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.

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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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In article <web.3d44b783314cfd0118ccf4f70@news.povray.org>,
 "Rohan Bernett" <rox### [at] yahoocom> 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.

Look in consts.inc. Perspex is plexiglass, at 1.5. Polyethylene isn't in 
there, I'd guess at around 1.2. Pyrex isn't in there either, but I'd 
guess at somewhere from 1.5-1.6. Quartz glass is there, at 1.458.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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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
>


Try
http://matweb.com
I have found it useful for general material specs.
Below is what I found for quartz.
Fused Quartz = 1.46
Fused Quartz Lamp tubing = 1.458
Alpha Quartz  1.544, 1.553

There is a Beta  Quartz but it looks like God released that version
prematurely as it doesn't have usefull optical qualities :).
Tony

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"Tony LaVigne" <ton### [at] xenomechanicscom> wrote in
news:web.3d46ed6085bddebcc7e287770@news.povray.org 

> There is a Beta  Quartz but it looks like God released that version
> prematurely as it doesn't have usefull optical qualities :).

how about a... bug report ;) ?

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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