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05-11-2015, 12:27 AM #17
 Class 3B Laser Join Date: Jan 2014 Location: Baghdad, Iraq Posts: 4,245 Rep Power: 2087
Alaskan
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Re: green laser help

I believe that is one of Rick Trents lasers?

1W to 1 6W 520nm Green Laser Kit MX 900 Host Copper Heat Sink Focusable Lens | eBay

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http://www.lexellaser.com/techinfo_wavelengths.htm

Laser Safety:
http://www.laserpointersafety.com/index.html

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

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05-11-2015, 12:47 AM #18
 Junior Member Join Date: May 2015 Location: ohio Posts: 27 Rep Power: 0
rotor7
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Re: green laser help

Quote:
 Originally Posted by Alaskan I believe that is one of Rick Trents lasers? 1W to 1 6W 520nm Green Laser Kit MX 900 Host Copper Heat Sink Focusable Lens | eBay
bought from a guy named Doug johnson but looks the same

05-11-2015, 01:43 AM #19
 Class 3B Laser Join Date: Jan 2014 Location: Baghdad, Iraq Posts: 4,245 Rep Power: 2087
Alaskan
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Join Date: Jan 2014
Location: Baghdad, Iraq
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Re: green laser help

Found him, looks like he uses the 700mw 520nm driven to a watt output:

https://www.youtube.com/watch?v=azgPr5G0bp4
__________________

http://www.lexellaser.com/techinfo_wavelengths.htm

Laser Safety:
http://www.laserpointersafety.com/index.html

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

05-11-2015, 09:02 AM #20
 Class 3R Laser Join Date: Nov 2014 Location: Netherlands Posts: 1,092 Rep Power: 220
gozert
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Re: green laser help

Quote:
 Originally Posted by Alaskan Found him, looks like he uses the 700mw 520nm driven to a watt output: https://www.youtube.com/watch?v=azgPr5G0bp4
I'm really wondering how that guy hasn't blinded himself yet. He's burning stuff with a 1W green from barely 2 feet away.
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05-11-2015, 09:17 AM #21
 Class 3B Laser Join Date: May 2013 Location: Snohomish County Washington, US Posts: 3,800 Rep Power: 1086
Pi R Squared
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Re: green laser help

He did say it had a 3 element glass lens, so the output was probably more like 700mW, but that's still way to much to look at up close like that. Maybe he is wearing his safety contact lenses.

Alan
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Keychain 650nm <5mW
Quartet 4-in-1 630-680nm <1mW

AtlasNova 635nm <5mW
MillionAccessories 532nm <5mW broken
M462 462nm one of a kind (in progress)
PLTB450B 450nm 1913mW G2 lens
PL520 520nm 82mW acrylic lens
S06J 12X 405nm 590mW G2 lens
C6 M140 445nm 1.5W 3 element lens
9mm 445nm with G2 lens in a stainless steel host
Radiant Electronics X4 3.7W Laser Power Meter

Everyone please post here: Countries of LPF. Where are you? <link>
___________________________________________
The light that shines twice as bright burns half as long.

05-11-2015, 02:22 PM #22
 Class 1 Laser Join Date: Mar 2013 Location: NJ, USA Posts: 63 Rep Power: 17
CelticLaser1
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Quote:
 Originally Posted by Alaskan I believe that is one of Rick Trents lasers? 1W to 1 6W 520nm Green Laser Kit MX 900 Host Copper Heat Sink Focusable Lens | eBay
I believe he said it was a doug johnson build. Rick trent built me a 462nm that is amazingly bright.

05-11-2015, 02:26 PM #23
 Class 1 Laser Join Date: Mar 2013 Location: NJ, USA Posts: 63 Rep Power: 17
CelticLaser1
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Quote:
 Originally Posted by gozert It were probably the goggles. As long as you don't point throug a window or on a reflective surface, you don't need to use the goggles. Maybe a red laser is better for what you're doing with it. As grass/leafs are mainly green, you won't really see the dot well in daylight. You should however be able to see the beam of such a high powered laser in daylight, so give it another try without goggles maybe.
Red laser will not work on the birds. I use 532nm and it works very well

05-11-2015, 06:08 PM #24
 Junior Member Join Date: May 2015 Location: ohio Posts: 27 Rep Power: 0
rotor7
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Re: green laser help

Quote:
 Originally Posted by gozert I'm really wondering how that guy hasn't blinded himself yet. He's burning stuff with a 1W green from barely 2 feet away.
I totally agree this thing is bright! Thats why I always wore the glasses.

