| 摘要 |
A light attenuating device (1), in particular for producing transparent variable-transparency elements (2), wherein a first and a second polarizing element (3, 4) have respective first (6a, 6b) and second (7a, 7b) polarization portions having different polarization planes; and differently oriented portions (i.e. having different polarization planes) of the two polarizing elements (3, 4) are superimposed by varying the relative position of the polarizing elements (3, 4): if similarly oriented portions are superimposed, light is allowed to pass through the device (1); whereas, if differently oriented portions are superimposed, the light is attenuated and/or cut off.
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