經濟部智慧財產局員工消費合作社印製 46 316 3 A7 5 l U6lw f.doc- ()0(^ _B7_… 一__ 五、發明說明（/ ) 本發明是有關於-種高密度光學記錄媒體，且特別是 有關於一種具有較短的訊號坑(Pit)最小長度、較密的資料 軌軌距(Track Pitch)，以及超高密度、超大容量之特級影音 光碟（Extra-Video Compact Disk, XVCD)。 自從1982年荷蘭菲利浦(Philips)公司及日本新力（Sony) 公司共同發表紅皮書，訂定出光碟（Compact Disk, CD)規格 後，音樂光碟（C⑽pact Disk Digital Audio, CD-DA)便成爲 光碟機系列產品的始祖。因爲CD光碟片具有資料儲存容 量大、保存容易與高傳真音質等優點，所以迅速取代了傳 統式的塑膠唱片及錄音帶，成爲影音市場中的主流媒體。 由於電腦科技的發展及多媒體的流行，隨著黃皮書、 綠皮書、橘皮書、白皮書等規格相繼發表後，CD光碟片 在資料儲存方面因而具有更廣的應用範圍，例如：唯讀型 光碟（Compact Disk Read Only Memory, CD-ROM)、互動式 光碟（C⑽pact Disk-Interactive, CD-I)、影音光碟（Video Compact Disk, VCD)等。因此CD光碟片被大量運用在數位 資料及影像資料的儲存，而且運用光碟儲存資料的技術也 已使CD光碟片成爲一種相當成熟的數位儲存媒體，並佔 .有絕大部分的光學記錄媒體市場。 隨著多媒體應用範圍的日益增廣，以及使用者對影像 與音效的要求越來越高，導致所需儲存的資料量也愈來愈 多。然而目前CD光碟片的儲存容量僅有650MB ’播放音 樂時最多僅能播放74分鐘。但是通常一部電影至少有90 分鐘，因而造成多片裝CD光碟片大量增加°而且在播放 3 本紙張尺度適用中國國家標準（CNS)A4覘格（210 X 297公爱) ----*--------裝--------訂-----------線"Γ (請先閲讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 4 6 316 3 a7 > l Ο 61 \v ί . d o c 0 0 6 _____B7__ 五、發明說明（Λ ) 電影時，每至一個段落就必須中斷放映以更換碟片，操作 頗爲不便，所以CD光碟片已漸漸不敷使用。 而超級影音光碟（Super Video Compact Disk, SVCD)的 容量更是明顯不足，由於超級影音光碟爲了獲得高解析、 高畫質的視覺效果，採用2/3 D1的訊號壓縮影片，使得-片650MB的CD光碟片只能容納37分鐘的影片。而一般 影片的播放時間大多在100分鐘左右，若以目前習用的CD 光碟片來記錄影片資料，仍需要三片CD光碟片才能容納 如此龐大的資料量，因此在使用上十分不便，而且需要使 用的物料較多、浪費資源。 由於對視聽品質的要求度不斷提高，原有CD光碟片 650MB的容量已無法配合下一世代的影音需求。爲了能將 -部90分鐘的電影收納在直徑Γ2公分的碟片中，新型碟 片所需的容量應爲5GB，是CD光碟片的8倍。因此荷蘭 菲利浦公司/日本新力公司和日本東芝（Toshiba)公司達成協 議，並與其他廠商共同在1996年4月提出了數位多功能 光碟(Digital Versatile Disc, DVD)規格。 與影音光碟(VCD)相比，數位多功能光碟(DVD)其主要 特性是具有更高的資料儲存容量，所以必須使用波長較短 之雷射光源及口徑較大的物鏡，在碟片表面形成直徑較小 的光點（Spot)以讀取/寫入資料。因而連帶引申出碟片厚度、 循軌方法等問題，而且還必須考慮與CD光碟之間的相容 性問題。 爲使數位多功能光碟機達到DVD-CD相容，必須配置 4 本紙張尺度用中國國家標準（CNS)A4規格（210 X 297公釐） ----------I L 裝 -------訂--1---II* 線 * (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 A7 五、發明說明（9) 兩種不同波長之光源，依照形成光點方式之不同，其讀取 頭又可分成單物鏡式和雙物鏡式兩類，或者是使用雙焦點 物鏡，其所需的讀寫機構則較爲複雜。此外，爲防止非法 複製，由數位多功能光碟播放機輸出的訊號，將先經過保 護處理再輸出，此舉雖然可以防堵大部分的盜拷情形，但 也減緩了資訊流通的速度，並降低了消費者的購買意願= 因此本發明提供一種高密度光學記錄媒體，在與CD 光碟相同的碟片面積1、，具有較短的訊號坑最小長度、較 密的資料軌軌距。此種光學記錄媒體擁有較高的資料儲存 密度及容量，可以取代現有的影音光碟。而且可將其設計 成具有雙層結構之光學記錄媒體，其資料容量倍增可達數 位多功能光碟之標準。此種高密度光學記錄媒體可以CD 光碟生產線進行量產，在提高碟片資料儲存密度及容量的 同時，可以降低物料及生產成本，減少資源消耗。此外， 本發明還提供一種光學記錄媒體之讀寫裝置，可由高密度 光學記錄媒體讀取資料，或是將資料寫入高密度光學記錄 媒體。只需使用單--光源及單一物鏡即可讀取高密度光學 記錄媒體與CD光碟的資料，具有較簡單的系統結構。 根據本發明之上述及其他目的，提出一種高密度光孿 記錄媒體，用以記錄資料。此種光學記錄媒體的基板厚度 約爲1.2毫米（MUlimetei·，mm)，直徑約爲丨20毫米或約爲 毫米。在此種光學記錄媒體中具有數個資料軌（Track)，各 資料軌之間軌距的範圍約爲1.06微米（Micron，μιη)至1.13 微米；每一個資料軌中具有數個訊號坑，而訊號坑最小# (請先閱讀背面之注意事項再填寫本買> 於--------訂----- 線乂 本纸張尺度適用中國國家標率<CNS)A1規格（2】0 X 297公坌） 經濟部智慧財產局員工消費合作社印製 46316 3 A -- 5 1 06t\vf.duc 0 06 1 _B7_ 五、發明說明（4) 度約爲0.56微米至0.613微米。單層結構之光學記錄媒體 的資料儲存容量約爲2.0GB至2.35GB，雙層結構的容量則 可達約爲4.0GB至4.7GB。此外，更提出一種光學記錄媒 體讀寫裝置，用以在高密度光學記錄媒體上存取資料，具 有一個雷射光源與一個物鏡，其中雷射光源所提供之雷射 波長約爲680晕微米（Nanometer, nm)至780毫微米，而物 鏡的數値孔徑（Numerical Aperture, NA)約爲0.5至0.52，可 以讀取高密度光學記錄媒體及CD光碟的資料，具有CD 相容性及簡單的系統架構。 爲讓本發明之上述和其他目的、特徵、和優點能更明 顯易懂，下文特舉較佳實施例，並配合所附圖式，作詳細 說明如下： 圖式之簡單說明： 第1圖所繪不爲依照本發明之較佳實施例，一種高密 度光學記錄媒體的示意圖； 第2A圖所繪示爲依照本發明之較佳實施例，一種高 密度光學記錄媒體的資料軌示意圖； 第2B圖所繪示爲依照本發明之較佳實施例，一種高 密度光學記錄媒體的部分結構示意圖； 第3A圖與第3B圖分別繪示依照本發明之較佳實施 例，一種高密度光學記錄媒體，具有單層及雙層結構之剖 面示意圖； 第4圖所繪示爲波面像差與碟片厚度之關係圖； 第5圖所繪示爲依照本發明之較佳實施例，一種高密 (請先閱讀背面之注意事項再填寫本頁) 」裝---- 訂---------線. 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公笼） 4 6 3 1 6 3 5 1 06ΐ \v f'. d oc / 0 0 6 Λ7 R7 經濟部智慧財產局員工消費合作社印製 五、發明說明（<) 度光學記錄媒體之讀寫裝置的結構示意圖； 第6圖與第7圖分別繪示爲由CD規格及DVD規格光 學讀取頭所獲得之眼形圖；以及 第8圖與第9圖分別繪示依照本發明之較佳實施例， 兩種符合XVCD規格的光學讀取頭所獲得之眼形圖。 圖式之標記說明： 100、200、200a、300a、300b、500 :光碟片 102:碟片直徑 _ 104 :基板厚度 202、202a :資料軌 204 :資料軌軌距 206 :訊號坑 208 :訊號坑長度 302、302a、302b :反射層 502.:雷射光源 504 :分光鏡 506 :準直鏡 508 :轉折鏡 510 :物鏡 514 :檢測器 實施例 在現有的光碟規格中包括CD規格和DVD規格。其中 CD光碟片之直徑爲120毫米（mm)，容量爲650MB，基板 厚度爲1.2毫米，軌距爲1.6微米（μΐΏ)，訊號坑最小長度 7 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） f睛先閱璜背面之;i意事項再填寫本頁) 裝·--I I---訂---------1 4 6 316 3 I 06 tw Γ. doc ^)()6 A7 B7 五、發明說明（（ί) ^ 爲0.833微米，光學讀取頭所使用的雷射光源波長爲780 毫微米（nm)，物鏡之數値孔徑爲0.45。而DVD光碟片之直 徑亦爲120毫米，容量爲4.7GB，基板厚度則爲0.6毫米， 軌距爲0.74微米，訊號坑最小長度爲0.4微米，其光學讀 取頭所使用的雷射光源波長爲650毫微米，物鏡之數値孔 徑爲0.6。 