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View Poll Results: Should we do an LPF version of the Banana Peel Challenge?
Yes, sounds like fun and would produce some funny videos. 4 28.57%
No, sounds stupid and someone could get hurt. 10 71.43%
Voters: 14. You may not vote on this poll

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Old 11-16-2016, 10:11 PM #1
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Talking LPF's Banana Peel Challenge

Dangerous new "Banana Peel Challenge" has teens wiping out for likes - CBS News




We should do an LPF version of this where members of the forum post video of themselves falling on banana peels. Whoever has the funniest video get a laser related prize.


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Old 11-16-2016, 11:10 PM #2
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Default Re: LPF's Banana Peel Challenge

This is stupid and won't be surprised when someone hits their head on a kitchen table corner and dies.

Honestly though, this is just an accident waiting to happen.

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Old 11-16-2016, 11:34 PM #3
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Default Re: LPF's Banana Peel Challenge

You won't catch me slipping on a banana peel, and I feel sorry for the one who tries to hard for a like and turns up brain dead or dead.

Anyway, if you want to make one I'll LMAO at you no worries.
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Old 11-16-2016, 11:41 PM #4
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Default Re: LPF's Banana Peel Challenge

This is pathetic IMO. Nothing better to do than throw a banana peel on the floor and intentional make yourself fall? Confused beyond belief right now

Not trying to be hateful towards anyone, but really, seems like a waste of time. While the "life threatening" danger might be stretching it, it's still not a smart thing to do and can hurt you. To each his own I guess...
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Old 11-17-2016, 12:08 AM #5
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Default Re: LPF's Banana Peel Challenge

More like Darwin award challenge #249.
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Old 11-17-2016, 12:17 AM #6
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Default Re: LPF's Banana Peel Challenge

Terrible idea. Who wants to get hurt? Answer: Nobody
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Old 11-17-2016, 02:31 AM #7
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Default Re: LPF's Banana Peel Challenge

This only slightly less dumb than that stupid choking game fad they even talked to us about it back in HS. WTF is wrong with some humans. I swear everytime some one comes up with an idea someone makes a double dumbassed idea. Like I learned today about this new gimmick. People will yell freeze at a random person walking and snap a picture of him/her. Great idea until someone wanted by the cops and has a gun on him is called out. Then your prank turns from "omfg this is so lolz worthy look at the reaction." to "oh cra-gunshots" along with it being deadly.
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Old 11-17-2016, 05:12 AM #8
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Default Re: LPF's Banana Peel Challenge

Voted yes obviously.

I've always wanted a brain aneurysm.
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Old 11-17-2016, 06:32 PM #9
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Default Re: LPF's Banana Peel Challenge

People would do this?! Falling slipping and hitting the back of my head is one of my top fears tbh.
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Old 11-18-2016, 12:04 AM #10
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Default Re: LPF's Banana Peel Challenge

How about a laxative Pokémon Go challenge.
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Old 11-18-2016, 04:22 PM #11
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Default Re: LPF's Banana Peel Challenge

Who wants to do the Jump of cliff challenge.
Seriously why?
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Old 11-18-2016, 04:25 PM #12
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Default Re: LPF's Banana Peel Challenge

How about how long you can hold your hand in front of a 800mw 405nm laser?
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Old 11-18-2016, 04:28 PM #13
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Default Re: LPF's Banana Peel Challenge

Ouch. That would be painful.
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Old 11-18-2016, 04:30 PM #14
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Default Re: LPF's Banana Peel Challenge

Stings like a hornet, only takes a second.
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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 Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 11-18-2016, 04:40 PM #15
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Default Re: LPF's Banana Peel Challenge

I burnt my thumb with an M140 once. Ever since then, I am very careful with crossing the path of a Class IV.
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Notable products/sites:

Jet Lasers offers various high quality Diode/DPSS Portables in their PL-E Pro hosts. Jet Lasers are known for their quality and are respected on LPF.
Jetlasers PLE Pro's

If you are after an RGB module, you can't go wrong with Optlasers. Their 400mW model is very high quality.
Optlasers RGB Modules

Optotronics offers some of the highest output DPSS Portable Greens on the market. Their 1.4W RPL-II is by far their most amazing product and is known to be overspec.
Optotronics RPL 532nm DPSS Portables

Dragon Lasers offers the best option for 589nm (Yellow) Laser pointers.
Dragon Lasers Yellow Laser Pointers

Sanwu are known to be very high quality and every newcomer should check them out.
Sanwu Home

Bang good is a good source for many electrical items and are often cheap and reliable.
Bang Good Home

For reliable safety goggles visit Survival Laser. Use LPF445 for a 10% member discount.
Eagle Pair Safety Goggles

For more sites and information please check out this thread.
Which company should I buy from? By Sta






Useful Links:
Wavelength to RGB Converter
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Old 11-18-2016, 04:51 PM #16
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Default Re: LPF's Banana Peel Challenge

140 ain't so bad, not compared to a single mode 405nm near UV, I guess I can call it that....
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


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 Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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