited by Hurry; 03-07-2017 at 08:59 PM.
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Old 03-07-2017, 09:47 PM #28
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Default Re: Hello!

You picked a mighty small heat sink for this diode. That heat sink is what I use on 500 mW or less. Also, you will get better heat conductivity if you use copper instead of aluminum. At any rate, you will need a much larger heat sink if you plan on using this diode for more than 30 seconds at a time.
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Old 03-08-2017, 05:55 AM #29
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Default Re: Hello!

Quote:
Originally Posted by paul1598419 View Post
You picked a mighty small heat sink for this diode. That heat sink is what I use on 500 mW or less. Also, you will get better heat conductivity if you use copper instead of aluminum. At any rate, you will need a much larger heat sink if you plan on using this diode for more than 30 seconds at a time.
Ok, I'm looking for e better heatsink.
What is the maximum operation temperature?
I have added a thermometer, so I can stop using when the temperature is reached and the fan still working to lowering the temperature
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Old 03-08-2017, 05:42 PM #30
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Default Re: Hello!

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Originally Posted by Hurry View Post
Ok, I'm looking for e better heatsink.
What is the maximum operation temperature?
I have added a thermometer, so I can stop using when the temperature is reached and the fan still working to lowering the temperature
It depends on whether you plan on using the NUBM44 or the M140. The former needs much more heat sinking than the latter. Either way, I'd use something larger and if you plan on using the NUMB44, substantially larger. The duty cycle depends on how well your set up carries heat away from the laser diode. I don't have a direct temperature for these, just a guide line. It may be that someone else can quantify the temperature for you. Good luck.
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Old 03-09-2017, 10:55 AM #31
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Default Re: Hello!

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Originally Posted by paul1598419 View Post
It depends on whether you plan on using the NUBM44 or the M140. The former needs much more heat sinking than the latter. Either way, I'd use something larger and if you plan on using the NUMB44, substantially larger. The duty cycle depends on how well your set up carries heat away from the laser diode. I don't have a direct temperature for these, just a guide line. It may be that someone else can quantify the temperature for you. Good luck.
Hello

for the M140 diode i has a good hosting (like as attachment), after several minutes, the temperature is ok.

For i want to buy this for NUBM44 Heat Sink for 12 mm Modules or you know something else?
Attached Thumbnails
Hello!-s-l225.jpg  

Last edited by Hurry; 03-09-2017 at 10:57 AM.
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Old 03-09-2017, 07:51 PM #32
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Default Re: Hello!

Quote:
Originally Posted by Hurry View Post
Hello

for the M140 diode i has a good hosting (like as attachment), after several minutes, the temperature is ok.

For i want to buy this for NUBM44 Heat Sink for 12 mm Modules or you know something else?
This is the setup for a lab laser. It is better than what you showed before, but the NUBM44 driven to output close to 7 watts puts out a lot of heat. If I were going to use this for that diode, I'd add a TEC to keep the temperature down. You might get by without it, but it is what I would do.
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445nm 2 watt SMP Copper Host
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
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632.8nm PMS He-Ne # 201P/ LPS-115 2mW
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635nm 1 watt Cyprus II
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808nm 1+W infrared laser
infrared video camera for collimating IR lasers
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Scientech Vector S310 with AC2500 10 Watt LPM
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