High-speed automatic focusing system

G - Physics – 03 – B

Patent

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Details

G03B 13/00 (2006.01)

Patent

CA 2574736

An automatic focusing system comprises at least one micromirror array lens, an image sensor, and a signal processor. The micromirror array lens images an object and focuses the image on the image sensor. The image sensor receives the light and converts the photo energy of the light to electrical energy in the form of an electrical signal. The image sensor sends the electrical signal, which carries image data concerning the object, to the signal processor. The signal processor receives the electrical signal, compares the image quality of the image data to its focus criteria, and generates a control signal, which it sends to the micromirror array lens to adjust the focal length of the micromirror array lens. This interative process is continued until the quality of the image data meets the focus criteria, and the process is completed within the afterimage speed of the human eye.

L'invention concerne un système de mise au point automatique qui comprend au moins une lentille à réseau de micromiroirs, un capteur d'images, et un processeur de signaux. La lentille assure l'imagerie d'un objet et met au point l'image sur le capteur, lequel reçoit la lumière et convertit la photoénergie sous la forme d'un signal électrique. Le capteur transmet le signal électrique, porteur des données d'image pour l'objet, au processeur de signaux, lequel reçoit le signal électrique, compare la qualité de l'image des données d'image à ses critères de mise au point et produit un signal de contrôle, transmis à la lentille pour le réglage de la longueur focale de la lentille. Ce processus interactif se poursuit jusqu'à ce que la qualité des données d'image réponde aux critères de mise au point, et le processus est exécuté sans dépasser le temps qui correspond à la vitesse de l'oeil humain relative à l'image rémanente.

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