TW563113B - Optical recording method, optical recording medium and optical irradiating time controlling device - Google Patents

Abstract

The purpose of the present invention is to increase the recording density of information on an optical recording medium and to suppress the occurrence of errors during reading operation. By this optical recording method, recording marks 48A to 48G are formed by irradiating the optical recording medium 10 with a laser beam. In a recording layer 12, virtual recording cells 40 are prescribed successively in a moving direction S and the reference irradiation time of the laser beam is set in >= 5 stages; and a specific standby time of a next adjacent virtual recording cell 40 is prescribed corresponding to the length of the reference irradiation time of a precedent virtual recording cell 40, and an actual irradiation time is set by subtracting the standby time from the reference irradiation time for which the next virtual recording cell 40 should be irradiated. The recording medium is irradiated with the laser beam for the actual irradiation time with a delay of irradiation start timing, and thus at least 5 kinds of recording marks 48A to 48G of different size are formed to perform the multilevel recording of information.

Description

563113 A7 _ B7 V. Description of the invention (0 (please read the precautions on the back and fill in this page first) The present invention relates to an optical recording method and optical recording for performing multi-stage recording by forming a plurality of recording marks in cooperation with providing recorded data The medium and the irradiation time control device of the laser beam to which the recording is applied. For example, in a conventional optical recording medium, a method of recording data by changing the length of a reproduction signal (the length of a reflection signal modulation section) in multiple stages is mostly related to The depth of the multi-stage reproduction signal (modulation of the reflected signal) is researched on the method of recording complex data in each signal of the same length. According to this optical recording method, as long as it is compared with the 2 値 data with or without pits, Multiple data can be recorded in the depth direction, so the amount of signals allocated at a certain length can be increased, which can increase the line recording density. The method of switching the depth of the reproduced signal by multi-segment is generally to switch the power of the laser beam in multiples to form any Different types of recording marks. Proposal 1 is to use laser photography or The recording layer is multi-layered. In addition, here are recorded multiple types of recorded data with different modulations of the reflected signals. This is called a multi-stage recording. The Intellectual Property Bureau, Ministry of Economic Affairs, Employee Consumption Cooperative printed on the one hand. The optical recording method of multi-stage recording has the problem that as the power of the laser beam during recording becomes larger, that is, as the depth of the formed reflected signal becomes deeper, the signal quality during reproduction deteriorates. The reason is even At present, for example, conventional methods are used to shorten the recording mark in order to increase the recording information volume of the recording medium. When the power of the laser beam is switched in multiple stages for multi-stage recording, the signal quality deteriorates. It is very obvious. Even with multi-stage recording, it becomes difficult to increase the density of the recording marks, and it has the problem of incompatibility. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 4 563113 A7 __B7 V. Description of the invention (2) The idea of an optical recording method of switching the power of a conventional laser beam to perform multi-stage recording step by step, provided that: The recording mark length is larger than the diameter of the condensing beam (beam width) during recording. Generally, the diameter of the condensing beam is κλ / ΝΑ (K: fixed number, λ: laser wavelength, NA: number of lenses) It is generally used in CD pickups; l = 78 nm, NA = 0.45, and the diameter of the condensing beam is about 1.6 // m. At this time, the recording mark length becomes 1.6. // m or so, the above-mentioned signal degradation problem is obvious, and it is difficult to perform multi-stage recording of more than 5 stages by changing the laser beam power. It is considered that the above problem is the laser beam power setting and recording All factors such as the characteristics of the media are intricate and complicated, but the extent to which the present inventors are aware is not so clear. The actual situation of high-density multi-stage recording, including its recording method, has not been achieved. The present invention has been made in view of the above-mentioned problems, and proposes a new multi-stage recording method, which aims to achieve high-density multi-stage recording. The present inventors re-examined the optical recording medium deliberately, and found a recording method for multi-stage recording, and confirmed that the high-density multi-stage recording of the optical recording medium can be performed by using this recording method. The above object can be achieved by the following invention. (1) An optical recording method is an optical recording method for forming a recording mark on a light-transmitting substrate by using laser beam irradiation on an optical recording medium having a recording layer, which is characterized in that Any unit length in the moving direction and any single paper size in the direction perpendicular to this apply to the Chinese National Standard (CNS) Α4 specification (210 × 297 meals) (Please read the precautions on the back before filling out this page). Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs ’Consumer Cooperatives 563113 A7 B7 V. Description of the invention (3) A virtual recording unit with a width of digits, along with the aforementioned moving direction, stipulates that the immediate recording layer 'will target the aforementioned laser beam of the aforementioned virtual recording unit The reference irradiation time is set to more than 5 stages, and in accordance with the length of the reference irradiation time of the preceding virtual recording unit, the predetermined standby time of the next next virtual recording unit is specified, and the next standby time can be irradiated to the next. Subtract the standby time from the reference irradiation time of the virtual recording unit to set the actual irradiation time The laser beam is irradiated with the actual irradiation time only when the irradiation start time is delayed, and at least 5 kinds of recording marks with different sizes are formed for the plurality of virtual recording units. Area ratio to modulate light reflectivity for multi-stage recording of information. (2) An optical recording method is an optical recording method for forming a recording mark on a light-transmitting substrate by using laser beam irradiation on an optical recording medium having a recording layer, which is characterized by: A virtual recording unit of an arbitrary unit length in a relative moving direction and an arbitrary unit width in a direction perpendicular to this, continuously specifies the preceding recording layer along the moving direction, and the reference irradiation time of the laser beam to the virtual recording unit It is set at 5 or more stages, and considering the heat accumulated by the preceding virtual recording unit through the irradiation of the laser beam, the predetermined standby time of the next next virtual recording unit is specified, and the next virtual recording can be irradiated to the next virtual recording unit. The reference irradiation time of the unit is subtracted from the standby time to set the actual irradiation time. Only the aforementioned standby time portion, the delayed irradiation start timing is used to irradiate the laser beam with the actual irradiation time, and for a plurality of the aforementioned virtual recording units, At least 5 different sizes of papers are applicable. National Standard (CNS) 8 4 specifications (2 丨 οχ ”7 mm) Deaf-(Please read the precautions on the back before filling out this page), 1. Printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economic Affairs 563113 A7 B7 5 2. Description of the invention (4) Marking, based on the area ratio with respect to the aforementioned virtual recording unit, modulates the light reflectance to perform multi-stage recording of information. (3) In the above (1) or (2), the optical recording method For the test recording area prepared by the aforementioned optical recording medium, the standby time is slightly set to zero to form a plurality of the aforementioned recording marks, and whether the heat accumulated by the preceding recording marks of the adjacent recording marks affects the formation A record mark is used to read the record mark and measure it until the influence of the heat becomes below a predetermined allowable threshold, and then slowly increase and repeat the standby time, and form a plurality of the record marks, and measure (4) In the above (1), (2), or (3), the optical recording method is for recording in the aforementioned virtual recording. The above-mentioned recording mark of the element includes at least a size smaller than the beam spot diameter of the laser beam. (5) An optical recording medium includes a recording layer on a light-transmitting substrate, and the recording layer is irradiated with a laser beam. An optical recording medium forming a recording mark is characterized in that by using the optical recording method described in any one of (1) to (4) above, five or more kinds of recording marks having different sizes are formed for the plurality of the aforementioned virtual recording units. (6) An irradiation time control device belongs to an irradiation time control device for forming a recording mark 'for controlling a laser beam irradiation time on an optical recording medium provided with a recording layer on a light-transmitting substrate, and is characterized in that It has: the unit time setting unit which continuously sets the unit time specified for the aforementioned recording layer, and sets the unit time setting unit of the virtual recording unit that matches the unit time; this paper size is applicable to the Chinese National Standard (CNS) 8-4 specification (21 × 297 mm) (%) (Please read the precautions on the back before filling out this page)-Pack. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 56311 3 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 _________ V. Description of the invention (5) and the reference irradiation time setting section which specifies the reference irradiation time of 5 stages or more within the aforementioned unit time; An allocation processing unit for each of the aforementioned reference irradiation times for each of the plurality of aforementioned unit times; and calculating the standby time of the next preceding unit time in accordance with the length of the aforementioned reference irradiation time allocated to the preceding unit time, and The actual irradiation time calculation unit that calculates the actual irradiation time by subtracting the standby time from the reference irradiation time allocated to the next unit time; and for the next unit time, only the standby time partially delays the laser power. At the N timing, the power is maintained at the same time as the actual irradiation time. The laser irradiation instructing section instructs the laser in the N state. The present inventors did not modulate the laser beam power at the time of recording, but discovered that it is possible to perform multi-stage recording by adjusting the laser beam irradiation time. As a result, the recording density can be dramatically improved. However, the recording mark is simply formed by simply modulating the irradiation time, and it is clearly determined that the recording mark cannot be read reliably. When the present inventors further analyzed, the high-density multi-level method of forming one recording mark for each virtual recording unit, and the relationship between adjacent recording marks became an important factor for improving the reading accuracy, especially the formation of advance When recording a mark, the heat accumulated in the recording unit may understand the possibility of a reflectance error when forming a recording mark on the next virtual recording unit. Therefore, the present invention considers the heat accumulated in the previous recording mark, and ensures the standby time for the next virtual recording unit. The purpose of this standby time is to prohibit the laser beam from being irradiated. The actual irradiation time becomes longer than the predetermined reference photo. ^^^ Chinese National Standard (CNS) A4 specification (210X297 mm)-8 (Please read the precautions on the back before (Fill in this page)-Installation-563113 A7 B7 V. Description of the invention (6) The irradiation time is short, and only the standby time is delayed from the scheduled irradiation start timing, and irradiation starts. In this case, the insufficient heat equivalent to the standby time becomes the thermal storage portion of the previous recording