Polarised optical filter material

K

Kryten

Jan 1, 1970
0
Hi all.

For an electronic project, I'm wanting a couple of small discs of polarised
transparent plastic. The kind of thing you see in science fairs to
demonstrate the polarisation of light.

Anybody know where I can get some in the UK?

I did google for it but got swamped by references to cameras and glasses
etc.

TIA, K.
 
J

John Fields

Jan 1, 1970
0
Hi all.

For an electronic project, I'm wanting a couple of small discs of polarised
transparent plastic. The kind of thing you see in science fairs to
demonstrate the polarisation of light.

Anybody know where I can get some in the UK?

I did google for it but got swamped by references to cameras and glasses
etc.
 
D

Dan Hollands

Jan 1, 1970
0
look for a pair of non prescription polarized sunglasses.

I have often seen the type that are just some formed plastic that fit over
regular glasses.

Dan

--
Dan Hollands
1120 S Creek Dr
Webster NY 14580
585-872-2606
[email protected]
www.QuickScoreRace.com
 
K

Kryten

Jan 1, 1970
0
John Fields said:
Edmund Scientific

Edmund Scientific are in the USA - I can't see a UK site.

Their Optics section just sells this pair of 3" diameter filters:
http://scientificsonline.com/product.asp_Q_pn_E_3038605
A bit dear at $30 (c.£20).

A 1" disc would be a ninth of the material, and hopefully be proportionately
cheaper. I only need to shine a single LED through the two filters.

look for a pair of non prescription polarized sunglasses.

I have often seen the type that are just some formed plastic that fit over
regular glasses.

Hmm, I may have some old cheap shades I can cannibalise.

Shades have curved material, but I suppose that is not going to be a problem
for a prototype.
 
S

Spehro Pefhany

Jan 1, 1970
0
Edmund Scientific are in the USA - I can't see a UK site.

Their Optics section just sells this pair of 3" diameter filters:
http://scientificsonline.com/product.asp_Q_pn_E_3038605
A bit dear at $30 (c.£20).

A 1" disc would be a ninth of the material, and hopefully be proportionately
cheaper. I only need to shine a single LED through the two filters.



Hmm, I may have some old cheap shades I can cannibalise.

Shades have curved material, but I suppose that is not going to be a problem
for a prototype.

Are they circularly or linearly polarized?

If you just need tiny pieces you might be able to canibalize a cheap
pair of 3-D glasses. A quick google finds an outfit in California for
a couple of dollars US for 3 pairs of crap cardboard polarizing
glasses, plus 5 quid or so to get them to the UK by airmail.


Best regards,
Spehro Pefhany
 
K

Kryten

Jan 1, 1970
0
Are they circularly or linearly polarized?

Just the plain old linear.
If you just need tiny pieces you might be able to
cannibalize a cheap pair of 3-D glasses.

I recall those having two colours.

Which added to the charming cheesiness of such movies.
A quick google finds an outfit in California for
a couple of dollars US for 3 pairs of crap cardboard polarizing
glasses, plus 5 quid or so to get them to the UK by airmail.

Indeed.

I was just looking for a place in the UK.
Surely someone sells the stuff here...
 
J

John Fields

Jan 1, 1970
0
Edmund Scientific are in the USA - I can't see a UK site.

---
There's one there, nonetheless.
---
Their Optics section just sells this pair of 3" diameter filters:
http://scientificsonline.com/product.asp_Q_pn_E_3038605
A bit dear at $30 (c.£20).

---
So, they have you want but not at the price you want? Oh, well...
Quit, then.
---
A 1" disc would be a ninth of the material, and hopefully be proportionately
cheaper. I only need to shine a single LED through the two filters.

---
So what? None of us (me, anyway) gives a shit. Stop whining and
spend what you have to in order to get to your goal or just shut the
**** up.

This isn't
please.can.you.help.me.find.some.cheap.polarizing.material,
so when your query yields a good solution, but one which you find
pecuniarily unattractive, don't bitch. Just go away.
 
K

Kryten

Jan 1, 1970
0
So, they have you want but not at the price you want?
Oh, well...
Quit, then.

It is one solution, but one always does a bit of shopping/asking around for
the best solution. If that's the best solution, I'll take it. But I suspect
the polaroid film itself only costs a few cents, not dollars.
None of us (me, anyway) gives a shit.

I'm sorry to hear that, but maybe you'll find an effective laxative and that
will all change.
Stop whining and
spend what you have to in order to get to your goal or just shut the
**** up.

Well, you seem to give a large enough shit
to post a rude reply.

I don't do that even for the most clueless newbie.

Nobody is obliged to post replies here.
This isn't
please.can.you.help.me.find.some.cheap.polarizing.material,
so when your query yields a good solution, but one which you find
pecuniarily unattractive, don't bitch. Just go away.

A lot of engineering revolves around finding the most cost-effective
solutions to a problem. Somebody said a good engineer can do a job well for
$3 of parts what anyone could do for $30.

There were perfectly good hand-made custom built motor cars before Henry
Ford.
And perfectly good computers before Apple.

There are likewise other solutions to do what I want to do but they are
extremely expensive and far more accurate than I need.

And it isn't a matter of being too mean to stump up cash.
My idea needs the polarised items to rotate - and change speed - pretty
fast, therefore being smaller and lighter reduces the angular inertia.

If any gentlemen/women happen to know any good places in the UK for buying a
bit of polarised film/glass cheaply, that would be absolutely tickety boo if
it is not trouble.

Other types of persons need not bother to give a shit, a ****, or an
irritated reply.

Thanks, K.
 
D

Don Foreman

Jan 1, 1970
0
A lot of engineering revolves around finding the most cost-effective
solutions to a problem. Somebody said a good engineer can do a job well for
$3 of parts what anyone could do for $30.

Sometimes true -- but to do that they buy worldwide.

Other UK buyers of polarizing film have clearly found this
supplier quite acceptable:
http://www.3dlens.com/enter.html
 
Hi Kryten !

I have some linearly polarized about 0.5 mm thick film. I can send you
some trough the mail.
Don't cost much for me and makes your project alive.

Cheers,

Janne, OH1GTF from Finland

PS. I'm pretty confused about John's reply.
 
J

John Devereux

Jan 1, 1970
0
Kryten said:
If any gentlemen/women happen to know any good places in the UK for buying a
bit of polarised film/glass cheaply, that would be absolutely tickety boo if
it is not trouble.

Farnell and RS do sheets of *circularly* polarising plastic for use as
antireflective display filters. A few quid each IIRC.
 
I

Ian Stirling

Jan 1, 1970
0
Kryten said:
Hi all.

For an electronic project, I'm wanting a couple of small discs of polarised
transparent plastic. The kind of thing you see in science fairs to
demonstrate the polarisation of light.

Anybody know where I can get some in the UK?

I did google for it but got swamped by references to cameras and glasses
etc.

Buy a very cheap calculator.
Open it up, and in front of the display, the bit of plastic is a polariser
that may suit.
 
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