TW479247B - Multi-element detector for use reading multiple tracks of optical disks having diverse formats - Google Patents

Multi-element detector for use reading multiple tracks of optical disks having diverse formats Download PDF

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Publication number
TW479247B
TW479247B TW89127129A TW89127129A TW479247B TW 479247 B TW479247 B TW 479247B TW 89127129 A TW89127129 A TW 89127129A TW 89127129 A TW89127129 A TW 89127129A TW 479247 B TW479247 B TW 479247B
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Taiwan
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detector
optical
light
reading
scope
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TW89127129A
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Chinese (zh)
Inventor
Tatiana Tania Kosoburd
Jacob Finkelstein
Eliyahu Chachamov
Itzhak Katz
Michael Naor
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Zen Res Ireland Ltd
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0909—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by astigmatic methods

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

Apparatus and methods are provided for using a single multi-element detector to simultaneously read multiple tracks from either a CD disk or a DVD disk. The multi-element detector has a staggered arrangement and includes elongated detector elements, so that multiple reading beams reflected from multiple tracks of a CD disk are projected onto the detector, as are multiple reading beams reflected from multiple tracks of a DVD disk. An optical pickup using the multi-element detector of the present invention also is described.

Description

479247 五、發明說明（1) 發明範疇 本取一光碟片的多重軌道 ϋ :糸關於-多重元件偵测器陣列，1用ί 一光碟機中，藉以同時讀取來自CD &DVD 徙、; 多重執道。 拾式的先碟機的 發明背景 由於光碟片的高容量密度，較長的資 低的成本，使其成為主要的散佈資訊的媒體相當 言，該雷射碟片（CD)格式，苴開菸乃施良格式。舉例而 [其已取代了乙稀4。類===來^音樂錄 f媒體’例如CD-_，其已普遍用於個人；腦=料； 來散佈軟體及資料庫。誃dvd 冤知項域中，用 做為散佈影像資訊的媒體$ / 、地取代錄影帶， 的驅動器也在個人電= f二Ϊ外，能夠讀取DVD碟片 用於軟體的散佈。中愈來愈普及’且则格式也開始 雖然DVD碟片具有比⑶雄u苗丄 片卻是在目前更為普及的'一大的資料儲存容量，CD碟 資料的媒體。因此，為了政佈軟體及其它電腦可讀取 機最好是能夠同時讀取DVD地^市場上保證成功，光碟 式之間的實際差異，像曰在碟雄片及〇碟片。然而，這些格 間距），該資料特徵的尺”片上執道之間的間隔（軌道 的純淨基板的深度，用於钱凹痕）’覆盍該碟片反射表面 要能夠讀取兩種形式碟片該碟片的光線波長等，皆需 碟片袼式的驅動器更為$ &、碟機成為比僅能夠讀取單一 〃 例如Katayama所有的美國專479247 V. Description of the invention (1) The scope of the invention The present invention takes multiple tracks of an optical disc ϋ: 糸 About-multiple element detector array, 1 uses a disc drive to read from CD & DVD migration at the same time; Multiple ways. Background of the invention of the pick-up disc player Due to the high capacity density of the optical disc and the relatively low cost, it has become the main media for disseminating information. The laser disc (CD) format Is Shiliang format. For example, [It has replaced ethylene 4. Type === 来 ^ Music Records fMedia ’such as CD-_, which has been widely used by individuals; brain = data; to distribute software and databases. In the DVD domain, the media used to distribute image information $ /, instead of video tapes, the drive is also personal electric = f, can read DVD discs for software distribution. "China is becoming more and more popular" and the format has also begun. Although DVD discs are more popular than CD male videos, they are now a "large data storage capacity, CD media." Therefore, for government software and other computer readable machines, it is best to be able to read DVDs at the same time. On the market to ensure success, the actual differences between optical disc formats, such as discs and discs. However, the space between these grids), the characteristics of the data on the ruler, the interval between the tracks (the depth of the pure substrate of the track, used for money dents) 'covering the reflective surface of the disc to be able to read both types of discs The light wavelength of the disc, etc., requires a disc-type drive that is more expensive, and the disc drive is more than capable of reading only a single disc. For example, all the U.S. specialties of Katayama

第6頁 479247 五、發明說明（2) 利編號5，696，750 ’其提出^一種具有同時讀取CD及DVD碟片 的共用反射光線光學路徑的系統。 μ 實際上’一光碟片的資料承載部份包含一系列的凹痕或 凸塊’經配置而形成一螺旋軌道。資料即編碼到個別凹痕 的長度’及凹痕之間空隙的長度。一光學拾取總成係藉由 反射來自該光碟片的一雷射光束來讀取資料。由於該;^片 是旋轉的，該雷射光束係交替地由該凹痕及凹痕之間的空 隙來反射。此即造成反射的雷射光束之間可辨識出的差 別，其可被偵測及解碼來回復儲存在該光碟片上的資料。 如同此處所使用的，一資料軌道為對應於一光碟片的單 一旋轉之該螺旋資料軌道的一部份。一種能夠讀取多重資 料軌道的驅動器，立即同時地讀取該螺旋執道的多個部 份。對於具有多重共中心的螺旋執道之碟片，一資料軌道 表示一個該共中心螺旋軌道的一個旋轉。對於具有共中心 圓形軌道的光碟片，一資料軌道係指這樣的圓形執道。 由Alon等人所提出的美國專利編號5,793,549，其提出 一種光碟讀取器，其可同時讀取多重資料軌道，例如使用 多重雷射光束。該多重雷射光束係使用一繞射格柵來分離 一單一光束，或是提供多重雷射光源所得到，其係對焦及 對準於該光碟的相對應軌道。然後該反射光束即被偵測及 解碼。因此，在一碟片驅動器中以6倍於標準速度旋轉的 碟片，一次可讀取10個軌道，其提供了相當於一 60倍速單 一光束驅動器的資料速率，但不會有關於高旋轉速度的複 雜性。Page 6 479247 V. Description of the invention (2) Lee No. 5,696,750 'proposes a system having a common optical path of reflected light for reading CD and DVD discs simultaneously. μ In fact, the data bearing portion of a disc contains a series of dents or bumps, which are configured to form a spiral track. The data is encoded to the length of the individual dents' and the length of the gap between the dents. An optical pickup assembly reads data by reflecting a laser beam from the optical disc. Since the ^ sheet is rotating, the laser beam is alternately reflected by the dent and the gap between the dents. This results in a discernable difference between the reflected laser beams, which can be detected and decoded to recover the data stored on the disc. As used herein, a data track is part of the spiral data track corresponding to a single rotation of an optical disc. A drive capable of reading multiple data tracks reads multiple portions of the spiral track simultaneously and simultaneously. For discs with multiple concentric spiral tracks, a data track represents a rotation of the concentric spiral track. For discs with a concentric circular track, a data track refers to such a circular track. U.S. Patent No. 5,793,549, by Alon et al., Proposes an optical disc reader that can simultaneously read multiple data tracks, such as using multiple laser beams. The multiple laser beam is obtained by using a diffraction grating to separate a single beam or by providing multiple laser light sources, which are focused and aligned on corresponding tracks of the optical disc. The reflected beam is then detected and decoded. Therefore, a disc rotating at 6 times the standard speed in a disc drive can read 10 tracks at a time, which provides a data rate equivalent to that of a single beam drive at 60 times speed, but there is nothing about high rotation speed Complexity.

