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Old 08-12-2017, 09:49 PM #33
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

I just read that the DTR's 520nm AR Coated Two Element Glass Lens is said to work very well at removing the "green beam box" and really cleans up the beam with the green laser diodes and doesn't rob as much power as the three element glass lenses, https://sites.google.com/site/dtrlpf/home/glass-lenses And it only costs $8.60 to boot !


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My very short laser collection (for now)

Thor "Saber" Americanised Thor M II - DTR M462 2.2 Watt 462mn Diode W/Super X-Drive @ 1.8 Amps - DTR G-2 lens - OPT Laser 2X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

"Thor's Hammer" Americanised TLY-L201 Host Build W/Old School NASA Type Safety Switch - DTR NUBM44-81 8+ Watts at 4.5 Amps 450nm Diode In A 25mm Copper Module W/Driver - DTR G-2 lens - OPT Laser 6X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

303 Prome Star Series Green Laser 532nm 80mW DPSS Class IIIb

Last edited by Accutronitis; 08-12-2017 at 09:53 PM.
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Old 08-12-2017, 10:01 PM #34
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

Who has made the claim that these 2 element lenses have no part of that rectangular artifact when used with these 503nm diodes? I don't want to order them unless I can be sure of this as a remedy.
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Old 08-12-2017, 10:05 PM #35
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

The OP did in his thread 1.3-1.4Watt 520nm NDG7475 GREEN BULLET Build

The green box was really bugging him and he said that lens worked for him......
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Thor "Saber" Americanised Thor M II - DTR M462 2.2 Watt 462mn Diode W/Super X-Drive @ 1.8 Amps - DTR G-2 lens - OPT Laser 2X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

"Thor's Hammer" Americanised TLY-L201 Host Build W/Old School NASA Type Safety Switch - DTR NUBM44-81 8+ Watts at 4.5 Amps 450nm Diode In A 25mm Copper Module W/Driver - DTR G-2 lens - OPT Laser 6X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

303 Prome Star Series Green Laser 532nm 80mW DPSS Class IIIb

Last edited by Accutronitis; 08-12-2017 at 10:06 PM.
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Old 08-12-2017, 10:23 PM #36
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

That was with the multi mode 520nm NDG7475 diode. I would like to see something done with these 503nm single mode LDs. The artifact is there in the multi mode 520nm, but that doesn't guarantee that it will work with this diode. I have used multi element glass lenses trying to remove that artifact without success.... even with 500nm to 550nm AR coated lenses.
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635nm Lifetime17 Mini-camo build 687mW
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808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
Scientech Vector S310 with AC2500 10 Watt LPM
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Last edited by paul1598419; 08-12-2017 at 11:20 PM.
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Old 08-12-2017, 10:38 PM #37
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

I thought the multi mode diodes artifact was worse then the single mode ? But besides that i didn't guarantee that it would work with this diode, I just figured for only $8.60 it was worth a try if it could work as well as it seems to with the multi mode diodes ?
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My very short laser collection (for now)

Thor "Saber" Americanised Thor M II - DTR M462 2.2 Watt 462mn Diode W/Super X-Drive @ 1.8 Amps - DTR G-2 lens - OPT Laser 2X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

"Thor's Hammer" Americanised TLY-L201 Host Build W/Old School NASA Type Safety Switch - DTR NUBM44-81 8+ Watts at 4.5 Amps 450nm Diode In A 25mm Copper Module W/Driver - DTR G-2 lens - OPT Laser 6X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

303 Prome Star Series Green Laser 532nm 80mW DPSS Class IIIb
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Old 08-12-2017, 10:50 PM #38
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

Hey Paul the 2 element lens does help a lot when compared to the g2 lens. Its not perfect but much better than the g2. Similar to the 3 element but less side splash with the 2 element.
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Old 08-12-2017, 11:24 PM #39
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

I get that. Nothing is worse for this artifact than the single element asperical glass lens. My point was that it is still there with all glass lenses. The only remedy I've found is an uncoated acrylic lens. I have yet to see any bit of it with these lenses and until I find another remedy, they are all that I am using.
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Thor H Dual Power 445nm, 438 mW & 1648 mW
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445nm 2.2 watts Nichia MS Envy

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477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
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
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632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
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Old 08-13-2017, 12:13 AM #40
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

Paul I'll have to find one of those you're referring to and try it out.

