FLIR thermal infrared camera: Rubber Band hot/cold

[hboy007]

Wow cool, makes me want to build a pendulum heat pump with it! just build two clamps that grab the band exaclty at the points of reversal and pull the mass down with the "heat sink" clamp.

[TheUnknownGrower]

are you a fucking GROW RIPPER?????

[meterdatamanagement]

the prices will likely go down very soon but some people hope not!

[bastian74]

Why is a contracting rubber band endothermic?

[wbeaty]

@bastian74 Hmm, I haven't seen a detailed explanation. So, if we stretch and immediately release the rubber, does it return to init temp, acting like a near-ideal spring? But if we stretch, then wait for cooling, *then* release, did we cause cooling and observe the rubber perform excess work during contraction? Just a slight violation of thermo 2nd law. :)

[D3vin77]

I -3 u

[sandroac34]

great... thanks!



[DrakeMagnum]

that's a great demonstration. how much does one of those cameras cost?

[wbeaty]

@DrakeMagnum $7000 new, last time I checked. Must buy cheap by camping out on eBay, searching for just the right keywords, and bidding on every TSC Thermal Eye until you finally get one before other users bid it up past your price ceiling.

[DrakeMagnum]

@wbeaty That's pretty pricey, but hey, it's a truly amazing machine!

[DrakeMagnum]

@wbeaty That's pretty pricey, but hey, it's a truly amazing machine!

[coolaidkiller101]

@wbeaty IS IT POSSIBLE TO GET A THERMAL CAMERA CHEAPLY ,I MEAN AT THE PRICE OF A HD VISABLE CAMERA LIKE $150.OR A REALLY LOW QUALITY RESOLUTION CAMERA, MAYBE 240*320 THE CHEAPIST POSSIBLE PRICE.WHAT ACTUALLY COSTS THE MOST,LENS?

[wbeaty]

@coolaidkiller101 Very skilled at eBay might get one for $1000. Wait a few years, then find "FLIR Scout" used camera for under $1K. But those are too recent, so still no used cameras below $1000.

Silicon lens on my camera, way cheaper than Germanium military thermal lenses.

[chanctonbury63]

@DrakeMagnum Rubberbands are much cheaper.

[KiserSosei2U]

@DrakeMagnum Depends on the model. I can sell you the new Flir i3 for $1800 new. 

[yfg483792gew]

The disgustoscope + thermal infrared = awesome looking?

Try? :D

[jeffdobbelf]

cool :p didn't knew that

when i try this i can feel a little temprature difference but not much :p

[rebel4evr114]

are you able to invert the colors on the camera so that white means cold and black means hot? If you can do that maybe a fart would be able to be seen in thermal.

[wbeaty]

> invert the colors

Human bodies are surrounded by hot gas rising from the skin, and breathed out through mouth and nose. If you can make a camera see this plume of hot gas, then it will also see farts.

With this cheap thermal camera, gases only become visible if they're about 50C different from room temp (either hotter or colder.)

[ThrowingItAway]

no you can't see farts

[radar3699]

kinda boring.......

[jovesleejames]

thats why they say when your cold to move around

[wbeaty]

Carbon chains are always buzzing, and if mechanically stretched, energy is injected into those oscillations (they heat up.) If the stretching is released, they cool back to the initial temperature. But, if stretched and allowed to cool by convection, then when released, they cool down below the initial temperature.

It's possible to build a rubber band mechanical refrigerator, or a slow motor powered by small temp difference.

[TyrantsAREhere]

Hi, if you put a space blanket over your entire body, will it hide you? or a maybe a thermal blanket?

[wbeaty]

> space blanket over your entire body

That will hide your glow from distant cameras. But close up it will look like a crinkled silver bag. As with any camera, you cannot become invisible, but you can wear camouflage.

[LordOfPandemia]

predators have monochrome mode on their masks too, and i acctually prefer it, for when the false colour thermal imaging (closer to their natural sight) becomes jumbled or confusing. this is 33% or their reasoning for masks in the first place

[cptk3rk]

so they dont make thermal camera's that look like from the predator 1 movie where the colors are red and orange?

[wbeaty]

Those cost well over $5000.

If you want cheap, then you settle for monochrome display with no temperature degrees readings!

[bossoholic]

Yes they do, "false color" Thermal Imaging (same thing as above, except the heat is categorized into colors of different temperature)

[AIWAC]

I didn't know rubber bands got colder. Thank you.

[marvinerzz]

Cool vid. Is the temperature change caused by the stretching?

[blahdob]

Haha i noticed this,

i had a burst baloon and i kept stretching it across my face, and i noticed it got hotter when it stretched

[21pascal21]

SİKİLMİŞ FENERBAHÇE!!!

