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Old 01-17-2014, 04:44 PM #17
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Default Re: PLTB450 on a SCAR5 5.56 rifle? Thoughts.

I second the 520 Idea. the new multimode osram versions can output at least 200mW and have better divergence according to DTR and styropyro than m140 445 diodes. another reason I'd go with 520nm over 445nm or 450nm is that to me at least, blue laser dots, even at high powers, are a lot harder to see in daylight conditions than green laser dots. sure a 1W 445 beam may look comparably bright to a 250mW green, but take 'em out in the day and the difference is obvious. I think right around 200mW of 520 would be perfect for daytime range shooting. no one will need safety glasses if you follow the same rules with the laser as you do with the gun. a 200mW dot, at range, during daylight, will not damage anyone's vision as long as your targets are not mirrors. I believe 520 is superior than 532 for this application because it stands to reason that a diode can more easily withstand recoil than a DPSS setup. don't quote me on that, but it makes sense to me.

I have one of these https://www.lasermax.com/ProductDeta...9/Default.aspx and love everything about it except the brightness (and cost). its great in low light or night, but in daylight, its hard to see beyond a few yards, or you have to take time to find it after each shot. it does have incredible divergence, it might have the best divergence of my lasers. it's also nice that it's adjustable for windage/elevation, something that would be a tall order to incorporate in a custom design

on a side note, I have been wondering if one could use a defocused laser as a shotgun sight, and adjust the divergence angle to roughly match the shot spread pattern at any given distance such that the size of your laser's dot will roughly indicate the size of your shot grouping at any given distance. it's probably not possible


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Last edited by Shakenawake; 01-17-2014 at 04:54 PM.
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Old 01-17-2014, 07:06 PM #18
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Default Re: PLTB450 on a SCAR5 5.56 rifle? Thoughts.

Do shotgun pellets curve outwards, or to the individual pellets curve randomly, or do they basically just go straight (gravity not included)? If they just go straight, or they randomly spread, I don't see why not a laser could be used.
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Old 01-17-2014, 07:21 PM #19
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Default Re: PLTB450 on a SCAR5 5.56 rifle? Thoughts.

From my shooting experience, and of course it depends on the shotgun/barrel, but 00buck tends to hold a 12" group 10-15 yards. An unfocused laser beam say the size of a pie plate at 10-15yards could be useful. I wouldnt trust it past 25yards but I like the idea.
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Old 01-17-2014, 07:24 PM #20
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Default Re: PLTB450 on a SCAR5 5.56 rifle? Thoughts.

Quote:
Originally Posted by BShanahan14rulz View Post
Do shotgun pellets curve outwards, or to the individual pellets curve randomly, or do they basically just go straight (gravity not included)? If they just go straight, or they randomly spread, I don't see why not a laser could be used.
I think it would be useful for quick acquisition At short range.
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Old 01-17-2014, 07:30 PM #21
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Default Re: PLTB450 on a SCAR5 5.56 rifle? Thoughts.

I thought it was a cool idea. imagine it now with an IR laser and some night vision goggles, at night.

Oh yeah and earlier I meant you shouldn't need laser glasses for that use, not no glasses at all. you should always wear eye protection when shooting.
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501B BDR-209 16X 405nm 630mW @.52Ag lens
Host by Ehgemus NUBM44 450nm 6.8W @4.5A g lens
Host by Ehgemus M462 462nm 1.5W @1.2A g lens
Dominator NUBM07E 465nm 4.3W @3.5A g lens
L2P Nichi@ NDG4216 515nm 110mW @ .35A
501B by Blord osr@m PL520 520nm 95mW @.3A g lens
PL-E pro from Jetlasers nichi@ NDG7475 520nm 980mW, 730mW w/ 10X BE

Lasermax Genesis sight 532nm 5mW
RPL from Optotronics 532nm 450mW

Spartan from Dragonlasers 589nm 50mW
501B HL63133DG 638nm 210mW @.3A g lens
501B Ocl@ro HL63193MG 638nm 960mW @1.3A g lens

501B by Blord LPC 826 660nm 325mW @?A g lens
PL660 from Laserbtb 660nm 1020mW

LPM
DL matrix and fan transmission gratings

laser powers in sig are about 20 seconds into duty cycle, not peak powers

http://laserpointerforums.com/f39/co...her-94720.html

(I guess I am a vet now)

Last edited by Shakenawake; 01-17-2014 at 07:34 PM.
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Old 01-18-2014, 01:36 AM #22
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Default Re: PLTB450 on a SCAR5 5.56 rifle? Thoughts.

Ebay item number 261157673372 is basically a reject 808nm diode that was just 5nm off the mark, hence why they are so cheap. Good company, up your way...quick shipping and specs on each diode you buy. You can even make an offer if you are buying a few. These also are definitely a full 1/2 watt...great IR illuminators. I have literally bought a couple hundred from them. They always list these for sale.
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