第7頁 479247 五、發明說明（3) 除了對準於該資料執道之外’在一多重光束光 中的光束必須彼此之間維持在特定的距離，鞋;^ ^取职 擾，並適當地對準該光束及偵測器。這此距M ， 的空隙（即軌道間距），光學信號的放大， =軌= ㈣器尺寸及空隙來決定。基本上，該最小空 間隙要大，其需要多重雷射光束來在相對於 '二 == 周及徑向上配置。 /碼片的圓 一CD形式的碟片之軌道間距大約為16微米 式的碟片之軌道間距則大約為〇, 74微米。對於一夕VD 2 系統，其必須西己置及對準該光束來使得每個光二隹t 執道上，並配置該摘測器使得每個反射自—光二二 皆投影到一偵測器上。因為DVD及⑶形式的'，先束 是不同的’對於同時讀取一DVD形式碟片的多重t:= 統中，該光束的空隙及該谓測器的 、的糸 取-CD形式碟片的多重執 ：該同時讀 。此為造成建構同時讀取c:及 :::學驅動器時的獨特的困難。因二、的僅 相乘’因為該非中心光束的門斤使用的偵測器數目 因為用於讀取_ 2種格式是不同的。 個），並使用—光/八^有兩雷射二極體（每個波長一 隔的配置可在該兩個刀^态來結合光束。因此，該光束間 組合之前來處‘：但：射2獨立光學路徑被該光束分離器 一疋，其很困難，而且很昂貴地來提供 479247Page 7 479247 V. Description of the invention (3) In addition to aligning with the material, the beams in a multiple beam light must be maintained at a specific distance from each other, shoes; ^ ^ take job disturbances, and Properly align the beam and detector. The distance between the distance M and the track distance, the amplification of the optical signal, = track = the size of the tool and the gap are determined. Basically, the minimum gap is large, which requires multiple laser beams to be arranged in a circle and a radial direction with respect to 'two =='. The circle pitch of a CD-shaped disc is about 16 micrometers. The track pitch of a disc is about 0.74 micrometers. For the overnight VD 2 system, it must be positioned and aligned so that each light beam can be on the road, and the picker is configured so that each reflected self-light beam 22 is projected onto a detector . Because of the DVD and CD format, the first beam is different. For multiple t: = systems that read a DVD format disc at the same time, the gap between the beam and the grabber-CD format disc of the tester. Multiple executions: read at the same time. This is a unique difficulty in constructing simultaneous reads of c: and ::: drives. Because of the multiplication of the two, because the number of detectors used by the non-center beam key, the two formats used for reading are different. ), And the use of-light / eight ^ has two laser diodes (a configuration with a separation of each wavelength can combine the beams in the two knife states. Therefore, before the combination between the beams': but: The 2 independent optical paths are shot by the beam splitter, which is difficult and expensive to provide 479247

反射自該光碟片的獨立的光線之光學路徑，並 同的在偵測器元件之間具有不同間距的偵測器。 、、且不 因此，其有需要來提供使用一單一多重元;伯 门 時讀取CD及DVD形式光碟片的多重軌道的方法及裝'置。朿同 另外也有需要來提供一種多重元件偵測器，1<可° 時讀取CD及DVD形式碟片的多重執道。 八 於同 發明概述 根據上述，本發明的一種目的是來提供使用一單一 元件偵測器來同時讀取CD及DVD形式光碟片的 方法及裝置。 、的 本發明的另一個目的是來提供一種多重元件偵測界，直 可用於同時讀取CD及DVD形式碟片的多重軌道。 八 本發明的這些及其它目的是由提供一種包含一加長偵測 器元件之陣列的-多重元件债測器來達到，其中相鄰的偵 測器元件是以預定的距離相互交肖，並可彼此之間由預定 的距離偏移。&射自-CD碟片的多重軌道的多重讀取光束 =射到該多重元件偵測器上，其間隔及角度可使每個光 束皆投射到該多重偵測器的一個偵測器元件上。類似地， 反射自一DVD_碟片的多重軌道的多重讀取光束係被投射到 相同的多重兀件偵測器’其間隔及角度可使每個讀取光束 對應到一個偵測器元件。 該多重元件偵測器的一中央偵測器元件可被分成四個偵 測器正段，而做為-四象限偵測器，其產生散光聚焦錯誤 乜唬及軌道彳S唬。此外，最外面的兩個偵測器元件可被分Independent optical paths of light reflected from the disc, and detectors having different spacings between the detector elements. Therefore, it is necessary to provide a method and a device for reading multiple tracks of CD and DVD discs using a single multi-element. It is also necessary to provide a multi-component detector that can read CD and DVD discs at multiple times. SUMMARY OF THE INVENTION According to the foregoing, it is an object of the present invention to provide a method and apparatus for reading a CD and a DVD disc simultaneously using a single component detector. Another object of the present invention is to provide a multi-component detection field that can be used to read multiple tracks of CD and DVD discs simultaneously. These and other objects of the present invention are achieved by providing a multi-component debt detector including an array of extended detector elements, wherein adjacent detector elements intersect with each other at a predetermined distance, and They are offset from each other by a predetermined distance. & Multiple read beams of multiple tracks shot from -CD disc = shot onto the multiple element detector, and its spacing and angle allow each beam to be projected onto a detector element of the multiple detector on. Similarly, the multiple read beams reflected from the multiple tracks of a DVD_disc are projected to the same multiple element detector '. The spacing and angle of each read beam correspond to one detector element. A central detector element of the multi-element detector can be divided into four positive sections of the detector, and as a four-quadrant detector, it generates astigmatism focus errors and orbits. In addition, the two outermost detector elements can be divided

479247 五、發明說明（5) 成兩個正段，其用於提供用於讀取一dvd碟片的多重軌道 的該多重讀取光束的錯誤信號放大，或是做為干擾修正。 本發明的多重元件偵測器係配合具有兩個獨立光學路徑 的一光學拾取頭來產生讀取光束，其包含適當的波長，= 距^角度來讀取一CD碟片或一DVD碟片。其使用一光束分曰 ，器來在產生該讀取光束之後，結合這些光學路徑成為刀一 早一光學路徑。一全像攝影光學元件允許達到將具有讀取 CD碟片的波長的讀取光束聚焦到一CD碟片上，並可將讀取 光束聚焦到一DVD碟片上，使其波長適於讀取DVD碟 _圖式簡單說明 、479247 V. Description of the invention (5) Two positive segments are used to provide error signal amplification of the multiple read beam for reading multiple tracks of a DVD disc, or to correct interference. The multi-element detector of the present invention cooperates with an optical pick-up head having two independent optical paths to generate a reading light beam, which contains an appropriate wavelength, and a distance ^ angle to read a CD disc or a DVD disc. It uses a beam splitter to combine these optical paths into a knife-to-earth optical path after generating the reading beam. A holographic photographic optic allows focusing a reading beam having a wavelength to read a CD disc onto a CD disc, and focusing the reading beam onto a DVD disc, making its wavelength suitable for reading DVD disc_illustration,

本發明的上述及其它目的及好處 明及配合所附圖面而可更加瞭解， 有類似的部份，且其中： ，可藉由以下的詳細說 其中類似的符號代表所 圖1所示為適用於本發明的一多 簡化表不； 重光束光學拾取頭的一 圖2所示為用於圖1的多重光束光 光學元件； 學拾取頭的一全像攝影 圖3A及3B所示分別為投影到 份上的多重讀取光束； 圖3C所示為反射自一π碟片及一 Dvj)碟片的 CD碟片及一DVD碟片一部 點，以及本發明的該多重 的一偵測裔70件的方向； 圖4所示為根據本發明的原理所建構 盟· 傅的夕重70件偵測 ，The above and other objects and benefits of the present invention can be more clearly understood and matched with the drawings. There are similar parts, and among them:, the following symbols can be used to describe in detail. The similar symbols represent the application shown in FIG. 1 as applicable. A simplified representation of the present invention; FIG. 2 of a heavy-beam optical pickup head is shown in FIG. 2 as a multiple-beam optical-optical element used in FIG. 1; Multiple reading beams on the component; FIG. 3C shows a CD disc and a DVD disc reflected from a π disc and a Dvj disc, and the multiple one detection source of the present invention. The direction of 70 pieces; Fig. 4 shows the detection of 70 pieces of Xun Fu's weight built by the principle of the present invention.

