Variable spectral resolution agile filter

G - Physics – 02 – F

Patent

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G02F 1/19 (2006.01) G01J 3/10 (2006.01) G01J 3/26 (2006.01) G01J 3/42 (2006.01) G02F 1/01 (2006.01) G02F 1/21 (2006.01)

Patent

CA 2175919

A variable spectral resolution agile filter has instantly adjustable spectral resolution with no required mechanical motion and a quickly adjustable center wavelength. Adjustment of the center wavelength is accomplished by reliable piezoelectric actuators (3, 4). Adjustment of the spectral resolution is achieved by changing the finesse of the system, the finesse being governed by the reflectivity of the faces (8, 10). By making one of the faces exhibit electrically variable reflectivity, the finesse of the system is instantly changeable, and thus the spectral resolution is also instantly changeable.

Un filtre agile à résolution spectrale variable présente une résolution spectrale instantanément réglable sans nécessiter de déplacement mécanique, ainsi qu'une longueur d'onde centrale rapidement réglable. Le réglage de la longueur d'onde centrale est effectué par des actionneurs piézo-électriques fiables (3, 4). Le réglage de la résolution spectrale s'effectue par la modification de la finesse du système, cette finesse étant régie par le pouvoir réfléchissant des faces (8, 10). En conférant à l'une des faces un pouvoir réfléchissant électriquement variable, on peut modifier instantanément la finesse du système, et, de ce fait, sa résolution spectrale.

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