05-11-2015, 09:47 PM #25
 Class 3R Laser Join Date: Dec 2014 Location: N.J. USA ⚡️⚡️ Posts: 2,046 Rep Power: 1428
Lifetime17
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Re: green laser help

Hi forget the laser goose thing go on line and get yourself a bird bomb. It's a pistol that is activated by a special short blank cartriges. Put the bomb in the barrel insert the blank pull hammer back point up in the air only . The cartriges ignites the back of the bomb and it a sends it up to about 200 ft and blows up. They work great without endangering the wildlife.

05-12-2015, 12:03 AM #26
 Class 1 Laser Join Date: Mar 2013 Location: NJ, USA Posts: 63 Rep Power: 17
CelticLaser1
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Lifetime17 is correct. You can make them fairly cheap. I dont know the situation you have as far as neighbors go but they are very loud. You can also use bird spikes and solutions of that nature that will deter the birds from specific areas. The laser wont work if theyre on the roofline because you need to put the dot about 10 feet away and slowly move closer. If you cant get the dot on the roof because youre standing on the ground then it wont work. Also DO NOT direct it toward the eye as they will go blind.

05-12-2015, 12:39 PM #27
 Junior Member Join Date: May 2015 Location: ohio Posts: 27 Rep Power: 0
rotor7
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Re: green laser help

Today I tried it again with them all on the grass walking around. Some walked away from the light but seemed to ignore it fairly quickly. The only thing it really did was make them stop honking.

No, I did not blind any of them.

I can't use anything with loud noises my neighbors would kill me. My one neighbor tried a spray that was supposed to repel them off his lawn. That didn't work. Which is funny because he is a freak about his yard. My drone worked for a while but they started to just squat down when I flew it over their heads. Also the drone is a pain to get all set up in a moments notice just to scare them.

I guess I'm back to the only thing that really works, my two golden retrievers.

05-12-2015, 12:50 PM #28
 Class 3B Laser Join Date: May 2013 Location: Snohomish County Washington, US Posts: 3,800 Rep Power: 1086
Pi R Squared
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Re: green laser help

Try a scarecrow, there are also motion activated sprinklers made for this purpose.

Alan
__________________
Keychain 650nm <5mW
Quartet 4-in-1 630-680nm <1mW

AtlasNova 635nm <5mW
MillionAccessories 532nm <5mW broken
M462 462nm one of a kind (in progress)
PLTB450B 450nm 1913mW G2 lens
PL520 520nm 82mW acrylic lens
S06J 12X 405nm 590mW G2 lens
C6 M140 445nm 1.5W 3 element lens
9mm 445nm with G2 lens in a stainless steel host
Radiant Electronics X4 3.7W Laser Power Meter

Everyone please post here: Countries of LPF. Where are you? <link>
___________________________________________
The light that shines twice as bright burns half as long.

05-14-2015, 10:24 PM #29
 Junior Member Join Date: May 2015 Location: ohio Posts: 27 Rep Power: 0
rotor7
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Posts: 27
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Re: green laser help

I have been playing around with the focus and have noticed that the geese are more afraid of the dot when its brighter and smaller.

When I first tried this, the beam wasn't focused and the dot was rather large at distance. Now I'm working with a smaller brighter dot and they do run from it.

I might just keep this thing now ha!

It still scares me how dangerous this can be

05-14-2015, 11:59 PM #30
 Class 1 Laser Join Date: Mar 2013 Location: NJ, USA Posts: 63 Rep Power: 17
CelticLaser1
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Quote:
 Originally Posted by rotor7 I have been playing around with the focus and have noticed that the geese are more afraid of the dot when its brighter and smaller. When I first tried this, the beam wasn't focused and the dot was rather large at distance. Now I'm working with a smaller brighter dot and they do run from it. I might just keep this thing now ha! It still scares me how dangerous this can be
Glad you figured it out dont use it too much or they will get use to it

05-18-2015, 06:50 PM #31
 Class 2 Laser Join Date: Nov 2010 Location: USA ,Morristownt TN. Posts: 471 Rep Power: 86
ricktrent4
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Re: green laser help

Quote:
 Originally Posted by rotor7 bought from a guy named Doug johnson but looks the same
He get a lot of parts from me but did not get a 1w diode.

05-19-2015, 02:49 PM #32
 Class 3R Laser Join Date: Nov 2014 Location: Netherlands Posts: 1,092 Rep Power: 220
gozert
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Re: green laser help

Quote:
 Originally Posted by ricktrent4 He get a lot of parts from me but did not get a 1w diode.
Just wondering, do you have bionic eyes or something? How are you able to look at a 1W 520nm without safety goggles from barely 2 feet away?
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