JPS63129542A - Optical information recording carrier and its production - Google Patents

Abstract

PURPOSE:To obtain an extremely thin type optical information recording carrier by subjecting a photoresist surface of a laminate of a base material, light absorptive layer and photoresist to pattern exposing and light emitting and converting the information recording thereof according to an emission intensity distribution and reproducing said information record. CONSTITUTION:An illuminating luminous flux from the outside is projected onto the optical information recording carrier formed by forming a luminous body pattern 6 on the light absorptive layer 2 laminated and disposed on the base material 1 and laminating a transparent base material 7 via an adhesive layer 8 on the pattern to apply the energy to the pattern 6 so that the pattern emits light. The information record recorded by concn. distribution of the pattern 6 is converted to the emission intensity distribution to reproduced the above- mentioned information record. The reflected light of the light illuminated to the recording carrier does not directly act as the information reading light according to the above-mentioned constitution and, therefore, the resistance to the inclination of a card, etc., and the misalignment of an optical system, etc., is obtd. Since the recording medium constituting the information recording face is constituted of the concn. distribution of the luminous body which emits light according to the energy of the light projected from the outside, the production of the carrier is easy and inexpensive. The reduction in the thickness and size of the entire part of the information reading out system is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical information recording carrier for optically reproducing information and a method for manufacturing the same.

[Prior Art] In recent years, as society has become more information-oriented, many information recording carriers and optical information recording and reproducing devices that optically record and reproduce information have been proposed as means for efficiently handling a wide variety of information. There is. Binarized information is converted into intensity changes in the information recording carrier by changes in reflectance, changes in reflected light intensity due to surface shape such as the presence or absence of pits, and changes in the plane of polarization due to magneto-optic effects. There are some things that can be detected.

The above-mentioned information recording carrier has excellent features such as high recording density and non-contact recording/reproduction, so it has a long life. Optical disks, optical cards, optical tapes, etc. have been devised as such optical information recording carriers.
Optical reproduction of information on an optical card, which is a card-shaped information recording carrier that is highly portable and has a large capacity compared to its size, will be explained.

FIG. 3 is a schematic diagram showing an optical information reproducing apparatus using the above optical card. In FIG. 3, 9 is an optical card, 10 is a stage on which the optical cart 9 is placed and is movable in the direction A in the figure, 11 is a roller that drives the stage 10, 12 is a light source such as a laser, 13 14 is an illumination optical system, 14 is an imaging optical system, and 15 is a sensor. In the optical information reproducing apparatus shown in FIG. 3, the light emitted from the light source 12 is irradiated onto a line on the information signal train by the illumination optical system 13, and -
The reflected light of part of the information on the column (signal light such as light intensity and polarization) is imaged on the sensor 15 by the imaging optical system 14, and information is detected for each column of the information signal column. It is structured to do so.

This method has the advantage that it is possible to manufacture a device for reproducing information from the optical cart 9 using easily available components, but it also reduces the thickness of the optical head (the portion including reference numerals 12 to 15). It is difficult to make it thin, and since the reflected light from the optical card 9 is used to reproduce information, it also has the disadvantage that if the optical card 9 has a tilt error, the amount of reproduced light will change greatly. was.

[Problems to be Solved by the Invention] In view of the problems of the conventional optical cards mentioned above, an object of the present invention is to provide an ultra-thin optical card that is resistant to tilt errors of the optical card and has a simple structure. An object of the present invention is to provide an optical information recording carrier and a method for manufacturing the same.

[Means for Solving the Problems] That is, the first aspect of the present invention is to form a light emitter pattern on a light absorbing layer of a base material on which a light absorbing layer is laminated, and to bond the light emitter pattern onto the light absorbing layer. A transparent base material is laminated via a layer, and an illumination beam from the outside is irradiated onto the transparent base layer to impart energy to the light emitter pattern to cause it to emit light, and information is recorded by the concentration distribution of the light emitter pattern. The optical information recording carrier is characterized in that the recorded information is reproduced by converting the recorded information into a luminescence intensity distribution.

In addition, the second invention is to stack a light absorption layer on a base material, apply a photoresist on the light absorption layer, and then expose the photoresist to light through an original plate consisting of a fine optical density pattern. A resist pattern is formed by development, a phosphor is coated on the resist pattern, a phosphor pattern is formed on the light absorbing layer by lifting on the resist pattern, and then a transparent phosphor is coated on the phosphor pattern. This is a method for producing an optical information recording carrier, characterized in that base materials are bonded together via an adhesive layer.

Furthermore, specifically, as an information recording carrier that optically reproduces information, an illumination beam from the outside is irradiated onto the information recording carrier onto a base material to impart energy to the light emitter pattern constituting the recording medium. In an optical information recording carrier that reproduces recorded information by emitting light and converting the information recorded with the density distribution of one emitter pattern into a luminous intensity distribution,
A photoresist is applied onto a base material on which a light absorption layer is laminated, then pattern exposure is performed on the photoresist layer through an original plate consisting of a fine optical density pattern, and then the photoresist is developed to form a resist pattern. let me,
A light-emitting material is applied thereon, and then the resist pattern is lifted off to form a pattern made of the light-emitting material on the light-absorbing layer.