mark allocated, and the result is to obtain a predetermined recording mark, which is a predetermined (virtual recording unit) light reflectance. By reducing the size of each virtual recording unit, the recording marks can be brought close to each other, and the recording density of the optical recording medium can be increased. Furthermore, it is preferable that the recording layer of the optical recording medium is constituted of a multi-stage recording including an organic dye, and the present inventors have confirmed that five or more stages are actually achieved. The present invention described above may be added with the following configuration. An optical recording method for recording information in a multi-stage or multi-stage manner by modulating the overall light reflectance of the virtual recording unit based on the area occupancy of the virtual recording unit with respect to the recording mark formed in the virtual recording unit. A groove for guiding a laser beam is provided along the recording layer, and the virtual recording unit is an optical recording medium that is set in the groove and has a unit width that is slightly equal to the width of the groove. An optical recording medium characterized by specific information representing a multi-stage recording medium is recorded in the aforementioned virtual recording unit. A groove for guiding a laser beam is provided along the recording layer, and the groove is an optical recording medium characterized by being partially cut in halfway. Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The optical paper size to which the optical recording method according to the embodiment of the present invention is applied is the Chinese National Standard (CNS) A4 specification (210X297) 9 '(Please read the precautions on the back before filling this page) • Binding. Order Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 563113 A7 _B7 V. Description of the invention (7) (Please read the precautions on the back before filling this page) Recording medium (disc) 1 0 is used in the recording layer 1 2 Use dye CD-R consists of a substrate 1 4 made of a transparent substrate; and a laser beam covered and coated on one of the surfaces of the substrate 14 (the upper surface in FIG. 1). The aforementioned recording layer 12 made of a dye for guiding grooves 16; and a reflective film 18 made of gold or silver formed on the recording layer 12 by sputtering or the like; covering the reflective film 18 The outer protective layer 20 is formed. The dyes used in the aforementioned recording layer 12 include: pholine blue, cyanine, methine dyes and their derivatives, thiophenol metal complexes, phthalocyanine dyes, naphthalocyanine dyes, and azo dyes. dye. The multi-stage recording of the optical recording medium 10 is performed by the optical recording device 30 shown in FIG. The optical recording device 30 refers to a CD-R recorder, and the optical recording medium (disc) 10 is rotated and driven at a constant line speed by a spindle motor 3 2 through a spindle servo 3 1. The laser beam 'of the shooting device 36 is a person who records information on an optical recording medium (disc) 10. The above-mentioned laser device 36, which is printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, is based on recordable information, and uses a laser driver 38 to control the virtual recording unit shown in FIG. 1 (described in detail below). The actual irradiation time of the beam, for example, the number of laser pulses. The symbol 42 in FIG. 2 refers to a recording optical system including an objective lens 4 2 A and 稜鏡 4 2 B. The objective lens 4 2 A is a recording layer 12 for controlling the focusing of the laser beam on the disc 10 by the focus tracking server 44. The objective lens 4 2A and 稜鏡 4 2 B use the transport server 46 and the disc 10. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (21〇 > < 297 meals) 563113 A7 B7 V. Description of the invention (8) The rotation of the 疋 同步 rotation is controlled from its inner peripheral side to the outer peripheral side at a predetermined speed. (Please read the precautions on the back before filling this page.) The aforementioned spindle server 3 1. Focus search The track server 44 and the transport server 46 are controlled by the control device 50. The data (information) that can be recorded in the recording layer 12 is input to the control device 5. As shown in detail in Fig. 3, the laser driver 38 includes an irradiation time control device 39. The irradiation time control device 39 includes a unit time setting unit 60, a reference irradiation time setting unit 62, a distribution processing unit 64, an actual irradiation time calculation unit 66, and an irradiation instruction unit 6800. The unit time setting unit 60 is a unit time τ (T1, T2, T3, T4, T5, T6, ...) that is continuously specified. This result is, for example, for a virtual recording unit 4 having a predetermined length Η of “νχΤ” continuously on the optical recording medium 10 when the moving speed (linear velocity) of the optical recording medium 10 of the laser device 36 is ν. 0. The reference irradiation time setting unit 62 defines a reference irradiation time of 5 or more stages (here, 7 stages of A to G) within the above unit time T, and prints t A ...... t G. In this case, the reference irradiation times t A,..., T G are recorded in the memory in advance, and the reading irradiation time may be specified, and the reference irradiation time information written in the optical recording medium 10 may be specified. Yes.

The allocation processing unit 64 is used to modulate the original information stored in the control device 50, to set a bit series for multi-stage recording, and to allocate the time T in each unit. For this multi-level bit series, there are 7 segments in this example (A ---- «---- This paper size applies the Chinese National Standard (CNS) A4 specification (2! 0X297 mm) 563113 A7 B7 5 The invention description (9): Record marks of B, C, D, E, F, G), for example, {B, E, D, C, G, G, ···} and the like. (Please read the precautions on the back before filling in this page.) This number refers to the number of levels of the recording mark formed in each recording unit 40. Therefore, each unit time T 1, T 2 is allocated at the reference irradiation time t as {t B, t E, t D, t C, t F, t G,... …. The actual irradiation time calculation unit 66 is to set the standby time s of the next next unit time T according to the length of the reference irradiation time t allocated to the preceding unit time T, and from the reference assigned to the next unit time T Subtract the standby time s from the irradiation time t to obtain the actual irradiation time g.