請參照第1圖，其所繪示的是依照本發明之較佳實施 例，_-種高密度光學記錄媒體的示意圖。如第1圖所示， 用以儲存資料的數位光碟片100擁有圓形碟狀外觀，具有 特定之直徑102與基板厚度104。本發明之高密度光學記 錄媒體定名爲特級影音光碟（Extra-Video Compact Disk, XVCD)。XVCD光碟片100之直徑102約爲120毫米，與 CD光碟及DVD光碟相同，但是XVCD光碟片100之直徑 102亦可以是約爲80毫米，而基板厚度丨〇4則約爲L2毫 米，與C D光碟相同。 ' 由於CD與DVD所使用的基板（Substrate)厚度不同， 所以CD/VCD光碟生產線必須全面更換設備才能進行DVD 光碟之製作。但是CD/VCD光碟的生產線不需要更換機具， 即可直接進行XVCD光碟之量產，因此可以降低生產成本。 接著參照第2A圖，其所繪示的是依照本發明之較佳 實施例，一種高密度光學記錄媒體的資料軌示意圖，在數 位光碟片200上具有數個資料軌(Track)202 1位於用以儲存 資料的反射層，每一個資料軌202是由環繞碟片200中心 一週的數個資料格所構成。再參照第2B圖，其所繪示的 8 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本ί) 裝------ 訂---------線f 經濟部智慧財產局員工消費合作杜印製 經濟部智慧財產局員工消費合作社印製 16 316 3 λ? M06tut,d〇L.006__^__ 五、發明說明（7) 是依照本發明之較佳實施例，一種高密度光學記錄媒體的 部分結構示意圖’在數位光碟片200a中具有數個資料軌 202a，各資料軌202a之間具有特定之軌距204 ’而每一個 資料軌202a中分別具有數個訊號坑206 ’各訊號坑206具 有不同的訊號坑長度208。 如第2A圖及第2B圖所示，在本發明之高密度光學記 錄媒體-特級影音光碟(XVCD)中’其資料軌之間的軌距204 介於CD規格（1.6微米）與DVD規格(0.74微）之間，較佳的 軌距204約爲1.06微米至1.Π微米，而訊號坑206之最小 長度亦介於CD規格(0.833微米)與DVD規格(0.4微米）之 間，較佳的訊號坑最小長度則約爲〇. 5 6微米至0 613微米。 請參照第3A圖與第3B圖，其所繪示的是依照本發明 之較佳實施例，一種高密度光學記錄媒體，分別具有單層 及雙層結構之剖面示意圖。如第3A圖所示，在XVCD光 碟300a中，具有一層用以儲存資料的反射層302，其表面 之凹陷部份即爲記錄資料之資料軌或資料坑，而反射層3〇2 表面與光碟300a表面之距離約爲1.2毫米。而在第圓 的XVCD光碟30()a中，則具有兩層反射層302a及3〇2a， 其表面與光碟300B表面之距離分別約爲毫米與1 15 毫米。Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 46 316 3 A7 5 l U6lw f.doc- () 0 (^ _B7_… One__ V. Description of the invention (/) The present invention relates to a high-density optical recording medium , And in particular, it relates to a kind of ultra-high-density, extra-large-capacity ultra-video compact disk (XVCD) with a short minimum signal pit (Pit), a denser data track pitch (Track Pitch) ). Since 1982, the Dutch Philips Company and the Japanese Sony Corporation have jointly published the Red Book and set the Compact Disk (CD) specifications, the C⑽pact Disk Digital Audio (CD-DA) Became the ancestor of the optical disc drive series products. Because CD discs have the advantages of large data storage capacity, easy storage and high fax sound quality, they have quickly replaced traditional plastic records and audio tapes and become the mainstream media in the audiovisual market. Due to computer technology The development of multimedia and the popularity of multimedia. With the successive publication of yellow paper, green paper, orange book, white paper and other specifications, CD discs have a wider range of data storage. Scope of use, for example: Compact Disk Read Only Memory (CD-ROM), C⑽pact Disk-Interactive (CD-I), Video Compact Disk (VCD), etc. Therefore, CD discs It is widely used in the storage of digital data and image data, and the technology of using optical discs to store data has also made CD discs a very mature digital storage medium, accounting for most of the optical recording media market. With the multimedia The increasing scope of applications, and the increasing requirements of users for images and sound effects, have resulted in more and more data to be stored. However, the current storage capacity of CD discs is only 650MB 'the most when playing music It can only play for 74 minutes. But usually a movie has at least 90 minutes, which results in a large increase in multi-disc CDs. Also, when playing 3 paper sizes, the Chinese National Standard (CNS) A4 grid (210 X 297) ) ---- * -------- install -------- order ----------- line " Γ (Please read the precautions on the back before filling in this Page) Employee Consumer Cooperatives, Bureau of Intellectual Property, Ministry of Economic Affairs System 4 6 316 3 a7 > l Ο 61 \ v ί .doc 0 0 6 _____B7__ 5. Description of the Invention (Λ) In the movie, the show must be interrupted to change the disc every time a paragraph is inconvenient, so the CD Optical discs are gradually running out of use. And the capacity of Super Video Compact Disk (SVCD) is obviously inadequate. In order to obtain high-resolution and high-quality visual effects, Super Video Compact Disk uses 2/3 D1 signal to compress the video, making-650MB