479247 五、發明說明（6) 圖5所示為反射自一CD碟片及一DVD碟片的光點被投射到 圖4的該多重元件偵測器；及 圖6及7所示為根據本發明原理所建構的一多重元件偵測 器的另一個具體實施例，其光點係反射自一CD &dvd 片。 ’、 #明詳細J兒明 明>1考圖1，其所示為雙重路徑多重光束光學讀取頭ίο 的簡化圖面，其係根據本發明的原理所建構。光學讀取 頭10可用於讀取光碟片2〇，其可為一⑶格式或一dvd格式479247 V. Description of the invention (6) FIG. 5 shows that the light spots reflected from a CD disc and a DVD disc are projected to the multi-component detector of FIG. 4; and FIGS. 6 and 7 are shown in accordance with the present invention. According to another embodiment of the multiple element detector constructed by the principle of the invention, the light spot is reflected from a CD & DVD. ', # 明 Details J 儿 明明> 1 Consider FIG. 1, which shows a simplified diagram of a dual-path multiple-beam optical pickup head ο, which is constructed in accordance with the principles of the present invention. The optical pickup head 10 can be used to read the optical disc 20, which can be a CD format or a DVD format

碟片。除了偵測器2 2，光學拾取頭丨0的個別元件可包含用 於先前已知光碟片讀取器的元件。 光源11，基本上為一雷射二極體，其可選擇來產生具有 一=一波長的光束，其適於讀取第一形式的光學媒體。為 了項取-CD.>{’光源“較佳地是產生一具有785㈣波長 的光束。類似地，光源12，基本上為一雷射二極體，其可 選擇來產生具有一第二波長的光束，其適於讀取一第二形 式的光學媒體。為了讀取一_碟片，光源12較佳地是產 生一具有658 nm波長的光束。Discs. In addition to the detector 22, individual components of the optical pickup head 0 may include components for previously known optical disc readers. The light source 11 is basically a laser diode, which can be selected to generate a light beam having a wavelength = 1 which is suitable for reading a first form of optical medium. For the purpose of -CD. ≫ {'light source' preferably produces a light beam having a wavelength of 785 ㈣. Similarly, the light source 12, which is basically a laser diode, can be selected to generate a second wavelength The light source is suitable for reading a second form of optical media. In order to read a disc, the light source 12 preferably generates a light beam having a wavelength of 658 nm.

來自光源11的光線穿過繞射元件13，其分離光束到多重 讀取光束’並在相鄰光束之間以一第—預定的距離來間 隔，並對準於相對於一光碟片的徑向方向之一第一角度， 所以每個多重讀取光束將可射入在第一形式的光碟片（如 -CD碟片）的-對應軌道上。類似地，由光源12所產生的 該光束係由繞射元件14分開成乡重讀取光束。由繞射元件 479247 五、發明說明（7) 1 4所產生的讀取光束係由一第二預定距離所隔開，並對準 於相對於一光碟片的徑向方向之一第二角度，所以每個讀 取光束將可射入到在該第二形式的光碟片（如一DVj)碟片） 上的一對應執道上。The light from the light source 11 passes through the diffractive element 13, which separates the light beam into multiple reading light beams and is spaced at a first-predetermined distance between adjacent light beams, and is aligned in a radial direction relative to a disc One of the directions is a first angle, so each multiple read beam can be incident on the corresponding track of the first form of optical disc (eg, a CD disc). Similarly, the light beam generated by the light source 12 is divided into a country-specific reading beam by the diffractive element 14. Diffraction element 479247 V. Description of invention (7) 1 4 The reading light beam is separated by a second predetermined distance and aligned with a second angle relative to a radial direction of an optical disc, Therefore, each reading beam can be incident on a corresponding channel on the second-type optical disc (such as a DVj) disc.

在來自光源11或12的光束分別由繞射元件η或μ分開成 多重讀取光束之後’該多重讀取光束即穿過光束分離器 1 5 ’其結合了光源11及1 2所產生的光線的獨立光學路徑成 為一單一光學路徑。當由光源12反射該光束時，光束分離 器1 5即將該光束由光源11傳送通過該光束分離器，所以來 自任一光源的光線即共享一共用光學路徑。光束分離器j 5 較佳地是包含一雙重的光束分離器，其傳送具有第一波長 的光線’並反射具有第二波長的光線。另外，光束分離器 16可包含一典型的半鍍銀鏡的光束分離器，或一極性化的 光束分離器’其假設來自光源11的該光線的極性化會不同 於來自光源1 2的該光線。After the light beam from the light source 11 or 12 is divided into multiple read beams by the diffraction element η or μ, respectively, 'the multiple read beam passes through the beam splitter 1 5', which combines the light generated by the light sources 11 and 12 The independent optical path becomes a single optical path. When the light beam is reflected by the light source 12, the beam splitter 15 transmits the light beam through the beam splitter from the light source 11, so the light from any light source shares a common optical path. The beam splitter j 5 preferably includes a dual beam splitter that transmits light having a first wavelength 'and reflects light having a second wavelength. In addition, the beam splitter 16 may include a typical half-silvered beam splitter, or a polarized beam splitter 'which assumes that the polarization of the light from the light source 11 will be different from the light from the light source 12.

接著’該讀取光束穿過光束分離器16，及準直儀17，並 由物件1 8 t焦到光碟片2 0的表面上，來投射繞射有限光點 到光碟片20的表面上。如果需要多重光束光學系統1〇來讀 取具有不同厚度的透明基板的兩種不同形式的光學媒體， 例如DVD及CD碟片，該讀取光束必須在穿過物件18之前來 穿過全像攝影光學元件（H0E) 19。H〇E 19被分開成兩個部 份-内部及外部。HOE 1 9的内部設計可使得具有第一波長 的光線由物件1 8聚焦到第一種形式的光學媒體上，而具有 第二波長的光線可由相同物件丨8聚焦到第二種形式的光學Then, the reading beam passes through the beam splitter 16 and the collimator 17 and is focused by the object 18 t onto the surface of the optical disc 20 to project a diffraction limited light spot onto the surface of the optical disc 20. If a multi-beam optical system 10 is required to read two different forms of optical media, such as DVDs and CDs, with transparent substrates of different thicknesses, the reading beam must pass through the hologram before passing through the object 18 Optical element (H0E) 19. HOE 19 is divided into two parts-inside and outside. The internal design of HOE 1 9 enables the light with the first wavelength to be focused on the first form of optical media by the object 18, while the light with the second wavelength can be focused on the second form of optical by the same object.

第12頁 4/^247 五、發明說明（8) :體上。因此’臓19的内部可有效地形成 :具有第-波長光線的光學特性係不同於具有j二 二線。—具有_ i 9的内部之特性的一全像攝，二:件Page 12 4 / ^ 247 V. Description of the Invention (8): Physically. Therefore, the interior of '臓 19 can be effectively formed: the optical characteristics of the light having the first wavelength are different from those having the j-second line. —A holographic camera with the internal characteristics of _ i 9

