Polarization light modulator

G - Physics – 02 – B

Patent

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G02B 26/06 (2006.01)

Patent

CA 2634406

Polarization light modulators are based on an interferometric design in which a polarizing beam splitter serves as a polarizer and analyzer. A polarization displacement device shifts orthogonally polarized light beams parallel to the long axis of their elongated cross sections. Phase shifts are imparted to the orthogonally polarized beams by linear array MEMS optical phase shift devices. The output of the light modulator is a line image which may be scanned to form a two-dimensional image. Features to improve brightness, contrast and overall compactness of design are disclosed.

Les modulateurs optiques à polarisation sont fondés sur une conception interférométrique dans laquelle un séparateur de faisceau polarisant est utilisé en tant que polariseur et analyseur. Un dispositif de déplacement de polarisation décale les faisceaux de lumière à polarisation orthogonale parallèlement au long axe de leurs sections transversales allongées. Des déphasages sont appliqués aux faisceaux à polarisation orthogonale par des dispositifs de déphasage optique MEMS à réseaux linéaires. La sortie du modulateur optique consiste en une image au trait qui peut être balayée de manière à former une image en deux dimensions. Cette invention concerne également des caractéristiques permettant d'améliorer la luminance, le contraste et la compacité globale de la conception.

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