JP2004054982A - Information recording device and information recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce difficulties in setting and maintaining positional relationship among a plurality of optical means and to improve the utilization rate of a plurality of light beams when a plurality of light beams is made incident on an optical recording medium and information is recorded or information is reproduced. <P>SOLUTION: An information recording device is provided with a laser light source 21, optical systems 22 and 45, a one dimensional optical modulation section 23 in which a plurality of reflection optical modulators is arranged in line and a modulation control signal transmitting section 35 which supplies modulation control signals to the modulators based on the information to be recorded. The laser light beams from the light source 21 are made incident on the section 23. A plurality of modulated laser light beams, which is obtained from the section 23, modulated in accordance with the modulation control signals and arranged in a linear manner, is made incident on an optical tape 47 while two adjacent beams are made closer or made into mutually contact and information to be recorded on the tape 47 is recorded. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The invention described in the claims of the present application provides a state in which a light beam modulated according to information to be recorded on an optical recording medium is made incident, and information to be recorded on the optical recording medium is recorded. An information recording device to be obtained, and a light beam modulated according to the information to be recorded on the optical recording medium is made incident, and a state where the information to be recorded on the optical recording medium is recorded, and the information is recorded. Information recording in which a light beam is incident on an optical recording medium, and a light beam modulated according to the information recorded on the optical recording medium is obtained from the optical recording medium, and information is reproduced based on the information. It relates to a playback device.
[0002]
[Prior art]
In the field of recording information on a recording medium and reproducing information from the recording medium on which information is recorded, for example, it is desired to record and reproduce moving image data using a relatively small-sized recording and reproducing means. In such an environment, higher density recording of information on a recording medium and a higher transfer rate (higher speed) of recording or reproduction information are required more than before. Under these circumstances, in order to satisfy the demand for high-density recording of information and a high transfer rate of recorded or reproduced information, multiple light beams are incident on an optical recording medium capable of recording information using light. A multi-beam recording / reproducing technique for recording and reproducing information in this way has been proposed.
[0003]
In the multi-beam recording / reproducing technology, a high-density recording of information is achieved by using a light beam such as a laser beam for recording and reproducing information, and also used for recording and reproducing information. Since a plurality of light beams are mutually independent, a high transfer rate of recording or reproduction information is achieved. As one of information recording / reproducing apparatuses to which such a multi-beam recording / reproducing technique is applied, a tape-shaped optical recording medium, that is, an optical tape recording / reproducing apparatus using an optical tape is conventionally known (for example, , "Novel digital optical tape recorder", Oakley, William S .; AA (LaserTape Inc.) Publication: Proc. SPIE Vol. 2604, p. 256-262).
[0004]
FIG. 15 shows an essential part of an example of a conventionally proposed optical tape recording / reproducing apparatus. The optical tape recording / reproducing apparatus shown in FIG. 15 includes a laser light source 1 that continuously emits a single laser light beam as a parallel light beam. A laser light beam emitted from a laser light source 1 enters a beam forming hologram 2.
[0005]
In the beam forming hologram 2, a single laser light beam, which is a parallel light beam emitted from the laser light source 1, is divided into a plurality of laser light beams each forming a parallel light beam. That is, the beam forming hologram 2 splits and forms a plurality of parallel light beams from a single parallel light beam.
[0006]
A plurality of laser light beams obtained from the beam forming hologram 2 are incident on the polarization beam splitter 3, reflected on the polarization beam splitter 3 downward in FIG. 15, pass through the quarter-wave plate 4, and are condensed. The light enters the lens 5. The condenser lens 5 causes the plurality of laser light beams that have passed through the 波長 wavelength plate 4 to be focused and incident on the two-dimensional light modulator 6.
[0007]
The two-dimensional light modulator 6 is configured such that a plurality of reflection type light modulators are two-dimensionally arranged at a predetermined mutual interval on a common plane portion. A plurality of laser light beams from the condenser lens 5 form a plurality of two-dimensionally arranged light spots P as shown in FIG. 16 on a common plane portion in the two-dimensional light modulator 6. Is done. The number of light spots P shown in FIG. 16 is 8 × 8 = 64. In such a case, 64 laser light beams arranged two-dimensionally and arranged on the two-dimensional light modulator 6 are incident.
[0008]
The plurality of reflection type optical modulators arranged two-dimensionally on the common plane portion of the two-dimensional light modulation unit 6 are configured such that a plurality of laser light beams incident on the two-dimensional light modulation unit 6 Positions respectively correspond to a plurality of light spots P formed on the common plane portion. FIG. 17 shows an example of an arrangement arrangement of a plurality of reflection type optical modulators in the two-dimensional light modulation unit 6. In this example, each of the plurality of reflection type optical modulators has a rectangular portion with a symbol LM. Have been. Then, a light spot P is formed on each reflection type optical modulator LM.
[0009]
As shown in FIG. 18, in each of the plurality of reflection type optical modulators LM arranged two-dimensionally on the common plane portion of the two-dimensional optical modulator 6, a laser beam is incident and a light spot P is formed. The rear surface facing the light incident surface to be formed forms a light reflection surface RF. Thereby, the laser light beam incident on each reflection type optical modulator LM is reflected by the light reflection surface RF.
[0010]
A modulation control signal transmission unit 7 is provided in connection with such a two-dimensional light modulation unit 6. The modulation control signal transmitting section 7 forms a plurality of modulation control signals SM according to information to be recorded, and supplies them to the plurality of reflection type optical modulators in the two-dimensional light modulation section 6, respectively. As a result, each of the plurality of reflection-type light modulators in the two-dimensional light modulation unit 6 modulates the laser light beam incident thereon and reflected therefrom in accordance with the modulation control signal SM, as described above. . The modulation of the laser light beam is performed by changing the reflection amount of the incident laser light beam according to the modulation control signal SM. Note that, depending on the content of the modulation control signal SM from the modulation control signal transmission unit 7, the laser light beam incident on each reflection type optical modulator is reflected without being substantially modulated.
[0011]
As a result, from the two-dimensional light modulator 6, a plurality of lasers that are modulated and reflected in accordance with the modulation control signal SM in a plurality of reflective optical modulators two-dimensionally arranged on the common plane portion, respectively. The light beam or the plurality of laser light beams reflected without being modulated by the plurality of reflection type light modulators arranged two-dimensionally on the common plane portion are obtained as being directed to the condenser lens 5. Can be
[0012]
The plurality of laser light beams obtained from the two-dimensional light modulator 6 pass through the condenser lens 5 and the 波長 wavelength plate 4 and enter the polarization beam splitter 3. Since a plurality of laser light beams incident on the polarization beam splitter 3 and obtained from the two-dimensional light modulator 6 have reciprocated through the quarter-wave plate 4, the beam formation incident on the polarization beam splitter 3 is performed. The polarization plane is rotated by 90 ° compared to the plurality of laser light beams from the hologram 2, and passes through the polarization beam splitter 3.
[0013]
The plurality of laser light beams transmitted through the polarizing beam splitter 3 pass through a quarter-wave plate 8, and enter an optical tape 10 as an optical recording medium through an optical system 9 for controlling a light beam. The optical system 9 focuses each of the plurality of laser light beams incident on the optical tape 10 on the optical tape 10 and controls each of the plurality of laser light beams incident on the optical tape 10. And tracking control to make the optical tape 10 enter an appropriate position. The optical tape 10 travels in a direction indicated by an arrow A, for example, by a tape drive mechanism (not shown).
[0014]
When a plurality of laser light beams passing through the optical system 9 enter the optical tape 10, for example, as shown in FIG. 19, a plurality of laser light beams two-dimensionally arranged and arranged by the plurality of laser light beams on the optical tape 10. Is formed. The number of the light spots Q shown in FIG. 19 is 8 × 8 = 64. In such a case, 64 laser light beams arranged two-dimensionally and arranged on the optical tape 10 are incident.
[0015]
The plurality of light spots Q formed on the optical tape 10 and arranged two-dimensionally are arranged such that one of two orthogonal arrangement directions of the optical tape 10 in the arrangement is indicated by an arrow A. The predetermined angle α is formed with respect to the traveling direction. Accordingly, as the optical tape 10 travels, the number of recording tracks corresponding to the number (for example, 64) of the light spots Q along the traveling direction of the optical tape 10 on the optical tape 10 is increased. t.
[0016]
When the plurality of laser light beams incident on the optical tape 10 are not modulated by the two-dimensional light modulator 6, they are modulated according to the information recorded on the optical tape 10, and The light is reflected at 10 and obtained from the optical tape 10 toward the optical system 9. The plurality of laser light beams obtained from the optical tape 10 pass through the optical system 9 and the 波長 wavelength plate 8 and enter the polarization beam splitter 3. Since a plurality of laser light beams incident on the polarization beam splitter 3 and obtained from the optical tape 10 have reciprocated through the 波長 wavelength plate 8, the two-dimensional light modulation unit incident on the polarization beam splitter 3 The polarization plane is rotated by 90 ° as compared with the plurality of laser light beams from No. 6 and reflected by the polarization beam splitter 3 rightward in FIG.
[0017]
The plurality of laser light beams reflected by the polarization beam splitter 3 are incident on the light beam splitter 11, and a part of the laser light beams is reflected downward by the light beam splitter 11 in FIG. 15 and, for example, passes through an optical element 12 such as a cylindrical lens. The light enters the focus / tracking detection unit 13 and another part transmits through the light beam splitter 11 and enters the light detection unit 15 through an optical element 14 such as a condenser lens.
[0018]
The focus / tracking detection unit 13 outputs an output signal SF indicating a focus state and an output signal indicating a tracking state for the plurality of laser light beams incident on the optical tape 10 in accordance with the plurality of laser light beams incident through the optical element 12. Send ST. These output signals SF and ST are used for focus control and tracking control for each of a plurality of laser light beams incident on the optical tape 10 in the optical system 9.
[0019]
Further, the light detection unit 15 obtains a plurality of output signals SI, each of which changes in accordance with a change in each of the plurality of laser light beams incident through the optical element 14, and supplies them to the information reproduction unit 16. The information reproducing unit 16 reproduces information recorded on the optical tape 10 based on a plurality of output signals SI from the light detecting unit 15.
[0020]
In the optical tape recording / reproducing apparatus shown in FIG. 15, when information to be recorded on the optical tape 10 is recorded, the information changes according to the information to be recorded from the modulation control signal transmitting section 7. A plurality of modulation control signals SM are sent out and supplied to a plurality of reflection type optical modulators in the two-dimensional light modulation unit 6, respectively. Thereby, a plurality of laser beams modulated and reflected from the two-dimensional light modulator 6 in accordance with the modulation control signal SM by the plurality of reflective optical modulators arranged two-dimensionally on the common plane portion, respectively. The beam is obtained as going to the condenser lens 5.
[0021]
The plurality of laser light beams modulated in accordance with the modulation control signal SM obtained from the two-dimensional light modulator 6 pass through a condenser lens 5, a quarter wave plate 4, a polarizing beam splitter 3, and a quarter wave plate 8. Then, the light reaches the optical system 9 and enters the optical tape 10 under the focus control and tracking control by the optical system 9. As a result, information to be recorded is recorded on the optical tape 10 by a plurality of laser light beams modulated according to the modulation control signal SM, and information to be recorded on the optical tape 10 is recorded. A plurality of recording tracks are formed.
