Patent ID: 8893978

Claim:
A surface identification system comprising: at least one identification code pattern comprising a plurality of through holes, recesses, or projections, or any combination thereof, formed on a code area of a first surface, the identification code pattern being made to correspond to the first surface or a second surface; and a code reading apparatus for reading the identification code pattern, the code reading apparatus being capable of irradiating light rays towards the code area, receiving reflected light rays reflected from the code area to read out the identification code pattern according to modulation to an electrical signal of the reflected light rays from each of the plurality of through holes, recesses, or projections, or any combination thereof, and indicating a correspondence between the identification code pattern and the first surface or the second surface; wherein the modulation is caused by a combined effect of a reflective distance between the code reading apparatus and each of the plurality of through holes, recesses, or projections, or any combination thereof, and surface properties of each of the plurality of through holes, recesses, or projections, or any combination thereof.