Etalons with dispersive coatings

Details Etalons with dispersive coatings Etalons with dispersive coatings

G - Physics

01

J

G01J 3/45 (2006.01) B05D 5/06 (2006.01) G01J 3/26 (2006.01) G02B 5/28 (2006.01)

Patent

CA 2092102

23 PATENT PD-D91039 ETALANS WITH DISPERSIVE COATINGS ABSTRACT OF THE DISCLOSURE 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.

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