CDs can only hold 37 minutes of video. The playback time of ordinary videos is mostly about 100 minutes. If you use the conventional CD discs to record movie data, you still need three CD discs to accommodate such a huge amount of data. Therefore, it is very inconvenient to use and needs to be used. More materials and waste of resources. As the demand for audiovisual quality continues to increase, the 650MB capacity of the original CD discs can no longer meet the needs of the next generation of audio and video. In order to store a 90-minute movie in a disc with a diameter of Γ 2 cm, the capacity of the new disc should be 5GB, which is 8 times that of a CD disc. As a result, the Dutch Philip Company / Nippon Shinri Co. and Toshiba Japan reached an agreement, and together with other manufacturers proposed the Digital Versatile Disc (DVD) specification in April 1996. Compared with audio-visual discs (VCDs), digital versatile discs (DVDs) have higher data storage capacity. Therefore, a shorter wavelength laser light source and a larger objective lens must be used to form on the surface of the disc. Small diameter spot for reading / writing data. Therefore, issues such as disc thickness and tracking methods are also introduced, and compatibility with CD discs must also be considered. In order for the digital multi-function optical disc drive to be DVD-CD compatible, 4 paper sizes must be equipped with Chinese National Standard (CNS) A4 (210 X 297 mm) ---------- IL Pack- ----- Order--1 --- II * Line * (Please read the precautions on the back before filling out this page) Printed by A7, Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (9) Two different The light source of the wavelength can be divided into single objective type and dual objective type according to the way of forming the light spot, or a dual focus objective lens is used, and the read / write mechanism required is more complicated. In addition, in order to prevent illegal copying, the signal output by the digital multi-function disc player will be protected before being output. Although this can prevent most cases of copying, it also slows down the speed of information circulation and reduces The purchase intention of consumers = Therefore, the present invention provides a high-density optical recording medium, which has the same disc area 1 as a CD disc, has a short minimum signal pit length, and has a denser data track pitch. This optical recording medium has high data storage density and capacity, and can replace the existing video and audio discs. Moreover, it can be designed as an optical recording medium with a double-layer structure, and its data capacity can be doubled to the standard of a digital multi-function disc. This high-density optical recording medium can be mass-produced on a CD production line. While increasing the density and capacity of disc data storage, it can reduce material and production costs and reduce resource consumption. In addition, the present invention also provides a read / write device for an optical recording medium, which can read data from or write data to a high-density optical recording medium. Only a single light source and a single objective lens can be used to read the data of high-density optical recording media and CD discs, and it has a relatively simple system structure. According to the above and other objects of the present invention, a high-density optical twin recording medium is provided for recording data. The substrate of such an optical recording medium has a thickness of about 1.2 mm (MUlimetei ·, mm) and a diameter of about 20 mm or about mm. There are several data tracks in this optical recording medium, and the track pitch between each data track ranges from about 1.06 micron (micron) to 1.13 micron; each data track has several signal pits, and SIGN PIT MINIMUM # (Please read the precautions on the back before filling in this purchase> -------- Order ----- Thread This paper size is applicable to China's national standard < CNS) A1 specification (2) 0 X 297 public address) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 46316 3 A-5 1 06t \ vf.duc 0 06 1 _B7_ V. Description of the invention (4) Degree is about 0.56 microns to 0.613 microns . The data storage capacity of the single-layer optical recording medium is about 2.0GB to 2.35GB, and the double-layer structure can reach about 4.0GB to 4.7GB. In addition, an optical recording medium reading and writing device is also provided for accessing data on a high-density optical recording medium. It has a laser light source and an objective lens, and the laser wavelength provided by the laser light source is about 680 ha microns ( Nanometer (nm) to 780 nanometers, and the numerical aperture (Numerical Aperture, NA) of the objective lens is about 0.5 to 0.52, which can read data from high-density optical recording media and CD discs, with CD compatibility and a simple system Architecture. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following describes the preferred embodiments in detail with the accompanying drawings as follows: Brief description of the drawings: FIG. 2A is a schematic diagram of a high-density optical recording medium according to a preferred embodiment of the present invention; FIG. 2A is a schematic diagram of a data track of a high-density optical recording medium according to a preferred embodiment of the present invention; FIG. 2B The figure shows a partial structure diagram of a high-density optical recording medium according to a preferred embodiment of the present invention; FIGS. 3A and 3B respectively show a high-density optical recording medium according to a preferred embodiment of the present invention. Schematic cross-section with single-layer and double-layer structures; Figure 4 shows the relationship between wavefront aberration and disc thickness; Figure 5 shows a high density (please refer to a preferred embodiment of the present invention, please Please read the precautions on the back before filling this page.) "Packing ---- Order --------- line. This paper size applies to China National Standard (CNS) A4 (210 X 297 male cage) 4 6 3 1 6 3 5 1 06ΐ \ v f '. D oc / 0 0 6 Λ7 R7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Schematic diagram of the reading and writing device of the invention's optical recording medium. Figures 6 and 7 show the CD specifications and DVD respectively. Eye diagrams obtained from a standard optical pickup; and FIGS. 8 and 9 respectively show eye diagrams obtained from two optical pickups conforming to the XVCD standard according to a preferred embodiment of the present invention. Explanation of the marks of the drawings: 100, 200, 200a, 300a, 300b, 500: optical disc 102: disc diameter_ 104: substrate thickness 202, 202a: data track 204: data track pitch 206: signal pit 208: signal pit Lengths 302, 302a, 302b: reflective layer 502 .: laser light source 504: beam splitter 506: collimator 508: turning mirror 510: objective lens 514: detector. The embodiment includes a CD specification and a DVD specification in the existing optical disc specifications. The diameter of the CD disc is 120 millimeters (mm), the capacity is 650MB, the thickness of the substrate is 1.2 millimeters, the track pitch is 1.6 micrometers (μΐΏ), and the minimum signal pit length is 7. The paper size applies to the Chinese National Standard (CNS) A4 specification ( 210 X 297 mm) f Eyes first read the back of the book; i will fill in this page before the matter) I installed ------ I I --- Order --------- 1 4 6 316 3 I 06 tw Γ doc ^) () 6 A7 B7 V. Description of the Invention ((ί) ^ is 0.833 microns, the wavelength of the laser light source used by the optical read head is 780 nanometers (nm), and the number of apertures of the objective lens is 0.45. The DVD disc also has a diameter of 120 mm, a capacity of 4.7 GB, a substrate