| 摘要 |
A system for protecting the eyes of a wearer while permitting information to be conveyed to such eyes includes a first plane polarizer for selectively passing incident light or other electromagnetic energy toward such eyes as a function of a prescribed characteristic, such as polarization direction of such electromagnetic energy, a second plane polarizer for selectively passing incident light (electromagnetic energy) passed by the first polarizer toward such eyes as a function of a prescribed characteristic, such as polarization direction, of such electromagnetic energy, a means for changing such characteristic (i.e., polarization direction), as by rotation using birefringence or wave guiding, of such incident electromagnetic energy in response to a function (such as the intensity of the incident light) to effect a cooperation between the first and second polarizers to change a characteristic (reduce intensity or block light transmission) of such electromagnetic energy received by such eyes, and a heads up display for forming an image between the first and second polarizers to convey information to such eyes of such wearer independently of the operative mode of said changing means.
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