[0022]
On the other hand, in the optical tape recording / reproducing apparatus shown in FIG. 15, when reproducing the information recorded on the optical tape 10, a plurality of predetermined modulation control signals SM from the modulation control signal transmitting unit 7 are set. And these are supplied to a plurality of reflection type optical modulators in the two-dimensional optical modulator 6, respectively. Accordingly, the plurality of laser beams reflected from the two-dimensional light modulator 6 with a constant reflection amount without being modulated by the plurality of reflection type light modulators arranged two-dimensionally on the common plane portion. The beam is obtained as going to the condenser lens 5.
[0023]
A plurality of unmodulated laser light beams obtained from the two-dimensional light modulator 6 pass through a condenser lens 5, a quarter-wave plate 4, a polarizing beam splitter 3, and a quarter-wave plate 8, and are transmitted to an optical system 9. The light arrives at the optical tape 10 under the focus control and tracking control by the optical system 9, and is modulated and reflected by the optical tape 10 in accordance with the information recorded thereon, and optically reflected from the optical tape 10. Obtained as going to system 9. A plurality of laser light beams modulated according to the information recorded on the optical tape 10 obtained from the optical tape 10 pass through the quarter-wave plate 8, are reflected by the polarization beam splitter 3, and are reflected by the light beam splitter 11. Are divided and incident on the focus / tracking detection unit 13 through the optical element 12, and are divided and incident on the light detection unit 15 through the optical element 14.
[0024]
As a result, from the focus / tracking detection unit 13, an output signal SF indicating a focus state and an output signal ST indicating a tracking state for a plurality of laser light beams incident on the optical tape 10 are obtained. From this, a plurality of output signals SI that change according to changes in a plurality of laser light beams modulated according to information recorded on the optical tape 10 are obtained, and are supplied to the information reproducing unit 16. You. As a result, the information recorded on the optical tape 10 is reproduced in the information reproducing unit 16 based on the plurality of output signals SI from the light detecting unit 15.
[0025]
An optical tape recording / reproducing apparatus using a two-dimensional laser diode array, which has a different configuration and operation from the optical tape recording / reproducing apparatus shown in FIG. 15 as described above, has also been proposed. FIG. 20 shows an example of a two-dimensional laser diode array used in such an optical tape recording / reproducing apparatus. In the two-dimensional laser diode array 17 shown in FIG. 20, a plurality (for example, 3 × 3 = 9) surface emitting laser diodes 18 are two-dimensionally arranged.
[0026]
As shown in FIG. 21, the two-dimensional laser diode array 17 has a plurality of surface-emitting laser diodes 18 arranged two-dimensionally arranged in a state of facing or opposing to the optical tape 19. When information to be recorded is recorded on the optical tape 19, each of the plurality of surface emitting laser diodes 18 emits a laser light beam modulated according to the information to be recorded. To the optical tape 19. Thus, information to be recorded on the optical tape 19 is recorded.
[0027]
In such a case, for example, as shown in FIG. 22, one of two arrangement directions orthogonal to each other in the arrangement arrangement of the plurality of surface emitting laser diodes 18 in the two-dimensional laser diode array 17 is indicated by an arrow B. The predetermined angle β is formed with respect to the running direction of the optical tape 19. Accordingly, as the optical tape 19 travels, the number of recording tracks on the optical tape 19 corresponding to the number (for example, nine) of the surface-emitting laser diodes 18 each along the traveling direction of the optical tape 19, It is formed with a track pitch t '.
[0028]
When the information recorded on the optical tape 19 is reproduced in this manner, the two-dimensional laser diode array 17 records the information on the plurality of surface-emitting laser diodes 18 arranged two-dimensionally. The plurality of surface emitting laser diodes 18 are arranged so as to be in close or opposing contact with the optical tape 19, each of which emits a predetermined laser light beam, and makes the laser light beam enter the optical tape 19. The laser light beam incident on the optical tape 19 is modulated and reflected in the optical tape 18 according to the information recorded thereon, and returns to each surface emitting laser diode 18, thereby causing each surface emitting laser diode 18 to emit light. Causes oscillation fluctuations induced by the return light beam. The oscillation fluctuation generated by each of the surface emitting laser diodes 18 is detected, and the information recorded on the optical tape 19 is reproduced based on the detection output obtained thereby.
[0029]
[Problems to be solved by the invention]
In the optical tape recording / reproducing apparatus (an optical tape recording / reproducing apparatus using a beam forming hologram and a two-dimensional light modulating unit) shown in FIG. A plurality of laser light beams split and formed from the beams are respectively incident on a plurality of reflective light modulators arranged two-dimensionally in a two-dimensional light modulation unit. Under these circumstances, in order to obtain a state in which each of the plurality of laser light beams from the beam forming hologram is accurately incident on the corresponding reflection type light modulator in the two-dimensional light modulation unit, it is necessary to use the beam forming hologram. It is necessary that the positional relationship of various optical means up to the three-dimensional light modulation unit be set and maintained strictly. However, it is extremely difficult to actually set and maintain the positional relationship of such optical means strictly because a plurality of reflective light modulators in the two-dimensional light modulator are two-dimensionally arranged. It is said. For this reason, inconveniences such as a necessary laser light beam loss and a decrease in the utilization rate of the laser light beam due to inaccuracy of the positional relationship of the optical means occur.
[0030]
Further, a plurality of two-dimensionally arranged light spots formed on the optical tape by a plurality of laser light beams incident on the optical tape, one of two orthogonal arrangement directions in the arrangement, Since a predetermined angle is formed with respect to the running direction of the optical tape, information recorded on the optical tape with a plurality of recording tracks has a phase difference between the recording tracks. Therefore, in reproducing the information recorded on the optical tape, the information reproducing unit performs collective signal processing on a plurality of detection signals from the light detecting unit to easily reproduce the information recorded on the optical tape. And complicated signal processing is required to reproduce the information recorded on the optical tape.
[0031]
Further, in the optical tape recording / reproducing apparatus using the two-dimensional laser diode array shown in FIG. 20, which has been conventionally proposed, the two-dimensional laser diode array has a plurality of surfaces on which a two-dimensional array is arranged. Since each of the light emitting laser diodes is realized only as emitting a laser light beam having a very small power of, for example, about 20 μW, a plurality of surface emitting laser diodes in a two-dimensional laser diode array are actually used. It is required that the optical tape be substantially in contact with the optical tape. As a result, non-contact information recording or reproduction on an optical recording medium, which is one of the main features of information recording or information reproduction using a light beam, can be performed, and the optical recording medium is less susceptible to foreign substances and the like. The advantage is lost.
[0032]
In addition, in the two-dimensional laser diode array facing the optical tape, a plurality of surface emitting laser diodes arranged two-dimensionally are arranged such that one of two orthogonal arrangement directions in the arrangement is an optical tape. Is formed at a predetermined angle with respect to the traveling direction, the information recorded on the optical tape with a plurality of recording tracks has a phase difference between the recording tracks. Therefore, also in this case, when reproducing the information recorded on the optical tape, the information reproducing unit performs collective signal processing on a plurality of detection signals from the light detecting unit to easily process the information recorded on the optical tape. Therefore, complicated signal processing is required to reproduce the information recorded on the optical tape.
[0033]
In view of such a point, the invention described in the claims of the present application records light on an optical recording medium by irradiating a light beam such as a plurality of laser light beams onto an optical recording medium such as an optical tape, or In recording information on an optical recording medium and reproducing information from the optical recording medium, a plurality of light beams that transmit or reflect a plurality of light beams while being able to perform non-contact information recording or reproduction on the optical recording medium are used. Difficulty in setting and maintaining the positional relationship of the optical means will be reduced, the utilization of multiple light beams will be improved, and the reproduction of information recorded on the optical recording medium will be improved. Provided are an information recording device and an information recording / reproducing device which can be relatively easily performed without requiring complicated signal processing.
[0034]
[Means for Solving the Problems]
An information recording device according to any one of claims 1 to 10 in the claims of the present application includes a recording medium drive control unit that drives an optical recording medium, a light source unit that emits a light beam, and a plurality of light source units. A one-dimensional light modulator in which light modulators are linearly arranged; a first optical system for causing a light beam from a light source to enter the one-dimensional light modulator; and a plurality of lights of the one-dimensional light modulator. A modulation control signal transmission unit for supplying a modulation control signal based on information to be recorded to the modulation unit, and an arrangement arrangement of a plurality of light modulation units modulated according to the modulation control signal obtained by the one-dimensional light modulation unit A plurality of light beams arranged and arranged according to are incident on an optical recording medium driven by a recording medium drive control unit in a state where two adjacent ones are close to or in contact with each other, and information to be recorded on the optical recording medium Is recorded Configured to include a second optical system state and eggplant, the.
[0035]
An information recording / reproducing apparatus according to claim 11 or claim 12 of the present application includes a recording medium drive control unit that drives an optical recording medium, a first light source unit that emits a light beam, and a plurality of light source units. A one-dimensional light modulating section in which light modulating means are linearly arranged, a first optical system for causing a light beam from the first light source to enter the one-dimensional light modulating section, and a one-dimensional light modulating section. A modulation control signal transmitting unit that supplies a modulation control signal based on information to be recorded to the plurality of light modulation units; and a plurality of light modulation units that are modulated according to the modulation control signal and that are obtained by the one-dimensional light modulation unit. A plurality of light beams arranged and arranged in accordance with the arrangement arrangement are made incident on an optical recording medium driven by a recording medium drive control unit in a state where two adjacent ones are close to or in contact with each other, and are recorded on the optical recording medium. Records of information to be A second optical system to be performed, a second light source unit that emits a light beam, and a light beam from the second light source unit incident on an optical recording medium driven by a recording medium drive control unit. A third optical system in which a light beam modulated according to information recorded thereon is obtained from an optical recording medium, and a light detection unit that generates an output signal that changes in accordance with a change in the incident light beam. A fourth optical system for causing a light beam obtained from the optical recording medium on which the light beam from the second light source unit is incident to the light detecting unit, and the optical recording medium based on an output signal obtained from the light detecting unit. And an information reproducing unit that reproduces the recorded information.
[0036]
An information recording / reproducing apparatus according to any one of claims 13 to 15 in the claims of the present application comprises: a recording medium drive control unit that drives an optical recording medium; a light source unit that emits a light beam; A polarizing beam splitter, into which a light beam from a light source enters, a one-dimensional light modulation unit in which a plurality of reflection-type light modulation means are linearly arranged, and a light beam from a light source unit reflected by the polarization beam splitter, A modulation control signal based on information to be recorded or a preset modulation control signal is supplied to the first optical system that enters the original light modulation unit and the plurality of reflective light modulation units of the one-dimensional light modulation unit. A modulation control signal transmitting unit and a plurality of reflection type optical modulation means are modulated according to the modulation control signal and reflected, or are reflected without modulation, and are obtained by a plurality of reflection type light modulation means. A plurality of light beams, which are arranged according to the arrangement of the modulation means and pass through the first optical system and the polarizing beam splitter, are brought into close proximity to an optical recording medium driven by a recording medium drive control unit. Or, it is incident as a state of mutual contact, and a state where information to be recorded on the optical recording medium is recorded, or a plurality of light beams modulated according to the information recorded on the optical recording medium are transmitted from the optical recording medium. A second optical system to be obtained, a photodetector that generates an output signal that changes in accordance with a change in an incident light beam, and an optical recording medium driven by a recording medium drive controller. A third optical system that causes the plurality of light beams reflected by the beam splitter to enter a light detection unit; and reproduces information recorded on an optical recording medium based on an output signal obtained from the light detection unit. An information reproducing unit that configured to include a.