For example, in this example, the standby times of s A to s G are set to match all the reference irradiation times t A to t G. In the above 丨 t B, t E, tD, tC, tG, tG, 丨, try to consider the first print by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

For the unit time T 1, first select the standby time s B that is assigned to this reference irradiation time t B, and subtract the standby time s B from the next reference irradiation time t E to obtain the actual irradiation time g 2 (two t E-s B) ° Therefore the series of actual exposure time g {g 1, g 2, g 3, bogey 4, bogey 5, bogey 6, ~} becomes {1 already, seven £ 1: 3: 8, tD- sE, tC— sD, tG— sC, tG-sG, ···} ° Irradiation indication section 6 8 is the standby time in this unit time T, only the aforementioned standby ________ ± 〇 ——-------- This paper The scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 563113 A7 _ B7 V. Description of the invention (also (please read the precautions on the back before filling this page) Part of time s, the delay of pulses for 0N The timing is started, and the pulse is oscillated at the same time as the actual irradiation time g. As a result, the laser device 36 starts to irradiate a predetermined laser beam for the entire actual irradiation time g. The optical recording medium 10 is as shown in FIG. As shown, the virtual recording unit 40 is continuously defined in the groove 16 in the rotation direction of the disc 34, that is, the circumferential direction. S. The unit length in the circumferential direction S of each virtual recording unit 40 is Η, and as shown in FIG. 4, it is set to a length shorter than the beam diameter (beam width diameter) D. In addition, it is equal to the unit length 上述 (2 (νχΤ) The unit width in the vertical direction is W. Each virtual recording unit 40 is irradiated with a laser beam, and the recording marks 4 8 Α to 4 8 G are exemplified in cooperation with recordable information. Specifically, the following are included: Steps to form a record mark 4 8 A ~ 4 8 G. The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the first profit to prepare a test recording area (not shown) on the innermost side of the optical recording medium 10, and the standby time s It is tentatively set to zero and forms a plurality of record marks 4 8 A to 4 8 G, and reads the record marks 4 8 A to 4 8 G to determine whether there is a thermal effect. This judgment is based on predetermined record marks 4 8 A ~ 4 8 G Ideal read waveform error size. When the error amount does not reach the set allowable time, it is judged that the aforementioned standby time s is too small and gradually increases, and repeat the recording test. The error amount is allowable Point in time The fixed standby time s is the standby time using actual recording. This is the meaning of the standby time when the next recording mark is formed in consideration of the amount of heat stored in the previous recording mark. This paper size applies the Chinese National Standard (CNS) A4 specification ( 210X297 mm) 43- 563113 A7 — —_ B7________ V. Description of the invention (l) l (Please read the notes on the back before filling this page) One example considers the continuous recording of the maximum number of steps in the test recording area (irradiation time Is the longest) record mark 4 8 G. The standby time is zero, and the laser beam is irradiated with the reference irradiation time t G to form a recording mark 4 7 G. When the read waveform of the recording mark 4 8 G deviates from the ideal waveform, the standby time is increased, and it is performed again. Record the test. This is repeated several times for the standby time at an allowable error point, and the heat storage of the previous recording mark 4 8 G (stage number 7) does not affect the standby time s G of the next recording mark. This test surface is performed every time a new optical recording medium 10 is inserted into the optical recording device 30. The standby time s may vary depending on the characteristics of the optical recording medium 10, the ambient temperature, and the like.