[Function] In the optical information recording carrier of the present invention, the light absorption layer forms a light emitter pattern on the light absorption layer of the TiR-treated base material, and attaches the light emitter pattern to the transparent base material via an adhesive layer on the light emitter pattern. Since the information recording surface is laminated, the external illumination light beam irradiated from the transparent base material side onto the information recording surface partially illuminates the information recording recorded with the density distribution of the light emitter pattern constituting the recording medium. The information can be read by emitting light from the information recording surface as a luminous intensity distribution and entering the light onto the optical sensor.

[Example] Hereinafter, the present invention will be described in more detail based on the example shown in the drawings.

FIG. 1 is a sectional view showing an embodiment of an optical information recording carrier according to the present invention. In FIG. 1, the optical information recording carrier of the present invention has a light absorbing layer 2 laminated on a base material l, a light emitter pattern 6 is formed on the light absorbing layer 2, and a light emitter pattern 6 is formed on the light absorber pattern 6. A transparent base material 7 is bonded to and laminated with an adhesive layer 8 interposed therebetween.

Next, a method for manufacturing an optical information recording carrier according to the present invention will be explained. FIGS. 2(a) to 2(e) show process diagrams of a method for manufacturing an optical information recording carrier according to the present invention.

First, as shown in FIG. 2(a), a light absorption layer 2 is placed on the base material l.
Next, as shown in FIG. 2(b), the light absorption layer 2 is laminated.
A photoresist 3 is applied on top of the photoresist 3 to form a photoresist thin film.Next, as shown in FIG. After pattern exposure is performed, a resist pattern 4 is formed on the light absorption layer 2 by development.

Furthermore, as shown in FIG. 2(d), after applying the luminous material 5 on the resist pattern 4, the resist pattern 4 is lifted off as shown in FIG. 2(e), and the luminous material is applied on the light absorption layer 2. A light emitter pattern 6 is formed. Thereafter, by bonding a suitable transparent base material 7 onto the light emitter pattern 6 via the adhesive layer 8, the optical information recording carrier according to the present invention shown in FIG. 1 can be easily manufactured.

In the present invention, the base material l can be any material that can be used as a normal card base material, and specifically, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinylidene chloride, polymethacrylate, etc. Acrylic polymers such as methyl acid, polystyrene, polyvinyl butyral,
Acetyl cellulose, styrene-butadiene copolymer,
Polyethylene, polypropylene, polycarbonate, epoxy, ABS resin, etc. are used. In some cases,
Metal sheets, synthetic paper, paper, etc. can also be used, and furthermore,
Laminated bodies of materials such as those mentioned above can also be used.

The transparent base material 7 is preferably one that is less inconvenient for optical reproduction. For example, acrylic resin, polyester resin, polycarbonate resin, vinyl resin, polysulfone resin, polyimide resin, polyacetal resin, polyolefin resin, polyamide resin, Cars can be made using cellulose derivatives, etc.

These transparent substrates can also be subjected to pretreatment for improving adhesion, such as corona discharge treatment, plasma treatment, UV-ozone treatment, and primer treatment, if necessary.

The light-absorbing layer 2 can be formed on the base material 1 by coating a material obtained by dispersing or kneading a suitable dye or pigment in a resin binder, etc., and can be formed on the base material 1 by coating it with a material that has a low reflectance to reproduced light and is light-absorbing. There is no particular limitation, and printing ink, black pigment, etc. can be used.

The adhesive layer 8 can be obtained by, for example, applying a thermoplastic adhesive, a thermosetting adhesive, a photocuring adhesive, or a combination of photocuring and heat curing type adhesive, or by applying a solid adhesive 9 after partially adhering or covering with a protective film. Further, these adhesives may be known ones and are not particularly limited.

As the light emitter constituting the optical information recording carrier according to the present invention, known fluorescent materials can be used, and as the inorganic fluorescent material, it is preferable to use a phosphorescent material that exhibits less attenuation of light with a long afterglow, for example, Calcium sulfide-based (:aS:Bi, zinc sulfide-based ZuS:Cu, ZuS:Mn, 2nS:Pb
can be mentioned. Examples of organic fluorescent substances include various fluorescent dyes such as thionine, safranin T, acridine yellow, acridine orange, phenosafranine, rhodamine B, perylene-tetracarboxylic acid diimides, and the like.

Such a light emitter can be applied as a binder by being dissolved in a transparent resin or dispersed in a polymeric surfactant.

Regarding lift-off properties, since the pattern 6 of one luminescent material is formed by utilizing the difference in solubility between the resist pattern 4 and the luminescent material 5, the above-mentioned selection of binder and polymeric surfactant is used. The selection can be made depending on the resist. For example, if an aluminum vapor-deposited film patterned using an organic resist is used as the resist pattern 4, an appropriate water-resistant organic binder can be used as the light emitter 5, and the resist pattern 4 is lifted off by acid treatment. things are possible.

Next, FIG. 4 is a schematic configuration diagram showing an optical information reproducing apparatus using an optical card as an example of an optical information recording carrier according to the present invention. Reference numerals 10 to 15 in FIG.
shows the same thing as FIG. 3.

