CN1705960A - Optical memory medium and optical memory medium reproducing device - Google Patents

Abstract

An optical memory medium includes at least one multi-layered waveguide hologram ROM that uses diffracted light based on incident light to a multi-layered waveguide hologram to read out data, and at least one memory that is integrally constituted with the multi-layered waveguide hologram ROM and is used to read and write data. A reproduction apparatus for the optical memory medium includes a light inputting unit for inputting light into the multi-layered waveguide hologram of the optical memory medium, a light receiving element for receiving light diffracted by the multi-layered waveguide hologram from the light input by the light inputting unit and for converting into an electric signal, and a data record reproduction unit for reading and writing data with respect to the memory of the optical memory medium.

Description

Optical storage medium and optical storage medium playback device

priority claim

This application claims the priority of Japanese Patent Application No. 2003-325995 filed in Japan on September 18, 2003 and Japanese Patent Application No. 2004-129871 filed in Japan on April 26, 2004, and the contents thereof are incorporated herein.

technical field

The present invention relates to an optical storage medium provided with a hologram ROM storing content and a memory capable of rewriting data and its playback device.

Background technique

The technology of forming tiny bumps in the single-mode planar waveguide, diffracting the guided wave light through the tiny bumps, and extracting an arbitrary wave surface out of the waveguide is called waveguide hologram technology. The collection is called a waveguide hologram. If hologram technology is divided into volume hologram technology and thin film hologram technology, waveguide hologram technology belongs to thin film hologram technology. In addition, the laminated waveguide hologram technology that stacks waveguides with built-in waveguide holograms belongs to thin film hologram technology, and can use a three-dimensional area as a recording area, so it can be used as a large-capacity optical memory. For example, refer to JP-A-11-345419.

However, currently, using the laminated waveguide hologram technology, only a playback-only memory is practical, and the user cannot record according to the situation, so there is a disadvantage that the application is limited. In order to eliminate this shortcoming, some people have also proposed a solution combined with an IC chip. For example, refer to JP-A-2003-141475. But not yet practical.

On the other hand, semiconductor memories such as freely rewritable flash memory (flash memory) are expensive, so their main use is temporary storage without swapping the memory itself, and it is not suitable for large-capacity information distribution or archiving purposes.

In view of the above, there is a need for an optical storage medium and its reproducing device, which can read large-capacity public data and record it for exclusive use at low cost, and at the same time, the user can freely record and reproduce information to be rewritten.

disclosure of invention

The present invention is an optical storage medium and its reproducing apparatus conceived to satisfy the above-mentioned needs.

The first feature of the optical storage medium of the present invention is that it is provided with: at least one laminated waveguide hologram ROM for reading data by using diffracted light corresponding to the incident light on the laminated waveguide hologram, and the laminated waveguide hologram ROM is integrated. Constituted at least one memory for data reading and writing.

The second feature of the optical storage medium of the present invention is that it is provided with a rail portion for fixing the laminated waveguide hologram ROM, and has a structure in which the laminated waveguide hologram ROM can be freely inserted and removed.

The third feature of the optical storage medium of the present invention is that the read-write memory is an IC memory, the IC memory terminal is arranged at a predetermined edge of the optical storage medium, and the IC memory terminal is arranged on the edge portion of the optical storage medium. An incident portion of the reference light for the laminated waveguide hologram ROM is arranged on the other edge portion adjacent to the edge portion of the laminated waveguide hologram.

The fourth feature of the optical storage medium of the present invention is that its external dimensions are 32 mm x 24 mm x 2.1 mm, or all sides or any side are small in size.

A first feature of the optical storage medium reproducing device for reading data recorded on an optical storage medium according to the present invention is that the optical storage medium is provided with at least one device for reading data using diffracted light corresponding to incident light to the laminated waveguide hologram. A laminated waveguide hologram ROM, and at least one memory for reading and writing data integrally formed with the laminated waveguide hologram ROM, the optical storage medium reproducing device is provided with: make light incident on the laminated waveguide hologram The light incident part in the figure is a light receiving part that receives light incident on the light incident part and is diffracted by the laminated waveguide hologram, and converts it into an electrical signal, and a data record for reading and writing data to the read-write memory Reproduce parts.

The second feature of the optical storage medium reproducing device of the present invention is that it is further equipped with: judging whether the inserted medium is the optical storage medium according to whether the light receiving part detects the diffracted light emitted from the laminated waveguide hologram ROM. Judgment part.

A brief description of the drawings

Fig. 1 is a perspective view showing the structure of an optical storage medium according to Embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view showing an example of the structure of a laminated waveguide hologram ROM.

