|ÖBB 1020 018, Kleblach-Lind 12-08-2017|
Henk Zwoferink posted a photo:
In het laatste licht van de dag passeert de ÖBB 1020 018 met vier "Schlieren-wagens" het dorpje Kleblach-Lind onderweg naar Lienz.
|Tue, 10 Apr 2018 12:17:17 -0700|
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ÖBB 1020 018, Lend 12-08-2017|
Henk Zwoferink posted a photo:
Het doel om te fotograferen op de brug over de Salzach was de fraaie 1020 018 met een viertal "Schlierenwagens". De trein was onderweg vanuit Lienz naar Zell am See als het bezig is met het laatste stukje van de reis.
|Sun, 08 Apr 2018 09:31:06 -0700|
heuberg salzburg oostenrijk at 1020 018 öbb krokodil henk zwoferink lend schlieren lienz jaffaschlieren förderverein 102018 eisenbahnfreunde verein der ebfl zell am see
|Kleines Universum / Little Universe|
Miz Müller posted a photo:
Öl + Wasser / Oil + Water
|Sun, 11 Mar 2018 21:02:00 -0700|
macromondays imperfection macro makro öl oil tabletop closeup canoneos tamron90mm kreis rund blasen bubbles indoor wasser water schlieren abstrakt oilwater ölwasser universum galaxie sterne spühlmittel dishsoap macrounlimited 7dwf
How one can Seize Warmth on Digital camera With out Costly Optics|
takenews posted a photo:
Customary schlieren imaging methods use a big mirror to have the ability to visualize warmth or stress variations in air. The issue with these methods is that they require massive precision telescope mirrors which can be very costly. My lab is lucky to have a 13-inch diameter telescope mirror;...
Customary schlieren imaging methods use a big mirror to have the ability to visualize warmth or stress variations in air. The issue with these methods is that they require massive precision telescope mirrors which can be very costly. My lab is lucky to have a 13-inch diameter telescope mirror; however what occurs once I have to a bigger topic?
A contemporary variation of the optical schlieren method is to make use of no mirrors in any respect however to have a look at the distinction between two digital pictures. This system is extremely simple and was first developed by NASA to have a look at shock waves created by airplanes (in supersonic flight).
The strategy of Background Oriented Schlieren (BOS) imaging makes use of an image of random optical noise. The simplest method to get a big floor coated with random optical noise is to get a big roofing shingle. The roofing materials we use within the lab got here from a neighborhood ironmongery store. We have been capable of get a 36-ft. roll of white fiberglass mineral-surface roofing for round 50 .
The floor is properly lit from a single flash set to a high-speed setting. The next photos have been taken with an Einstein flash at 1/64th energy setting. The digital camera lens is ready to its highest decision setting of f/four.zero and the main focus is ready to the roofing materials. The digital camera needs to be set to gather RAW pictures. This system is not going to work with JPG settings because of the knowledge that’s misplaced within the JPG compression.
We’re taken with optical rays which can be deviated from their path by the refractive index change of the air. We’re not within the rays that originate from the candle or the mannequin. That is after all very totally different than regular pictures. As rapidly as attainable, the 2 pictures are taken – one of many background with no warmth supply and the second picture with the warmth supply.
To extract the warmth picture (BOS) the background picture is ready to the underside layer in Photoshop. The picture with the warmth is positioned above the background picture and set to distinction. The following step is to create a curves adjustment layer and transfer the curves far to the left to make the warmth disturbance seen.
There’s a second modification of this method that permits the warmth to be seen however isn’t so helpful for scientific work because it generates a double picture. This system makes use of the distinction between two sequential pictures — on this case, the coed holding the candle. The scholar tried to carry the candle as nonetheless as attainable as they gently blew air on the flame. There’s a slight motion between the photographs.
These first two pictures have been taken a second aside:
An fascinating facet observe about this BOS is it doesn’t work very properly with video. Most video has a compression and makes use of keyframes. The video compression throws out loads of the delicate knowledge required for this method. The take a look at movies I’ve tried lead to having unusual artifacts from the video compression. If the reader has entry to an uncompressed video recording they need to experiment on this space.
Supersonic bullets additionally create a high-intensity shockwave that’s extremely seen in BOS imaging. To check this within the lab we fired a .22-long bullet touring at 1,200 toes per second. That is about 200 toes per second above the velocity of sound and creates a pleasant shock wave. For this picture, the .22 spherical was fired just a few inches above a desk prime that had a metal plate positioned on it to point out the reflection of the shockwave.
A and B are shock waves from the ignition of the gunpowder within the bullet casing. The picture was taken two toes from the top of the gun, and the bullet will finally overtake these two comparatively sluggish shockwaves touring on the velocity of sound.
C is the shockwave from the entrance of the bullet, whereas D is created from the top of the bullet. E is the turbidity from the top of the bullet. F is the shock wave from the top of the bullet reflecting off the metal block on the desk. G is the rainbow colour which is an artifact from the air-gap flash not following the very same path on the 2 pictures used to construct this BOS picture. The flash used right here was a SPOT flash working at 500ns durations.
Particular due to RIT Scholar Clancy Morgan for permitting me to make use of his picture for this text.
I hope the reader decides to do this method for themselves. There are loads of backgrounds that may be discovered outdoors that may be capable of create BOS pictures. Sand, car parking zone asphalt, corn fields, branches on timber, and leaves will all work as a background. Exit and provides this method a strive.
Concerning the creator: Ted Kinsman is an assistant professor of photographic expertise on the Rochester Institute of Expertise. He teaches superior photographic expertise, gentle microscopy, and macro pictures programs. Kinsman focuses on making use of physics to pictures. You’ll find extra about him and his work in his school profile and on his web site.
|Sun, 18 Feb 2018 03:57:38 -0800|
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capobon49 posted a photo:
|Tue, 03 Apr 2018 09:44:48 -0700|
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capobon49 posted a photo:
|Tue, 03 Apr 2018 09:44:37 -0700|
schlieren zürich schweiz ch
.orbod posted a photo:
|Tue, 06 Mar 2018 11:26:27 -0800|
köln bahn zug bahnsteig nacht langzeit schlieren
charles.caer posted a photo:
The Uri Rotstock (2928 m) and Schlieren (2830 m) as seen from Schwyz.
|Thu, 01 Mar 2018 04:34:50 -0800|
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d.pista posted a photo:
A GYSEV 470 503 "Wagner" mozdonya érkezik a 9154 Sopron - Szentgotthárd személyvonattal Kópházára. A vonat végén egy MÁV Start IC kocsi volt amit Szombathelyre vittek és a 470 504 ami a hátsó három Schlieren kocsival a 9165-ös soproni személyvonatra fordult vissza.
GYSEV/Raaberbahn 470 503 ist mit dem Regionalzug 9154(Sopron-Szentgotthard) in die Haltestelle Kophaza angekommen. Am Zugschluss sehende 470 504 und die letzte drei Schlieren Wagen sind mit dem 9165 nach Sopron zurück gefahren. Der MAV Start IC Wagen hat einfach nach Szombathely überstellt.
|Sun, 25 Feb 2018 08:54:16 -0800|
gysev raaberbahn gysev470 gysevwagner gysev1047 schlieren gysevschlieren
zeh.hah.es. posted a photo:
|Tue, 13 Feb 2018 11:45:48 -0800|
fassade façade zaun fence zäune fences trainingsfeld fussballfeld gras grass grün green grau grey gray schwarz black ktzh schlieren kantonsapotheke apotheke schweiz switzerland