[0037]
An information recording / reproducing apparatus according to any one of claims 16 to 18 in the claims of the present application comprises: a recording medium drive control unit that drives an optical recording medium; a light source unit that emits a light beam; A polarizing beam splitter into which a light beam from the unit enters, a one-dimensional light modulator in which a plurality of reflection-type light modulators are linearly arranged, and a primary light beam from a light source unit transmitted through the polarizing beam splitter. A modulation control signal based on information to be recorded or a preset modulation control signal is supplied to the first optical system that enters the original light modulation unit and the plurality of reflective light modulation units of the one-dimensional light modulation unit. A modulation control signal transmitting unit and a plurality of reflection type light modulation means are modulated and reflected according to the modulation control signal in the plurality of reflection type light modulation means, or are obtained by being reflected without being modulated. The plurality of light beams that are arranged in accordance with the arrangement of the stages and transmitted through the first optical system and reflected by the polarization beam splitter are transmitted to an adjacent optical recording medium driven by a recording medium drive control unit. One of them is incident on the optical recording medium in a state of being close to or in contact with the other, and recording of information to be recorded on the optical recording medium is performed, or a plurality of light beams modulated according to the information recorded on the optical recording medium are optically recorded. A second optical system that can be obtained from the medium, a light detection unit that generates an output signal that changes according to a change in an incident light beam, and an optical recording medium that is driven by a recording medium drive control unit. And a third optical system for causing the plurality of light beams transmitted through the polarizing beam splitter to enter the light detection unit, and re-recording information recorded on the optical recording medium based on an output signal obtained from the light detection unit. An information reproducing unit that configured to include a.
[0038]
An information recording / reproducing apparatus according to any one of claims 19 to 21 in the claims of the present application comprises: a recording medium drive control unit that drives an optical recording medium; a light source unit that emits a light beam; A one-dimensional light modulating section in which reflective light modulating means are linearly arranged, a first optical system for causing a light beam from a light source section to enter the one-dimensional light modulating section, and a one-dimensional light modulating section. A modulation control signal transmitting unit that supplies a modulation control signal based on information to be recorded or a preset modulation control signal to a plurality of reflection type light modulation units; A plurality of light beams obtained by being modulated and reflected or reflected without being modulated and arranged in accordance with the arrangement of a plurality of reflective light modulating means are transmitted to a recording medium drive control unit. Driven by To the optical recording medium, the two adjacent ones are brought into close or mutual contact with each other, and the information to be recorded on the optical recording medium is recorded, or modulated according to the information recorded on the recording medium. A plurality of light beams obtained from the optical recording medium, a second optical system including a polarizing beam splitter, and a light detection unit that generates an output signal that changes in accordance with a change in the incident light beam; A third optical system that causes a plurality of light beams obtained from the optical recording medium driven by the recording medium drive control unit and that has passed through the polarization beam splitter included in the second optical system to enter the light detection unit; An information reproducing unit that reproduces information recorded on the optical recording medium based on an output signal obtained from the detecting unit.
[0039]
In the information recording apparatus according to any one of the first to tenth aspects of the present invention as described above, the light beam from the light source unit is formed by a plurality of light modulating means. A modulation control signal based on information to be recorded is supplied from a modulation control signal transmission unit to a plurality of light modulation units in the one-dimensional light modulation unit arranged in a matrix. . Then, from the one-dimensional light modulation section, a plurality of light beams modulated in accordance with a modulation control signal in a plurality of light modulation means arranged linearly and arranged in accordance with the arrangement arrangement of the plurality of light modulation means. Which are incident on the optical recording medium driven by the recording medium drive control unit in a state where two adjacent ones come close to or in contact with each other, whereby the information to be recorded on the optical recording medium is obtained. Is recorded, and information to be recorded on the optical recording medium is recorded with a plurality of recording tracks respectively corresponding to a plurality of light beams incident on the optical recording medium.
[0040]
As described above, a one-dimensional light modulation unit in which a plurality of light modulation units are linearly arranged is used, and a plurality of light beams modulated according to a modulation control signal based on information to be recorded are formed. An array arrangement corresponding to the arrangement arrangement of the plurality of light modulating means, that is, formed in an arrangement arrangement which is to be arranged substantially in a common plane, and these are formed on the optical recording medium driven by the recording medium drive control unit. Since it is assumed to be incident, non-contact information recording on an optical recording medium can be performed, and difficulty in setting and maintaining the positional relationship of a plurality of optical means for transmitting or reflecting a plurality of light beams is reduced. As a result, the utilization rates of the plurality of light beams are improved.
[0041]
Further, the recording of the information to be recorded on the optical recording medium is modulated according to a modulation control signal based on the information to be recorded, and the plurality of light beams to be substantially arranged in a common plane. Is incident on the optical recording medium, so that light spots arranged linearly on the optical recording medium are formed. Therefore, reproduction of information recorded on the optical recording medium is complicated signal. It can be performed relatively easily without any processing.
[0042]
In the information recording / reproducing apparatus described in claim 11 or claim 12 in the claims of the present application, the light beam from the first light source unit has a plurality of light modulating means arranged linearly. The modulation control signal based on the information to be recorded is supplied from the modulation control signal transmission unit to a plurality of light modulation units in the one-dimensional light modulation unit. Then, from the one-dimensional light modulation section, a plurality of light beams modulated in accordance with a modulation control signal in a plurality of light modulation means arranged linearly and arranged in accordance with the arrangement arrangement of the plurality of light modulation means. Which are incident on the optical recording medium driven by the recording medium drive control unit in a state where two adjacent ones come close to or in contact with each other, whereby the information to be recorded on the optical recording medium is obtained. Is recorded, and information to be recorded on the optical recording medium is recorded with a plurality of recording tracks respectively corresponding to a plurality of light beams incident on the optical recording medium.
[0043]
Further, the light beam from the second light source unit enters the optical recording medium driven by the recording medium drive control unit, is modulated according to the information recorded on the optical recording medium, and is guided to the light detection unit. . As a result, an output signal that changes according to a change in the light beam modulated according to the information recorded on the optical recording medium is obtained from the light detection unit, and the information reproduction unit outputs the output signal from the light detection unit. The information recorded on the optical recording medium is reproduced based on the information.
[0044]
As described above, the one-dimensional light modulation unit in which the plurality of light modulation units are linearly arranged is used, and the modulation control signal based on the information to be recorded based on the light beam from the first light source unit. A plurality of light beams modulated in accordance with the above are formed in an arrangement arrangement corresponding to the arrangement arrangement of the plurality of light modulation means, that is, an arrangement arrangement which will be arranged substantially in a common plane, and these are recorded. Since it is assumed that the light is incident on the optical recording medium driven by the medium drive control unit, non-contact information recording on the optical recording medium can be performed, and a plurality of optical means for transmitting or reflecting a plurality of light beams are provided. Difficulty in setting and maintaining the positional relationship is reduced, and the utilization of a plurality of light beams is improved.
[0045]
Further, the recording of the information to be recorded on the optical recording medium is modulated according to a modulation control signal based on the information to be recorded, and the plurality of light beams to be substantially arranged in a common plane. Is incident on the optical recording medium, so that light spots arranged linearly on the optical recording medium are formed. For example, the light beam from the second light source unit is The reproduction of information recorded on the optical recording medium, which is performed assuming that the light is incident on the optical recording medium driven by the drive control unit, can be performed relatively without the need for complicated signal processing in the information reproduction unit. It can be done easily.
[0046]
In the information recording / reproducing apparatus according to any one of claims 13 to 21 in the claims of the present application, recording of information on an optical recording medium and reproduction of information from the optical recording medium are performed by: This is performed using a common light source unit and a plurality of optical units.
[0047]
When recording information on an optical recording medium, a light beam from a light source unit is incident on a one-dimensional light modulation unit in which a plurality of reflective light modulation units are linearly arranged, and the one-dimensional light modulation is performed. A modulation control signal based on information to be recorded is supplied from a modulation control signal transmission unit to a plurality of reflection type light modulation means in the unit. Then, from the one-dimensional light modulation unit, the light is modulated and reflected in accordance with the modulation control signal in the plurality of reflective light modulating means arranged linearly, and according to the arrangement of the plurality of reflective light modulating means. A plurality of light beams arranged in an array are obtained, and these light beams are incident on the optical recording medium driven by the recording medium drive control unit in a state in which two adjacent ones come close to or contact with each other. Information to be recorded on the recording medium is recorded, and information to be recorded on the optical recording medium is recorded with a plurality of recording tracks respectively corresponding to a plurality of light beams incident on the optical recording medium.
[0048]
On the other hand, when reproducing information from an optical recording medium, a light beam from a light source unit is incident on a one-dimensional light modulation unit in which a plurality of reflective light modulation units are linearly arranged, and the primary A preset modulation control signal is supplied from a modulation control signal transmission unit to a plurality of reflection type light modulation units in the original light modulation unit. Then, from the one-dimensional light modulation unit, the light is reflected without being modulated by the plurality of reflective light modulating means arranged linearly, and the plurality of reflective light modulating means are arranged and arranged in accordance with the arrangement arrangement of the plurality of reflective light modulating means. Light beams are obtained, and they are incident on the optical recording medium driven by the recording medium drive control unit in a state in which two adjacent ones come close to or in contact with each other, and are thereby recorded on the optical recording medium. A plurality of light beams modulated according to the obtained information are obtained from the optical recording medium, and are guided to the light detection unit. As a result, an output signal that changes according to a change in the light beam modulated according to the information recorded on the optical recording medium is obtained from the light detection unit, and the information reproduction unit outputs the output signal from the light detection unit. The information recorded on the optical recording medium is reproduced based on the information.
[0049]
As described above, a one-dimensional light modulation unit including a plurality of reflection-type light modulation units arranged linearly is used, and a modulation control signal based on information to be recorded based on a light beam from a light source unit is used. A plurality of light beams modulated in response to the light, or a plurality of light beams not subjected to the modulation are arranged in accordance with the arrangement of the plurality of reflection-type light modulation means, that is, substantially in a common plane. The contactless recording of information on the optical recording medium or the optical recording medium And that the difficulty in setting and maintaining the positional relationship of a plurality of optical means for transmitting or reflecting a plurality of light beams can be reduced. The improvement of the utilization of a plurality of light beams is achieved.
[0050]
Further, the recording of the information to be recorded on the optical recording medium is modulated according to a modulation control signal based on the information to be recorded, and the plurality of light beams to be substantially arranged in a common plane. Is incident on the optical recording medium, so that light spots arranged linearly on the optical recording medium are formed. Therefore, the light spots are not subjected to modulation and are substantially in a common plane. The reproduction of information recorded on the optical recording medium, which is performed with the plurality of light beams to be arranged and arranged to be incident on the optical recording medium driven by the recording medium drive control unit, is performed by the information reproducing unit. Can be performed relatively easily without requiring complicated signal processing.