[MarkMash17]

the rubber band with the heat is the kinetic energy building up.

[harijoel]

tirate un pedo y aver como se ve

[DespiauCorp]

jajajaj!!

[Spanky00Cheeks]

science FTW

[guitarwand492075322]

cool!

[kupum]

can that thing pick up a fart

[wbeaty]

No, it can only see freon gas from a can of "Freeze Spray" The cold gas looks very black. See the "debunking" vid:

youtube com/watch?v=VvrIhz0NGrM

Hot gas looks white on normal FLIR. But gas is a poor emitter, and only shows up if the temperature is several hundred degrees F.

[kassem435]

yeah the gasses

[wbeaty]

> yeah the gasses

If it looks black, then it's extremely cold (freon "Freeze Spray")

The famous "infrared fart" hoax was done with freeze spray.

[kassem435]

ok ill try to fart infront of a infrared camare haha xD.

[wriddler]

dude just fart in front of the infrared camera so i can see the real thing lol

[wbeaty]

I tried it, and nothing happens. It's invisible, just a recording of someone's pants. Perhaps in the bathtub?!

[paronfisk]

Do it for the sake of the internet!

[akbarblanchet]

okay, i've been looking for answers online and such, and since i can't find information i'd like to ask for a demonstration hahaha!

Since a prism bends light, does a prism also bend infrared? if so, what does it look like? what else can a prism bend if it can bend light and infrared? Hoping for either a video or an explanation! Thank-you!! i love your videos mbeaty

[wbeaty]

Yep, prisms bend near-IR almost exactly the same as they bend red light. Search for graphs of refractive index versus wavelength for different types of glass, or information on thermal camera lenses.

Glass absorbs thermal long-IR fairly strongly, so instead you'd need a prism of germanium. Or silicon. Or polyethelene. My camera has a silicon lens (germanium is way expensive.) Don't forget that lenses are just dome-shaped prisms, and both are bending light.

[byergler06]

"Light" should not be thought of as just visible light, it encompasses all wavelengths of light. Infrared is just another wavelength of light and is bent by a prism just like visible light, as would any wavelength (maybe with the exception of high energy light, like gamma or x-rays, which may just pass right through). Invisible light was actually discovered accidentally when a thermometer was set right next to the red coming out of a prizm and the temperature went up.

[aeroscope]

i How much is one of those cameras?

[khonlao1]

zebra rubber band lol

[firedeval46]

Lol "REALLY COLD! Black!"

[tigercubgurlie]

rofl! you're silly! "hot! cold! hot! cold!"

[sirlonghair]

He should have done it in a super Grover voice.

[electrourge]

Thanks

[geoffleonard]

temperature looks damn messy. im glad its not something we can see

[xfpsnoob]

Rich man, got himself a FLIR. I got mine from russia. Its some cheap military thing, but it works.

[37474748]

do u know where and how i can get an flir camera?

[WholeWideWorld]

Try ebay, but they do cost $2,000 up and over $10k

[37474748]

wow that is expensive... would love to have one thogh... they are cool! :)

[wbeaty]

> wow that is expensive...

Go price some high end still cameras! Heh.

If you do electronics, you might take a chance on eBay with some broken repairable equipment. On the other hand, I suspect that scammers commonly sell unrepairable "as is" camera equipment, so don't buy from people with no reputation.

[37474748]

so true... repairing cameras aren't my best side... :)

[JakesOnline]

just curious. how would a cheap low power laser pointer look through the flir? would the beam be more visible because it heats the air?

[AScannerClearly]

I'd guess that a cheap red laser would be completely invisible on a FLIR, unless it's pointed at a dark object and kept on it. For red lasers, atmospheric absorption is very negligible. Even for Green or Blue, only an enormously tiny amount of energy would be lost to the air, so I'd think it'd take a very powerful laser (Maybe in the Watts range even) for a beam to heat air, and even then it'd probably be too feeble for FLIR to see.

[tippership]

You're getting into COLLOIDS, GUYS...and basic properties of Diffraction , and distortion,.......

[andrasiisi]

another nice educational vid. ty again

[2muchjpop]

kool my motorola krzr has this function

[mattdangerpaul]

You mean infrared vision, or are you referring to the negative image effect?

They don't build infrared vision into mobile phone cameras...

[FATRR148]

hahaha! what an idiot! your...cell phone... has an infared camera? oh man

[batukhan]

Well, the cellphone camera sensor DOES see infrared light. It has an infrared filter on it. If you take that off, and put a NORMAL-LIGHT filter (like tinted glass or similar) on it instead, then it will only show you infrared light, hence: infrared camera. But i doubt it will see the temperature differences

[wbeaty]

> i'm curious if a FLIR can see IR beams.

