| 摘要 |
23 PATENT PD-D91039 ETALANS WITH DISPERSIVE COATINGS An etalon (10) is provided with a coating (12) so as to selectively pass spectral lines of interest. The etalon includes a substrate (14) having a first major surface and a second, opposite major surface. The etalon further includes a coating, preferably rugate coating (12), formed upon at least one of the major surfaces. The rugate coating has spatially varying index of refraction profile through a depth thereof. The profile is selected so as to provide the element with a prescribed dispersion characteristic that matches a dispersion characteristic of a source of the radiation signal.
|