Fig. 3 is a cross-sectional view showing another example of the structure of a laminated waveguide hologram ROM.

Fig. 4 is a perspective view showing the structure of an optical storage medium according to Embodiment 2 of the present invention.

5A and 5B are perspective views showing the structure of an optical storage medium according to Embodiment 3 of the present invention.

Fig. 6 is a perspective view showing the structure of an optical storage medium reproducing apparatus according to Embodiment 4 of the present invention.

Fig. 7 is a perspective view showing the structure of an optical storage medium reproducing apparatus according to Embodiment 5 of the present invention.

8A to 8C are perspective views showing the structure of an optical storage medium reproducing apparatus according to Embodiment 6 of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view showing the structure of an optical storage medium according to Embodiment 1 of the present invention. In this figure, 2-1 is an optical storage medium having an external dimension of 32mm×24mm×2.1mm, which is a pentagon with one corner cut chamfered, and the insertion direction of the medium is determined as 2-2 based on the chamfered portion. In this optical storage medium, an IC (flash) memory is provided at the front part 2-5, and a laminated waveguide hologram ROM2-7 is provided at the rear part, with the medium insertion direction 2-2 as the front and back reference. The hologram ROM2-7 is replaceable and fixed by rails 2-6.

On the optical storage medium 2-1, the connection terminal connected with the IC memory in the IC memory part 2-5 is arranged on the end face or the following of one side of the medium insertion direction 2-2 side of the optical storage medium 2-1, so as to be compatible with the insertion The electrode terminals of the optical storage medium reproduction device of the optical storage medium 2-1 are in contact. In addition, the light incident portion of the hologram ROM 2 - 7 is arranged on the side adjacent to the side on which the connection terminals of the IC memory are arranged.

The light used to reproduce the information recorded in the hologram ROM2-7, for example, as shown in Figure 1, when the light incident part is arranged on the left side toward the medium insertion direction 2-2, the light incident part is from the direction of 2-3. incident. In this case, an optically transparent member or hole through which light can pass is provided on the side where the light incident portion is arranged. The light incident from the light incident portion propagates through the waveguide in the hologram ROM 2-7, and is diffracted by the hologram pattern provided in the waveguide.

At this time, the light transmitted in the waveguide is diffracted on the upper and lower sides of the direction perpendicular to the plane of 32 mm × 24 mm, but on the face that is in contact with the opposite side of the diffracted light side of the hologram ROM2-7 of the optical storage medium main body A light absorber is provided, and the light diffracted in this direction is converted into heat. Therefore, finally, only the light diffracted in the 2-4 direction perpendicular to the 32mm×24mm surface is taken out as signal light and imaged as a reproduced image on the two-dimensional light-receiving element provided in the optical storage medium reproduction device.

In addition, the surface and its lower part connected with the hologram ROM2-7 of the optical storage medium body can be made transparent so that the diffracted light is transmitted to the outside of the optical storage medium, and an optical absorber is set at the optical storage medium reproducing device to absorb and The light diffracted in the opposite direction of the 2-4 direction is used to replace the light diffracted in the opposite direction of the 2-4 direction by arranging an optical absorber on the optical storage medium body.

A groove with a width slightly larger than the thickness of the hologram ROM 2-7 is provided at the part where the inner side of the guide rail part 2-6 (the hologram ROM side) is in contact with the side surface of the hologram ROM 2-7, and the hologram ROM is along the groove. Inserted in the same direction as the medium insertion direction 2-2 to be installed. For one inserted hologram ROM 2-7, one is provided inside each of the guide rails 2-6 on the left and right sides, and two grooves are provided as a set.

When the hologram ROM2-7 is installed on the optical storage medium 2-1, the length of the groove of the guide rail part 2-6 can be set to be equal to or slightly longer than the length of the insertion direction of the hologram ROM2-7, so that the optical storage medium can be reproduced. The initial incident position of the laser light in the device is fixed to substantially coincide with the position of the light incident portion of the hologram ROM2-7. In such a fixed state, a slight misalignment occurs between the initial incident position of the laser light in the optical storage medium reproducing device and the light incident part position of the hologram ROM2-7. An adjuster for moving the laser incident position is provided to correct the laser incident position.

In addition, a notch can be provided in the surface in contact with the groove of the guide rail part 2-6 of the hologram ROM2-7, and a protrusion with a spring can be provided in the groove of the guide rail part 2-6. The protrusion fits into the recess of the hologram ROM2-7, and fixes the hologram ROM2-7 at the position where the laser light is incident best.

