Rugate filter having suppressed harmonics

Details Rugate filter having suppressed harmonics Rugate filter having suppressed harmonics

G - Physics

02

B

G02B 5/28 (2006.01)

Patent

CA 2122932

A rugate filter (10) having suppressed harmonics includes a layer (18) of material disposed on a surface (14) of an optical substrate (12) having an index of refraction versus thickness profile that is the superposition of a principle sinusoid and a secondary sinusoid. The secondary sinusoid being superimposed about -90 degrees out of phase with the principle sinusoid.

L'invention est un filtre rugueux (10) à harmoniques supprimées comportant une couche (18) d'un matériau placé sur la surface (14) d'un substrat optique (12) dont l'indice de réfraction en fonction de l'épaisseur est la superposition d'une sinusoïde principale et d'une sinusoïde secondaire avec un déphasage de 90 degrés environ entre ces deux sinusoïdes.

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