[0051]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a main part of an example of an information recording apparatus according to any one of the first to tenth aspects of the present invention. In the example shown in FIG. 1, a tape-shaped optical recording medium, that is, an optical tape is used as an optical recording medium, and information is recorded on the optical tape.
[0052]
In the example of the information recording apparatus shown in FIG. 1, a laser light source 21 constituting a light source unit that continuously emits a laser light beam is provided. A laser light beam emitted from a laser light source 21 is incident on a one-dimensional light modulation unit 23 by an optical system 22 including optical elements such as a plurality of lenses.
[0053]
As shown in FIG. 2, the one-dimensional light modulation unit 23 is configured such that reflection-type light modulators 25, which are a plurality of light modulation units, are linearly arranged on a flat support member 24 so that two adjacent ones are close to each other. It is assumed that. Each of the plurality of reflection type optical modulators 25 modulates and reflects the light beam incident thereon according to a modulation control signal supplied from the outside.
[0054]
In an example of the laser light source 21 and the optical system 22, for example, as shown in FIG. 3, the laser light source 21 is configured by a laser diode 30 that is a light emitting diode that emits a single laser light beam. The system 22 includes a cylindrical lens 31, a light beam collimating lens 32, and a condenser lens 33.
[0055]
In the example of the laser light source 21 and the optical system 22 shown in FIG. 3, the laser light beam from the laser diode 30 is incident on the cylindrical lens 31 and has an oval cross section by the cylindrical lens 31. Deformed into a light beam. Then, the laser light beam having an oblong cross section obtained from the cylindrical lens 31 is converted into a parallel beam by the light beam parallelizing lens 32 and is incident on the condenser lens 33, and is focused by the condenser lens 33. , One-dimensional light modulator 23.
[0056]
At this time, the laser light beam having an oval cross section incident on the one-dimensional light modulation unit 23 has a plurality of linearly arranged and arranged in the one-dimensional light modulation unit 23 with the long axis direction of the oval cross section. In the arrangement direction of the reflection type optical modulator 25. Accordingly, as shown in FIG. 4, the one-dimensional light modulator 23 irradiates the entirety of the plurality of reflective optical modulators 25 arranged linearly so as to irradiate an oval light spot with a laser light beam. 34 are formed.
[0057]
A modulation control signal transmission unit 35 is provided in association with the one-dimensional light modulation unit 23. The modulation control signal transmission unit 35 is supplied with a recording signal SS representing information to be recorded, and the modulation control signal transmission unit 35 responds to the recording signal SS with a plurality of modulation control signals based on the information to be recorded. The SMDs are formed and supplied to the plurality of reflection type optical modulators 25 in the one-dimensional light modulation unit 23, respectively. Thereby, as described above, each of the plurality of reflection type optical modulators 25 in the one-dimensional light modulation unit 23 has an oval shape which irradiates the entirety of the plurality of reflection type optical modulators 25 arranged linearly. The laser light beam that forms and enters the light spot 34 is modulated and reflected in accordance with the modulation control signal SMD from the modulation control signal transmission unit 35. The modulation of the laser light beam by each of the plurality of reflection-type light modulators 25 is performed by changing the amount of reflection of the incident laser light beam in accordance with the modulation control signal SMD.
[0058]
Further, in another example of the laser light source 21 and the optical system 22, for example, as shown in FIG. 5, the laser light source 21 is configured by a one-dimensional diode array 40 including a plurality of light emitting diodes. The optical system 22 includes a light beam collimating lens 41 and a condenser lens 42. As shown in FIG. 6, the one-dimensional diode array 40 is formed by providing a plurality of laser diodes 43 arranged linearly, and each of the plurality of laser diodes 43 continuously emits a single laser light beam. Emit to Accordingly, from the one-dimensional diode array 40, a plurality of laser diodes 43 arranged linearly according to the arrangement of the plurality of laser diodes 43, in other words, a plurality of laser diodes 43 arranged substantially in a common plane are arranged. Is emitted.
[0059]
In the example of the laser light source 21 and the optical system 22 shown in FIG. 5, a plurality of laser light beams arranged linearly from the one-dimensional diode array 40 are applied to the light beam collimating lens 41. Incident. Then, each of the plurality of laser light beams is converted into a parallel beam by a light beam parallelizing lens 41 and is incident on a condenser lens 42, and is converged by the condenser lens 42, so that the one-dimensional light modulator 23 It is assumed to be incident on.
[0060]
At this time, the plurality of laser light beams that are linearly arranged and incident on the one-dimensional light modulation unit 23 are aligned with the plurality of reflection-type light modulations that are linearly arranged and arranged in the one-dimensional light modulation unit 23. And is incident on the plurality of reflection type optical modulators 25. As a result, as shown in FIG. 7, the one-dimensional light modulator 23 irradiates the plurality of reflective light modulators 25 arranged linearly, thereby forming a plurality of light spots by a plurality of laser light beams. 44 are formed.
[0061]
Under such circumstances, a plurality of modulation control signals SMD based on information to be recorded from a modulation control signal transmission unit 35 are supplied to a plurality of reflection type optical modulators 25 in the one-dimensional light modulation unit 23, respectively. Accordingly, each of the plurality of reflection-type light modulators 25 in the one-dimensional light modulation unit 23 irradiates the plurality of reflection-type light modulators 25 linearly arranged as described above. Each of the plurality of laser light beams that enter and form the spot 44 is modulated and reflected in accordance with the modulation control signal SMD from the modulation control signal transmission unit 35. In such a case, the modulation of the laser beam by each of the plurality of reflection type optical modulators 25 is also performed by changing the amount of reflection of the incident laser beam in accordance with the modulation control signal SMD.
[0062]
In the information recording apparatus shown in FIG. 1 including the laser light source 21 and the optical system 22 and the one-dimensional light modulation unit 23 as described above, the information recording device is linearly arranged from the one-dimensional light modulation unit 23. In each of the plurality of reflection type optical modulators 25, a plurality of laser light beams (modulated laser light beams) which are modulated and reflected in accordance with the modulation control signal SMD from the modulation control signal transmission unit 35 are converted into a plurality of reflection type light beams. The modulators 25 are linearly arranged in accordance with the arrangement of the modulators 25, in other words, they are substantially arranged in a common plane. The plurality of modulated laser light beams arranged linearly from the one-dimensional light modulation unit 23 travel through an optical system 45 that performs light beam control and are driven by a recording medium drive control unit 46 to travel. Is incident on the optical tape 47.
[0063]
The optical system 45 that performs the light beam control is configured such that the two modulated laser light beams arranged linearly from the one-dimensional light modulation unit 23 are in a state where two adjacent ones are close to or in contact with each other, ie, two adjacent two A focus for causing the optical tape 47 to enter the optical tape 47 with a very small or substantially no gap therebetween, and for allowing each of the plurality of modulated laser light beams incident on the optical tape 47 to have an appropriate focusing state on the optical tape 47 Control and tracking control for causing each of the plurality of modulated laser light beams incident on the optical tape 47 to enter an appropriate position on the optical tape 47 are performed. Thus, a state in which information to be recorded on the optical tape 47 is recorded by the plurality of modulated laser light beams.
[0064]
The recording of information on the optical tape 47 by such a plurality of modulated laser light beams is performed by entering the optical tape 47 onto the optical tape 47, each extending along the running direction of the optical tape 47, as shown in FIG. .., CHn corresponding to the number n (for example, 8) of modulated laser light beams to be formed. Each of the plurality of recording tracks CH1 to CHn has a recording pattern corresponding to the modulation state of the modulated laser light beam corresponding thereto.
[0065]
When information is recorded on the optical tape 47 by using such a plurality of modulated laser light beams, the arrangement direction of the plurality of modulated laser light beams that are linearly arranged and incident on the optical tape 47 is the same as that of the optical tape 47. It is set as taking a predetermined angle with respect to the traveling direction. FIG. 9 shows a case where the arrangement direction of a plurality of modulated laser light beams linearly arranged and incident on the optical tape 47 is orthogonal to the running direction of the optical tape 47 indicated by the arrow X. FIG. 10 shows the relationship between a plurality of light spots Z formed by a plurality of modulated laser light beams on the optical tape 47 and a plurality of recording tracks CH1 to CHn. In the case where the arrangement direction of the plurality of modulated laser light beams arranged at an angle γ with respect to the running direction of the optical tape 47 represented by the arrow X, the plurality of modulated laser light beams The relationship between a plurality of light spots Z formed by beams and a plurality of recording tracks CH1 to CHn is shown.
[0066]
As shown in FIG. 9, when the arrangement direction of a plurality of modulated laser light beams linearly arranged and incident on the optical tape 47 is orthogonal to the running direction of the optical tape 47, Information recorded with a plurality of recording tracks CH1 to CHn has no phase difference between recording tracks. On the other hand, as shown in FIG. 10, the arrangement direction of a plurality of modulated laser light beams that are linearly arranged and incident on the optical tape 47 forms an angle γ with the running direction of the optical tape 47. In this case, the information recorded on the plurality of recording tracks CH1 to CHn has a constant phase difference between the recording tracks according to the angle γ.
[0067]
In the example of the information recording apparatus shown in FIG. 1 as described above, the one-dimensional light modulator 23 is used, and a plurality of lasers modulated in accordance with the modulation control signal SMD based on the information to be recorded. Since the light beams are formed in a linear arrangement, i.e., an arrangement that will be arranged in a substantially common plane, and they are incident on the optical tape 47, there is no Contact information recording can be performed, and the difficulty in setting and maintaining the positional relationship of a plurality of optical means for transmitting or reflecting a plurality of laser light beams can be reduced. The utilization rate is improved.
[0068]
FIG. 11 shows a main part of an example of an information recording / reproducing apparatus according to the invention described in claim 11 or claim 12 of the present application. The example of the information recording / reproducing apparatus shown in FIG. 11 uses a tape-shaped optical recording medium, that is, an optical tape as an optical recording medium, and records and reproduces information on and from the optical tape.
[0069]
In the example of the information recording / reproducing apparatus shown in FIG. 11, an information recording unit 50 and an information reproducing unit 51 are provided, and the information recording unit 50 is driven by the recording medium drive control unit 52 to travel. Information is recorded on the optical tape 53, and the information recorded on the optical tape 53 is reproduced by the information reproducing unit 51 from the optical tape 53 that is driven and driven by the recording medium drive control unit 52.
[0070]
The information recording unit 50 has the same configuration as the main part of an example of the information recording device according to the invention described in any one of claims 1 to 10 in the claims of the present application shown in FIG. In FIG. 11, each part and each signal in the information recording unit 50 are denoted by the same reference numerals as the corresponding parts and signals in the main part of the example of the information recording apparatus shown in FIG. , And redundant description thereof will be omitted.
[0071]
The information reproducing unit 51 includes a laser light source 55 that forms a light source unit that continuously emits a laser beam. The laser light source 55 is configured using a one-dimensional diode array 40 formed by providing a plurality of laser diodes 43 arranged linearly as shown in FIG. In such a case, the laser light sources 55 are arranged linearly according to the arrangement of the plurality of laser diodes 43, in other words, are arranged substantially in a common plane. A plurality of laser light beams are emitted.
