Optical element, optical element device and optical element control system

A transmission-type optical element having transmissivity in a first direction, the optical element comprising:

• a transparent substrate having a first plane and a second plane, which is opposite to the first plane;
• a plurality of information forming units on the first plane of the substrate, each having a first surface that forms an element of first information formed by the plurality of information forming units;
• and
• the first surface facing a second direction orthogonal to the first direction, wherein the optical element simultaneously provides an external information visible through the optical element and the first information, wherein each of the plurality of information forming units has a second surface that forms an element of second information formed by the plurality of information forming units, the second surface facing a third direction that is orthogonal to the first direction and different from the second direction and wherein each of the plurality of information forming units has a third surface that forms an element of third information formed by the plurality of information forming units, the third surface facing a fourth direction that is orthogonal to the first direction and different from the second direction.