When there is only one hologram ROM 2-7 inserted into the main body of the optical storage medium 2-1, only one set of grooves in the rail portion 2-6 is provided. On the other hand, there are several hologram ROMs inserted into the main body of the optical storage medium 2-1. The number of blocks of the inserted hologram ROM corresponds to the number of groups.

FIG. 2 is an example of the structure of a laminated waveguide hologram ROM, and a diagram illustrating how light is incident and emitted. As shown in FIG. 2, the hologram ROM becomes a periodic layer such as "cladding layer 11-1/core layer 12-1/cladding layer 11-2/core layer 12-2/.../cladding layer 11-n" structure. In any "cladding/core/cladding" unit, it becomes a planar single-mode waveguide for the wavelength of the laser 13 used. The planar optical waveguide is a so-called planar optical waveguide in which a plate-like transparent medium such as quartz or plastic is used as a core layer sandwiched by a medium with a lower refractive index than the core layer. It can confine light in the core layer. Transmitting in the in-plane direction, it can be used in optical communication devices. The hologram ROM is a memory in which multiple layers of planar waveguides are stacked and each waveguide layer is provided with a hologram.

Here, symbol 14 represents a convex lens, which may be a cylindrical (cylindrical) lens. The end face of the planar waveguide formed by stacking hologram ROMs is perpendicular to the plane of the waveguide. Laser light 13 is incident on the hologram ROM from the transverse direction parallel to the waveguide plane via the convex lens 14 . The incident laser light 13 is focused on a predetermined core layer 18 by adjusting the position of the convex lens 14 .

In addition, in order to transmit the laser light 13, the numerical aperture (NA: Numerical Aperture) of the convex lens 14 must be equal to or smaller than the NA of the waveguide. On the other hand, when the NA is reduced, the spot size of the lens becomes larger. In the case of a single-mode waveguide, when light is directly coupled from the air to the waveguide, the spot size usually exceeds the width of the waveguide, and the coupling efficiency cannot reach 100%.

Also, the NA(NA _L ) of the lens is defined as:

NA _L =D/(f ² +D ² ) ^1/2 ,

On the other hand, the NA(NA _WG ) of the waveguide can be defined as:

NA _WG =(na ² −nc ² ) ^1/2 .

As shown in FIG. 2 , the light guided into the waveguide from the incident point (coupling portion of the waveguide light) 18 becomes the waveguide light 16 fanned around the incident point 18 and most travels through the core layer in the waveguide. Here, the fan-shaped opening angle is 2sin ⁻¹ (NAL), which can be changed by selecting the convex lens 14 . In addition, when the lens 14 adopts a cylindrical lens, it becomes waveguide light traveling with a certain width, rather than fan-like diffused light.

The waveguide light 16 is partially scattered by the scattering element (hologram) 19 provided in the core layer or the cladding layer, and leaks to the outside of the waveguide. If the scattering elements 19 have a periodic structure, there is a direction in which the scattered light from each scattering element has the same phase, so that the diffracted light 17 in this direction also has traveling light outside the waveguide, and they form the hologram 20 . Information can be read out by acquiring this hologram image with a two-dimensional photodetection device such as a CCD (Charge Coupled Devices), which is a charge-coupled device.

In addition, in this embodiment, a two-dimensional light detector is used as a light receiving element for illustration, but it is not limited thereto. That is, one-dimensional or two-dimensional scanning can be performed using a one-dimensional light-receiving element, that is, a linear sensor, or a light-receiving element that detects light at a specific point, that is, a photodetector.

In addition, by moving the convex lens 14 in FIG. 2, the waveguide layer through which light is transmitted can be changed, and the information recorded in each layer can be individually read.

Fig. 3 is a diagram illustrating another example of the structure of a laminated waveguide hologram ROM and the method of light input and output. In this example, at least one of the overlapping planar waveguide end surfaces serves as a reflection surface 15 that forms an angle of 45° with respect to the direction (normal direction) perpendicular to the waveguide plane. The hologram ROM of FIG. 3 differs from the hologram ROM of FIG. 2 in this point, but is the same as that of FIG. 2 in other respects. The hologram ROM of FIG. 3 also has a '" a periodic layer structure like that.

The position of the convex lens 14 is adjusted so that the reproducing laser light 13 is focused on a 45° chamfered core portion 18' of a predetermined waveguide. Here, when the reflection surface 15 is exposed, it becomes total reflection. It is not necessary to provide a reflective layer on the reflective surface. However, when protecting it with resin or the like for durability, it is necessary to form a dielectric film or metal film as a reflective layer in advance.