thickness of 0.6 mm, a track pitch of 0.74 μm, a minimum signal pit length of 0.4 μm, and a laser light source wavelength used by its optical pickup head is 650. For nanometers, the numerical aperture of the objective lens is 0.6. Please refer to FIG. 1, which shows a schematic diagram of a high-density optical recording medium according to a preferred embodiment of the present invention. As shown in FIG. 1, The digital optical disc 100 for storing data has a circular dish-like appearance, and has a specific diameter 102 and a substrate thickness 104. The present invention The high-density optical recording medium is named Extra-Video Compact Disk (XVCD). The diameter 102 of the XVCD disc 100 is about 120 mm, which is the same as the CD and DVD discs, but the diameter 102 of the XVCD disc 100 can also be It is about 80 mm, and the thickness of the substrate is about L2 mm, which is the same as that of CD discs. '' Because the substrate thickness of CDs and DVDs is different, the CD / VCD disc production line must be completely replaced with equipment to carry out Production of DVD discs. However, the production line of CD / VCD discs can be directly mass-produced for XVCD discs without the need to change equipment, so the production cost can be reduced. Then referring to FIG. 2A, it shows a comparison according to the present invention. A preferred embodiment is a schematic diagram of a data track of a high-density optical recording medium. There are several data tracks 202 on a digital optical disc 200. 1 is located in a reflective layer for storing data, and each data track 202 is surrounded by a disc. The 200 center consists of several data cells. Referring to Figure 2B, the 8 paper sizes shown are applicable to China National Standard (CNS) A4 (210 X 297) Li) (Please read the precautions on the back before filling in this letter) -------- Order --------- line f Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperation Du Intellectual Property Bureau of the Ministry of Economic Affairs Printed by Employee Consumer Cooperative 16 316 3 λ? M06tut, do〇L.006 __ ^ __ V. Description of the Invention (7) is a schematic diagram of the partial structure of a high-density optical recording medium according to a preferred embodiment of the present invention The slice 200a has a plurality of data tracks 202a, each data track 202a has a specific track pitch 204 ', and each data track 202a has a plurality of signal pits 206', and each signal pit 206 has a different signal pit length 208. As shown in FIG. 2A and FIG. 2B, in the high-density optical recording medium of the present invention-XVCD, the track pitch 204 between its data tracks is between the CD specification (1.6 micron) and the DVD specification ( 0.74 micron), the preferred track pitch 204 is about 1.06 microns to 1.Π microns, and the minimum length of the signal pit 206 is also between the CD specification (0.833 microns) and the DVD specification (0.4 microns). The minimum length of the signal pit is about 0.5 6 microns to 0 613 microns. Please refer to FIG. 3A and FIG. 3B, which are schematic cross-sectional views of a high-density optical recording medium having a single-layer and a double-layer structure, respectively, according to a preferred embodiment of the present invention. As shown in FIG. 3A, in the XVCD optical disc 300a, there is a reflective layer 302 for storing data. The concave portion on the surface is a data track or data pit for recording data, and the surface of the reflective layer 302 and the optical disc The distance of the 300a surface is about 1.2 mm. In the XVCD disc 30 () a of the second circle, there are two reflective layers 302a and 302a, and the distance between the surface and the surface of the disc 300B is about millimeters and 1 15 millimeters, respectively.
