Method and apparatus for imaging using polarimetry and...

G - Physics – 01 – B

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G01B 11/00 (2006.01) G01J 4/00 (2006.01) G01S 17/89 (2006.01)

Patent

CA 2407918

The present invention provides a method and apparatus for improving the signal to noise ratio, the contrast and the resolution in images recorded using an optical imaging system which produces a spatially resolved image. The method is based on the incorporation of a polarimeter into the setup and polarization calculations to produce better images. After calculating the spatially resolved Mueller matrix of a sample, images for incident light with different states of polarization were reconstructed. In a shorter method, only a polarization generator is used and the first row of the Mueller matrix is calculated. In each method, both the best and the worst images were computed. In both microscope and ophthalmoscope modes, the best images are better than any of the original images recorded. In contrast, the worst images are poorer. This technique is useful in different fields such as confocal microscopy and retinal imaging.

Méthode et appareil permettant d'améliorer le rapport signal-bruit, le contraste et la résolution des images enregistrées au moyen d'un système d'imagerie optique produisant des images spatiales. Le système utilise un polarimètre et effectue des calculs de polarisation afin de produire de meilleures images. Après avoir calculé la matrice de Mueller spatiale pour un échantillon, le système reconstruit les images pour la lumière incidente avec différents états de polarisation. Selon une méthode plus rapide, seul le générateur de polarisation est utilisé et seul le contenu du premier rang de la matrice est calculé. Dans chaque méthode, la meilleure image et la pire image sont traitées. En mode microscope comme en mode ophtalmoscope, les meilleures images sont supérieures aux images initiales. Par contre, les pires images sont moins bonnes. Cette technique est utile dans plusieurs disciplines, comme la microscopie confocale et l'imagerie rétinienne.

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