The light introduced into the waveguide from the reflection point 18' becomes the waveguide light 16', and travels in the waveguide mainly in the core layer in a fan shape. The subsequent operation of the waveguide light 16' is the same as in the case of Fig. 2, so it will be briefly described below. The waveguide light 16' is partially scattered by the scattering element (hologram) 19', and leaks out of the waveguide. Since the diffracted light 17' travels in a direction in which the phases of the scattered light from the scattering elements 19' are aligned, the light also travels outside the waveguide to form a hologram 20'.

Fig. 4 is a perspective view showing the structure of an optical storage medium according to Embodiment 2 of the present invention. An optical storage medium having an external size of 32 mm x 24 mm x 2.1 mm is constituted by a medium having an IC (flash) memory in the lower part 3-1 and a hologram ROM in the upper part 3-5. Media insertion orientation is 3-2.

In the optical storage medium, the connecting terminal connected with the IC memory in the IC memory part 3-1 is arranged on the end face or the following side of the medium insertion direction 3-2 side of the optical storage medium, and is configured to be connected with the optical storage medium inserted into the optical storage medium. The electrode terminals of the reproduction device are in contact.

In addition, the light incident portion of the hologram ROM 3-5 is arranged on the side adjacent to the side on which the connection terminals of the IC memory are arranged. In order to reproduce the light of the information recorded in the hologram ROM3-5, for example, as shown in Figure 4, when the light incident part is arranged on the left side toward the medium insertion direction 3-2, the light incident part is from the 3-3 direction. incident. The light incident from the light incident portion is propagated through the waveguide in the hologram ROM 3-5, and is diffracted by the hologram provided in the waveguide.

At this time, the light propagating in the waveguide is diffracted to the upper and lower sides in the direction perpendicular to the 32mm×24mm plane, but on the surface of the IC memory part 3-1 that is in contact with the side opposite to the diffracted light extraction side of the hologram ROM3-5 Above, there is a light absorber that converts the light diffracted in this direction into heat. Therefore, the light diffracted in the 3-4 direction perpendicular to the 32mm×24mm plane is finally extracted as signal light, and formed as a reproduced image on the two-dimensional light receiving element provided on the optical storage medium reproducing device.

Also, in the present embodiment, an example in which the IC memory part 3-1 and the hologram ROM 3-5 are fixedly pasted is shown, but they can be placed on the left and right sides or the front and rear sides of the medium insertion direction 3-2 as in the first embodiment. The guide rail part is set, and the structure of the pluggable hologram ROM3-5 is set.

In addition, in this embodiment, a two-dimensional light detector is used as the light receiving element, but it is not limited thereto. One-dimensional or two-dimensional scanning can also be performed using a one-dimensional light-receiving element, namely a linear sensor, or a light-receiving element that detects light at a specific point, that is, a photodetector.

Furthermore, when stacking the stacked waveguide hologram ROM3-5 and the memory 3-1, the order is not limited as long as the memory 3-1 does not block the signal light (diffracted light) emitted from the stacked waveguide hologram ROM3-5.

5A and 5B are perspective views showing the structure of an optical storage medium according to Embodiment 3 of the present invention. FIG. 5A is a schematic diagram of the optical storage medium 6-1 when the laminated waveguide hologram ROM6-2 and the memory 6-3 are stacked in two layers vertically (that is, in the thickness direction) in the shape of a flat plate.

The memory 6-3 can adopt: flash memory (for example, SD (Secure Digital) memory card, storage bar, etc.), HDD (Hard Disk Drive) (for example, microdrive, etc.), MT (Magnetic Tape) (for example, magnetic strip (Magnetic Stripe) or magnetic tape, etc.), contact/non-contact IC chips, IC labels, optical disks (such as CD, DVD, AOD (Advanced Optical Disk), BD (Blu-ray Disk), MO series ROM, R , RW), recording hologram memory, etc.

As the data recorded in the memory 6-3, formatting information, ID (Identification), encryption key, band expiration information, store information on a map, and the like unique to the laminated waveguide hologram ROM 6-2 can be considered. For example, it is conceivable to record the data of a blank map that changes little with time in the read-only laminated waveguide hologram ROM 6-2, and record the data of a map that changes quickly with time in the memory 6-3 using a readable and writable RAM. store information, etc. According to this structure, only the data to be updated can be recorded in the memory 6-3 and processed, so it is easy for the user to manage.

