| abstract |
(57) [Problem] To provide an optical element which can reduce fog, has a low optical reflection density at the time of decoloring, and has a higher coloring / decoloring contrast. A cell 2 holding a colored stimulus-responsive polymer gel 10 and a liquid 12 absorbable in the colored stimulus-responsive polymer gel 10 between a pair of substrates 6 and 8; An optical element comprising a microlens 4. Further, the micro lens 4 is provided on one of the substrates 6. In the above, the aspect provided on the side opposite to the side on which the colored stimulus-responsive polymer gel 10 is held is preferable. Further, it is preferable that the shape of the micro lens 4 is a convex lens shape having a concave portion at a substantially central portion. |