hoe 19料部之設計可使其對具有第二波 綠L 任何效果·(其用於讀取一勵碟片），並限制 〜線光又有 ，接物透鏡的數值光圈(其用於讀取一c 波= :之之任何部份皆被導引離=光學 u以其形成-大直徑環。所卩，物件18的外部對於投 射在第一形式之光學媒體（CD碟片）之光點沒有任何作用。 光碟片20包含一反射層，其中資料即儲存在該 的凹痕的形式（或凸起）。另外，一些可記錄光碟片使 反射層材料的物理或化學性質，或其能力來極性化入 光，藉以記錄資料。 聚焦在光碟片20的讀取光束係由該反射層所反射，並由 其中記錄的資料來調變。該反射的光束行進返回通過接物 透鏡18，H0E 19，及準直儀17，並由光束分離器16導向朝 向聚焦元件21及多重元件偵測器22。聚焦元件21為一全像 攝影兀件，其將導致至少中心讀取光束的繞射，所以可使 用一繞射聚焦偵測器。根據本發明的原理，多重元件偵測 器22丄其在下面將做詳細說明，其包含多重光學偵測器元 件’每個皆偵測反射自光碟片2〇的一對應轨道的光線強 度。一個多重元件偵測器22的光學偵測器元件，較佳地是 一中心元俾，装可白.A _ ™ Λ时A.，口Λ μ .· 、〇.，甘々^ y^iThe design of the material part of hoe 19 can make it have any effect on the second wave of green L. (It is used to read an exciting disc), and it is limited to ~ linear light, and the numerical aperture of the lens Take a c wave =: any part of it is guided away = optical u forms a large-diameter ring. Therefore, the outside of the object 18 is for the light projected on the first form of optical media (CD disc) The dots have no effect. The optical disc 20 includes a reflective layer in which data is stored in the form of dents (or protrusions). In addition, some recordable optical discs make the physical or chemical properties of the reflective layer material, or their capabilities The polarized incoming light is used to record data. The reading beam focused on the optical disc 20 is reflected by the reflective layer and modulated by the recorded data. The reflected beam travels back through the object lens 18, H0E 19, and collimator 17, and is directed by the beam splitter 16 toward the focusing element 21 and the multi-element detector 22. The focusing element 21 is a holographic photographic element that will cause diffraction of at least the central reading beam, So a diffraction focus detector can be used. According to the principle of the present invention, the multiple element detector 22, which will be described in detail below, includes multiple optical detector elements, each of which detects the intensity of light reflected from a corresponding track of the optical disc 20. One The optical detector element of the multi-element detector 22 is preferably a central element, which can be white. A _ ™ Λ 时 A., mouth Λ μ. ·, 〇, Gan ^ y ^ i

執道錯誤。 多重 信號。 理電路 回復記 成適用 碟讀取 本技 全像攝 一極性 該光學 反射 不論其 重元件 第一形 道間距 元件偵測器22提供對應 例如前述在授權給美國 ，在此引用做為參考， 錄在該光碟片上的資料 於一電腦或其它處理裝 為及電腦或其它處理裝 藝的專業人士將可瞭解 影元件。此外，光束分 化光束分離器。此外， 組件的物理配置進行改 自光碟片20的光束被導 是由何種碟片格式所反 债測器22係設計來處理 式的光學媒體及第二形 ，如如CD及DVD碟片。 於撞擊於其上的光束之電子 專利編號5, 627, 805中的處 其解碼並處理該電子信號來 。額外的電路將該資料轉換 置的一種格式，並做為該光 置之間的介面。The wrong way. Multiple signals. The reply of the management circuit is recorded as applicable to the disc reading. This technology takes a polar image, the optical reflection, regardless of its heavy element, the first track pitch, and the element detector 22 provides the correspondence. Professionals in computer or other processing equipment will be able to understand the video components on the disc. In addition, the beam splitter is a beam splitter. In addition, the physical configuration of the module is modified by the disc format in which the optical beam is guided. The detector 22 is designed to process optical media and second forms such as CD and DVD discs. The electron in the light beam impinging on it decodes and processes the electronic signal in Patent No. 5,627,805. The extra circuit converts the data into a format and uses it as an interface between the light locations.

，繞射元件1 3及1 4另可包含 離器16可包含一半鍍銀鏡或 可對多重光束光學系統1 〇的 變，而不背離本發明。 向朝向多重元件偵測器2 2， 射。根據本發明的原理，多 不同的光學媒體格式，其中 式的光學媒體具有不同的軌The diffractive elements 13 and 14 may further include a separator 16 which may include a half silver-plated mirror or may change the multi-beam optical system 10 without departing from the present invention. Shoot towards the multi-element detector 2 2. According to the principle of the present invention, there are many different optical media formats, where the optical media have different tracks.

圖2為H0E 1 9的更詳細圖示。如前所述，HOE 1 9包含内 部26及外部28。内部26係設計來使具有第一波長的光線與 具有第二波長的光線含有不同的光學性質，所以具有第一 波長的光線可以由物件18聚焦到第一形式的光學媒體，而 具有第二波長的光線則由相同的物件18聚焦在第二形式的 光學媒體上。外部28對於具有第二波長的光線沒有影響， 並由導引具有第一波長的光線離開該光學軸來限制物件i 8 的數值光圈，所以物件丨8的外部即對投射在該第一形式光Figure 2 is a more detailed illustration of H0E 1 9. As mentioned earlier, HOE 1 9 includes an inner portion 26 and an outer portion 28. The internal 26 series is designed to make the light with the first wavelength and the light with the second wavelength contain different optical properties, so the light with the first wavelength can be focused by the object 18 to the first form of optical media, and has the second wavelength The light is focused by the same object 18 onto a second form of optical medium. The outer 28 has no effect on the light with the second wavelength, and the numerical aperture of the object i 8 is limited by guiding the light with the first wavelength away from the optical axis, so the outside of the object 8 is projected on the first form of light

4/^247 五、發明說明（10) 學媒體上的光點沒有影響。 對於DVD碟片及CD碟片之光束間隔差異係示於圖3A及 3B。在圖3A中，光點3〇a_3〇g係投射在具有16微米的軌道 ”碟片的執道上。在圖3"，光點仏-咖係投射 在具有0.74微米的軌道間距之DVD碟片的軌道上。 f =及3B所示的光點列的角度僅是用來說明投射到光 成μ ,二面上的光點列，可相對於該碟片的半徑方向依據 而具有不同的角度。在一實際的系統中，該角度 :企Γ夕，基本上由半徑方向會高於80。，使得該光點列 掸妒：：3光碟片20。其必須使用的角度係根據要讀取的 須能夠避免光束之間的雜音及其它干擾 i i i: 距離，及該偵測器的間距來決定。 夕=項株抽i=角度可以調整來使得當該反射光束成像在 ΐ射：-CD: ^上時，在對準兩個不同的軌道間距時， 2 ^ vu - __ ,' 的光點及投射在一DVD碟片上的光點即 隔：：：軸上相同的間隔，及沿著另外-軸上的變化間 k此係不於圖3C，其顯示投射在 取光束的列P，投射在—CD禅Μ卜的夕舌=上的夕重項 測器元件R，並顯示哼多* :土 '夕重光束的列Q，及偵 的對準。在圖上可看：二t!广22的該偵測器元件 種不同的執道間距，但去射/上=光點即對準於兩 哭分杜I? r主外丄1 田才又射到夕重70件偵測器2 2的偵測 二=Λ，:束 π 軸i且有相ϋ 5者垂直於該摘測器元_的長方向的 ，、有相專的間隔。此係由適當的繞射元件13及14，及 第15頁4 / ^ 247 V. Description of the invention (10) The light spot on the learning media has no effect. The difference in beam spacing for DVD discs and CD discs is shown in Figures 3A and 3B. In FIG. 3A, a light spot 30a_30g is projected on the track of a disc having a 16 micron track. In FIG. 3 " The angle of the light spot array shown by f = and 3B is only used to describe the light spot array projected onto the light μ. The light spot array on the two sides can have different angles relative to the radial direction of the disc. In an actual system, the angle: Qi xi is basically higher than 80 ° in the radial direction, making the light spot array jealous: 3 discs 20. The angle that must be used is based on the reading The noise must be able to avoid noise and other interference between the beams. Iii: The distance and the distance between the detectors are determined. Xi = Xiang Zhu i = the angle can be adjusted so that when the reflected beam is imaged in a burst: -CD: When ^ is on, when aligning two different track pitches, 2 ^ vu-__, 'the light spot and the light spot projected on a DVD disc are separated by ::: the same interval on the axis, and along In addition, the variation on the axis k is not the same as that in FIG. 3C, which shows that the beam P is projected on the beam-taking column, and is projected on the CD-CD Xi Tong = Xiang heavy item detector element R, and display humor *: '' Xi heavy beam column Q, and the alignment of the detector. You can see on the picture: the detector of the two t! Guang 22 The components have different execution distances, but the shot / up = the light spot is aligned with the two crying points I? R main outer ring 1 Tian Cai shot again to the 70-weight detector 2 2 detection 2 = Λ ,: beam π axis i with relative angles 5 which are perpendicular to the long direction of the picker element _, with specific intervals. This is made of appropriate diffractive elements 13 and 14, and page 15

