Re: the right terms

From: Alpha Omega (name_at_address)
Date: 11/21/04 

Date: Sat, 20 Nov 2004 23:20:48 -0500

An earlier version of more or less the same thing is "kinoform".

Kinoforms had a stepwise structure.
I am not sure that there was a discreetization of the dimensions (steps or
radii).

Kinoforms were pioneered in the early 70's at IBM in the (then) context of
holography.

Google should give more details.

The kinoforms structures I remember were simple, i.e. Fresnel type lenses
and the like.

"Bob Knowlden" <nkbob@comcast.net> wrote

> "Binary optics" was a term used to describe stepped structures where N
> etching processes produced 2^N steps.
>
> The principal author's name that comes to mind in that subject is Gary
> Swanson.

> "mg" <nospam@nono.com> wrote
> > microlenses can be fabricagted in multiple layers by deposition or
> > etching, creating a stepwise structure instead of a smooth sphere or
> > asphere. what are the terms to use in a google search to read about
such
> > lenses?