In addition, in this embodiment, the situation of the vertical double-layer stacked configuration of the stacked waveguide hologram ROM6-2 and the memory 6-3 is described, but it is not limited to the double-layer stacked structure, and a structure with more than three stacked segments can be used . In addition, the lamination order of the waveguide hologram ROM 6-2 and the memory 6-3 is not limited to the order shown in FIG. 5A.

In other words, the laminated waveguide hologram ROM 6-2 can be arranged below and the memory 6-3 can be arranged above. In addition, there is no particular limitation on the order of stacking the laminated waveguide hologram ROM6-2 and the memory 6-3 in three or more layers, as long as the memory 6-3 does not block the signal light (diffracted light) emitted from the laminated waveguide hologram ROM6-2. ), which can be stacked in various orders.

In addition, in FIG. 5A, the case where the optical storage medium 6-1 is formed by stacking the laminated waveguide hologram ROM 6-2 and the memory 6-3 vertically in two layers has been described, but the structure in FIG. 5B can also be used. That is, the laminated waveguide hologram ROM 6-2 and the memory 6-3 can be arranged side by side in a planar shape (ie, in the width direction or the entry direction) to form an integrated optical storage medium 6-4. In addition, other than the structure of the optical storage medium shown in Figs. 5A and 5B, a structure integrally formed by combining the stacked hologram ROM 6-2 and the memory 6-3 vertically, horizontally, internally and externally may be adopted.

FIG. 6 shows the structure of an optical storage medium reproducing apparatus according to Embodiment 4 of the present invention.

The optical storage medium 4-1 is an example of the medium shown in FIG. 4 . The medium 4-1 is inserted in the direction 4-2. There is an IC (flash) memory part on the lower side of the medium 4-1, and an electrode terminal 4-6 and a processing circuit 4-7 are provided for data transfer with the IC memory.

When the optical storage medium 4-1 was inserted into the optical storage medium reproduction device, the connecting terminal connected with the IC memory of the optical storage medium 4-1 was in contact with the electrode terminal 4-6 of the optical storage medium reproduction device, so that the processing circuit 4-7 and Data transfer between IC memories becomes possible. In order to reproduce the information recorded in the hologram ROM, laser light is incident on the thus inserted optical storage medium 4-1 from the direction 4-5.

The laser light is converged by Fresnel cylindrical lens 4-4. To select the layer of the hologram ROM to be reproduced, the cylindrical lens 4-4 is controlled up and down (4-10 direction) by the actuator 4-3. The waveguide light traveling in the selected waveguide layer is diffracted by the hologram, and reaches the CCD 4-9 through the liquid crystal matrix shutter 4-8 to form a two-dimensional image. Also, the liquid crystal matrix shutters 4-8 are not necessary, and may not be provided.

Also, in this embodiment, a two-dimensional light detector is used as the light receiving element, but it is not limited thereto. One-dimensional or two-dimensional scanning can also be performed using a one-dimensional light-receiving element, namely a linear sensor, or a light-receiving element that detects light at a specific point, that is, a photodetector.

FIG. 7 shows the structure of an optical storage medium reproducing apparatus according to Embodiment 5 of the present invention.

The optical storage medium 5-1 is an example of the medium shown in FIG. 1 . The medium 5-1 is inserted along the direction 5-2. The front part of the medium 5-1 has an IC (flash) memory part, and electrode terminals 5-6 and a processing circuit 5-7 are provided for data transfer with the IC memory.

When the optical storage medium 5-1 was inserted into the optical storage medium reproduction device, the connection terminal connected with the IC memory of the optical storage medium 5-1 was in contact with the electrode terminal 5-6 of the optical storage medium reproduction device, and the processing circuit 5-7 could be performed Data transfer with IC memory. To reproduce the information recorded in the hologram ROM, laser light is incident from the direction 5-5 to the thus inserted optical storage medium 5-1.

Laser light 5-5 is converged by Fresnel cylindrical lens 5-4. In order to select the layer to be reproduced of the hologram ROM, the cylindrical lens 5-4 is controlled in the up and down direction 5-10 by the adjuster 5-3. The cylindrical lens 5-4 and adjuster 5-3 may be shorter than (4-3, 4-4) shown in FIG. 5 . The waveguide light traveling in the selected waveguide layer is diffracted by the hologram, and reaches the CCD 5-9 through the liquid crystal matrix shutter 5-8 to form a two-dimensional image. Also, the liquid crystal matrix shutters 4-8 are not necessary, and may not be provided.

Also, in this embodiment, a two-dimensional light detector is used as the light receiving element, but it is not limited thereto. One-dimensional or two-dimensional scanning can also be performed using a one-dimensional light-receiving element, namely a linear sensor, or a light-receiving element that detects light at a specific point, that is, a photodetector.

