Old 08-02-2016, 02:26 PM #1425
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Default Re: Post your random pics!

Quote:
Originally Posted by Pman View Post
On my porch and how I feel
Yeah, I feel you on that this morning.


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Old 08-04-2016, 04:59 AM #1426
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Default Re: Post your random pics!

Tried something else last night with light painting, I had a length of LED tape and just kinda flailed it around for 5 seconds in the dark, ISO 100 f29. Think of these images here as thumbnails, because resizing them really ruined the photos, I feel like half of the beauty of these photos is how sharp and well defined they are, so full res album at the end. They make great backgrounds, eh? eh?














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Old 08-06-2016, 05:17 PM #1427
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Old 08-21-2016, 07:53 PM #1428
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Old 09-07-2016, 01:38 PM #1429
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Default Re: Post your random pics!

Agreed, certainly an envious scene. Can't give anymore rep today. Been too generous.
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Old 09-23-2016, 02:00 PM #1430
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Default Re: Post your random pics!

Driving through Erbil, Iraq yesterday - Kurdish country, I'm working to support the DoD SATCOM network, pushing ISIS out of the region, they have already been forced out of this city.

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Old 09-23-2016, 02:08 PM #1431
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Default Re: Post your random pics!

Keep up the good work Alaskan. Stay safe.
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Old 09-23-2016, 02:13 PM #1432
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Default Re: Post your random pics!

Fairly rare I would leave base like that to drive through the city, but did so this one time with an amount of pucker factor. No one seemed to pay notice to us.
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Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

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

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

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Old 09-23-2016, 02:18 PM #1433
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Default Re: Post your random pics!

Well, that is a good thing no-one was interested. But being nervous in a place like that is only natural. Just don't put yourself at risk.
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Old 09-23-2016, 05:34 PM #1434
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Default Re: Post your random pics!

Maybe not random, but I like these pictures I tok.
Two pictures of my argon ion at 7A or somewhere around 40mW.



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Old 09-23-2016, 05:57 PM #1435
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Default Re: Post your random pics!

Was rearranging some wireless antennas/dishes (Obviously wireless... what else are antennas for? 900Mhz and 24Ghz IIRC) on top of one of the taller buildings in Yellowknife last week - took some pictures while I was up there. That's not me at the left, friend of mine whom I was helping. No edges on that building, just a straight drop off the edge ... that makes me uneasy.


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Old 09-23-2016, 08:21 PM #1436
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Default Re: Post your random pics!

Nice shot Diachi, I've always wanted to shoot a laser off a roof just because of how easy it would be. Since you have a higher altitude you can find targets off in the distance that you can be sure won't hit anyone, for example in your picture I would probably aim for the island (as long as it's uninhabited)
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Old 09-24-2016, 04:42 AM #1437
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Default Re: Post your random pics!

Don't think I've shared this here before. When I was like 11 or 12 I was dicking around with my friends making baking soda and vinegar bombs, you know when you fill a water bottle with said ingredients and seal it off and wait for the fun to happen? Well we ran out of water bottles, and thought "hey, more bottle more better right?!" so we used a 2 litre pop bottle. The problem is, those things are pressure rated, so it doesn't go off on its own. Cue the stick poking, kicking, and eventually throwing. It was a blast, and then came my turn again to have a click at the plastic cat. So I overhead throw it like donkey kong, but by the will of the gods it lands perfectly in the cap: reference figure one for an accurate example:



So yes, the 2L goes rocketing towards me at approximately Mach 10, heading straight for below the belt. BUT. Time freezes. My life, and the life of my future childrens', flashes before my eyes. I feel my pupils dilate, the blood coursing through every capillary, and I summon the ninja-level strength and agility to leap out of the way. I'm saved! ...except for my knee. The way I got the dangerous targets out of the line of fire requires me to somehow flail my leg up and put the side of my knee into the path.
And so it strikes.
It was about a third full of vinegar, so it felt about like a medium baseball bat swing right to the nerves and bones around in there. The only evidence remaining is a photo I found in a a backup of my moms phone, here's the bruise after about two or three days I think:

Note how that's the pattern of the bottom of the 2L bottles. Or the flowers in the sky in Bikini Bottom. Or Hawaiian shorts.
so yeah. that's the story of the week.
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Old 09-24-2016, 04:23 PM #1438
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Default Re: Post your random pics!

OUCH, cool video showing how.
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Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

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

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3
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Old 09-24-2016, 06:32 PM #1439
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Default Re: Post your random pics!

That bottle looks more like a champagne bottle than a two liter soda pop bottle. Is that a Canadian thing? Also, from the video, it looks like it strikes about waist height. Was there more that didn't make it onto the video? Two liter pop bottles have been made of plastic here fro a very long time, but that one seems to be glass. Ouch, indeed.
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Old 09-24-2016, 06:48 PM #1440
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Default Re: Post your random pics!

Quote:
Originally Posted by paul1598419 View Post
That bottle looks more like a champagne bottle than a two liter soda pop bottle. Is that a Canadian thing? Also, from the video, it looks like it strikes about waist height. Was there more that didn't make it onto the video? Two liter pop bottles have been made of plastic here fro a very long time, but that one seems to be glass. Ouch, indeed.
Oh whoops, I think you misunderstood, I should've made that more clear. That first gif is not me, that's an old gif from somewhere else. I used it because it's just about exactly what happened, except with a pop bottle. Yea that's a champagne bottle in the gif, I would definitely not wanna be struck by that lol. Also no, the pop bottle is standardized so it's the same here as for you. You can look at the bottom of a soda bottle and match it up to the bruise I got
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