Patent ID: 8334499

Claim:
An optical angle of arrival measurement system, comprising: a focal plane array (FPA) comprising an M row×N column array of pixels, said rows and said columns being parallel to a row axis and a column axis, respectively; and one or more optical elements, one of which is a diffractive optical element (DOE), arranged to converge incoming light from one or more point sources onto said FPA in a predetermined pattern of lines which are oblique with respect to the row and column axes of said FPA, such that the position of said lines on said FPA varies with the angular position of said point source(s) relative to said measurement system; wherein said predetermined pattern of lines comprises two perpendicular narrow width lines that form a cross-pattern, each of said lines being oblique with respect to said row and column axes and traversing at least two of said rows or columns along their respective lengths.