Also, the fourth and fifth embodiments described above can also be applied to existing IC memory cards. In this case, whether the signal light is detected by the two-dimensional light-receiving elements (CCD4-9, 5-9) is inserted into the slot, and it is judged whether the installed medium is the optical storage medium shown in Figure 1 or Figure 4 or another IC storage medium. Card.

The processing procedure for this determination is shown below.

Step 1: insert the optical storage medium of Fig. 1 or Fig. 4 in the slot, the connection terminal of optical storage medium contacts with electrode terminal 4-6, 5-6, becomes between processing circuit 4-7, 5-7 and IC memory Data transferable status. Accordingly, the determination circuits included in the processing circuits 4-7, 5-7 detect insertion of an optical storage medium or an IC memory card having the same shape.

Step 2: The determination circuit irradiates the laser light from the incident optical system 4-4, 5-4 to a predetermined position where the light incident part of the optical storage medium should exist. At this time, the adjusters 4-3, 5-3, etc. are controlled by the same method as in the case where the hologram ROM exists, by making the laser beam incident on the layer where the hologram information is recorded.

Step 3: When there is a hologram ROM, the irradiated laser light enters the layer on which the hologram information of the hologram ROM is recorded, propagates through the layer, and diffracts the light by the hologram provided in the layer. The two-dimensional light receiving elements 4-9, 5-9 detect the diffracted light from the hologram. On the other hand, light does not diffract in the absence of the hologram ROM, so the two-dimensional light receiving elements 4-9, 5-9 do not detect diffracted light. The determination circuit monitors whether or not diffracted light is detected by the two-dimensional light receiving elements 4-9, 5-9.

Step 4: When the two-dimensional light-receiving elements 4-9 and 5-9 detect diffracted light, the judging circuit judges that the inserted optical storage medium is inserted, and proceeds to step 5. On the other hand, when the diffracted light is not detected by the two-dimensional light receiving elements 4-9, 5-9, the judging circuit judges that an IC memory card having the same shape as the optical storage medium is inserted, and proceeds to step 6.

Step 5: The judging circuit is provided with a processing circuit, and sends information that the hologram ROM and IC memory have been installed to the main control circuit that communicates with external devices such as PCs connected to the optical storage medium playback device or manages other processing. In addition, the main control circuit makes an answer about the installation of the hologram ROM and the IC memory to an inquiry about what kind of card is inserted from the external device, and at the same time executes data reading from the hologram ROM and reading of the IC memory according to instructions from the external device. write data.

Step 6: The determination circuit sends information to the above-mentioned main control circuit that only the IC memory is installed, and at the same time stops the driving of the laser and the regulators 4-3, 5-3. In addition, the main control circuit responds to an inquiry about what kind of card is inserted from the external device by installing only the IC memory, and at the same time executes data reading and writing to the IC memory in accordance with an instruction from the external device.

Also, in step 1, a sensor that detects the insertion of an optical storage medium or an IC memory card of the same shape may be used in advance, and the method of detecting based on the output of the sensor may be used instead of detecting that an optical storage medium or an IC memory card of the same shape is inserted. In the case of an IC memory card, the detection method is performed by processing data transfer between the circuits 4-7, 5-7 and the IC memory.

In addition, in step 3, when monitoring whether the two-dimensional light-receiving elements 4-9, 5-9 detect diffracted light, it is also possible to monitor whether at least a part of the two-dimensional light-receiving element detects light, or to monitor the two-dimensional light-receiving element. Whether or not light is detected in a particular partial area. However, when monitoring whether or not light is detected in a specific partial area of the two-dimensional light receiving element, the hologram ROM is configured in advance so that at least a part of some reproduced images is always formed on the specific area of the two-dimensional light receiving element.

In addition, the determination circuit can usually be configured to determine whether the optical storage medium or the IC memory card is inserted only once when the optical storage medium or the IC memory card is inserted into the optical storage medium device. However, in the structure of the hologram ROM in which the optical storage medium is inserted into the optical storage medium device and can be directly plugged in, even if the optical storage medium remains in the state of being inserted into the optical storage medium device, the judging circuit is preferably configured to periodically judge the hologram. Whether the ROM is inserted. In this case, step 1 may be performed only once, and then step 2 to step 6 may be repeatedly performed at predetermined time intervals.