其係藉由其對準或旋 夕重元件偵測器2 2的設計來達到 轉。 圖4所示為根據本發明原理所建構一七光束系統的多重 二件m。多重元们貞測㈣包含偵測器元件術_ 衝’每個皆偵測反射自一對應的光碟執道的光線。每個 凡件40'，4013’40(：，406,4(^及40§皆具有長度11，寬度¥ 的加長形狀。相鄰的多重元件偵測器22的元件係以一預定 的間隔s來彼此㈣，並且由―相對於相鄰元件的預定距 離V來交錯及偏移。在一較佳具體實施例中，w大約是5〇微 米，h大約是120微米，V大約是4. 2微米，而s大約是9.8微 米。 如此處所使用的，偵測器元件的交錯配置是其中一元件 的上緣或下緣與其相鄰元件的上緣或下緣沿著一軸上有不 同的位置。元件係沿著一軸上而彼此偏離，如果其中心係 延著該軸而被不同地放置。因此，偵測器元件4〇&一4〇g皆 因為其上緣及下緣具有不同的垂直位置而被交錯，並因其 中心放置在不同的垂直位置上而被偏移。 元件40d為多重元件偵測器22的中心元件，其較佳地是 咼度及覓度皆為w，並較佳地是包含一四分偵測器具有四 個象限A，B，C及D。該象限係由一距離t來隔開，在〆較 佳具體貫施例中大約為3微米。如在本技藝中所熟知，由 這些象限所產生的信號可用於偵測散光聚焦錯誤，並用於 偵測軌道錯誤。對於CD及DVD碟片而言，反射自該碟片的 中心讀取光束可被投射到元件4〇 d的中心上。It is achieved by its alignment or design of the heavy component detector 22. Figure 4 shows a multiple two-piece m of a seven-beam system constructed in accordance with the principles of the present invention. The multi-element detection method includes a detector element technique. Each of them detects the light reflected from a corresponding disc. Each of the pieces 40 ', 4013'40 (:, 406, 4 (^ and 40§ has an elongated shape with a length of 11 and a width of ¥. The components of the adjacent multiple component detector 22 are arranged at a predetermined interval s. To each other, and staggered and offset by a predetermined distance V relative to adjacent elements. In a preferred embodiment, w is about 50 microns, h is about 120 microns, and V is about 4.2. Micrometers, and s is about 9.8 micrometers. As used herein, the staggered arrangement of detector elements is where the upper or lower edge of one element and the upper or lower edge of its adjacent element have different positions along an axis. The components are offset from each other along an axis, and if their centers are extended along the axis, they are placed differently. Therefore, the detector components 40 & 40g are all different because of their vertical perpendicularities to the upper and lower edges. The positions are staggered and shifted because their centers are placed in different vertical positions. The element 40d is the center element of the multi-element detector 22, which preferably has a w and a degree of w, and It is better to include a quarter detector with four quadrants A, B, C and D. The quadrant is defined by The distance t is separated, which is about 3 micrometers in the preferred embodiment. As is well known in the art, the signals generated by these quadrants can be used to detect astigmatic focus errors and to detect track errors. For CD and DVD discs, the reading beam reflected from the center of the disc can be projected onto the center of the component 40d.

第16頁 479247 五、發明說明（12)Page 16 479247 V. Description of the invention (12)

元件4 0 a及4 0 g為多重元件偵測器2 2的最外部元件，其較 佳地是分為兩個正段，標示為J，K，L及Μ。正段J及κ，正 段L及Μ，也可由距離t隔開。這些正段係用於產生表示DVD 碟片的執道間距變化或錯誤放大的一信號。在使用時，反 射自一DVD碟片的最外部讀取光束將被投射，使其當該系 統的放大被正確地調整且當該碟片的軌道間距為正確時， 即可相等地照亮每個正段j，K，L及Μ。當該放大太多，或 該執道間距稍微太寬時，投射到該偵測器上的影像之間的 間隔將會增加，而正段J及Μ將會比正段κ及L接收到更多的 光線。相反地，當該系統的放大過低，或該軌道間距太小 時，正段Κ及L將接收比正段j 更多的光線。藉由計算 (J + M) -（K + L)，該系統可產生一放大錯誤信號來用於一放 大修正系統’例如說明於美國專利編號5, 729, 5 1 2的系 統，其在此引用做為參考。正段j，Κ，l及Μ也可用於估計 雜音取消的參數。The components 40 a and 40 g are the outermost components of the multiple component detector 22, which are preferably divided into two positive sections, labeled J, K, L, and M. The positive sections J and κ and the positive sections L and M can also be separated by a distance t. These positive segments are used to generate a signal indicating a change in the track spacing or erroneous amplification of a DVD disc. In use, the outermost reading beam reflected from a DVD disc will be projected so that when the magnification of the system is properly adjusted and when the track pitch of the disc is correct, it will illuminate each equally. Positive sections j, K, L and M. When the magnification is too large, or the interval between the channels is slightly too wide, the interval between the images projected on the detector will increase, and the positive sections J and M will receive more than the positive sections κ and L. Much light. Conversely, when the amplification of the system is too low, or the track pitch is too small, the positive sections K and L will receive more light than the positive section j. By calculating (J + M)-(K + L), the system can generate an amplification error signal for use in an amplification correction system, such as the system described in US Patent No. 5,729, 5 1 2 which is here Citation for reference. The positive sections j, K, l, and M can also be used to estimate the noise cancellation parameters.

在圖5中，多重元件偵測器22顯示有光點X，其表示當使 用光學拾取頭10來讀取一 CD碟片時，表示反射自一CD碟片 的入射光’以及光點Y ’其表示當使用光學讀取頭1 〇另來 讀取一DVD碟片時由反射自一DVD碟片的入射光所形成。如 圖所不’每個來自兩種形式碟片而投射到多重元件偵測器 22的光點，皆對應於一個該偵測器元件。該光點X的中心 光點及光點Y的中心光點皆被入射到該中心偵測器元件的 相同區域。對於非中心偵測器元件，光點χ係入射到與光 點Υ不同的偵測器元件的區域。In FIG. 5, the multi-element detector 22 shows a light spot X, which indicates that when an optical pickup 10 is used to read a CD disc, it indicates incident light reflected from a CD disc and a light spot Y ′ It means that when an optical pickup head 10 is used to read a DVD disc, it is formed by incident light reflected from a DVD disc. As shown in the figure, each of the light spots projected from the two types of discs to the multi-element detector 22 corresponds to one of the detector elements. The center spot of the light spot X and the center spot of the light spot Y are both incident on the same area of the center detector element. For a non-center detector element, the light spot χ is the area that is incident on a detector element that is different from the light spot Υ.

