| 摘要 |
<p>An electro-optical device having variable light transmission and including: at least one lens consisting of an electro-optical cell (4) with a first plate (6) and a second plate (8) each having a control electrode (14, 16), and a sealing frame placed between said plates to form a sealed space enclosing an electro-optical material (12); and a voltage generator (18) connected to the electrodes in order to apply a variable voltage to the material and thereby automatically or manually alter the light transmissivity of the cell (4) according to the existing light. Said cell (4) includes at least one element (6) loaded with a photochromic substance of which the absorbency changes reversibly according to the existing light strength. The device is used particularly in eye protection devices.</p> |