[0072]
A plurality of laser light beams from the laser light source 55 are incident on an optical tape 53 that is driven by the recording medium drive control unit 52 and travels through an optical system 56 that performs light beam control. On the optical tape 53, for example, information is recorded by the information recording unit 50, and for example, a plurality of recording tracks CH1 to CHn each having information recorded thereon are similar to those on the optical tape 47 shown in FIG. Is formed.
[0073]
The optical system 56 for controlling the light beam controls the plurality of laser light beams arranged linearly from the laser light source 55 in a state where two adjacent ones are close to or in contact with each other, that is, the gap between the two adjacent ones is Focus control for causing the laser beam to enter the optical tape 53 as a very small or substantially absent state, and for each of the plurality of laser light beams entering the optical tape 53 to assume an appropriate focusing state on the optical tape 53; Tracking control is performed so that the incident positions of the plurality of laser light beams incident on the optical tape 53 properly match the plurality of recording tracks CH1 to CHn formed on the optical tape 53, respectively.
Each of the plurality of laser light beams whose incident positions correspond to the plurality of recording tracks CH1 to CHn formed on the optical tape 53 is recorded on each of the plurality of recording tracks CH1 to CHn. While being modulated according to the information, the light is reflected on each of the plurality of recording tracks CH1 to CHn, and travels toward the optical system 57 including a plurality of optical elements. The optical system 57 causes a plurality of laser light beams modulated according to the information recorded on the optical tape 53 from the optical tape 53 to be incident on the light detection unit 58.
[0075]
The light detection unit 58 obtains a plurality of output signals SIN, each of which changes in accordance with a change in each of the plurality of laser light beams incident through the optical system 57, and supplies them to the information reproduction unit 59. The information reproducing unit 59 reproduces information recorded on the optical tape 53 based on a plurality of output signals SIN from the light detecting unit 58.
[0076]
In the information reproducing section 51 in the example of the information recording / reproducing apparatus shown in FIG. 11, the laser light source 55 is configured by using the one-dimensional diode array 40, and is arranged linearly. Although a plurality of laser light beams are emitted, the laser light source 55 may emit a single laser light beam instead of a plurality of laser light beams. In such a case, the laser light beam incident on the optical tape 53 through the optical system 56 is converted into a single laser light beam, thereby, for example, reproducing information recorded on the optical tape 53 with a plurality of recording tracks. Are sequentially performed.
[0077]
Even in the example of the information recording / reproducing apparatus shown in FIG. 11 as described above, the information recording unit 50 uses the one-dimensional light modulation unit 23 to respond to the modulation control signal SMD based on the information to be recorded. Are formed in a linear array, that is, an array that is to be arranged in a substantially common plane, and these are incident on the optical tape 53. Therefore, non-contact information recording on the optical tape 53 can be performed, and the difficulty in setting and maintaining the positional relationship of a plurality of optical means for transmitting or reflecting a plurality of laser light beams is reduced. At the same time, the utilization rates of the plurality of light beams are improved. In the information reproducing unit 51, information to be reproduced from the optical tape 53 is modulated according to a modulation control signal SMD based on the information to be recorded, and a plurality of laser light beams arranged linearly are arranged. Therefore, the information recorded on the optical tape 53 can be relatively easily reproduced without requiring complicated signal processing.
[0078]
FIG. 12 shows a main part of an example of an information recording / reproducing apparatus according to any one of claims 13 to 15 of the present application. The information recording / reproducing apparatus shown in FIG. 12 also uses a tape-shaped optical recording medium, that is, an optical tape as an optical recording medium, and records and reproduces information on and from the optical tape.
[0079]
In the example of the information recording / reproducing apparatus shown in FIG. 12, a laser light source 61 forming a light source unit that continuously emits a laser light beam, and a plurality of laser light beams emitted from the laser light source 61 are incident. An optical system 62 including an optical element such as a lens is provided. The laser light source 61 and the optical system 62 are the same as the laser light source 21 and the optical system 22 in the example of the information recording apparatus shown in FIG. 1 described above. For example, the laser light source 61 is the laser diode 30 shown in FIG. The optical system 62 includes a cylindrical lens 31, a light beam collimating lens 32, and a condenser lens 33 shown in FIG. 3, and a laser beam having an elliptical cross section from the optical system 62. The one from which the beam is derived or, for example, the laser light source 61 is constituted by the one-dimensional diode array 40 shown in FIG. 5, and the optical system 62 is composed of the light beam collimating lens 41 and the condenser lens shown in FIG. 42, and arranged linearly from the optical system 62, in other words, arranged substantially in a common plane. It is a plurality of laser light beams to be as is derived.
[0080]
The laser light beam derived from the optical system 62 enters the polarization beam splitter 63, reflects downward in FIG. 12 at the polarization beam splitter 63, passes through the 波長 wavelength plate 64, and passes through the condenser lens 65. Incident on. The condenser lens 65 condenses the laser light beam that has passed through the 波長 wavelength plate 64 onto the one-dimensional light modulator 66.
[0081]
The one-dimensional light modulator 66 is the same as the one-dimensional light modulator 23 in the example of the information recording device shown in FIG. Then, for example, the one-dimensional light modulator 23 shown in FIG. 2 is configured such that a reflection type light modulator 25 as a plurality of light modulation means is linearly arranged on a flat support member 24 as two adjacent ones are adjacent to each other. Similarly to the arrangement, the one-dimensional light modulator 66 includes a plurality of light modulating means, such as a reflection type light modulator 25, on a flat support member corresponding to the flat support member 24. The corresponding reflection type optical modulators are arranged linearly as two adjacent ones are close to each other.
[0082]
Depending on the configuration of the laser light source 61 and the optical system 62, the laser light beam incident on the one-dimensional light modulation unit 66 is, for example, a single laser light beam having an oval cross section or a linear laser light beam. A plurality of laser light beams arranged and arranged, in other words, substantially arranged in a common plane.
[0083]
When the laser light beam incident on the one-dimensional light modulation unit 66 is a single laser light beam having an elliptical cross section, the single laser light beam is emitted in the major axis direction of the oval cross section. Are aligned with the arrangement direction of the plurality of reflective light modulators arranged linearly in the one-dimensional light modulation unit 66. Thereby, similarly to the case of the one-dimensional light modulation unit 23 shown in FIG. 4, the one-dimensional light modulation unit 66 irradiates the whole of the plurality of reflection type light modulators arranged linearly. An oval light spot is formed by the laser light beam.
[0084]
Further, the laser light beams incident on the one-dimensional light modulation section 66 are composed of a plurality of laser light beams arranged linearly, in other words, a plurality of laser light beams arranged substantially in a common plane. In some cases, the plurality of laser light beams are arranged in a state where their arrangement directions coincide with the arrangement directions of the plurality of reflective light modulators arranged linearly in the one-dimensional light modulation unit 66, and The light enters each of the reflection type optical modulators. Thereby, similarly to the case of the one-dimensional light modulation unit 23 shown in FIG. 7, the one-dimensional light modulation unit 66 irradiates a plurality of reflection type light modulators arranged linearly, respectively. A plurality of light spots are formed by the plurality of laser light beams.
[0085]
A modulation control signal transmission section 67 is provided in association with the one-dimensional light modulation section 66, and the modulation control signal transmission section 67 is supplied with a recording signal SS representing information to be recorded. Under such a circumstance, the modulation control signal transmitting unit 67 is configured to form a plurality of modulation control signals SMD based on the information to be recorded according to the recording signal SS, or irrespective of the recording signal SS, A state in which a plurality of set modulation control signals SNM are formed is set, and a plurality of modulation control signals SMD or a plurality of modulation control signals SNM are arranged in a one-dimensional light modulation unit 66 in a plurality of reflection type lights arranged linearly. Each is supplied to a modulator.
[0086]
Accordingly, when the plurality of reflection type optical modulators in the one-dimensional light modulation unit 66 are supplied with the plurality of modulation control signals SMD based on the information to be recorded from the modulation control signal transmission unit 67, as described above. A laser light beam that forms and enters an oblong light spot that irradiates the entirety of a plurality of reflective light modulators arranged linearly, or a plurality of reflective light lights arranged linearly A plurality of laser light beams which form and enter a plurality of light spots respectively irradiating the modulator are modulated and reflected according to the modulation control signal SMD. The modulation of the laser light beam by each of the plurality of reflection type optical modulators is performed by changing the amount of reflection of the incident laser light beam according to the modulation control signal SMD.
[0087]
Further, when a plurality of preset modulation control signals SNM are supplied from the modulation control signal transmission unit 67, each of the plurality of reflection type optical modulators in the one-dimensional light modulation unit 66 has a linear shape as described above. A laser light beam that forms an oblong light spot that irradiates the entirety of a plurality of reflective optical modulators arranged in a matrix, or a plurality of reflective optical modulators that are linearly arranged. A plurality of laser light beams, which form a plurality of light spots to be irradiated and are incident, are reflected with a constant reflection amount without being modulated.
[0088]
As a result, from the one-dimensional light modulator 66, a plurality of laser beams modulated and reflected in accordance with the modulation control signal SMD by a plurality of reflective optical modulators linearly arranged on the common plane portion, respectively. The beam or the plurality of laser light beams reflected without being modulated by the plurality of reflection type optical modulators arranged two-dimensionally on the common plane portion are arranged in the arrangement of the plurality of reflection type optical modulators. , In other words, substantially arranged in a common plane, and is led out toward the condenser lens 65.
[0089]
The plurality of laser light beams obtained from the one-dimensional light modulator 66 pass through the condenser lens 65 and the 波長 wavelength plate 64 and enter the polarization beam splitter 63. Since the plurality of laser light beams incident on the polarization beam splitter 63 and obtained from the one-dimensional light modulator 66 have reciprocated through the quarter-wave plate 64, the optical system incident on the polarization beam splitter 63. The polarization plane is rotated by 90 ° as compared with the laser beam from the laser beam 62, and transmits through the polarization beam splitter 63. The plurality of laser light beams transmitted through the polarizing beam splitter 63 pass through a quarter-wave plate 68, travel through an optical system 69 for controlling a light beam, and are driven by a recording medium drive control unit 70 to travel. The light enters the optical tape 71 as a medium.
[0090]
The optical system 69 that performs light beam control is a state in which a plurality of laser light beams emitted from the one-dimensional light modulation unit 66 and arranged linearly are in a state where two adjacent ones are close to or in contact with each other, that is, two adjacent two Focus control for causing the optical tape 71 to enter the optical tape 71 in a state where the gap between them is extremely small or substantially non-existent, and for setting a proper focusing state on the optical tape 71 for each of the plurality of laser light beams incident to the optical tape 71 Then, tracking control for causing each of the plurality of laser light beams incident on the optical tape 71 to enter an appropriate position on the optical tape 71 is performed.
[0091]
In this manner, when the plurality of laser light beams incident on the optical tape 71 are modulated and reflected by the one-dimensional light modulation unit 66 in accordance with the modulation control signal SMD, the modulation control signal SMD Information to be recorded on the optical tape 71 is recorded by the plurality of laser light beams modulated accordingly.
[0092]
On the other hand, when the plurality of laser light beams incident on the optical tape 71 are reflected without being modulated by the one-dimensional light modulation unit 66, the information is recorded on the optical tape 71 with a plurality of recording tracks. The plurality of laser light beams are appropriately incident on the plurality of recording tracks by the optical system 69 that performs light beam control.
