rugate

comparative more rugate · superlative most rugate

1. Having alternate ridges and depressions; wrinkled.

   Unifacial, superior surface transversely rugate, with minute oririmes at the bottom of the furrows

   c. 1848, James Dwight Dana, Zoophytes

2. Having a varying refractive index.

   Rugate coatings typically consist of a single layer deposited onto a substrate where the refractive index of the layer continuously changes as a function of depth.

   2002, Bruce E. Perilloux, Thin-film Design, page 7

   1 more example

   Researchers have focused on various manufactured periodically nonhomogeneous dielectric materials, including rugate filters and periodically multilayered materials.

   2013, John Polo, Tom Mackay, Akhlesh Lakhtakia, Electromagnetic Surface Waves: A Modern Perspective, page 193