A7 B7 五、發明説明（1 ) 發明背醫 大致地，本發明有關定位一光束，且較特別地有黼碟 Η驅動器之旋轉式致動器之循跡動作。 光學之大量儲存提供一用Μ運送大量資料之便利機構 (亦即，光碟）。於一典型之唯謓光碟（例如，CD-ROM碟 片）上，資料係由形成於該碟片之一表面中之凹陷或坑 洞之存在與否來表示。當光碟驅動器從藏片讀取資料時 ，一轉軸以一預定之速率旋轉該碟Η且一精確聚焦之光 束（例如，雷射光束）被指引至碟片之表面Μ便從碟片掃 描資料，該表面從碟Η反射光束，且形成於碟片之表面 中之坑洞調變著自碟片所反射之光束之強度，儲存於碟 Η上之資料刖藉監看所反射之光束之強度（高或低）及藉 形成由諸1與諸0所組成之相對應資料而被重建為一數 位式表示。諸如光磁碟或相位改變碟之一些光碟，可分 別地由光磁碟片驅動器及相位改變碟片驅動器予Μ讀取 及寫入。除了自碟片讀取及寫入資料之外，該光束可使 用於產生使光束集中於碟Η之一所要資料軌跡上之信號。 經濟部中失標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 光學驅動器可利用一旋轉式致動器來定位光學驅動頭 ，該光學驅動頭可具有一使用於指引光束至碟片表面之 物鏡及可指引反射自碟片之光束。典型地，該光束係由 一安裝於驅動器之底板之光學模組所產生，而一電流計 之反射式表面則被使用來建立光束之連絡於光學模組與 光學驅動頭之間。 本發明之目的在於提供光學横組在旋轉式致動器上之 -3- 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） 經濟部中央標準局員-工消费合作社印製 A7 , B7 五、發明説明（2 ) 安裝，藉此減少電流計之動作，本發明之另一目的在於 提供一固定之空間關係於物鏡，電流計與固定光學姐之 間。 本發明之另外目的及優點將描述於下文之說明中，且 部分將從說明中圼明顯，或可藉實行本發明而習得。本 發明之目的及優點可藉由申請專利範圍中所特別指出之 手段及組合予Μ完成及獲致。 發明細；沭 大致地，於一観點中，本發明係Μ —種使用於光磲之 裝置為特徵。該装置具有一可旋軸之臂，係配置Μ定位 一光學驅動頭於碟片之一所選取部位之上方。一光源係 安裝在於該臂且配置以產生光束。該碟片驅動器之一反 射器係配置於接收該光束且指引該光束至光學鼷動頭之 一所選取之部位。 本發明之實_可含有下述之一種或多種。反射器可為 一具有固定位置之鏡面；反射器可為一微電流計之鏡面 總成，而光源可含有一光學模組；反射器可含有一部分 反射及部分透光之表面，該表面定位於朝著光學驅動頭 反射光束。同時，該裝置可含有一檢測器（例如，一雙 單元檢測器），係定位Μ截取來自穿透表面之光束之光 線，及根據穿透表面之光線提供光束在表面上之位置之 指示。該裝置可含有一控制器（例如，一循跡伺服迴路 及一電流計），係連接Μ接收該指示及定位該平面。該 裝置可含有一光學模組，係配置以產生光束；及一電流 -4- 本紙張尺度適用中國國家榇準（CNS ) Α4規格（210Χ297公釐） (請先閲讀背面之注意事項再填寫本頁) 訂 A7 B7 五、發明説明（3 ) 計，具有一反射式表面Μ便指引由固定式光學組所提供 之光束至該反射器。 電流計之一軸可與可旋轉臂所旋軸有翮之一軸同心； 然而，電流計之該軸可與除了該可旋軸臂所旋軸有關之 該軸之外之軸對準。該光學驅動頭可固定於臂之一端， 且該電流計可安裝於臂之表面上而沿直徑地相反於該臂 之一端。由光源產生之光束可於實際平行於碟片表面之 一平面中，導引自反射器至光學頭之光束可於實際垂直 於碟片表面之一平面中。同時，該裝置可含有一成像透 鏡，位於光源與反射器。 大致地，於另一観點中，本發明係Μ—種使用於光碟 驅動器之方法為特徵。