When the actual information is recorded on the optical recording medium 10, the unit time T is set. As described, the virtual recording unit 40 is continuously specified. For this virtual recording unit 40, the reference irradiation time t A to t G of the laser beam is set. ο The results are printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, as shown in the time chart in Figure 5, and obtained through the modulation of the original information [J ί Β, Ε, D, C, G, G, ... · Allocate the reference irradiation time to each unit time T1, T2, T3, ... tB, tE, tD, tC, tG, tG, .... Moreover, this example shows that the reference irradiation time t (the front-end reference) is set from the head of each unit time T, but the reference irradiation time (intermediate reference) is set at the center of each unit time T, or each unit The rear side of time T is used as a reference, and a reference irradiation time (back-end reference) may be set. Secondly, it is considered that the photo paper size of the laser beam due to the preceding virtual recording unit 40 applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 44 -------- 563113 A7 ____ B7_ V. Invention Explanation (1) (Please read the precautions on the back before filling out this page) The accumulated heat is used to specify the predetermined standby time of the next virtual recording unit 40. Specifically, it is the benchmark allocated to the preceding virtual recording unit 40. ft ?, g tongue with shooting time t A '§ The standby time determined for the next ^ virtual recording unit 40 is s A. Similarly, the reference irradiation time allocated to the preceding virtual recording unit 40 is t If C, the standby time set in the next virtual recording unit 40 is s C. Furthermore, using the standby time s set as described above, the reference irradiation time {t B, t E, t D, tc, t G, t G, ... 丨 minus the standby time {〇, s B, s E, s D, s C, s G, ... 丨 to set the actual irradiation time {g 1, g2 , G3, g4, g5, g6} = {tB — 〇, t E -sB, tD-sE, tC-sD, tG-sC, t G -s G, ... 丨, and moreover, only the standby time 丨 〇, s B, s E, s D, s C, s G,… 丨, if the delayed start timing of the irradiation is delayed, it will become as in the sixth The time chart shown in the figure. According to this time chart, the laser beam is irradiated, and the recording marks 4 8 A to 4 8 G can be accurately formed, and the light reflectance of each virtual recording unit 40 can be set as desired. Intellectual Property of the Ministry of Economic Affairs Printed by the Bureau ’s Consumer Cooperative, the record marks 4 8A ~ 4 8 G are not formed at the entire spot of the laser beam, but are formed at the center (the laser beam is circular, but the disc is rotated on one side) Sheet 1—The laser beam is irradiated on the side, so the recording mark becomes oblong with the irradiation time.) The reason is that the focused laser beam generally has a Gaussian distribution, but as far as the recording layer 12 is concerned, it only uses more than The threshold of the irradiation energy of the laser beam is used to perform recording, so the terrain can be sequentially expanded from the center to the outside. The cost of paper is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) 4§ --- 563113 A7 B7 V. Description of the invention (also (please read the first Please fill in this page again for details) Record marks 4 8 A ~ 4 8 G. As shown in Figure 4, for example, 7 segments of record marks 4 8 A ~ 4 8 G with different occupancy rates can be formed for the virtual record unit 40. 〇At this time, the sizes of the recording marks 4 8 A to 4 8 G ′ are set to read the virtual recording unit 40 and the light reflectance of the reflected light when the laser beam is irradiated is 7. The light reflectance is The smaller the recording mark, the greater the reflectance. The virtual recording unit without the recording mark becomes the maximum reflectance, and the virtual recording unit forming the maximum recording mark 4 8 G becomes the smallest reflectance. More specifically, it is considered that the aforementioned light reflectance includes the light transmittance of each of the recording marks 4 8 A to 4 8 G, and is determined by the occupation ratio with respect to the virtual recording unit 40. In addition, the light transmittance of the recording marks 4 8A to 4 8 G itself may be degraded due to the material constituting the recording layer 12 being irradiated by the laser beam, and the refractive index may change, or the recording layer 1 may change. 2The amount of change in the thickness direction varies. If the light transmittance of the formed recording mark portion is zero, this portion is not considered and only the above-mentioned occupancy ratio is used. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs If the recording method according to the above embodiment mode can be used to control the exposure time, a multi-stage recording of more than 5 stages can be achieved. Furthermore, in consideration of the heat accumulated in the previous recording mark 4 8 A to 4 8 G, the next virtual recording unit 40 ensures the standby time s, and allocates the previous recording mark to the insufficient heat equivalent to the standby time s. 4 8A ~ 4 8 G of the above heat storage section. As a result, a predetermined recording mark of 4 8 A to 4 8 G can be obtained, and a predetermined light reflectance (of the virtual recording unit 40) can be obtained. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm). ) 563113 A7 B7 V. Description of the invention ((Please read the precautions on the back before filling this page) In this way, if the light reflectance error is suppressed (staggered), the stage width of the series becomes smaller, and the total number of stages can be increased (this Examples are 7 to A to G) to increase the recording density of the optical recording medium. The test area of the optical recording medium 10 rotated at the actual writing speed is used to set the standby time s by actual measurement, so it can be considered The conditions at the time of recording (peripheral temperature, §5 recording speed, data transfer rate, etc.) become records with fewer errors. Furthermore, in this embodiment, the method of setting the test area is used, but it can also be fixed by setting in advance At this time, for example, the longer the reference irradiation time of the preceding virtual recording unit 40 is set, the longer the standby time is when recording in the next virtual recording unit 40. The signal characteristics at the time of reading are improved. Also, as shown in FIG. 4, the example of the present embodiment is a recording mark having a length of less than the diameter D of the focused laser beam (this