Reference numeral 16 denotes an optical card, in which the light flux from the illumination light source 12 enters the optical card 16, emits a signal light according to the emission intensity distribution in the information recording layer, and is transmitted to the resensor 1 by the imaging optical system 14.
5, and the information is read out.

In this embodiment, since illumination is performed by emitting light from the information recording layer, there is an advantage that the influence of the tilt of the optical card 16 on information reading is small.

Furthermore, since the optical axis of the imaging optical system 14 is set perpendicular to the optical card 16, a lens with an extremely small working distance can be used as the imaging optical system 14, so that it can be easily made compact. Also, as the sensor 15, 2
When using a dimensional sensor array, the optical axis of the imaging optical system 14 must be set perpendicular to the optical card 16 in order to avoid changes in magnification depending on the position on the sensor.

FIG. 5 represents another embodiment of the present invention, and is a schematic configuration diagram showing an optical information reproducing apparatus using an optical card as an example of the optical information recording carrier according to the present invention. In FIG. 5, reference numerals 10 to 15 indicate the same parts as in FIG. 3. 16 is an optical card, and the light beam from the illumination light source 12 is incident on the optical card 16, but unlike in FIG. 4, the light beam illuminates the information recording layer in the imaging optical system 14 to cause it to emit light. It is not designed in a similar way, but is configured to illuminate a different area. That is, this shows a format in which the position illuminated by the illumination light beam and the readout position of the imaging optical system are different.

In FIG. 5, when the optical card 16 moves in the direction of arrow A, the recording section P in FIG. 5 has already been illuminated, has moved, and is currently captured by the reading system. shows. Also, although the recording section Q has already received illumination, it is currently neither illuminated nor captured by the reading system, but as it moves, the recording section Q will be captured by the reading system following the recording section P. .

Furthermore, the recording section R is currently receiving illumination, and as it moves, it is shown that it will be captured by the reading system next to the recording section Q.

In this embodiment, the optical axes of the light source 12 and the sensor 15 are perpendicular to the optical card 16, and the distance between the optical axes is sufficiently small. If the attenuation of the luminous intensity when emitting light can be ignored, optical information recording can also be reproduced. Even in such a configuration, as described above, the recorded information is reproduced by imaging signal light corresponding to the emission intensity distribution on the sensor 15 by the imaging optical system 14 and reading the information. As the device moves in the direction of arrow A, information on points P, Q, and R can be sequentially read out.

[Effects of the Invention] As explained above, by adopting the configuration of the present invention, ■The reflected light of the illumination light on the optical information recording carrier does not directly become the information reading light, so that the tilt of the card and the optical system are prevented. It is possible to create a structure that is resistant to misalignment.

(2) Since the recording medium constituting the information recording surface is constructed based on the concentration distribution of the luminescent material that emits light depending on the energy of externally irradiated light, it is easy to manufacture and inexpensive.

(2) According to the configuration of the present invention, the entire information reading system can be easily made thin and compact.

It can have the following advantages.

Further, according to the present invention, it is possible to construct an ultra-thin optical card information reproducing device.

Furthermore, since reading is performed in a direction perpendicular to the card, it is possible to construct a reading optical system that is resistant to card inclination.

Further, since the recording medium used in the present invention is composed of a light-emitting layer and a pattern layer based on recorded information, it is easy to manufacture and an optical card can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the optical information recording carrier according to the present invention, and FIGS. 2(a) to (e) are steps showing an example of the method for manufacturing the optical information recording carrier according to the present invention. 3 are schematic configuration diagrams showing an optical information reproducing apparatus using a conventional optical card, and FIGS. 4 and 5 are respectively optical information reproducing apparatuses using an optical information recording carrier according to the present invention. FIG. l...Base material 2...Light absorption layer 3...
Photoresist 4...Resist pattern 5...
Luminous body 6... Luminous body pattern 7... Transparent base material 8... Adhesive layer 9.16-... Optical card 10-... Stage 11... Roller
12... Light source 13... Illumination optical system 14
...Imaging optical system 15...Sensor Fig. 1 Fig. 2

Claims (2)

[Claims] (1) A light-emitting pattern is formed on the light-absorbing layer of a base material on which a light-absorbing layer is laminated, and a transparent base material is laminated on the light-emitting pattern via an adhesive layer, and irradiating with an external illumination light flux to impart energy to the light emitter pattern to cause it to emit light, converting the information record recorded in the density distribution of the light emitter pattern into a light emission intensity distribution and reproducing the recorded information. A characteristic optical information recording carrier. (2) A light absorption layer is laminated on a base material, a photoresist is applied on the light absorption layer, the photoresist is exposed to light through an original plate consisting of a fine optical density pattern, and then developed to form a resist pattern. A light emitter is formed on the resist pattern, a light emitter is applied on the resist pattern, a light emitter pattern is formed on the light absorbing layer by lifting off the resist pattern, and a transparent base material is applied as an adhesive layer on the light absorber pattern. 1. A method for producing an optical information recording carrier, which comprises bonding the carrier via a .