[0093]
Each of the plurality of laser light beams incident on the plurality of recording tracks formed on the optical tape 71 undergoes modulation according to the information recorded on each of the plurality of recording tracks, and performs a plurality of recording. The light is reflected at each of the tracks and is obtained toward the optical system 69. In this way, the plurality of laser light beams obtained from the optical tape 71 pass through the optical system 69 and the quarter-wave plate 68 and enter the polarization beam splitter 63. Since the plurality of laser light beams incident on the polarization beam splitter 63 and obtained from the optical tape 71 have passed back and forth through the quarter-wave plate 68, the one-dimensional light modulator incident on the polarization beam splitter 63 The polarization plane is rotated by 90 ° as compared with the plurality of laser light beams from the laser beam 66 and is reflected rightward in FIG. 12 by the polarization beam splitter 63.
[0094]
The plurality of laser light beams reflected by the polarization beam splitter 63 are incident on the light beam splitter 72, and a part of the laser light beams is reflected downward by the light beam splitter 72 in FIG. 12 and passes through an optical element 73 such as a cylindrical lens. The light enters the focus / tracking detection unit 74, and another part of the light passes through the light beam splitter 72 and enters the light detection unit 76 through an optical element 75 such as a condenser lens.
[0095]
The focus / tracking detection unit 74 outputs an output signal SF indicating a focus state and an output signal indicating a tracking state for the plurality of laser light beams incident on the optical tape 71 in accordance with the plurality of laser light beams incident through the optical element 73. Send ST. These output signals SF and ST are used for focus control and tracking control for each of a plurality of laser light beams incident on the optical tape 71 in the optical system 69 for performing beam control.
[0096]
In addition, the light detection unit 76 obtains a plurality of output signals SIN, each of which changes in accordance with a change in each of the plurality of laser light beams incident through the optical element 75, and supplies them to the information reproducing unit 77. The information reproducing unit 77 reproduces information recorded on the optical tape 71 based on a plurality of output signals SIN from the light detecting unit 76.
[0097]
In such an example of the information recording / reproducing apparatus shown in FIG. 12, when information to be recorded on the optical tape 71 is recorded, a plurality of information based on the information to be recorded from the modulation control signal transmitting section 67 are provided. The modulation control signals SMD are sent out and supplied to the plurality of reflection type optical modulators in the one-dimensional light modulation section 66, respectively. Thereby, the plurality of laser light beams modulated and reflected by the one-dimensional light modulation unit 66 in accordance with the modulation control signal SMD in the plurality of reflection type light modulators arranged linearly on the common plane portion, respectively. Are obtained toward the condenser lens 65.
[0098]
A plurality of laser light beams modulated in accordance with the modulation control signal SMD obtained from the one-dimensional light modulation unit 66 pass through a condenser lens 65, a 波長 wavelength plate 64, a polarization beam splitter 63, and a 波長 wavelength plate 68. Then, the light reaches the optical system 69 that performs beam control, and enters the optical tape 71 under the focus control and tracking control by the optical system 69. As a result, information to be recorded is recorded on the optical tape 71 by a plurality of laser light beams modulated according to the modulation control signal SMD, and information to be recorded is recorded on the optical tape 71. A plurality of recorded recording tracks are formed.
[0099]
The recording of information on the optical tape 71 is incident on the optical tape 71, each of which extends along the running direction of the optical tape 71, on the optical tape 71, similarly to the case of the optical tape 47 shown in FIG. .., CHn are formed according to the number n of the modulated laser light beams. Each of the plurality of recording tracks CH1 to CHn has a recording pattern corresponding to the modulation state of the corresponding laser light beam.
[0100]
When information is recorded on the optical tape 71 by a plurality of laser light beams modulated according to the modulation control signal SMD, a plurality of laser light beams arranged linearly and incident on the optical tape 71 are recorded. The arrangement direction is set at a predetermined angle with respect to the running direction of the optical tape 71. For example, when the arrangement direction of a plurality of laser light beams arranged linearly and incident on the optical tape 71 is set to be orthogonal to the running direction of the optical tape 71, the plurality of recording tracks CH1 to CHn Is recorded with no phase difference between recording tracks. On the other hand, when the arrangement direction of the plurality of laser light beams linearly arranged and incident on the optical tape 71 is set to form a specific angle with respect to the traveling direction of the optical tape 71, a plurality of Information recorded on the recording tracks CH1 to CHn has a constant phase difference between recording tracks corresponding to a specific angle.
[0101]
On the other hand, in the example of the optical tape recording / reproducing apparatus shown in FIG. 12, when reproducing the information recorded on the optical tape 71, a plurality of modulation control signals SNM set in advance from the modulation control signal transmitting section 67 are set. And these are supplied to a plurality of reflection type optical modulators in the one-dimensional optical modulation section 66, respectively. Thereby, the plurality of laser light beams reflected from the one-dimensional light modulation unit 66 with a constant reflection amount without being modulated in the plurality of reflection type light modulators linearly arranged on the common plane portion. Are obtained toward the condenser lens 65.
[0102]
A plurality of unmodulated laser light beams obtained from the one-dimensional light modulator 66 pass through a condenser lens 65, a 波長 wavelength plate 64, a polarization beam splitter 63, and a 波長 wavelength plate 68 to perform beam control. The light reaches the optical system 69 and enters the optical tape 71 under the focus control and the tracking control by the optical system 69. In such a case, the optical tape 71 includes a plurality of parallel recording tracks CH1, CH2, CH3,... Extending in the running direction of the optical tape 71, similar to the optical tape 47 shown in FIG. ., CHn are formed as information recorded on each of them. The optical system 69 that performs light beam control makes the incident positions of the plurality of laser light beams on the optical tape 71 properly match the plurality of recording tracks CH1, CH2, CH3,..., CHn. You.
[0103]
.., CHn formed on the optical tape 71, respectively, and a plurality of laser light beams, each of which has a plurality of recording tracks CH1, CH2, CH3,. , CH2, CH3,..., CHn, are modulated and reflected in accordance with the information recorded therein, and are obtained from the optical tape 71 toward the optical system 69. The plurality of laser light beams modulated according to the information recorded on the optical tape 71 obtained from the optical tape 71 pass through the optical system 69 and the 波長 wavelength plate 68, are reflected by the polarization beam splitter 63, and The beam splitter 72 splits the light into the focus / tracking detection unit 74 through the optical element 73 and splits the light into the light detection unit 76 through the optical element 75.
[0104]
As a result, an output signal SF indicating the focus state and an output signal ST indicating the tracking state with respect to the plurality of laser light beams incident on the optical tape 71 are obtained from the focus / tracking detection unit 74. From this, a plurality of output signals SIN that change in accordance with respective changes of a plurality of laser light beams modulated in accordance with information recorded on the optical tape 71 are obtained, and are supplied to the information reproducing unit 77. You. As a result, the information recorded on the optical tape 71 is reproduced in the information reproducing unit 77 based on the plurality of output signals SIN from the light detecting unit 76.
[0105]
In the example of the information recording / reproducing apparatus shown in FIG. 12 as described above, a one-dimensional light modulation unit 66 is used to modulate a plurality of signals modulated in accordance with a modulation control signal SMD based on information to be recorded. Since the laser light beams are formed in a linear arrangement, ie, an arrangement that will be arranged in a substantially common plane, and they are intended to be incident on the optical tape 71, Non-contact information recording can be performed, and the difficulty in setting and maintaining the positional relationship between a plurality of optical means for transmitting or reflecting a plurality of laser light beams can be reduced. Utilization rate is improved. Further, the information to be reproduced from the optical tape 71 is recorded on the optical tape 71 by a plurality of laser light beams which are modulated according to a modulation control signal based on the information to be recorded and are arranged in a line. Therefore, reproduction of information recorded on the optical tape 71 can be performed relatively easily without requiring complicated signal processing.
[0106]
FIG. 13 shows a main part of an example of an information recording / reproducing apparatus according to the invention described in any one of claims 16 to 18 of the present application. The information recording / reproducing apparatus shown in FIG. 13 also uses a tape-shaped optical recording medium, that is, an optical tape as an optical recording medium, and records and reproduces information on and from the optical tape.
[0107]
A main part of an example of the information recording / reproducing apparatus shown in FIG. 13 is an information recording / reproducing apparatus according to any one of claims 13 to 15 in the claims of the present application shown in FIG. In FIG. 13, each part and signal of the main part of an example of the information recording / reproducing apparatus shown in FIG. 13 are used for the information recording / reproducing shown in FIG. Corresponding parts and signals in the main part of an example of the apparatus are denoted by the same reference numerals, and redundant description thereof will be omitted.
[0108]
The example of the information recording / reproducing apparatus shown in FIG. 13 is different from the example of the information recording / reproducing apparatus shown in FIG. 12 in that the polarization characteristics of the polarizing beam splitter 63, the 波長 wavelength plate 64, the condenser lens 65, the one-dimensional A part including the light modulator 66 and the modulation control signal transmitter 67 and a part including the light beam splitter 72, the optical element 73, the focus / tracking detector 74, the optical element 75, the light detector 76, and the information reproducing unit 77. And the arrangement relationship is different.
[0109]
In the example of the information recording / reproducing apparatus shown in FIG. 13, the laser beam emitted from the laser light source 61 and incident on the polarization beam splitter 63 through the optical system 62 passes through the polarization beam splitter 63 and proceeds. , １ ／ wavelength plate 64 and a condenser lens 65 to enter a one-dimensional light modulator 66. Also, from the one-dimensional light modulator 66, in the plurality of reflective light modulators arranged linearly in the one-dimensional light modulator 66, a plurality of reflected light modulators modulated and reflected according to information to be recorded. A laser light beam or a plurality of laser light beams reflected with a constant reflection amount without being modulated by the one-dimensional light modulation unit 66 enter the polarization beam splitter 63 through the condenser lens 65 and the 波長 wavelength plate 64. Then, the light is reflected upward in FIG. 13 by the polarization beam splitter 63 and is incident on the optical tape 71 through the 波長 wavelength plate 68 and the optical system 69 for performing beam control.
[0110]
Further, a plurality of laser light beams modulated according to the information recorded on the optical tape 71 from the optical tape 71 enter the polarization beam splitter 63 through the optical system 69 and the quarter-wave plate 68, and The light passes through the splitter 63 and enters the light beam splitter 72, and a part of the light is reflected by the light beam splitter 72 to the left in FIG. 13 and enters the focus / tracking detection unit 74 through the optical element 73. The other part of the light passes through the light beam splitter 72 and enters the light detection unit 76 through the optical element 75.
[0111]
Under these circumstances, the operations of the one-dimensional light modulation unit 66, the modulation control signal transmission unit 67, the optical system 69, the focus / tracking detection unit 74, the information reproduction unit 77, and the like correspond to the information recording shown in FIG. This is the same as in the case of the playback device. Therefore, the effect obtained by the example of the information recording / reproducing apparatus shown in FIG. 13 is the same as that of the example of the information recording / reproducing apparatus shown in FIG.
[0112]
FIG. 14 shows a main part of an example of an information recording / reproducing apparatus according to the invention described in any one of claims 19 to 21 in the claims of the present application. The example of the information recording / reproducing apparatus shown in FIG. 14 also uses a tape-shaped optical recording medium, that is, an optical tape as an optical recording medium, and records and reproduces information on and from the optical tape.