example) All the recording targets gS 4 8 A ~ 4 8 G) can also fully read the data. Comparing this result with the conventional knowledge, it can dramatically increase the recording density equivalent to the unit area. The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Furthermore, "this embodiment shows that all the recording marks are smaller than the diameter D of the condensing beam", but the present invention is not limited to this, and includes that only a part of the recording marks is smaller than the diameter D, or all the recording marks are The diameter of the condensing beam is D or more. Also, the above-mentioned optical recording device 30 is a case where the timing of the irradiation time control device 39 to control the power of the laser device 36 is 0N and 0FF. The “irradiation” of the beam is sufficient. • The paper scale is applicable to the Chinese National Standard (CNS) A4 specification (2Γίχ 297 male sauce) --- 563113 A7 ___B7______ 5. Description of the invention (4. A shutter that cuts the focused light to control the irradiation timing. In this example, as described above, the optical recording medium 10 is constituted by a disc indicated as c D-R. The present invention is not limited to this and is generally applicable. In other optical recording media, a disc-shaped rotating body is not limited. In the above-mentioned embodiment, the recording layer 12 is made of an organic dye or a phase-change material such as phospholine blue. However, the present invention is not limited to this, and other than the above may be used. Other organic dyes or inorganic materials can be used as appropriate. However, when using the organic dyes as described above, the laser beam can be used for irradiation power of more than 5 steps, and the size of the recording mark can be changed without changing the size of the recording mark. Extremely high accuracy to read. Furthermore, when forming a recording mark using the optical recording device 30, the size of the virtual recording unit 40 set on the recording layer 12 is not limited to the embodiment. In particular, as long as the beam width of the laser beam can be made smaller, the length is equal to the width of the groove 16. One of them can be set to a laser beam width of 8 or more when recording marks are recorded. At this time, the recording mark of a certain part may be a size larger than the beam width. It is a matter of course that the present invention is also applicable to a disc having a D V D structure, and even the optical recording medium without the groove 16 is also applicable to the present invention. The position of the laser beam in the recording layer 12 is circular, but as shown in FIG. 7, for example, an objective lens 4 2 A is added with a beam shaping unit 4 2 or an aperture (not shown). The shape of the light beam may be an oblong shape or a linear shape in which the recording medium 10 has a short transfer direction and a direction perpendicular to the long direction. At this time, the recording mark 49 becomes shorter, and the virtual recording unit becomes shorter. That is, the recording density can be increased. _________________ Λ Q _ This paper size applies Chinese National Standards (CNS) Α4 specifications (210X297? H ~ '(Please read the precautions on the back before filling out this page) Binding and Ordering Printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economy 563113 A7 B7__ V. Description of the invention (also (please read the precautions on the back before filling out this page) Moreover, the optical recording medium 10 is represented by the symbol 5 2 in the first figure, and it can be provided with the number of segments to be modulated in advance. The number of plural pits having different reflectances, or a part of the optical recording medium may be used in advance to perform multi-stage recording using the optical recording method of the present invention. The plural pits 5 2 and / or multi-stage recording may be performed. Passed part of the recording mark 5 4 records information that individually identifies the recording medium, information that identifies the multi-stage recording optical recording medium, information that determines the reference irradiation time for recording and reproducing the laser beam of the recording medium, and determines the standby time. Specific information such as the information of the reader. The specific information is read during reproduction and / or recording of the optical recording medium, thereby reliably identifying multiple stages. Optical recording media for recording, or identifying them individually, can perform multi-stage recording and reproduction more reliably. Usually CD-R / RW and DVD-R / RW media can make the recording groove meander (snake track). ) And the input signal. This signal is called an address signal. The recording device reads this signal and moves toward the position that determines the recording head. When the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints, for example, CD-R / RW, The address signal records the minute and second time code that replaces the position with time. The recording device reads the time code, moves the magnetic head to the read-in portion, and reads various data. The multi-level optical recording medium of the present invention uses an application CD -R / RW recording devices (recording and reproduction) can use address signals caused by meandering tracks. However, they are usually different from CD-R / RW time codes and use signal methods such as address codes. Usually recording The device will not read an address signal different from CD-R / RW, and will not move the magnetic head to a predetermined position. (At this time, the multi-stage recording optical medium can be ejected by the recording device) The paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) ---- 563113 A7 B7 V. Description of the invention (1 > Regarding the recording device with multi-stage recording, as long as the special bit is identifiably set Address, you can move the magnetic head to the read-in section, and read the signal. (Please read the precautions on the back before filling out this page) It is that the multi-level optical recording medium uses an address that is different from usual, so that it is different from other optical The recording medium is distinguished. For example, as shown in FIG. 8, the serpentine recording is performed by modulating the groove 1 0 2 of the read-in area 1 0 of the optical recording medium 1 0 4 C. Completed by the snake track. Specifically, as shown in FIG. 9, the amplitude W b of the meandering track does not change, and the meandering track periods T a, T B, and T c of each of the grooves 10 4 A, 104 B, and 104 C are changed. For example, take the meandering period T of the groove 16 of the user area 10 in FIG. 8 as a basic period, and load the meandering period T b which is longer than the basic period to "1" and a short meandering. The track signals TA and T c are 2 値 signals of "0" to record the above-mentioned various kinds of information. Therefore, for example, in the meandering cycle, when the inner peripheral side of the optical recording medium is "0", "1", and "0" as described above, the optical recording medium 10 is a medium for multi-stage recording. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs As described above, the information determined in advance is used as the recording start position information, and recording is started from a predetermined position in the user area 106 based on the information. This also becomes the information of the start position of the virtual recording unit 40. Moreover, as shown in FIG. 10, an example of another recording method of the above-mentioned various kinds of information is that the above-mentioned various kinds of information are placed on the convex-track pre-pits 1 7 A of the convex tracks 17 formed between the grooves 16 For example, the period between the pre-pits of the track is "1" for a short time and "0" for a long time to record 2 '. Moreover, other examples are shown in Figure 9 or Figure 1 with the symbol 5 6 As shown, medium _____ 3Θ-- This paper size is in accordance with Chinese National Standard (CNS) A4 (210X 297 mm) 563113 A7 B7 V. Description of the invention (cutting groove 1 6 on the way, the length of the groove cut in the middle is short, for example "1" for long time and ^ 0 for long time. (Please read the precautions on the back before filling out this page.) Use the information recording means shown in Figure 8, Figure 10, and Figure 11 above. The generated information can be read even by the conventional 2 値 recording type reproduction device, so that even if the multi-level optical recording medium is wrong, it is installed in the 2 値 recording type reproduction and / or recording device, It is also easy to determine that this is a multi-stage type. Moreover, the above various information, such as shown in Figure 12 Multi-stage recording can be performed on the read-in area 102 beforehand. At this time, as shown in FIG. 12, the recording marks of the first five virtual recording units 4 0 1 to 4 0 5 can be used to utilize the multi-stage recording medium and Number of segments for multi-stage recording, the next 5 virtual recording units 4 06 to 4 1 0, and the recommended laser power of each record for recording or reproduction, etc. These methods can be used individually or in combination. According to the invention The optical recording method and the optical recording medium can cooperate with the provided data for multi-stage recording, and can make the characteristics of the read signal from the recording mark become better. [Description] FIG. 1 is a perspective view showing a partial cross-section of a main part of an optical recording medium according to an embodiment of the present invention. FIG. 2 is a diagram showing an optical recording apparatus for recording information using a laser beam on the same optical recording medium. The block diagram is shown in Figure 3. Figure 3 shows the exposure time control included in the same optical recording device. ____- 21 · This paper size applies the Chinese National Standard (CNS) A4 specification (2 10X297 mm) 563113 A7 B7

5. Description of the Invention (Block diagram of the structure of the W system. (Please read the precautions on the back before filling out this page). Figure 4 shows the recording mark and the virtual mark when the same optical recording device is used to form the recording mark on the recording layer. A schematic diagram of the relationship between the recording unit and its light reflectance. Fig. 5 is a line diagram showing the generation process of a time chart of laser beam irradiation when a recording mark is formed on a recording layer using the same optical recording device. The final time chart of the laser beam irradiation when the recording mark is formed on the recording layer by the same optical recording device. Fig. 7 is a schematic perspective view showing the laser beam irradiating the virtual recording unit in other shapes. Fig. 8 is an enlarged view showing the pre-recording. A schematic diagram of a meandering track of various kinds of information of the optical recording medium of the present invention. Fig. 9 is a diagram showing the relationship between the meandering period of the meandering track and the 2 値 signal. Fig. 10 is a diagram showing the optical recording medium of the present invention. The pattern diagram of the relationship between the front pit of the convex track recording the various information and the 2 値 signal. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 11 shows the needle. The optical recording medium of the present invention records various types of information, and the pattern of the relationship between the length of the groove cut in the middle and the 2 値 signal is a schematic diagram of the virtual recording unit and recording marks showing various types of information recording the optical recording medium of the present invention. [Illustration of symbols] 10 Optical recording media (disc) 12 Recording layer 〇 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 563113 A7 B7 V. Description of invention Printed by the Bureau's Consumer Cooperative (please read the notes on the back before filling out this page) 14 16 17

1 7 A 18 2 0 3 0 4 Substrate groove convex track convex pit front pit reflective film protective layer optical recording device spindle servo spindle motor disc laser device laser driver irradiation time control device virtual recording unit recording optical system Objective lens 稜鏡 Focus tracking server Transport server Record mark Record mark Control device Pit record mark This paper size applies to China National Standard (CNS) A1 2 Specifications (210X297 mm) 1 0 4 2 4 2 A 4 2 B 4 4 4 6

4 8 A ～ 4 8 G 4 9 2 0 5 2 5 4 563 113 A7 B7 V. Description of the invention (do 6 0 6 2 6 4 6 6 6 8 8 ~ 4 1 0 Unit time setting section Reference irradiation time setting section Assignment processing section Actual irradiation time calculation section Irradiation instruction section Reading area Groove user area virtual recording unit (Please read the precautions on the back before filling this page) Ministry of Economy Printed on paper produced by the Intellectual Property Bureau's Consumer Cooperatives, which is compliant with China National Standard (CNS) A4 (210X 297 mm) 54

Claims (1)