請參照第4圖，其所繪示的是波面像差（Wavefn)m Aberration)與碟片厚度之關係圖。圖中之橫軸所代表的是 反射層與碟片表面之距離，而縱軸則是代表波面均方根値 (Root-Mean-Square Value) ARMS。在本發明中，具有雙層L ___^--------it--------訂---------線' (請先閱讀背面之注意事項再填寫本頁) ___ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 463彳6 3 S ! 06twr.Joe 006 A7 B7 五、發明說明（及） 反射層結構之XVCD，經由理論分析所得到之波面均方根 値約爲入射波長之0.0Π倍1亦即ARMS=0.0171。與波面 像差之關係圖比對，此一波面均方根値是在資料讀寫可允 許的範圍之內，因此在本發明之XVCD光碟可以製作兩層 資料層。如第4圖所示，其所對應之反射層與碟片表面距 離約爲1.15毫米。 根據本發明前述之XVCD規格，可以計算出具有單層 結構之XVCD光碟的容量約爲2.0GB至2.35GB，與習知技 藝的CD光碟僅具有650MB容量相較之下，本發明之高密 度光學記錄媒體的資料儲存容量增加了三倍以上。習知以 3片VCD光碟儲存之影音資料，僅需使用一片XVCD光碟 即可儲存及播放，因此可以節省生產所需的物料成本’並 可減少資源的消耗與浪費。而具有雙層結構之XVCD光碟 容量則更高達約爲4.0GB至4.7GB，與習知技藝的DVD光 碟之容量相當。 而第5圖所繪示的是依照本發明之較佳實施例，--種 高密度光學記錄媒體之讀寫裝置的結構示意圖。如第5圖 所示，高密度光學記錄媒體(XVCD光碟）之讀寫裝置例如 是光碟機或光學讀寫頭等1其中光源502例如是雷射光源， 而雷射光束由雷射光源502發出，透過分光鏡(Spliuer)504， 將其導向準直鏡（ColHmator)506 °光束經準直鏡506校準 後，再由轉折鏡（Folding Mirror)508將其方向偏轉，使其經 過物鏡510後，聚焦於光碟片500上。光束經光碟片5〇〇 反射後，經物鏡510、轉折鏡508及準直鏡506，由分光鏡 1 0 (請先閱讀背面之注意事項再填寫本頁) 4 t —! —IT----------線 f 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公楚） 經濟部智慧財產局員工消費合作社印製 4 6 316 3 # Λ7 S I OCitw 1. d oc 006 ____B7____ 五、發明說明（’） 504將光束導向檢測器（Photo Detector)514,以讀取光碟片 500的資料。在本發明之XVCD規格中雷射光源502所提 供之雷射波長的範圍介於CD規格（780毫微米）與DVD規 格（650毫微米），較佳的波長範圍約爲680毫微米至780毫 微米，而物鏡510之數値孔徑的範圍亦介於CD規格（0.45) 與DVD規格（0,6)之間’較佳的物鏡數値孔徑則約爲〇.5至 0.52。 習知的DVD讀取頭需要配置兩個具有不同波長之雷 射光源及/或兩個物鏡’其承載及機械架構較爲複雜。相較 之下’本發明符合XVCD規格之光學讀寫頭，僅需使用--個雷射光源（780毫微米）及一個物鏡，即可讀取CD/VCD 光碟及XVCD光碟中的資料，具有簡單的系統架構，且與 CD/VCD讀取頭完全相容。此外，在本發明之xvCD規格 中，其調變碼（Modulation Code)及錯誤修正碼（Ειτοι-Correction Code，ECC)資料格式是與DVD規格相同，而且 和CD規格相容。 讀寫裝置運作正常即可讀出光碟片上的資料，計算光 學讀寫頭所形成之光點，並以光點對光碟進行掃瞄，其原 始之類比信號經重覆掃瞄後，所得到的波形即是一般所謂 的眼形圖（Eye-Pattern)。請參照第6圖及第7圖，其所繪示 的是分別由CD規格及DVD規格光學讀取頭所獲得之眼形 圖；而第8圖與第9圖則繪示依照本發明之較佳實施例， 由兩種XVCD規格的光學讀取頭（XVCD-1及XVCD-2)所分 別獲得之眼形圖。 本紙張尺度適用中國國家標準（CNS)A4規格（21〇}<297公釐） - -----------J 裝--------訂 i -------線一 (請先閱讀背面之注意事項再填寫本頁) A7 B7 4 6 316 3 i〇6uvf.<.loc 0(H> 五、發明說明（/c?) 其中第6圖至第9圖之橫軸所代表的是時間，而縱軸 則是代表信號振幅，而這些信號分布由3 T至11 τ，其中T 爲單位時間。比較第8圖、第9圖與第6圖和第7圖可知， 依照本發明之光學讀寫頭(X VCD-1和XVCD-2)對所讀取之 訊號的靈敏度及鑑別能力，係介於CD規格與DVD規格之 間。 請參照第丨表，其所列示的是習知技藝中的CD規格 及DVD規格，以及本發明之XVCD規格（XVCD-1及XVCD-2) 的設定特性比較。 由上述本發明較佳實施例可知，應用本發明具有下列 優點： 1. 本發明之讀寫裝置係使用一個雷射光源及一個物鏡 即可讀取CD/VCD光碟與XVCD光碟中的資料，具有較簡 單的碟機系統架構。 2. 本發明之XVCD光碟的基板厚度與CD/VCD 光碟相同，不需改變光碟之基板厚度即可提升資料儲存容 量’因此CD/VCD光碟之生產線不需要更換機具，即可進 行本發明之XVCD光碟的量產，以降低生產成本。 3. 本發明可將光碟容量由CD/VCD光碟的650MB提升 至單層結構之XVCD光碟的2.0GB〜2,35GB，使用XVCD光 碟一片即可儲存以往需要3片SVCD光碟之資料，可以節 省物料成本，減少資源的浪費。 4. 具有單面雙層結構之XVCD光碟，其資料容量可以 更進一步提升至4.0GB〜4.7GB，與一般單面單層的DVD光 本紙張尺度適用中國國家標準（CNS)A4規格（21〇χ 297公Μ ) (請先閱讀背面之注意事項再填寫本頁) 裝---ft----訂—-- 線 經濟部智慧財產局員工消費合作社印製 A7 46316 3 5 Η) 61 νν f. d 〇 c ' 0 〇 6 五、發明說明（〇) 碟片相當，可用以取代單面單層結構的DVD光碟，Please refer to FIG. 4, which shows the relationship between the wavefront aberration and the thickness of the disc. The horizontal axis in the figure represents the distance between the reflective layer and the disc surface, and the vertical axis represents the Root-Mean-Square Value ARMS. In the present invention, there is a double-layer L ___ ^ -------- it -------- order --------- line '(Please read the precautions on the back before filling (This page) ___ This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) 463 彳 6 3 S! 06twr.Joe 006 A7 B7 V. Description of the invention (and) XVCD of the reflective layer structure, through theory The rms of the wavefront obtained by the analysis is approximately 0.0Π times 1 of the incident wavelength, that is, ARMS = 0.0171. Compared with the wavefront aberration diagram, this wavefront rms is within the allowable range of data reading and writing. Therefore, in the XVCD disc of the present invention, two data layers can be made. As shown in Figure 4, the distance between the corresponding reflective layer and the surface of the disc is about 1.15 mm. According to the foregoing XVCD specification of the present invention, it is possible to calculate that the capacity of an XVCD disc with a single layer structure is about 2.0GB to 2.35GB. Compared with the CD disc of the conventional technology, which has only 650MB capacity, the high-density optical The data storage