Use of an azobenzene in an optical element for use in eyeglasses, visors, masks and screens to reduce the image perception time and improve the contour definition thereof

摘要

An optical element for use in eyeglasses, visors, masks and screens to reduce the image perception time and improve the countour definition of the image comprises a transparent plastic material supporting member into which there is introduced, by suitable processing operations, 4-nitro-2-methyl-4-diethanolamino-azobenzene having the following formula l