第17頁 479247 五、發明說明（13) 該光束投射到該碟片表面以及該反射光束被投射到該多 重元件偵測器22的角度，會隨著碟片形式而改變。該變化 係由繞射元件13及14造成，其可被導引到不同的角度來產 生光束線，其間隔及方向可以對準一光碟片的多重執道， 並被投射到多重元件偵測器22的元件上。兩組光束投射到 夕重元件偵測2 2的角度也與多重元件偵測器2 2的方向有 關。 對於一CD碟片，該軌道間距大約是一DVD碟片的執道間 距的兩倍，而光束之間的間隔則大致與dvd碟片相同，所 以光束被投射到多重元件偵測器22的角度必須大於反射自 DVD碟片的光束被投射到多重元件偵測器22的角度。此 角度的調整可允許光束的間隔對於兩種形式的碟片有所不 ，，而允許投射到多重元件偵測器22的表面上的光束能夠 在水平方向上具有相等的間隔，而僅在垂直方向具有不同 的間隔。 元件40a，40b，40c，40e，40f及4〇g係在垂直方向上加 :(如南度h大於寬度w) ’且具有交錯及偏移的配置，而允 ^f 一廣大的垂直區域上偵測投射到多重元件偵測器Μ =光線。此種在一廣大垂直區域上偵測光線的能力，結合 了可對兩種不同形式的光學媒俨 ^ t 70干琛體以不同角度投射光點的能 右P提#一種能力可以使用單組的偵測器來偵測反射自 間隔的兩種光學媒體形式的多重讀取光束。 ―二參考圖6，其說明本發明的多重元件偵測器的另 八體貫施例。多重元件偵測器50可以用於光學拾取頭Page 17 479247 V. Description of the invention (13) The angle at which the light beam is projected onto the disc surface and the reflected beam is projected onto the multi-element detector 22 will vary with the disc format. The change is caused by the diffractive elements 13 and 14, which can be guided to different angles to generate a beam line, the interval and direction of which can be aligned with the multiple channels of a disc, and projected to the multiple element detector 22 of the components. The angle at which the two sets of light beams are projected to the U-component detection unit 2 2 is also related to the direction of the multi-element detection unit 2 2. For a CD disc, the track pitch is approximately twice the track pitch of a DVD disc, and the interval between the beams is approximately the same as that of a DVD disc, so the beam is projected onto the angle of the multi-element detector 22 It must be larger than the angle at which the light beam reflected from the DVD disc is projected onto the multi-element detector 22. The adjustment of this angle allows the beam interval to be different for the two types of discs, and allows the beams projected on the surface of the multi-element detector 22 to have equal intervals in the horizontal direction, and only in the vertical direction. The directions have different intervals. The elements 40a, 40b, 40c, 40e, 40f, and 40g are added in the vertical direction: (eg, the south degree h is greater than the width w) 'and have a staggered and offset configuration, and allow a large vertical area Detect the multi-element detector M = light. This ability to detect light over a large vertical area combines the ability to project light spots at different angles on two different types of optical media. The ability to use a single group can be used. Detector to detect multiple read beams reflected from two optical media in a spaced-apart manner. -Referring to Fig. 6, it illustrates another eight-body embodiment of the multiple component detector of the present invention. Multiple component detector 50 can be used in optical pickup heads

第18頁 479247 五、發明說明（14) 10，來取代多重元件偵測器22，其包含偵測器元件52 52g。偵測器元件52&_52。及526_522具有—加長的來狀 如前所述，中央偵測器元件52(1具有一方形形狀，並二 成四個正段，其可用來偵測聚焦及軌道錯誤。 刀 測器元件52a及52g係被分成兩個正段，且、<、 镇測DVD光束中的放大錯誤（光點γ)。八了用於如則述般 偵測器元件52c及52e係以相對於中心偵測器元件52 相反方向來垂直地交錯及偏移，而偵測器52&及52b 、 於偵測器52c，而偵測器元件52f及52g則對準於 一 件52e。如前所述，該偵測器元件可在水平方向上彼二 相同的距離隔開。 由此可以看出，對於當該系統讀取一^碟片時代表投影 光點的光點X，以及當系統讀取一 DVD碟片時代 的光點Y，其皆射入到多重元件偵測器5〇的偵測器上對 於非中心偵測器元件’光點X係與光點γ射入到不°同的偵測 兀件的區域’而在該中心偵測器元件上，光點則射入到 相同的區域。由於光點的角度，加長的形狀，多重元件债 測器5 0的該偵測器元件的交錯及偏移配置，可同時由一 CD 碟片或DVD碟片來讀取多重的軌道。 ’ 圖7所示為根據本發明原理所建構的一多重元件偵測器 的又另一個具體實施例。多重元件偵測器6〇包含偵測器元 件62a-62g。中心偵測器元件62d包含四個正段來形成一四 象限偵測器，用來偵測軌道及聚焦錯誤，而最外部的偵測 器元件62a及62g皆包含兩個正段，其可用於债測在_光Page 18 479247 V. Description of the invention (14) 10, instead of the multi-element detector 22, which contains the detector elements 52 52g. Detector element 52 & _52. And 526_522 have—the lengthened shape is as described above, the central detector element 52 (1 has a square shape and is divided into four positive segments, which can be used to detect focus and orbit errors. Knife detector element 52a and The 52g system is divided into two positive segments, and <, suppresses the magnification error (light spot γ) in the DVD beam. The detector elements 52c and 52e are used to detect relative to the center as described above. The detector elements 52 are staggered and shifted vertically in opposite directions, while the detectors 52 & and 52b are on the detector 52c, and the detector elements 52f and 52g are aligned on a piece 52e. As previously mentioned, the The detector elements can be spaced at the same distance from each other in the horizontal direction. It can be seen that for the light spot X, which represents the projected light spot, when the system reads a disc, and when the system reads a DVD, In the disc era, the light spots Y are all incident on the detector of the multi-element detector 50. For the non-center detector components, the light spot X and the light spot γ are incident to different detections. The area of the element, and on the center detector element, the light spot enters the same area. Due to the angle of the light spot, it is longer The shape and the staggered and offset configuration of the detector element of the multi-element debt detector 50 can read multiple tracks simultaneously from a CD or DVD disc. 'Fig. 7 shows an embodiment according to the present invention. Yet another embodiment of a multiple element detector constructed by the principle. The multiple element detector 60 includes detector elements 62a-62g. The central detector element 62d includes four positive segments to form a four. The quadrant detector is used to detect track and focus errors, while the outermost detector elements 62a and 62g each contain two positive sections, which can be used for debt measurement

479247 五、發明說明（15) 束中的放大錯誤。 4貞測器元件6 2 a - 6 2 c及6 2 e - 6 2 g具有加長的形狀，其偵測 器元件的南度隨著該债測器元件與中心偵測器元件6 2 d之 距離而改變。因此，偵測器元件62a —62g具有一交錯的配 置，而每個偵測器元件即相對於一相鄰元件以一預定距離 來交錯。 -H兀件偵測器60覆蓋了 一垂直區域’其與中心偵測器 二的f離變得較大，而使得當與該中心光點的距離 的S ‘之ί古T可符合於所增加的來自兩種不同媒體形式 片離。由此可以看出，當該系統讀取-⑶碟 的光點γ' i皆:二：當系統讀取-_碟片時所投射 盥光點Y射入5,丁 m十非中读測器元件，光點X係 測；.二射上入，:不^ ^ ^ 九點則射入到相同的區域。 於：技具體實施例已在上述加以說明，對 正，而不背ΐίϋΐϋ瞭解到可以進行不同的改變及修 元件偵測器可以；整來$圍。舉例而t ’本發明的該多重 其它偵測器元二==較^較少的光束，也可使用 有這些位在本的ί:斤：：請專利範圍中，是要包含所 的真λ精神及範圍内的改變及修正。 479247 圖式簡單說明 « 第21頁479247 V. Description of the invention (15) The magnification error in the beam. 4 The sensor element 6 2 a-6 2 c and 6 2 e-6 2 g have an elongated shape, and the south of the detector element follows the debt detector element and the center detector element 6 2 d. The distance changes. Therefore, the detector elements 62a-62g have a staggered configuration, and each detector element is staggered at a predetermined distance relative to an adjacent element. -H element detector 60 covers a vertical area 'its distance from the center detector two becomes larger, so that when the distance S from the center light spot, the ancient T can meet The increase comes from two different media formats. It can be seen that when the system reads-the light spot γ 'i of the CD: both: when the system reads the-disk, the projected light spot Y hits 5, and the reading is measured. Device, the light point X is measured; .2 shots on, and: ^ ^ ^ 9 points are shot into the same area. Yu: The specific embodiments of the technology have been described above. Correction, without understanding, you can make different changes and repair the component detector; For example, t 'the multiple other detector elements of the present invention == less than ^, can also be used with these bits in the following: In the scope of the patent, please include the true λ Changes and amendments within the spirit and scope. 479247 Schematic description «Page 21