[0113]
The main part of an example of the information recording / reproducing apparatus shown in FIG. 14 is also the information recording / reproducing apparatus according to any one of claims 13 to 15 in the claims of the present application shown in FIG. In FIG. 14, each part and signal of the main part of an example of the information recording / reproducing apparatus shown in FIG. 14 are used for the information recording / reproducing shown in FIG. Corresponding parts and signals in the main part of an example of the apparatus are denoted by the same reference numerals, and redundant description thereof will be omitted.
[0114]
In the example of the information recording / reproducing apparatus shown in FIG. 14, a laser light beam emitted from a laser light source 61 and passing through an optical system 62 directly enters a one-dimensional light modulation unit 66. The laser light beam directly incident on the one-dimensional light modulation unit 66 from the optical system 62 may be, for example, a single laser light beam having an oval cross section according to the configuration of the laser light source 61 and the optical system 62. Or, a plurality of laser light beams arranged linearly, in other words, substantially arranged in a common plane.
[0115]
When the laser light beam incident on the one-dimensional light modulation unit 66 is a single laser light beam having an oval cross section, the single laser light beam has a length of the oval cross section. The axial direction coincides with the arrangement direction of the plurality of reflective light modulators arranged linearly in the one-dimensional light modulation unit 66. Thereby, in the one-dimensional light modulation section 66, an oval light spot is formed by the laser light beam so as to irradiate the whole of the plurality of reflection type light modulators arranged linearly.
[0116]
Further, the laser light beams incident on the one-dimensional light modulation section 66 are composed of a plurality of laser light beams arranged linearly, in other words, a plurality of laser light beams arranged substantially in a common plane. In some cases, the plurality of laser light beams are arranged in a state where their arrangement directions coincide with the arrangement directions of the plurality of reflective light modulators arranged linearly in the one-dimensional light modulation unit 66, and The light enters the reflection type optical modulator. Thereby, in the one-dimensional light modulation unit 66, a plurality of light spots are formed by the plurality of laser light beams so as to irradiate the plurality of reflective light modulators arranged linearly.
[0117]
Thereby, each of the plurality of reflection type optical modulators in the one-dimensional light modulation unit 66 is linearly supplied with the plurality of modulation control signals SMD based on the information to be recorded from the modulation control signal transmission unit 67. A laser light beam that forms and enters an oblong light spot that irradiates the entire arrangement of a plurality of reflective optical modulators, or irradiates a plurality of reflective optical modulators that are linearly arranged A plurality of laser light beams that form and enter a plurality of light spots are modulated and reflected according to the modulation control signal SMD.
[0118]
Further, each of the plurality of reflection type optical modulators in the one-dimensional light modulation section 66 is linearly arranged when a plurality of preset modulation control signals SNM are supplied from the modulation control signal transmission section 67. A laser light beam that forms and enters an oblong light spot that irradiates the entirety of a plurality of reflective light modulators, or a plurality of light spots that irradiates a plurality of reflective light modulators arranged linearly Are formed and reflected with a constant reflection amount without modulation.
[0119]
As a result, from the one-dimensional light modulator 66, a plurality of laser beams modulated and reflected in accordance with the modulation control signal SMD by a plurality of reflective optical modulators linearly arranged on the common plane portion, respectively. The beams or the plurality of laser light beams reflected without being modulated by the plurality of reflection type optical modulators arranged linearly on the common plane portion thereof are arranged in the arrangement arrangement of the plurality of reflection type optical modulators. Accordingly, it is obtained as being linearly arranged, in other words, as being substantially arranged in a common plane, and is led out toward the condenser lens 65.
[0120]
Other configurations and operations in the example of the information recording / reproducing apparatus shown in FIG. 14 are the same as those in the example of the information recording / reproducing apparatus shown in FIG. Therefore, the effect obtained by the example of the information recording / reproducing apparatus shown in FIG. 14 is the same as that of the example of the information recording / reproducing apparatus shown in FIG.
[0121]
As is apparent from the above description, in the information recording apparatus according to any one of the first to tenth aspects of the present invention, a plurality of light modulating means are provided by a line. A plurality of light beams modulated in accordance with a modulation control signal based on information to be recorded are used in accordance with the arrangement of a plurality of light modulating means, using a one-dimensional light modulation unit arranged in an array. The optical recording medium is formed in an arrangement arrangement, that is, an arrangement arrangement that is to be arranged in a substantially common plane, and is incident on the optical recording medium driven by the recording medium drive control unit. It is possible to perform non-contact information recording on, and, furthermore, difficulties in setting and maintaining the positional relationship of a plurality of optical means for transmitting or reflecting a plurality of light beams are reduced, Improved utilization of the number of light beams is achieved.
[0122]
Further, the recording of the information to be recorded on the optical recording medium is modulated according to a modulation control signal based on the information to be recorded, and the plurality of light beams to be substantially arranged in a common plane. Is incident on the optical recording medium, and is performed under the condition that light spots arranged linearly on the optical recording medium are formed, whereby the optical beam is driven by the recording medium drive control unit. When the information recorded on the optical recording medium is reproduced by being assumed to be incident on the optical recording medium, the reproduction of the information from the optical recording medium can be performed relatively easily without requiring complicated signal processing. become.
[0123]
In the information recording / reproducing apparatus according to claim 11 or claim 12 in the claims of the present application, a one-dimensional modulator in which a plurality of light modulating means are linearly arranged is used, Based on the light beam from the first light source unit, the plurality of light beams modulated in accordance with the modulation control signal based on the information to be recorded are arranged in accordance with the arrangement of the plurality of light modulating units, that is, Non-contact information recording on the optical recording medium is formed because they are formed with an arrangement that is to be disposed substantially in the common plane and are incident on the optical recording medium driven by the recording medium drive control unit. And the difficulty in setting and maintaining the positional relationship of the plurality of optical means for transmitting or reflecting the plurality of light beams is reduced, and the plurality of light beams Improvement of utilization can be achieved.
[0124]
Further, the recording of the information to be recorded on the optical recording medium is modulated according to a modulation control signal based on the information to be recorded, and the plurality of light beams to be substantially arranged in a common plane. Is incident on the optical recording medium, thereby forming a linearly arranged light spot on the optical recording medium, thereby performing, for example, a light beam from the second light source unit. Reproduction of information recorded on the optical recording medium, which is performed by being incident on the optical recording medium driven by the medium drive control unit, is performed relatively easily without requiring complicated signal processing. You will get.
[0125]
In the information recording / reproducing apparatus according to any one of claims 13 to 21 in the claims of the present application, the one-dimensional light comprising a plurality of reflective light modulating means arranged linearly. A plurality of light beams that are modulated by a modulation unit in accordance with a modulation control signal based on information to be recorded based on a light beam from a light source unit, or a plurality of light beams that are not subjected to modulation. The beams are formed in an arrangement corresponding to the arrangement of the plurality of reflection-type light modulation means, that is, in an arrangement that is to be arranged substantially in a common plane, and they are driven by the recording medium drive control unit. Therefore, it is possible to perform non-contact information recording on the optical recording medium or non-contact information reproduction from the optical recording medium, and transmit or receive a plurality of light beams. Together so that the difficulty is reduced in the setting and maintaining the positional relationship of the plurality of optical means for improvement of the utilization of a plurality of light beams is achieved.
[0126]
Further, the recording of the information to be recorded on the optical recording medium is modulated according to a modulation control signal based on the information to be recorded, and the plurality of light beams to be substantially arranged in a common plane. Is incident on the optical recording medium, so that light spots arranged linearly on the optical recording medium are formed. Therefore, the light spots are not subjected to modulation and are substantially in a common plane. It is assumed that a plurality of light beams to be arranged are incident on the optical recording medium driven by the recording medium drive control unit. It can be performed relatively easily without any processing.
[Brief description of the drawings]
FIG. 1 is a block connection diagram showing a main part of an example of an information recording apparatus according to any one of the first to tenth aspects of the present invention.
FIG. 2 is a diagram illustrating a configuration example of a one-dimensional light modulation unit in the example of the information recording device illustrated in FIG. 1;
FIG. 3 is a diagram showing an example of a configuration of a laser light source and an optical system on which a laser light beam from the laser light source enters in the example of the information recording apparatus shown in FIG. 1;
FIG. 4 is a concept provided for describing a configuration example of a laser light source and an optical system shown in FIG. 3;
FIG. 5 is a diagram illustrating another example of the configuration of the laser light source and the optical system on which the laser light beam from the laser light source is incident in the example of the information recording apparatus illustrated in FIG. 1;
6 is a diagram illustrating a specific configuration example of the laser light source in the configuration example of the laser light source and the optical system illustrated in FIG. 5;
FIG. 7 is a concept provided for describing a configuration example of the laser light source and the optical system shown in FIG. 5;
FIG. 8 is a conceptual diagram serving to explain information recording on an optical tape by the example of the information recording apparatus shown in FIG. 1;
FIG. 9 is a conceptual diagram explaining information recording on an optical tape by the example of the information recording apparatus shown in FIG. 1;
FIG. 10 is a conceptual diagram serving to explain information recording on an optical tape by the example of the information recording apparatus shown in FIG. 1;
FIG. 11 is a block connection diagram showing a main part of an example of an information recording / reproducing apparatus according to the invention described in claim 11 or claim 12 of the present application.
FIG. 12 is a block connection diagram showing a main part of an example of an information recording / reproducing apparatus according to any one of claims 13 to 15 of the present application.
FIG. 13 is a block connection diagram showing a main part of an example of an information recording / reproducing apparatus according to any one of claims 16 to 18 of the present application.
FIG. 14 is a block connection diagram showing a main part of an example of an information recording / reproducing apparatus according to any one of claims 19 to 21 in the claims of the present application.
FIG. 15 is a block connection diagram showing a main part of an example of a conventionally proposed optical tape recording / reproducing apparatus.
FIG. 16 is a conceptual diagram serving to explain a two-dimensional light modulator in the example of the conventionally proposed optical tape recording / reproducing apparatus shown in FIG.
FIG. 17 is a conceptual diagram serving to explain a two-dimensional light modulator in the example of the conventionally proposed optical tape recording / reproducing apparatus shown in FIG.
FIG. 18 is a conceptual diagram explaining a two-dimensional light modulation unit in the example of the conventionally proposed optical tape recording / reproducing apparatus shown in FIG.
FIG. 19 is a conceptual diagram explaining information recording on an optical tape by the example of the conventionally proposed optical tape recording / reproducing apparatus shown in FIG.
FIG. 20 is a conceptual diagram showing a two-dimensional laser diode array in another example of a conventionally proposed optical tape recording / reproducing apparatus.
