Experiments with cross polarising (updated with the forgotten bits)

cleary · 1st August 2012, 8:45 PM

I was doing a bit of reading on this last night, and thought I'd have a bit of a play with whatever stuff was lying around the house - I haven't seen anyone post anything about it here, so thought it might be of interest

Polarised backlight source (all-white computer screen) + random plastic objects + polarising filter:

1.

2.

3.

4.

5.

...and some glass objects which behaved very differently

6.

7.

Edit: forgot the bubblewrap
8.

9.

Modafroman · 1st August 2012, 8:58 PM

http://en.wikipedia.org/wiki/Photoelasticity

mmmmmm physics and stress analysis

(from first year statics)

I like number 4

The_Shadow · 2nd August 2012, 7:13 AM

That's really quite cool, I really like from 4 onwards, I really like the way the glass stuff came out, gives me an oldschool/steampunk feeling.

^catalyst · 2nd August 2012, 11:17 AM

Cool! Love the ruler and the light globe!

cleary · 2nd August 2012, 12:06 PM

Thanks fellas - I just realised I've managed to leave out my favourite shots from it (bubble wrap). I'll update that tonight -

@moda, thanks for the link (I think!). I haven't seen that level maths in a long time... and I haven't understood it in an even longer time

@shadow/lachie - while the glass is not really doing anything interesting in terms of colours, I figured it was worth putting up since it could give an interesting perspective when doing product shots (for the right kind of products)

aaaaah · 2nd August 2012, 12:23 PM

The ruler shot is excellent, I'm interested to see the bubble wrap. Was there much work done to keep the backgrounds completely black, or did the polarisation do the job.

And I just realised it's been 8.5 years since i learned photoelasticity at uni...

cleary · 2nd August 2012, 12:57 PM

Quote:

Originally Posted by aaaaah

The ruler shot is excellent, I'm interested to see the bubble wrap. Was there much work done to keep the backgrounds completely black, or did the polarisation do the job.

There was no work asides from cleaning the screen, the polariser blacked out the backlighting screen - all the objects were sitting on a white screen at full brightness.

Quote:

And I just realised it's been 8.5 years since i learned photoelasticity at uni...

I was having a similar (only worse) realisation about how long it's been since uni (no point in counting the half years anymore

)

cleary · 2nd August 2012, 7:16 PM

Added the bubblewrap (it was the big kind)

aaaaah · 2nd August 2012, 8:14 PM

Bubble wrap works extremely well. Definitely a lot of potential in this for some abstract shots.

Nicely done.

scon · 12th August 2012, 8:11 PM

I came here from the post on the front page and I thought the pic of the bubble wrap was a kaleidoscopic picture of synchronised swimming! :P

cleary · 13th August 2012, 4:45 PM

Quote:

Originally Posted by scon

I came here from the post on the front page and I thought the pic of the bubble wrap was a kaleidoscopic picture of synchronised swimming! :P

Cool I didn't realise it'd been linked

Interesting interpretation of the bubblewrap btw - maybe I could do a set for psychological testing purposes?

1st August 2012, 8:45 PM	#1
cleary Mental in the Face Join Date: Apr 2003 Location: Griffith NSW Posts: 3,928	Experiments with cross polarising (updated with the forgotten bits) I was doing a bit of reading on this last night, and thought I'd have a bit of a play with whatever stuff was lying around the house - I haven't seen anyone post anything about it here, so thought it might be of interest Polarised backlight source (all-white computer screen) + random plastic objects + polarising filter: 1. 2. 3. 4. 5. ...and some glass objects which behaved very differently 6. 7. Edit: forgot the bubblewrap 8. 9. __________________ SmugMug Last edited by cleary; 2nd August 2012 at 7:15 PM.

1st August 2012, 8:58 PM	#2
Modafroman Member Join Date: Jul 2002 Location: Brisbane Posts: 9,110	http://en.wikipedia.org/wiki/Photoelasticity mmmmmm physics and stress analysis (from first year statics) I like number 4 __________________ Audio: Westone 3 \| Hifiman HE-400 \| Matrix M-Stage Amp \| AT AD700 \| Photo: 5D Mk3 \| X100S \| 17-40mm/24-105mm/70-200mm f4L \| Σ 50mm f1.4 \| \o/CHAIR RAVER \o/ PC: i7 920@3.85Ghz \| Asus P6T-D \| 12GB Gskill \| Asus GTX680 DC2 \| Corsair H70+2xGTs \| OCZ Vertex 3 120GB \| 8TB HDDs \| Creative X-Fi Ti HD \| Fractal Design Define XL \| Corsair HX1000 \| Dell U2711+U2311 \|

2nd August 2012, 7:13 AM	#3
The_Shadow Member Join Date: Dec 2005 Location: Melbourne Posts: 502	That's really quite cool, I really like from 4 onwards, I really like the way the glass stuff came out, gives me an oldschool/steampunk feeling. __________________ My Flickr Let the Dragon ride again on the winds of time. Last edited by The_Shadow; 2nd August 2012 at 3:07 PM.

2nd August 2012, 12:06 PM	#5
cleary Mental in the Face Join Date: Apr 2003 Location: Griffith NSW Posts: 3,928	Thanks fellas - I just realised I've managed to leave out my favourite shots from it (bubble wrap). I'll update that tonight - @moda, thanks for the link (I think!). I haven't seen that level maths in a long time... and I haven't understood it in an even longer time @shadow/lachie - while the glass is not really doing anything interesting in terms of colours, I figured it was worth putting up since it could give an interesting perspective when doing product shots (for the right kind of products) __________________ SmugMug

2nd August 2012, 7:16 PM	#8
cleary Mental in the Face Join Date: Apr 2003 Location: Griffith NSW Posts: 3,928	Added the bubblewrap (it was the big kind) __________________ SmugMug

2nd August 2012, 11:17 AM	#4
^catalyst Member Join Date: Jun 2001 Location: melbourne Posts: 10,134	Cool! Love the ruler and the light globe!

2nd August 2012, 12:23 PM	#6
aaaaah Member Join Date: Nov 2007 Posts: 418	The ruler shot is excellent, I'm interested to see the bubble wrap. Was there much work done to keep the backgrounds completely black, or did the polarisation do the job. And I just realised it's been 8.5 years since i learned photoelasticity at uni...

2nd August 2012, 8:14 PM	#9
aaaaah Member Join Date: Nov 2007 Posts: 418	Bubble wrap works extremely well. Definitely a lot of potential in this for some abstract shots. Nicely done.

12th August 2012, 8:11 PM	#10
scon Member Join Date: Sep 2005 Location: Canberra Posts: 4,558	I came here from the post on the front page and I thought the pic of the bubble wrap was a kaleidoscopic picture of synchronised swimming! :P __________________ Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. Douglas Adams, "Last Chance to See" - 1990 Food Blog: Wok the Fuck?!