Card which can be authenticated by hologram chip
View Patent ↗A card authentication is performed. An authentication chip for performing authentication by a copy-disabled hologram chip is attached to a card and when or after the card is introduced into a handling device, the authentication chip information is read to perform authentication. Read may be performed in a planar shape but a linear shape can reduce the processing load. An arbitrary straight line or a curved line may be used as a read line shape by modifying the read position in association with the card movement when the card is placed to be read. When the card introduced to a terminal device is an unauthorized one, the card is ejected or an alarm is issued when the card is introduced inside.
1. An embossed hologram chip reading device for reading an embossed hologram composed of pits with depth of ¼ wavelength of the incident light and a portion without the pit on an authentication verifying chip mounted on a card, wherein said reading device has a reflecting paraboloid mirror in a cylindrical shape, a polygonal mirror and an incident light emitting/detecting element, a rotation axis of said polygonal mirror being disposed at the focal point of said reflecting mirror and the incident light emitting/detecting element being disposed behind said reflecting mirror.
2. The embossed hologram chip reading device according to claim 1 , wherein said paraboloid is a full-paraboloid, a light transmission hole is disposed at the center of said reflecting mirror and said incident light emitting/detecting element is disposed behind said reflecting mirror.
3. The embossed hologram chip reading device according to claim 1 , wherein said paraboloid is a half-paraboloid.
4. The embossed hologram chip reading device according to claim 1 , wherein said paraboloid is a paraboloid smaller than a half-paraboloid, and said polygonal mirror is disposed in an offset arrangement.