capacity of recording media has more than tripled. It is known that the audio and video data stored on 3 VCD discs can be stored and played by using only one XVCD disc, so it can save the material cost required for production 'and reduce the consumption and waste of resources. The capacity of XVCD discs with double-layer structure is as high as about 4.0GB to 4.7GB, which is equivalent to the capacity of DVD discs of conventional technology. FIG. 5 is a schematic structural diagram of a read / write device for a high-density optical recording medium according to a preferred embodiment of the present invention. As shown in FIG. 5, the read / write device of the high-density optical recording medium (XVCD disc) is, for example, an optical disc drive or an optical read / write head. 1 The light source 502 is, for example, a laser light source, and the laser beam is emitted by the laser light source 502. After passing the beam splitter 504 and guiding it to a ColHmator 506 °, the beam is calibrated by the collimator 506, and then its direction is deflected by a folding mirror 508 to pass it through the objective lens 510. Focus on the optical disc 500. After the beam is reflected by the optical disc 500, it passes through the objective lens 510, the turning mirror 508, and the collimating lens 506, and then the beam splitter 10 (please read the precautions on the back before filling this page) 4 t —! —IT --- ------- Line f Printed by the Employees 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is printed in accordance with Chinese National Standard (CNS) A4 (210 X 297 Gongchu) Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 4 6 316 3 # Λ7 SI OCitw 1. d oc 006 ____B7____ 5. Description of the invention (') 504 directs the light beam to the detector (Photo Detector) 514 to read the data of the optical disc 500. In the XVCD specification of the present invention, the laser wavelength range provided by the laser light source 502 is between the CD specification (780 nm) and the DVD specification (650 nm), and the preferred wavelength range is about 680 nm to 780 nm The number of apertures of the objective lens 510 is also in the range of the CD specification (0.45) and the DVD specification (0,6). The better number of objective lenses is about 0.5 to 0.52. The conventional DVD read head needs to be configured with two laser light sources and / or two objective lenses with different wavelengths, and its bearing and mechanical structure are relatively complicated. In contrast, the optical read / write head conforming to the XVCD specification of the present invention can read data in CD / VCD discs and XVCD discs by using only a laser light source (780 nm) and an objective lens. Simple system architecture and fully compatible with CD / VCD read heads. In addition, in the xvCD standard of the present invention, the modulation code and error correction code (ECC) data format is the same as the DVD standard and is compatible with the CD standard. The reading and writing device can operate normally to read the data on the optical disc, calculate the light spot formed by the optical read-write head, and scan the optical disc with the light spot. After the original analog signal is scanned repeatedly, the obtained The waveform is the so-called Eye-Pattern. Please refer to FIG. 6 and FIG. 7, which show eye diagrams obtained by the CD-format and DVD-format optical read heads respectively; and FIG. 8 and FIG. 9 show comparisons according to the present invention In the preferred embodiment, the eye shape diagrams obtained by the two optical pickup heads of XVCD specifications (XVCD-1 and XVCD-2) are respectively obtained. This paper size applies to China National Standard (CNS) A4 specification (21〇) < 297 mm)------------ J Packing -------- Order i ---- --- Line 1 (Please read the precautions on the back before filling this page) A7 B7 4 6 316 3 i〇6uvf. ≪ .loc 0 (H > V. Description