563113 A8 B8 C8 __ D8 6. Scope of patent application 1 1 _ An optical recording method belongs to the optical recording of an optical recording medium having a recording layer on a light-transmitting substrate, and forming a recording mark by irradiating a laser beam The method is characterized in that: a virtual recording unit with an arbitrary unit length in the direction of relative movement of the laser beam and an arbitrary unit width in the direction perpendicular to the laser beam is continuously specified in the previous recording layer along the movement direction, and The reference irradiation time of the laser beam of the virtual recording unit is set to more than 5 stages, and the predetermined standby time of the next next virtual recording unit is specified in accordance with the length of the reference irradiation time of the preceding virtual recording unit. The actual irradiation time is set by subtracting the standby time from the reference irradiation time that can be irradiated to the next virtual recording unit. Only the standby time portion delays the irradiation start timing to irradiate the laser beam of the actual irradiation time. , And for the aforementioned plurality of virtual recording units, form at least 5 For recording marks of different sizes, the light reflectance is modulated according to the area ratio with respect to the aforementioned virtual recording unit to perform multi-stage recording of information. 2. An optical recording method for an optical recording medium having a recording layer on a light-transmitting substrate, and an optical recording method for forming a recording mark by irradiating a laser beam, which is characterized by: The virtual recording unit of an arbitrary unit length in the relative movement direction of the beam and an arbitrary unit width in the direction perpendicular to the beam is continuously specified in the previous recording layer along the movement direction, and will be a reference for the laser beam of the virtual recording unit. The irradiation time is set to more than 5 stages, and the heat accumulated by the preceding virtual recording unit through the irradiation of the laser beam is taken into account to determine the predetermined schedule of the next next virtual recording unit. (CNS) 8 4 threats (210X297 mm): (Please read the notes on the back before filling out this page)-Binding and printing printed by the Intellectual Property Bureau Employee Consumer Cooperatives of the Ministry of Economic Affairs 563113 A8 B8 C8 D8 6. Scope of patent application 2 (Please read the precautions on the back before filling in this page.) The machine time can be irradiated to the next virtual recording unit. The reference irradiation time is subtracted from the standby time to set the actual irradiation time. Only the standby time is delayed, the irradiation start timing is delayed, the laser beam is irradiated with the actual irradiation time, and at least 5 are formed for the plurality of virtual recording units. For recording marks of different sizes, the light reflectance is modulated according to the area ratio with respect to the aforementioned virtual recording unit to perform multi-stage recording of information. 3. The optical recording method according to item 1 or 2 of the scope of the patent application, wherein the test recording area 'for the aforementioned optical recording medium' has a standby time slightly set to zero to form a plurality of the aforementioned recording marks, And whether the heat accumulated by the preceding record mark of the adjacent record mark affects the formation of the next record mark, read the record mark and measure it until the effect of the heat becomes below a predetermined allowable threshold, and slowly The standby time is increased and repeated repeatedly to form a plurality of the aforementioned recording marks, and measurement is performed to specify the predetermined standby time. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 4. The optical recording method as described in item 1 or 2 of the scope of patent application, wherein the aforementioned recording mark recorded in the aforementioned virtual recording unit includes at least less than the aforementioned thunder The size of the beam spot diameter of the beam. 5. The optical recording method according to item 3 of the scope of the patent application, wherein the recording mark recorded in the virtual recording unit includes at least a size smaller than a beam spot diameter of the laser beam. 6. An optical recording medium is an optical recording medium provided with a recording layer on a light-transmitting substrate and irradiating a laser beam to the recording layer to form a recording mark. Its characteristics are as follows: This paper scale applies Chinese national standards ( CNS) A4 specification (210X297mm) -26-563113 A8 B8 C8 ____ D8 VI. Patent Application Scope 3 (Please read the notes on the back before filling out this page) By recording the items in the scope of the patent application, items 1 to 5 In the optical recording method according to any one of items, five or more types of recording marks having different sizes are formed for the plurality of virtual recording units. 7. An irradiation time control device for forming a recording mark on an optical recording medium provided with a recording layer on a light-transmitting substrate, and an irradiation time control device for controlling the irradiation time of a laser beam, which is provided with : The unit time set by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs prints consecutive unit times, and unit time setting units for the aforementioned recording layer continuously setting a virtual recording unit that matches the unit time; and 5 or more stages that specify the unit time A reference irradiation time setting unit for the reference irradiation time of each; an allocation processing unit for each of the aforementioned reference irradiation times using a plurality of the aforementioned unit times in accordance with a predetermined recording mark; and the aforementioned reference irradiation time allocated to the preceding unit time And the actual irradiation time calculation unit that calculates the actual irradiation time by subtracting the standby time from the reference irradiation time allocated to the next unit time; and calculating the actual irradiation time; and For this next unit time, Standby time delay portion foregoing power emitted square Ray N timings while maintaining the state of each power ◦ N in the actual irradiation time indication portion indicating the irradiation of the laser. This paper size applies to China National Standard (CNS) A4 (210X297 mm) -27-