I found another lens in my kit, I assume it's a three element see below, correct?
It did improve the artefact quite a bit compared to the G2 but it's still evident.





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Old 08-13-2017, 12:24 AM #41
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

Yeah, Andrew. That's a multi element glass lens and it has the artifact. The uncoated acrylic lenses are very easy to find. They are the free lenses sent along with modules when you buy them in multiple quantities. They come with a black plastic lens housing that is very short. So much so, that the infinity focus is just a couple of turns away from being flush with the top of the module.
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405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 1.75 watts SkyRay Gifted
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

445nm 2 watt SMP Copper Host
477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
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
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
635nm 1 watt Cyprus II
635nm 1 watt SMP Copper host
635nm 5mW pointer
635nm 100mW pointer
635nm Lifetime17 Mini-camo build 687mW
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
Scientech Vector S310 with AC2500 10 Watt LPM
LaserBee II 3.2 Watt LPM
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Old 08-13-2017, 02:45 AM #42
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

Great thanks Paul, I'll see if I have one somewhere.

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For God so loved the world that He gave His only begotten Son, that whoever believes in Him
should not perish but have everlasting life.
For God did not send His Son into the world to condemn the world,

but that the world through Him might be saved.
“He who believes in Him is not condemned;
but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God.
And this is the condemnation, that the light has come into the world, and men loved darkness rather than light, because their deeds were evil.
For everyone practicing evil hates the light and does not come to the light, lest his deeds should be exposed.
But he who does the truth comes to the light, that his deeds may be clearly seen, that they have been done in God.”
(John 3:16-21)
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Old 08-13-2017, 03:18 AM #43
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

BTW, Andrew. I noticed that the glass lens in your photo in post #40 is backwards. The slotted end goes toward the focus ring. It's that way on all lenses. So, when you find an acrylic lens, make sure the slotted end is away from the diode.
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Old 08-13-2017, 03:31 AM #44
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

Quote:
Originally Posted by paul1598419 View Post
BTW, Andrew. I noticed that the glass lens in your photo in post #40 is backwards. The slotted end goes toward the focus ring. It's that way on all lenses. So, when you find an acrylic lens, make sure the slotted end is away from the diode.
Ahh, thank you so much Paul.



Edit: I just checked and the deeper slotted end is in the focus ring.
It's the one with the slot all the way from edge to edge that's in the focus ring.

Edit: yep I can confirm it's correct way because I turned it the other way and it's just a huge circle that won't focus at all.

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Old 08-13-2017, 03:39 AM #45
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

Oh, then that one has that attachment to take it apart. I don't see those that often.
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Old 08-13-2017, 03:43 AM #46
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

Quote:
Originally Posted by paul1598419 View Post
Oh, then that one has that attachment to take it apart. I don't see those that often.
Rick Trent sent it as an extra with one of his builds.
He always send me two lenses, one for burning and the other for better beam spot.

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but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God.
And this is the condemnation, that the light has come into the world, and men loved darkness rather than light, because their deeds were evil.
For everyone practicing evil hates the light and does not come to the light, lest his deeds should be exposed.
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(John 3:16-21)
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Old 08-17-2017, 05:25 AM #47
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

The 2 Element does help a lot with Green beams. But it's still not perfect. There is some spatial light emmited at a wide angle from the beam. Not much power though.

I have tested it with 520nm and 505nm. Same results. Much better than G2 but still some reflections.
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Old 08-17-2017, 06:47 AM #48
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Default Re: My Tiny Green Giant (505nm) Copper Build with Beam Shot

That has been my experience as well. Only the acrylic lenses that have no AR coating give a clean dot. I don't know why this is the case, just that it is.
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477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
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
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
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635nm 1 watt Cyprus II
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635nm 5mW pointer
635nm 100mW pointer
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650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
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