of the invention (/ c?) The horizontal axis of Figure 9 represents time, while the vertical axis represents signal amplitude, and these signal distributions range from 3 T to 11 τ, where T is the unit time. Compare Figure 8, Figure 9, and Figure 6 It can be seen from FIG. 7 that the sensitivity and discrimination capability of the optical read / write heads (X VCD-1 and XVCD-2) according to the present invention to the read signals are between the CD specification and the DVD specification. Please refer to Table, which lists the CD specifications and DVD specifications in the conventional art, and the comparison of the setting characteristics of the XVCD specifications (XVCD-1 and XVCD-2) of the present invention. From the above-mentioned preferred embodiments of the present invention, The application of the present invention has the following advantages: 1. The reading and writing device of the present invention can read data in CD / VCD discs and XVCD discs using a laser light source and an objective lens, and has a relatively simple disc player system architecture.The substrate thickness of the invented XVCD disc is the same as that of the CD / VCD disc, and the data storage capacity can be increased without changing the substrate thickness of the disc. Therefore, the production line of the CD / VCD disc can be carried out without the need to change tools. Production to reduce production costs. 3. The present invention can increase the optical disc capacity from 650MB of CD / VCD discs to 2.0GB ~ 2,35GB of XVCD discs in a single layer structure. Using one XVCD disc can store 3 SVCDs that were previously required The data of the optical disc can save material costs and reduce the waste of resources. 4. With a single-sided double-layer XVCD disc, its data capacity can be further increased to 4.0GB ~ 4.7GB, which is the same as the ordinary single-sided single-layer DVD optical book. The paper size applies the Chinese National Standard (CNS) A4 specification (21〇χ297297M) (Please read the precautions on the back before filling out this page) Loading --- ft ---- Order --- Intellectual Property of the Ministry of Economic Affairs Printed by the Consumer Cooperatives of the Bureau A7 46316 3 5 c) 61 νν f. D occ '0 〇6 V. Description of the invention (〇) The discs are equivalent and can be used to replace single-sided single-layer DVD discs.
第1表習知技藝與2 卜發明之光碟規格設定 CD DVD XVCD-1 XVCD-2 物鏡數値孔徑 0.45 0.6 0.5 0.5 雷射光源波長 (毫微米） 780 650 780 780 資料軌軌距 (微米） 1.6 0.74 1.13 1.06 訊號坑最小長度 (微米） 0.833 0.4 0.613 0.56 碟片直徑（毫米） 120 120 1·20 120 基板厚度（毫米） 1.2 0.6 1.2 1.2 資料容量 650MB 4.7GB 2.0GB/ 4.0GB 2.35GB/ 4.7GB -------------^t--------訂---------線- (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 雖然本發明已以較佳實施例揭露如上，然其並非用以 限定本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍内，當可作各種之更動與潤飾，因此本發明之保護 範圍當視後附之申請專利範圍所界定者爲準。 本紙張尺度適用中國國家標準（CNS)A4規格（2]0 X 297公釐）Table 1 Known Skills and 2 CD-ROM Specification Setting of Invention CD DVD XVCD-1 XVCD-2 Number of Objective Lenses 0.45 0.6 0.5 0.5 Wavelength of Laser Light Source (nm) 780 650 780 780 Data Track Pitch (Micron) 1.6 0.74 1.13 1.06 Minimum signal pit length (micron) 0.833 0.4 0.613 0.56 Disc diameter (mm) 120 120 1 · 20 120 Substrate thickness (mm) 1.2 0.6 1.2 1.2 Data capacity 650MB 4.7GB 2.0GB / 4.0GB 2.35GB / 4.7GB ------------- ^ t -------- Order --------- line- (Please read the notes on the back before filling this page) Ministry of Economic Affairs Printed by the Intellectual Property Bureau's Consumer Cooperatives Although the present invention has been disclosed above in a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make various changes without departing from the spirit and scope of the present invention. Changes and retouching, therefore, the scope of protection of the present invention shall be determined by the scope of the appended patent application. This paper size applies to China National Standard (CNS) A4 (2) 0 X 297 mm