I know the IORs of water and glass are 1.33 and 1.5, but there are a number
of materials that it would be handy to know the IORs for.

Perspex
PET (plastic, recycling number 1)
Pyrex
Quartz glass

If anyone can give the IORs of these substances (and any others) please
reply to this message with them.

Rohan _e_ii

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On Sun, 28 Jul 2002 23:33:23 EDT Rohan Bernett wrote:

>I know the IORs of water and glass are 1.33 and 1.5, but there are a number
>of materials that it would be handy to know the IORs for.
>
>Perspex
>PET (plastic, recycling number 1)
>Pyrex
>Quartz glass
>
>If anyone can give the IORs of these substances (and any others) please
>reply to this message with them.

  The following are in the docs, section 7.4.6:

Air_Ior = 1.000292 
Amethyst_Ior = 1.550 
Apatite_Ior = 1.635 
Aquamarine_Ior = 1.575 
Beryl_Ior = 1.575 
Citrine_Ior = 1.550 
Crown_Glass_Ior = 1.51 
Corundum_Ior = 1.765 
Diamond_Ior = 2.47 
Emerald_Ior = 1.575 
Flint_Glass_Ior = 1.71 
Flint_Glass_Heavy_Ior = 1.8 
Flint_Glass_Medium_Ior = 1.63 
Flint_Glass_Light_Ior = 1.6 
Fluorite_Ior = 1.434 
Gypsum_Ior = 1.525 
Ice_Ior = 1.31 
Plexiglas_Ior = 1.5 
Quartz_Ior = 1.550 
Quartz_Glass_Ior = 1.458 
Ruby_Ior = 1.765 
Salt_Ior = 1.544 
Sapphire_Ior = 1.765 
Topaz_Ior = 1.620 
Tourmaline_Ior = 1.650 
Water_Ior = 1.33

  Rather than copy and paste, here's the .url for one chart I found
using Google:

http://hokum.freehomepage.com/Content/Reference/Ref_Refract.html

-- 
Alan
ako### [at] povrayorg
a k o n g <at> p o v r a y <dot> o r g

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Rohan Bernett wrote:
>I know the IORs of water and glass are 1.33 and 1.5, but there are a number
>of materials that it would be handy to know the IORs for.
>
>Perspex
>PET (plastic, recycling number 1)
>Pyrex
>Quartz glass
>
>If anyone can give the IORs of these substances (and any others) please
>reply to this message with them.
>
>Rohan _e_ii
>
http://www.luxpop.com/

=RAY=

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Unfortunatly, the lists supplied by you and the other fellow who replied to
my original message do not mention the substances I was looking for (except
for the Quartz). :-(

Rohan _e_ii

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"Rohan Bernett" <rox### [at] yahoocom> wrote in message
news:web.3d44b783314cfd0118ccf4f70@news.povray.org...
> I know the IORs of water and glass are 1.33 and 1.5, but there are a number
> of materials that it would be handy to know the IORs for.
>
> Perspex
> PET (plastic, recycling number 1)
> Pyrex
> Quartz glass
>
> If anyone can give the IORs of these substances (and any others) please
> reply to this message with them.

Well, I don't think the include file at the following site has those specific items,
except quartz maybe, but here's a link I
know about.
http://seasoft.tecbox.com/Pov/NewIOR.html

Maybe something in there is close to Perspex or Pyrex or other plastic of interest.

--
Robert Chaffe
http://www.donovansweb.com/~chaffe/

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Rohan Bernett wrote:
>I know the IORs of water and glass are 1.33 and 1.5, but there are a number
>of materials that it would be handy to know the IORs for.
>
>Perspex
>PET (plastic, recycling number 1)
>Pyrex
>Quartz glass
>
>If anyone can give the IORs of these substances (and any others) please
>reply to this message with them.
>
>Rohan _e_ii
>
I don't know the IOR of pyrex but I _do_ know it is essentially equal to
that of Wesson Corn Oil.  Really.  Submerge a pyrex lab beaker in a bowl
full of Wesson, and the beaker disappears.  It's the coolest physics demo I
do in my class.

To be marginally more useful, this site (<a
href="http://www.rom.on.ca/wwatch/teachers-kit/disappearing.html">http://www.rom.on.ca/wwatch/teachers-kit/disappearing..html</a>)
claims that the index of Wesson Oil and of pyrex is 1.474.

Post a reply to this message

Robert Chaffe wrote:

> Well, I don't think the include file at the following site has those specific items,
except quartz maybe, but here's a link I
> know about.
> http://seasoft.tecbox.com/Pov/NewIOR.html

Unfortunately that link is no longer working. Sven did post the file in
povray.text.scene-files back on April 10, 2000 and can be obtained from
there.

-- 
Ken Tyler

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> >I know the IORs of water and glass are 1.33 and 1.5, but there are a number
> >of materials that it would be handy to know the IORs for.
> >
> >Perspex
> >PET (plastic, recycling number 1)
> >Pyrex
> >Quartz glass

Perspex is the same as Plexiglass (i.e. Polymethylmethacrylate) and hence 
on the list posted by Alan Kong.  There should also be a plexiglass 
texture included in one of the libraries with POV.

> I don't know the IOR of pyrex but I _do_ know it is essentially equal to
> that of Wesson Corn Oil.  Really.  Submerge a pyrex lab beaker in a bowl
> full of Wesson, and the beaker disappears.  It's the coolest physics demo I
> do in my class.

Or the same as Glycerol at ~20C
 
Jamie.

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Ken wrote:

> Robert Chaffe wrote:
> 
>> Well, I don't think the include file at the following site has those
>> specific items, except quartz maybe, but here's a link I know about.
>> http://seasoft.tecbox.com/Pov/NewIOR.html
> 
> Unfortunately that link is no longer working. [...]

What do you mean? The link works fine.

-- 
light_source{0#macro L(K,H,W)sphere{H.5}sphere{K.5}sphere{W.5}cylinder{
H,K.5}cylinder{H,W.5}#end 3}union{L(0v*-2<2,-2>)L(y*-3z-v*5z*3-y)L(-y*3
0u*3)L(y*-3v*-5-z,z*-3-y)rotate-v*clock pigment{rgb.5}translate<0,2,9>}
// +KFF200 +KF720 +W120 +H90 -F -A -GA -P

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Felix Wiemann wrote:

> What do you mean? The link works fine.

Another Netscape 4.72 bug surfaces.... The site in question is not
Netscape friendly.

-- 
Ken Tyler

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