JSAP Spring / Autumn Meeting

In recent years, “inken” technology attracts much attention. The inken means “appearance and disappearance”. Hidden images are visualized by view point, illuminant or analog activities . This technology is not only applied for hiding an image: it has pleasure when you “see the image”. So, it is applied not only for security field, but also for education, entertainment or art field. We produced educational tools using full-wave plates changed by an angle to observe. So, we will report it.