FIG. 21 is a conceptual diagram serving to explain information recording on an optical tape by a conventionally proposed optical tape recording / reproducing apparatus using the two-dimensional laser diode array shown in FIG. 20;
FIG. 22 is a conceptual diagram for explaining information recording on an optical tape by a conventionally proposed optical tape recording / reproducing apparatus using the two-dimensional laser diode array shown in FIG. 20;
[Explanation of symbols]
21, 55, 61 ... laser light source, 22, 45, 56, 57, 62, 69 ... optical system, 23, 66 ... one-dimensional light modulator, 25 ... reflection type light modulator, Reference numerals 30, 43: laser diode, 31: cylindrical lens, 35, 67: modulation control signal transmission unit, 40: one-dimensional diode array, 46, 52, 70: recording medium drive control unit , 47, 53, 71 ... optical tape, 50 ... information recording section, 51, 59, 77 ... information reproducing section, 58, 76 ... light detecting section, 63 ... polarizing beam splitter, 64, 68: 1/4 wavelength plate, 72: Optical beam splitter, 73, 75: Optical element, 74: Focus / tracking detector

Claims (21)

A recording medium drive control unit that drives the optical recording medium;
A light source for emitting a light beam;
A one-dimensional light modulation section in which a plurality of light modulation means are linearly arranged,
A first optical system that causes a light beam from the light source unit to enter the one-dimensional light modulation unit;
A plurality of light modulation means of the one-dimensional light modulation unit, a modulation control signal sending unit for supplying a modulation control signal based on information to be recorded,
A plurality of light beams obtained by the one-dimensional light modulator and modulated in accordance with the modulation control signal and arranged in accordance with the arrangement of the plurality of light modulators are driven by the recording medium drive controller. A second optical system that enters the optical recording medium to be in a state in which two adjacent ones are brought into close or mutual contact with each other, and the information to be recorded is recorded on the optical recording medium;
An information recording device comprising: 2. The information recording apparatus according to claim 1, wherein the modulation control signal transmission unit supplies an individual modulation control signal to each of the plurality of light modulation units of the one-dimensional light modulation unit. The first optical system is configured such that the first optical system has an elongated cross-sectional shape that extends a light beam from a light source unit in a direction along an arrangement direction of a plurality of light modulation units forming a one-dimensional light modulation unit. 2. The information recording apparatus according to claim 1, wherein the light is incident on a part. A first optical system receives a light beam from a light source unit, and a cylindrical lens that gives the light beam from the light source unit an elongated cross-sectional shape, and condenses the light beam passing through the cylindrical lens to a one-dimensional light modulator. 4. The information recording apparatus according to claim 3, wherein the information recording apparatus includes a condensing lens that causes the light to be condensed. The light source unit emits a plurality of light beams arranged linearly, and the first optical system transmits the plurality of light beams from the light source unit to a plurality of light modulation units of a one-dimensional light modulation unit. 2. The information recording apparatus according to claim 1, wherein the information is incident. 6. The information recording apparatus according to claim 5, wherein the light source unit is configured by a one-dimensional diode array in which a plurality of light emitting diodes are linearly arranged. A plurality of light modulating means of the one-dimensional light modulating unit are constituted by reflection type light modulators, and the first optical system causes a light beam from a light source unit to enter the reflection type light modulator. The information recording device according to claim 1, wherein A reflection type light modulator constituting each of the plurality of light modulation units of the one-dimensional light modulation unit changes the amount of reflected light according to a modulation control signal supplied from a modulation control signal transmission unit. Item 7. The information recording device according to Item 7. The optical recording medium driven by the recording medium drive control unit is a running tape-shaped optical recording medium, and the second optical system transmits a plurality of light beams obtained by the one-dimensional light modulation unit to the tape-shaped optical recording medium. 2. The information recording apparatus according to claim 1, wherein the arrangement direction of the plurality of light beams is made to enter the medium at a predetermined angle with respect to the running direction of the tape-shaped optical recording medium. The arrangement direction of the plurality of light beams incident on the tape-shaped optical recording medium by the second optical system is substantially orthogonal to the running direction of the tape-shaped optical recording medium. The information recording device according to claim 9. A recording medium drive control unit that drives the optical recording medium;
A first light source unit that emits a light beam;
A one-dimensional light modulation section in which a plurality of light modulation means are linearly arranged,
A first optical system that causes a light beam from the first light source unit to enter the one-dimensional light modulation unit;
A plurality of light modulation means of the one-dimensional light modulation unit, a modulation control signal sending unit for supplying a modulation control signal based on information to be recorded,
A plurality of light beams obtained by the one-dimensional light modulator and modulated in accordance with the modulation control signal and arranged in accordance with the arrangement of the plurality of light modulators are driven by the recording medium drive controller. A second optical system that enters the optical recording medium to be in a state in which two adjacent ones are brought into close or mutual contact with each other, and the information to be recorded is recorded on the optical recording medium;
A second light source unit that emits a light beam;
A light beam from the second light source unit is made incident on an optical recording medium driven by the recording medium drive control unit, and a light beam modulated in accordance with information recorded on the optical recording medium is output from the optical recording medium. A third optical system to be obtained from the medium,
A light detection unit that generates an output signal that changes according to a change in an incident light beam;
A fourth optical system that causes a light beam obtained from the optical recording medium, on which a light beam from the second light source unit is incident, to be incident on the light detection unit;
An information reproducing unit that reproduces information recorded on the optical recording medium based on an output signal obtained from the light detection unit;
An information recording / reproducing device comprising: 12. The information recording / reproducing apparatus according to claim 11, wherein the second light source unit emits a plurality of light beams arranged substantially in a common plane. A recording medium drive control unit that drives the optical recording medium;
A light source for emitting a light beam;
A polarizing beam splitter on which a light beam from the light source unit is incident,
A one-dimensional light modulation unit in which a plurality of reflection-type light modulation means are linearly arranged,
A first optical system that causes the light beam from the light source unit reflected by the polarization beam splitter to enter the one-dimensional light modulation unit;
A plurality of reflection-type light modulation means of the one-dimensional light modulation unit, a modulation control signal transmission unit for supplying a modulation control signal based on information to be recorded or a preset modulation control signal,
Modulated and reflected in the plurality of reflective light modulating means in accordance with the modulation control signal, or obtained without being modulated, depending on the arrangement of the plurality of reflective light modulating means. When a plurality of light beams transmitted through the first optical system and the polarizing beam splitter are arranged and arranged on an optical recording medium driven by the recording medium drive control unit, two adjacent beams come close to or come into contact with each other. Incident as a state, a state in which the recording of the information to be recorded is performed on the optical recording medium, or a plurality of light beams modulated according to the information recorded on the optical recording medium are transmitted from the optical recording medium. A second optical system to be obtained,
A light detection unit that generates an output signal that changes according to a change in an incident light beam;
A third optical system that causes a plurality of light beams obtained from the optical recording medium driven by the recording medium drive control unit and reflected by the polarization beam splitter to enter the light detection unit;
An information reproducing unit that reproduces information recorded on the optical recording medium based on an output signal obtained from the light detection unit;
An information recording / reproducing device comprising: The second optical system includes a light beam control unit that performs focus control and tracking control on a plurality of light beams incident on the optical recording medium driven by the recording medium drive control unit. An information recording / reproducing apparatus according to claim 13. Receiving a light beam from the optical recording medium driven by the recording medium drive control unit, and outputting an output signal representing one or both of a focus state and a tracking state of the light beam incident on the optical recording medium according to the light beam. A third optical system obtained from an optical recording medium driven by the recording medium drive control unit, and a plurality of light beams reflected by the polarization beam splitter, the light detection unit 15. The information recording / reproducing apparatus according to claim 14, further comprising a light beam splitter for making the light beam enter both the focus and tracking detection unit. A recording medium drive control unit that drives the optical recording medium;
A light source for emitting a light beam;
A polarizing beam splitter on which a light beam from the light source unit is incident,
A one-dimensional light modulation unit in which a plurality of reflection-type light modulation means are linearly arranged,
A first optical system that causes the light beam from the light source unit transmitted through the polarization beam splitter to enter the one-dimensional light modulation unit;
A plurality of reflection-type light modulation means of the one-dimensional light modulation unit, a modulation control signal transmission unit for supplying a modulation control signal based on information to be recorded or a preset modulation control signal,
Modulated and reflected in the plurality of reflective light modulating means in accordance with the modulation control signal, or obtained without being modulated, depending on the arrangement of the plurality of reflective light modulating means. The plurality of light beams transmitted through the first optical system and reflected by the polarization beam splitter are arranged in an optical recording medium driven by the recording medium drive control unit. A state in which the information to be recorded is recorded on the optical recording medium, or a plurality of light beams modulated in accordance with the information recorded on the optical recording medium, A second optical system to be obtained from a recording medium;
A light detection unit that generates an output signal that changes according to a change in an incident light beam;
A third optical system that causes a plurality of light beams obtained from the optical recording medium driven by the recording medium drive control unit and transmitted through the polarization beam splitter to enter the light detection unit;
An information reproducing unit that reproduces information recorded on the optical recording medium based on an output signal obtained from the light detection unit;
An information recording / reproducing device comprising: The second optical system includes a light beam control unit that performs focus control and tracking control on a plurality of light beams incident on the optical recording medium driven by the recording medium drive control unit. The information recording / reproducing device according to claim 16. Receiving a light beam from the optical recording medium driven by the recording medium drive control unit, and in response to the light beam, outputting an output signal representing one or both of a focus state and a tracking state of the light beam incident on the optical recording medium. A third optical system obtained from an optical recording medium driven by the recording medium drive control unit, and a plurality of light beams transmitted through the polarization beam splitter, the light detection unit 18. The information recording / reproducing apparatus according to claim 17, further comprising a light beam splitter for making the light beam incident on both the focus / tracking detection unit. A recording medium drive control unit that drives the optical recording medium;
A light source for emitting a light beam;
A one-dimensional light modulation unit in which a plurality of reflection-type light modulation means are linearly arranged,
A first optical system that causes a light beam from the light source unit to enter the one-dimensional light modulation unit;
A plurality of reflection-type light modulation means of the one-dimensional light modulation unit, a modulation control signal transmission unit for supplying a modulation control signal based on information to be recorded or a preset modulation control signal,
Modulated and reflected in the plurality of reflective light modulating means in accordance with the modulation control signal, or obtained without being modulated, depending on the arrangement of the plurality of reflective light modulating means. A plurality of light beams arranged and arranged in the optical recording medium driven by the recording medium drive control unit are made incident on the optical recording medium in a state in which two adjacent ones are close to or in contact with each other, and the recording should be performed on the optical recording medium. A second optical system including a polarizing beam splitter, in a state where information is recorded, or in a state where a plurality of light beams modulated according to the information recorded on the recording medium are obtained from the optical recording medium; System and
A light detection unit that generates an output signal that changes according to a change in an incident light beam;
A third optical system that causes a plurality of light beams obtained from the optical recording medium driven by the recording medium drive control unit and passed through the polarization beam splitter included in the second optical system to enter the light detection unit; System and
An information reproducing unit that reproduces information recorded on the optical recording medium based on an output signal obtained from the light detection unit;
An information recording / reproducing device comprising: The second optical system includes, in addition to the polarization beam splitter, a light beam control unit that performs focus control and tracking control on a plurality of light beams incident on the optical recording medium driven by the recording medium drive control unit. 20. The information recording / reproducing apparatus according to claim 19, wherein: Receiving a light beam from the optical recording medium driven by the recording medium drive control unit, and in response to the light beam, outputting an output signal representing one or both of a focus state and a tracking state of the light beam incident on the optical recording medium. And a third optical system obtained from an optical recording medium driven by the recording medium drive control unit, and a plurality of light beams that have passed through a polarizing beam splitter. 21. The information recording / reproducing apparatus according to claim 20, further comprising a light beam splitter that is made incident on both the focus and tracking detection unit.

Images