8A to 8C are schematic diagrams showing the arrangement of drives in the optical storage medium playback device according to Embodiment 6 of the present invention. FIG. 8A shows a case where the driver 7-2 for reading the laminated waveguide hologram ROM of the optical storage medium reproducing device 7-1 and the driver 7-3 for reading and writing the memory are arranged independently. In this case, in the optical storage medium reproducing apparatus 7-1, the two slots for inserting the laminated waveguide hologram ROM and the slot for inserting the memory are respectively located in the optical storage medium reproducing apparatus 7-1. in front of.

Optical storage medium reproducing device 7-1 can be made of mobile equipment etc., specifically, can adopt following device to make up: portable phone, game machine, music recorder/player, video recorder/player, television set, electronic dictionary, pinball slot machine (pachinko-slot), car navigation system, electronic book (e-book), PDA (Personal Digital Assistant), textbook recorder/player, notebook computer, personal computer, server, etc.

FIG. 8B shows the case where the driver 7-2 for reading the stacked waveguide hologram ROM of the optical storage medium reproducing device 7-5 and the driver 7-3 for reading and writing the memory are vertically overlapped.

At this time, in the optical storage medium reproducing device 7-5, the two slots for inserting the laminated waveguide hologram ROM and the slot for inserting the memory are independently provided in the optical storage medium reproducing device 7-5. Front. However, it is considered to be composed of one slot in appearance, which can improve user convenience compared with the case of having two slots.

In addition, FIG. 8B shows the case where the driver 7-2 for reading and writing the laminated waveguide hologram ROM is arranged above and the driver 7-8 for reading and writing the memory 7-3 is arranged below, but it is not limited to this, and it can also be reversed. configuration.

Fig. 8C shows an optical storage medium reproducing apparatus 7-6 in which one driver 7-4 is shared between the reading of the laminated waveguide hologram ROM and reading and writing of the memory. At this time, the slot for inserting the laminated waveguide hologram ROM and the slot for inserting the memory in the optical storage medium reproducing apparatus 7-6 are shared, and there is only one slot.

In the optical storage medium playback device 7-6, after determining which drive to use based on the type of medium inserted from the slot, processing such as data reading is performed using the drive corresponding to the inserted medium.

With the structure shown in FIG. 8C , the user does not need to determine which drive to insert the medium into, so the user's convenience can be improved.

As mentioned above, this invention application was demonstrated based on an Example. Also, the above-mentioned Embodiments 1 and 2 are characterized in that the optical storage medium is inserted into an existing IC memory card slot such as an SD memory card, for example. Of course, when the hologram ROM of the present invention is inserted into a slot for an existing IC memory card that does not have a reproduction function of the hologram ROM, information cannot be reproduced. Therefore, in Embodiments 4 and 5, in addition to the existing IC card memory reproducing device, a two-dimensional light-receiving element such as a CCD or a CMOS (Complementary Metal Oxide Semiconductor) sensor for reproducing the hologram ROM is added, and a light input device for light input to the waveguide is added. Laser source and lens, signal conversion circuit for converting the light pattern imaged on the two-dimensional light receiving element into data signal, so that it can be read even when the optical storage medium with hologram ROM is inserted but not inserted into the IC memory card information.

Also, in Embodiments 1, 2, 4, and 5 of the present invention, the case where an optical storage medium is constituted by combining a laminated waveguide hologram ROM and an IC memory into one body has been described, but the present invention is not limited thereto. . That is to say, as the memory used for data reading and writing, as long as it is in the form of being connected to the optical storage medium playback device with electrical terminals, various memories (for example, Flash memory, HDD, MT, etc.) to replace IC memory, the same effect can be achieved by using these memories.

In addition, in each of the above-mentioned embodiments, neither the IC memory alone nor the hologram ROM alone is used as the recording medium, but a memory that integrates the two is used. 24mm × 2.1mm consistent. Also, if the overall size is 32mm x 24mm x 2.1mm or less, the recording medium can be mounted and used in an adapter that can be inserted into the SD memory card slot.

According to the present invention, one card memory slot can be shared, the information to be updated by the user can be updated with the memory, and the content can be reproduced from the hologram ROM (Read Only Memory).

By making the external shape of the optical storage medium and the interface style of the memory the same as those of conventional memory cards (for example, IC memory cards), compatibility between the optical storage medium and conventional memory cards can be ensured.

It is possible to determine whether the memory card inserted into the slot is the above-mentioned optical storage medium or an existing memory card without completely changing the interface style of the existing memory.

Industrial Utilization Possibility

According to the present invention, a large-capacity content can be obtained from the hologram ROM and user information can be rewritable through the memory by interchanging and mixing the memory such as the hologram ROM storing the content and the flash memory capable of rewriting data. to record.

