Re: Asymmetrical Newton's Cradle

[Bernard Cleyet <anngeorg@PACBELL.NET>]

great idea!

GRIN lenses are more powerful for the same size.


The current method is multilayer.  A rather informative pdf is available
from the below:

www.essilor.com.sg/Library/oof_coatings.pdf


<http://www.google.com/search?hl=en&lr=&ie=UTF-8&q=related:www.zhdanov.ru/classified-catalogue/b-companies/>


bc



Ludwik Kowalski wrote:

> On Saturday, Nov 8, 2003, Brian Whatcott wrote:
>
>
>
> > One next remembers that there is an alternative to a
> > quarter wave length of transmission line. This is a
> > device of specific length and impedance intermediate
> > between two line sections to be joined  of greatly
> > different characteristic impedances.
> >
> > One can instead,  intersperse a length of gradually
> > changing impedance, which matches the preceding
> > and succeeding sections exactly. This has the great
> > advantage of being broad band, so that one is not
> > limited to a frequency where a quarter wave has a
> > fixed length.
>
> Has this kind of approach been used to make a
> "broad band" antireflection coating on a lens?