Light beams are always INvisible from the side, unless something scatters the light. (Laser beams in movies are wrong!) Trouble is, fog and dust does not scatter this sort of IR very much (my camera supposedly can see through fog, just like it sees through white plastic.)

Also, it can only see "thermal" IR like 10,000nM. Carbon dioxide lasers yes, diode IR lasers no.

[De3pFr3eZ]

i'm curious if a FLIR can see IR beams. Anyone know? Now i'm talking about the IR Beam or laser, NOT the IR Diode (POINT OF ORIGIN)

[wassim88]

sweet

[RackAttack8BC]

I would like to see practical ways to "beat" FLIR detection. Can you produce any? Look at this like a challenge. How many practical and easy ways can you "fool" FLIR? Make a video about that. That would be interesting.

[RackAttack8BC]

i.e. "Hide from it." Would a "mylar" or "thermal" blanket keep you from being "seen?"  Etc.

[1900belle]

The rubber band appears white/hot because it IS hotter when stretched out. The camera isnt' being fooled; those molecules are heated up when stretched.

Other fun with rubber bands: using a non-digital TV screen or old CRT monitor, stretch out a rubber band in front of it, then "strum" the band, and watch how slowly it moves...

[wbeaty]

> instead of using a FLIR dome to detect a vehicle, could it be set in such a manner to see IN a vehicle

Glass blocks most of thermal IR; appearing as a warm shiny surface. You'll have to ask drivers to roll down their windows! Or use backscatter x-ray, see the URL: as-e com/products_solutions/image_l­ibrary.asp

[UNSOF]

Is there any type of FLIR or E/O sensor that can be used at close range?? instead of using a FLIR dome to detect a vehicle, could it be set in such a manner to see IN a vehicle and only detect human heat from other heat signatures

[wbeaty]

> could it be set in such a manner to see IN a vehicle

Glass blocks most of thermal IR; appearing as a warm shiny surface. You'll have to ask drivers to roll down their windows! Or use backscatter x-ray, see the URL: as-e dot com/products_solutions/image_l­ibrary dot asp

[1900belle]

Glass doesn't block thermal energy. What does happen is that if the camera is angled incorrectly, then you get a reading of the space above or below the glass -- i.e., if you were aiming at upper story windows, the IR beam would bounce off the glass and read the temperature of the sky. A properly-aimed IR camera will read thermal images through glass. Radiant barriers are another matter.

[tippership]

NO IT WONT>...because glass's emissivity in MID/FAR IR.. i know what you're thinking , with silicon and all, but glass itself does EMIT enough IR....it's molecules aren't properly spaced to allow UNFILITEREd undistorted, EMfield effect photons of origin of that nanometer tange to see it..

Unless you're saying glass is transparent to IR... it is only until you PASS NEAR IR ....

[RammsteinFan080]

huh.... pretty cool, im guessing its the same scenario like when u get a piece of plastic and bend it back and forth quickly

[wbeaty]

> Whatever you purchased it's sooo old.

Lol.  It's a Raytheon/L3 Forward Looking Infra Red security camera. You should be well aware that bolometer array image sensors are called "FLIR" and there are lots of companies besides the one that took FLIR as its name.

[clutchlikewoah]

Nowadays they refer to microbolometers as Focal Plane Arrays.

[TechnicalFreak]

Whatever you purchased it's sooo old.. The new ones from FLIR Systems (Danderyd/Sweden) use a more advanced "heat signature". Is the one you have built by FLIR? I happen to know the guy who makes them.. all of them.

[slikkk1]

...really? I went to a Building Science seminar at Flir in Billerica, MA...It was pretty informative although it sucked sitting around a bunch of guys with brand new cameras and no formal scanning experience... I've only done a couple hospitals, a foundry, sandpaper factory etc... I used a Inframetrics camera...

[Altomage09]

Haha, I never thought of how much a Rubber Bands Tempurature would change.

[skatingdrummerboy]

yeah nice work mate very useful info for skool cya around

[OniLinkSword]

That's awsome. :)

[Russoft]

That is awesome man! But...I just wrote my thermodynamics exam today and I don't want to think about heat transfer or entropy, or any of that other nasty stuff right now. haha. Cool video! Keep it up!

[PixelPi]

That would be a great educational physics demonstration, how did you make your FLIR camera?

[wbeaty]

I bought a "TSC" thermal-eye security camera used on e-Bay. When new from L3 corp they cost $6000. Mine was $1600

[tippership]

WOW, that's a GREAT STEAL ;considering most , ANYWHERE , dont get cheaper than 8000