It is possible to record large-capacity data such as music on a low-cost laminated waveguide hologram ROM, and to record license information on the data in RAM. These usages can be used in fields such as the music industry.

Claims (15)

1. optical storage media is characterized in that being provided with:

Utilize and at least one layered waveguide hologram ROM the corresponding diffraction light sense data of the incident light of layered waveguide hologram, and

With described layered waveguide hologram ROM one at least one storer that constitute, that be used for reading and writing data.

2. optical storage media as claimed in claim 1 is characterized in that: be provided with the rail portion of fixing described layered waveguide hologram ROM, have the structure that this layered waveguide hologram ROM can freely plug.

3. optical storage media as claimed in claim 2 is characterized in that: described rail portion is provided with the groove of preset width and length, fixes a hologram ROM in this groove at least.

4. optical storage media as claimed in claim 1 is characterized in that:

Described read-write storer is the IC storer,

With the described IC storer predetermined edge part of terminal arrangement at this optical storage media,

On another edge part adjacent, dispose the incident section of described layered waveguide hologram ROM with reference light with the edge part that has disposed this IC storer usefulness terminal.

5. optical storage media as claimed in claim 4 is characterized in that: physical dimension constitutes 32mm * 24mm * 2.1mm, perhaps constitutes with the little size in whole each limit or arbitrary limit.

6. optical storage media as claimed in claim 1 is characterized in that:

Described layered waveguide hologram ROM and the described storer writing board shape of respectively doing for oneself,

Described layered waveguide hologram ROM and described storer overlapping and one on thickness direction constitutes.

7. optical storage media as claimed in claim 1 is characterized in that:

Described layered waveguide hologram ROM and the described storer writing board shape of respectively doing for oneself,

Described layered waveguide hologram ROM and described storer on Width or approach axis side by side and one constitutes.

8. optical storage media as claimed in claim 1 is characterized in that: absorber of light is set taking out on the face that relative side, side joins with the described diffraction light of described layered waveguide hologram ROM.

9. a playback record is characterized in that in the optical memory medium reproducing device of the data of optical storage media:

Described optical storage media is provided with at least one the layered waveguide hologram ROM that utilizes with to the corresponding diffraction light sense data of the incident light of layered waveguide hologram, and

With described layered waveguide hologram ROM one at least one storer that constitute, that be used for reading and writing data;

Be provided with in the described optical memory medium reproducing device:

Make light incide the light incident parts of described layered waveguide hologram,

Receive light with the incident of described smooth incident parts by the light of described layered waveguide hologram diffraction, and be transformed into the light receiving component of electric signal, and

Described read-write is carried out the data recording/reproducing parts of reading and writing data with storer.

10. optical memory medium reproducing device as claimed in claim 9, it is characterized in that also being provided with: whether detect from the diffraction light of described layered waveguide hologram ROM outgoing according to described light receiving component, judge whether the medium that insert are the judging part of described optical storage media.

11. judge with judging part for one kind and it is characterized in that the decision method of the medium kind in the optical memory medium reproducing device of packing into:

The described optical memory medium reproducing device playback record that is provided with described judging part is in the data of optical storage media, described optical storage media is provided with at least one the layered waveguide hologram ROM that utilizes with to the corresponding diffraction light sense data of the incident light of layered waveguide hologram, and with described layered waveguide hologram ROM one at least one storer formation, that be used for reading and writing data;

Described decision method comprises:

Survey the first step that medium have been loaded into;

Make illumination be mapped to second step in the precalculated position of described medium of packing into;

Supervision has or not the third step that detects from the diffraction light of layered waveguide hologram ROM; And

When detecting described diffraction light, judge that described medium of packing into are the 4th steps of described optical storage media.

12. decision method as claimed in claim 11 is characterized in that: described the 4th step is to judge the step that described medium of packing into are the IC storage cards when not detecting described diffraction light.

13. decision method as claimed in claim 11 is characterized in that: in described the 4th step, judge when described medium of packing into are not described optical storage medias that described decision circuit makes described light stop irradiation.

14. decision method as claimed in claim 11 is characterized in that:

In the described third step,

Detect described diffraction light with two-dimensional photoreceptor,

Monitor that whether at least a portion zone of described two-dimensional photoreceptor has detected described diffraction light.

15. decision method as claimed in claim 11 is characterized in that:

Under described optical storage media is packed the state of described optical storage media device into during pluggable hologram ROM,

After carrying out described first step, repeat described second to the 4th step on schedule at interval.

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