Patent ID: 7165850
Filing Date: 2007-01-23
Classification: G01B,G02B

Abstract:
1. A phase-compensating cube corner retroreflector, comprising: an entrance/exit face devoid of any phase-compensating film stack; a first rear reflecting face; a first phase-compensating film stack atop the first rear reflecting face, wherein the first phase-compensating film stack induces 2nπ phase difference in light upon reflection, wherein n is any integer including 0; a second rear reflecting face; a second phase-compensating film stack atop the second rear reflecting face, wherein the second phase-compensating film stack induces 2nπ phase difference in light upon reflection; a third rear reflecting face; a third phase-compensating film stack atop the third rear reflecting face, wherein the third phase-compensating film stack induces the 2nπ phase difference in light upon reflection; wherein light enters and exits the cube corner retroreflector with substantially the same polarization orientation and substantially the same polarization ellipticity.