Theoretical study of graded-index coatings prepared by glancing angle deposition

Relationship between refractive index and packing density of coatings prepared by glancing angle deposition is analyzed and three expressions are given firstly. And then optical characteristics of the graded-index coating, which is deposited as the linear changing of packing density, are discussed from some aspects as positive or negative change, integral periods or have hale period, different periods etc, and more over, the influences of different refractive-index theories on the optical characteristics are compared. Finally, the preparation method, applications and some problem in preparation of the graded coating are discussed separately. (author)