Information reading method of waveguide multi-layer light card

Abstract

The invention discloses a reading method for a waveguide multilayer light card, characterized by that it has the steps of: 1) an illuminating laser enters in a to-be-read layer in the light card, and guide wave leaks in the information mark place of the light card to form information light; 2) the information light images on the photosensitive surface of a photoelectric detector CCD and is inputted into a computer, realizing receiving the information light; 3) the computer receives and analyzes CCD collected image and controls a translational platform to drive the light card to move to a focus for focusing; 4) the computer recognizes and converts the received image by image processing method to obtain the data recorded at the focus; 5) making continuous one-by-one readout of information cells and information sections by computer controlled mechanical method; 6) coupling illuminating light beam into the next to-be-read layer and correspondingly moving optical image to make layer selection; 7) repeating the steps 2)-6) until all information stored in the light card is read out.

Description

technical field [0001] The invention relates to optical storage technology, in particular to an information readout technology of a multi-layer optical storage carrier optical card based on waveguide principle. Background technique [0002] Optical card is a special kind of residential storage carrier, which appeared in the mid-1980s and has a history of more than ten years. Its storage technology is very similar to that used for optical discs. With the maturity and promotion of optical disc storage technology, optical card technology is penetrating into various fields of computer applications at an extremely fast speed. Compared with other portable memory cards, the optical card has a large storage capacity. An optical card can store 4-6MB of information, which is tens of thousands of times that of a magnetic card. It can also be used to store geometric figures, such as photos, fingerprints, and X-ray photos. and other information. With the rapid development of informati...

AI Technical Summary

Problems solved by technology

Existing optical cards are all single-layer storage carriers. The readout beam and focusing beam adopt the vertical incidence and reflection methods similar to traditional optical discs. In the case of multi-layer storage, each storage layer will reflect information at the same time. These The information has the same direction and similar intensities, making it difficult to distinguish them, resulting in failure of focusing and readout

Therefore, the existing optical card information readout technology cannot be used for information readout of waveguide multilayer optical cards

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