Information reading/processing system for recorded information using fluophor

• US 4,757,188 A
• Filed: 12/05/1985
• Issued: 07/12/1988
• Est. Priority Date: 05/26/1982
• Status: Expired due to Fees

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Tokitsu, Naoki, Nakarai, Masazumi
• Primary Examiner(s): Pitts, Harold I.
• Application Number:
  US06/804,340
• Time in Patent Office: 950 Days
• Field of Search: 235/454, 235/482, 235/491, 235/462, 235/468, 235/487
• US Class Current: 235/454
• CPC Class Codes: G06K 19/06009 with optically detectable marking G06K19/063, G06K19/08 take precedence
• CPC Class Codes: G06K 2019/06225 using wavelength selection, e.g. colour code
• CPC Class Codes: G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence

Abstract

A first member and a second member are coupled so as to form a flat card path therebetween. The card path is open at one end of each of the first and second members. A plurality of guide holes are formed in the first member so as to open to the card path. The guide holes are substantially perpendicular to the card path. A plurality of light-emitting elements are respectively mounted in the guide holes such that a light-emitting direction of each light-emitting element crosses the card path. A plurality of photodetector chambers are formed in the second member such that each photodetector has an optical axis aligned with that of each light-emitting element. A plurality of light-receiving elements are housed in the photodetector chambers so as to receive only light beams having a predetermined wavelength through respective filters. An information card having pattern data formed by a fluophor thereon is inserted along the card path, thereby allowing reading of the pattern data by the light-receiving elements.

Claims

1. An information card in which data is recorded, comprising:

rectangular base paper means made of a material which is adapted to transmit at least one infrared component of fluorescent light rays, this base paper means having two opposite, longer side edges, two opposite, shorter end edges, and two opposite faces;

information recording track means disposed on one face of said base paper mean such that said track means is parallel to one said edge of said base paper means, said track means including an information pattern formed of fluorescent strips, said information pattern being constituted at least in part by a code pattern of fluorescent strips in said track means, said fluorescent strips being adapted to be excited upon reception of infrared light rays of a first predetermined wavelength, and in response to such reception to emit infrared light rays having second predetermined wavelength which rays of said second predetermined wavelength are capable of passing through said base paper means so that said rays of said second wavelength may be sensed from an opposite face of said paper means; and

reinforcing sheet means including a film which is secured on each face of said base paper means in covering relation thereto, this film being one which is adapted to transmit infrared light rays therethrough;

said base paper means being substantially the same in color within the humanly-visible spectrum as said information pattern.

2. An information card according to claim 1, wherein:

said track means includes first and second tracks which are parallel to said side edges of said rectangular base paper means, said first track having a synchronous-signal pattern of fluorescent strips arranged at predetermined intervals, and said second track having a binary-data pattern formed of fluorescent strips arranged in a predetermined relationship with the fluorescent strips of said synchronous-signal pattern.

3. An information card according to claim 1, wherein:

said information pattern is constituted at least in part by fluorescent printing disposed on said base paper means.

4. An information card according to claim 1, wherein:

said track means includes first, second and third tracks which are parallel to said side edge of said rectangular base paper means;

said second track is located between said first and said third tracks;

a synchronous signal having a periodic signal pattern is recorded in said second track; and

binary data is recorded in each of said first and third tracks such that the binary data is recorded at positions corresponding to the signal pattern of said synchronous signal.

5. An information card according to claim 4, wherein:

the data recorded in each of said first and second tracks is in the form of a fluorescent strip pattern; and

the synchronous signal recorded in said second track is in the form of an array of apertures provided in said base paper means to permit light rays to pass therethrough.

6. An information card according to claim 5, wherein:

the data recorded in said first and third tracks are each in the form of a fluorescent strip pattern different from one another.

7. An information card according to claim 5, wherein:

the data recorded in said first and third tracks are each in the form of a fluorescent strip pattern representing the same information but relatively reversed in sequence.

8. An information card according to claim 1, wherein:

said base paper means comprises first and second layers of base paper, and said information pattern is formed between said first and second layers of base paper such that a fluorescent layer is sandwiched between said first and second layers of base paper.

9. An information card according to claim 1, further comprising:

a card-shaped reinforcing member having an opening; and

said base paper means being fitted into said opening of said card-shaped reinforcing member such that said reinforcing sheet means is also covers said reinforcing member.

10. An information card according to claim 9, wherein:

said reinforcing member is constituted at least in part by an elastic plate made of metal.

11. An information card according to claim 9, wherein:

said reinforcing member is constituted at least in part by an elastic plate made of synthetic resin.

12. An information card in which data is recorded, comprising:

rectangular base paper means made of a material which is adapted to transmit at least one infrared component of fluorescent light rays, this base paper means having two opposite, longer side edges, two opposite, shorter end edges, and two oppoite faces;

information recording track means disposed on one face of said base paper means such that said track means is parallel to one said edge of said base paper means, said track means including an information pattern formed of fluorescent strips, said information pattern being constituted at least in part by a code pattern of fluorescent strips in said track means, said fluorescent strips being adapted to be excited upon reception of infrared light rays of a first predetermined wavelength, and in response to such reception to emit infrared light rays having second predetermined wavelength which rays of said second predetermined wavelength are capable of passing through said base paper means so that said rays of said second wavelength may be sensed from an opposite face of said paper means; and

reinforcing sheet means including a film which is secured on each face of said base paper means in covering relation thereto, this film being one which is adapted to transmit infrared light rays therethrough;

said track means further comprising non-fluorescent strips interspersed with said fluorescent strips in said track means and being substantially the same in light transmittance within the humanly-visible spectrum, so that data recorded by means of said fluorescent strips are difficult to detect by naked eye.

13. An information card according to claim 12, wherein:

the material for forming said auxiliary pattern produces light having a color similar to that of a fluorescent material.