A metal card includes: a frame metal body formed of a metal plate having a card-sized shape and thickness, the frame metal body including a first insertion space on an upper surface, a second insertion space on a lower surface, and a first chip insertion hole; a glass body formed of a sheet made of glass material and inserted into the first insertion space; a 3D pattern printed layer comprising a printed layer, a UV 3D pattern layer, a deposition layer formed of multiple layers, and a light-blocking printed layer, the 3D pattern printed layer being disposed between the glass body and the frame metal body; a rear metal body formed of a metal sheet and inserted into the second insertion space; an antenna module mounted in an antenna insertion space of the rear metal body; and an IC module for a card.

An optical device includes an array of lenses and a plurality of segments disposed under the array of lenses. The plurality of segments corresponds to a plurality of images. Upon tilting the device at different viewing angle, the array of lenses presents images sequentially. In some examples, individual ones of the segments can comprise specular reflecting, transparent, diffusely reflecting, and/or diffusely transmissive features. In some examples, individual ones of the segments can comprise transparent and non-transparent regions. The images can produce one or more optical effects.