A DEVICE TO ADJUST LIGHT-TRANSMITTANCE

摘要

A device to adjust light-transmittance (10) which is capable of adjusting the blockage of light includes a first polarizer (14), a second polarizer (22) having the axis of polarization perpendicular to the polarization axis of the first polarizer and which are arranged with a space between them, a light-transmitting element containing a polymer oriented in a direction different from the polarization axes of the first polarizer and second polarizer, a means to move the light-transmitting element in such a manner that the light-transmitting element can be placed between the first polarizer and second polarizer, or the light-transmitting element can be placed on the side opposite the first polarizer from the second polarizer.