Claims (1)

479247 六、申請專利範圍 1 · 一種多重元 二光學碟片之一 片具有不同的執 含： 複數個偵測器 相鄰的複數個偵 數個偵測器元件 件皆在垂直於該 件而以一預定的 2 ·如申請專利 數個偵測器元件 3 ·如申請專利 對於複數個偵測 器元件皆在垂直 元件偏移'一預 4 ·如申請專利 個該複數個加長 比預定的寬度要 5 ·如申請專利 數個偵測器元件 器元件。 6 ·如申請專利 心偵測器元件包 限偵測器。 件偵測器，其用於同時讀取來自第一及第 的複數個資料軌道，該第一及第二光學碟 道間距及資料密度，該多重元件谓測器包 7L 1干，具母 _ ” ^7 ^—平田牙、J 測器元件彼此等距離地隔開，至少對於複 c組合’其每個該複數個偵測器元 第軸的方向上，相對於一相鄰 距離進行交錯。 州1貝劂m 70 J圍第1項之多重元件偵測器，其中該複 匕含複數個加長的偵測器元件。 !圍第2項之多重元件偵測器，其中至少 裔元件的一次纟且人，^ ^ / 於呼後 ^ Μ + ^其母個該複數個偵測 於該第一轴的方向上，如 定的距離。 相對於一相鄰横測 範圍第2項之多重亓杜技、t ΛΑ ^ 更兀件偵測器，JL中每一 大。 白具有一預定的高度，而其 範圍第2項之多重元件福 包含一具有高度相等、^，其中該複 相4於其寬度的中心偵測 含四個_二偵:置器來形其成彳 (»479247 6. Scope of patent application1. One of a kind of multi-element two optical discs has different licenses: Multiple detectors are adjacent to each other and a number of detector components are perpendicular to the one and one Predetermined 2 · If a patent is applied for a plurality of detector elements 3 · If a patent is applied for a plurality of detector elements are offset in the vertical element 'a pre-4] · If a patent is applied, the plurality of lengths are longer than the predetermined width by 5 · Several detector elements such as patent applications. 6 · If applying for a patent, the heart detector component is limited to the detector. Component detector, which is used to simultaneously read a plurality of data tracks from the first and the second, the first and second optical track distances and the data density, the multi-component tester package 7L 1 is dry, with a mother_ ^ 7 ^ —Hirata Ya and J detector elements are equally spaced from each other, at least for the complex c-combination 'each of the plurality of detector elements is interleaved with respect to an adjacent distance. State 1 Beam m 70 J. The multiple component detector of item 1, wherein the complex dagger contains a plurality of lengthened detector components.! The multiple component detector of item 2 includes at least one纟 和 人, ^ ^ / 呼 后 呼 Μ + ^ Its mother is detected in the direction of the first axis, such as a predetermined distance. Multiple relative to the second term of an adjacent transverse range Du Ji, t ΛΑ ^ more element detectors, each of JL. White has a predetermined height, and the multiple element fu of its range item 2 includes an element with equal height, ^, where the complex phase is 4 to The center detection of its width contains four _ two detection: setter to form it (» 一 ΙΖϋ1 IZ 479247 六、申請專利範圍 7. 如申請專利範圍第6項之多重 該中心，元件的該四個偵测器區段的作V係用V來上 一聚焦錯誤信號。 L就係用於產生 8. 如申請專利範圍第6項之多 It t - ^ ,,J H ^ # ^ , ^ ,(J ^ ^ ^ 一執道錯誤信號。 ^號係用於產生 9. :申請專利範圍第！項之多重元件 一上第二最外測器元件具有兩個偵測器區段。 10·如申鮰專利範圍第9項之多重元件偵測器，其中由該 第-最外部偵測器元件的該兩個偵測器區段所產生的信 號，及由該第二最外部谓測器元件的該兩個偵測器區段所 產生的佗號’皆用於計算一放大錯誤信號。 11 ·如申凊專利範圍第1項之多重元件偵測器，其中該第 一光碟片為一CD格式光碟片，而該第二光碟片為一 DVJ)格 式的光碟片。 12· —種同時由具有不同格式的第一及第二光碟片之一 讀取複數個資料執道的方法，該方法包含： 提供一中心偵測器元件及複數個非中心偵測器元件； 產生複數個讀取光束，其包含複數個非中心讀取光束； 將該複數個非中心讀取光束聚焦到該第一或第二光碟片 之一的表面上，藉以產生複數個非中心反射光束，每個非 中心讀取光束被聚焦到對應的複數資料軌道中的一個，藉 以產生對應的該複數個非中心反射光束中的一個；及479247 6. Scope of patent application 7. If the scope of patent application item 6 is multiple, the center, the four detector sections of the element are used as V to use V to the previous focus error signal. L is used to generate 8. It t-^ ,, JH ^ # ^, ^, (J ^ ^ ^ is an error signal if it is as many as the 6th in the scope of patent application. ^ Is used to generate 9 .: The second outermost detector element on the multi-element one of the scope of the patent application has two detector sections. 10. The multi-element detector of the ninth scope of the patent application, where the -most The signals generated by the two detector sections of the external detector element and the 佗 'generated by the two detector sections of the second outermost detector element are used to calculate a Amplify the error signal. 11. The multiple component detector of item 1 in the patent application, wherein the first optical disc is a CD-format disc and the second optical disc is a DVJ-format disc. 12. · A method for simultaneously reading a plurality of data from one of the first and second optical discs having different formats, the method comprising: providing a center detector element and a plurality of non-center detector elements; Generating a plurality of reading beams including a plurality of non-center reading beams; focusing the plurality of non-center reading beams onto a surface of one of the first or second optical discs, thereby generating a plurality of non-center reflecting beams , Each non-center reading beam is focused to one of the corresponding plurality of data tracks, thereby generating a corresponding one of the plurality of non-center reflection beams; and 第23頁 479247 六、申請專利範圍 如果讀取該第一光碟片時’將每個非中心反射光束投射 到每個非中心偵測器元件中的一第一區域上，而如果讀取 該第一光碟片時’則將每個中心反射光束投射到每個非中 心偵測器元件中的一第二區域上，每個非中心偵測器元件 的該第一區域係與該非中心偵測器元件的該第二區域相隔 開。 1 3 ·如申請專利範圍第1 2項之方法，其中提供一中心偵 測器元件，係包含了提供一具有四個偵測器區段的一中心 債測器元件，其係配置來形成一四象限偵測器，每個該四 象限偵測器區段即產生一信號來表示射入在該偵測器區段 上的光線量，而其中該方法進一步包含： 加入政光性到該複數個讀取光束中的至少一中心讀取光 束； 投射對應於該中心讀取光束的一反射光束到該中心偵測 器元件上；及 產生對應於由該四象限偵測器區段所產生的信號之一聚 焦錯誤信號。 1 4·如申請專利範圍第丨3項之方法，進一步包含產生對 應於由該四象限偵測器區段所產生信號的一軌道信號。 15·如申請_專利範圍第12項之方法，其中提供複數個非 中心，/則器元件包含有提供第一及第二最外部偵測器元 件，母一個該第一及第二最外部偵測器元件具有兩個偵測 器區段。 1 6 ·如申4專利範圍第丨5項之方法，進一步包含產生對Page 23 479247 VI. Patent application scope If the first optical disc is read, each non-center reflected beam is projected onto a first area in each non-center detector element, and if the first In the case of an optical disc, each central reflection beam is projected onto a second area in each non-center detector element, and the first area of each non-center detector element and the non-center detector This second region of the element is separated. 1 3 · The method according to item 12 of the patent application scope, wherein providing a central detector element includes providing a central debt detector element with four detector sections, which are configured to form a A four-quadrant detector. Each of the four-quadrant detector sections generates a signal to indicate the amount of light incident on the detector section, and the method further includes: adding political light to the plurality of At least one central reading beam of the reading beams; projecting a reflected beam corresponding to the central reading beam onto the central detector element; and generating a signal corresponding to the four-quadrant detector section One of the focus error signals. 14. The method of claim 3, further comprising generating a track signal corresponding to a signal generated by the four-quadrant detector section. 