title: Multiple-index holographic contouring.
abstract: A new multiple index technique is presented for holographically generating contours of constant depth. With this technique it is possible for the first time to use the multiple index method for obtaining high contrast contours denoting small depth changes over large surfaces. The improved multiple index technique is compared with an analogous multiple frequency system. Experimental results obtained with both of these techniques are also presented.
authors.forename: J S
authors.initials: JS
authors.lastname: Zelenka
authors.forename: J R
authors.initials: JR
authors.lastname: Varner