15 · If the method of item 12 of the scope of the patent is applied, in which a plurality of non-centers are provided, the device element includes providing first and second outermost detector elements, and one of the first and second outermost detectors is provided. The detector element has two detector sections. 1 6 · The method of item 5 in the patent scope of claim 4, further comprising generating a pair 第24頁 479247Page 479 247 六、申請專利範圍 應於^該第一最外部偵測器元件的該兩個偵測器區段 段所產生的信號之一放大錯誤。？件的該兩個谓測器區 17.如申請專利範圍第12項之方法，其中產生 取光束包含選擇性地產生複數個讀取光束，其且第 長而適合於讀取該第一光碟片，或是 隹八、*旦' 合於讀取該第二光碟片。 t疋具有-第二波長而適 18.如申請專利範圍第17項之方法，進一步包含提供一 全像攝影光學元件，其可允許產生繞射有線光點在該'第一6. Scope of patent application The error should be amplified in one of the signals generated by the two detector sections of the first outermost detector element. ? 17. The method of item 12 of the patent application scope, wherein generating a light beam includes selectively generating a plurality of reading beams, which is long and suitable for reading the first optical disc. , Or 隹 八, * 丹 'are suitable for reading the second optical disc. t 疋 has a second wavelength. 18. The method according to item 17 of the patent application scope, further comprising providing a holographic photographic optical element, which may allow the generation of diffracted wired light spots at the 'first 光碟片的表面上，而其光線具有該第一波長，亦可允許產 生繞射有線光點在該第二光碟片的表面上，而其光線具有 該第二波長。 1 9.如申明專利範圍第1 8項之方法，其中提供一全像攝 影元件，進一步包含提供一具有一内部及一外部的全像攝 影元件，該外部限制了該物件對於具有第一波長光線的數 值光圈。 20· —種光學拾取頭，其同時地讀取來自第一或第二光 碟片的複數個資料軌道，該第一及第二光碟片具有不同的 格式，該光學拾取頭包含： 一第一光源，其可選擇性地產生一具有第一波長的一第 一照明光束； 一第一繞射元件，其將該第一照明光束分離到一第一複 數個讀取光束，該第一複數個讀取光束包含一第一間隔， 並對準於一第一角度；On the surface of the optical disc, and its light has the first wavelength, it is also allowed to generate a diffracted wired light spot on the surface of the second optical disc, and its light has the second wavelength. 19. The method as claimed in item 18 of the patent scope, which provides a holographic photographic element, further comprising providing a holographic photographic element having an interior and an exterior, the exterior restricting the object to light having a first wavelength Numerical aperture. 20 · An optical pickup head that simultaneously reads a plurality of data tracks from a first or a second optical disc, the first and second optical discs having different formats, the optical pickup includes: a first light source Which can selectively generate a first illumination beam having a first wavelength; a first diffractive element which separates the first illumination beam into a first plurality of reading beams, the first plurality of reading beams The beam taking includes a first interval and is aligned at a first angle; 第25頁- 479247 六、申請專利範圍 第二複 間隔， 到 一第二光源，其可選擇性地產生一具有第二波長、一 二照明光束； 一第二繞射元件，其將該第二照明光束分離 數個讀取光束，該第二複數個讀取光束包含一第 並對準於一第二角度； 一光束分離器，其重新導向該第二複數個讀取光束，以 使該第一複數個讀取光束及該第二複數個讀取光束分享一 在該光束分離器之後的共用光學路徑； 一全像攝影光學元件，其可允許一物件將該第一複數個 讀取光束聚焦到該第一光碟片的多重軌道上，藉以產生一 第一複數個繞射限制光點，並將該第二複數個讀取光束聚 焦到該第二光碟片的多重軌道上，藉以產生一第二複數個 繞射限制光點；及 複數個加長的偵測器元件，其每個加長的偵測器元件包 含一第一區域，用於接收反射自該第一光碟片的該第一複 數個繞射限制光點中對應的一個之影像，及一第二區域， 其與第一區域隔開，用於接收反射自該第二光碟片的該第 二複數個繞射限制光點中對應的一個之影像。” 21·如申請專利範圍第20項之光學拾取頭，°盆 元件包含一内部及外部’該外部導引具中有第上 束之物件的數值光圈。 阳制為第—複數個讀取光 22·如申請·專利範圍第20項之光學扒 -中心摘測器元件，其具有四象限予::二，進-步包含 貝列恭區段配置來形成 ^申清專利範圍 四象限偵測器 2 3 ·如申請專利範圍第2 2項之光學拾取頭，進一步包含 —全像攝影元件，其加入散光性到投影至該中心偵測器元 件的一讀取光束。 、24·如申請專利範圍第23項之光學拾取頭，其中由該中 心債測器元件的該四象限偵測器區段所產生的信號，係用 於產生一聚焦錯誤信號。 25·如申請專利範圍第22項之光學拾取頭，其中由該四 象限偵測器區段所產生的信號係用來產生一軌道信號。 26·如申請專利範圍第2〇項之光學拾取頭，其中該複數 個加長的偵測器元件的每個第一及第二最外部偵測器元件 皆具有兩個偵測器區段。 27·如申請專利範圍第26項之光學拾取頭，其中由該第 一最外部偵測器元件的該兩個偵測器區段產生的信號，及 由該第二最外部谓測器元件的該兩個偵測器區段產生的信 號，皆用於產生一放大錯誤信號。Page 25-479247 6. The second complex interval of the patent application, to a second light source, it can selectively generate a light beam with a second wavelength, one or two illumination; a second diffractive element, which The illumination beam separates a plurality of reading beams, and the second plurality of reading beams includes a first and aligned at a second angle; a beam splitter that redirects the second plurality of reading beams so that the first The plurality of reading beams and the second plurality of reading beams share a common optical path behind the beam splitter; a holographic photographic optical element that allows an object to focus the first plurality of reading beams To the multiple tracks of the first optical disc, thereby generating a first plurality of diffraction-limited light spots, and focusing the second plurality of reading beams onto the multiple tracks of the second optical disc, thereby generating a first Two or more diffraction-restricted light spots; and a plurality of lengthened detector elements, each of which includes a first area for receiving the first plurality of reflections from the first optical disc An image of a corresponding one of the diffraction-restricted light spots, and a second area separated from the first area, for receiving a corresponding one of the second plurality of diffraction-restricted light spots reflected from the second optical disc Image. "21 · If the optical pickup head of the scope of application for the patent No. 20, the pot element includes an internal and external 'numerical aperture of the object on the first beam in the external guide. The male system is the first-a plurality of reading light 22 · If the application · Patent scope item 20 of the optical pick-up center picker element, which has four quadrants: 2: Second, the step-by-step configuration includes the Belle Gong section configuration to form the patent application four quadrant detection The optical pickup head according to item 22 of the patent application scope further includes a holographic photographic element, which adds astigmatism to a reading beam projected onto the central detector element. 24. Such as applying for a patent The optical pickup head of the scope item 23, wherein the signal generated by the four-quadrant detector section of the central debt detector element is used to generate a focus error signal. Optical pickup head, in which the signal generated by the four-quadrant detector section is used to generate a track signal. 26. The optical pickup head of claim 20 in the patent application range, wherein the plurality of lengthened detectors Components of each The first and second outermost detector elements each have two detector sections. 27. For example, the optical pickup head of the 26th scope of the patent application, wherein the two of the first outermost detector elements The signal generated by the detector section and the signals generated by the two detector sections of the second outermost detector element are used to generate an amplified error signal.
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