該光碟驅動器具有一可旋軸之臂 連接Μ定位一光學驅動頭於一碟Η之所選取部位之上方 。該方法包含：產生一光束自一安裝於該臂之光源；Κ 及導引該光學頭之一所選取之部位。 經濟部中央標準局員土消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 本發明之實施可含有下述之一種或多種。該導引法可 含有利用一反射器；該導引法可含有利用一電流計，配 置Κ定位一反射器來導引光束，該光束可於一實質地平 行於碟片之一表面之平面中；Μ及該導引法可含有利用 一固定於該臂且被安裝來導引該光束朝向光學頭之電流 計。 大致地，於另一觀點中，本發明係Μ—種使用於光碟 之裝置為特徵。該裝置具有一臂，實質地平行於碟片之 一表面且被連接Μ旋軸於有關於位在該臂一端之一軸， -5 - 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X 297公釐） 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（4 ) 該臂係配置Μ定位一位在該碟片之一所選取部位上方靠 近該臂之另端之光學驅動頭。該裝置具有一光源，安装 於靠近該臂之一端而配置Κ產生一光束於一實質平行於 該碟片之一表面之平面中。同時，該裝置具有一成像透 鏡及一電流計及一電流計，安裝於靠近該臂之一端而配 置以定位一第一鏡面來反射由光源透過成像透鏡及朝向 該臂之另端所產生之光束。該裝置具有一第二鏡面，安 裝於靠近該臂之另端而配置Μ反射由第一鏡面所反射之 光束於一實質垂直於該碟片之表面之平面中且朝向該光 學頭。 大致地，於另一観點中，本發明係Κ 一種使用於光碟 之裝置為特徵。該裝置具有一臂，實質地平行於碟片之 一表面且被連接Μ旋軸於有關於位在該臂一端之一軸， 該臂係配置Μ定位一位在該碟片之一所選取部位上方靠 近該臂另端之光學驅動頭。該裝置具有一光源，安装於 靠近該臂之一端而配置Μ產生一光束於一實質平行於該 碟片之一表面之平面中。同時，該装置具有一電流計， 安裝於靠近該臂之另端而配置以定位一鏡面來反射光束 於一實質垂直於該碟片之表面之平面中且朝向該光學驅 動頭。 大致地，於另一観點中，本發明係Μ —種使用於光碟 驅動器之方法為特激。該光碟驅動器具有一可旋軸之臂 連接Μ定位一光學驅動頭於一碟片之所選取部位之上方 。該方法包含：經由一光源產生一光束；Μ及旋轉該光 -6 - 本紙張尺度適用中國國家標準（CNS ) Α4规格（210'〆297公釐） (請先閎讀背面之注意事項再填寫本頁) 、1Τ \)rl A7 B7 五、發明説明（5 ) 源Μ循跡該臂之動作。 画忒簡屋說明 结合於本說明書中及建構一部分本發明之附圖，與上 文之大致說明及下文之詳细說明，用來解說本發明之原 理，其中； 第1圖係一碟Η驅動器致動器之頂視圖； 第2圖係第1圖碟片驅動器致動器之側視圖； 第3圖係一選擇性實施例之碟片驅動器致動器之頂視 圖；Κ及 第4圖係一選擇性實施例之碟Μ驅動器致動器之示意 圖。 龄住實_例說明 經濟部中央標準局員·工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 如第1及2圖中所示，於一光碟鼷動器中，一光學模 組100經由一光束（例如，雷射光）與一光學驅動頭107連 絡以自一光碟1.1 2之上表面211讀取資料。該光學模組100 係安裝於一旋轉式致動器103之上；該致動器103具有一 臂於一實質平行於表面211之平面中，用Κ旋軸於有闞一 垂直軸200及定位一光學驅動頭107於該平面211之一所 選取之地區上方。因為光學模組100係安裝於致動器103 之上且旋轉於臂110,—預定之空間關係被維持於光學模 組100與驅動頭107之間而無視該臂110之位置。 為了從碟片112謓取資料，由模組100所產生之光束沿 著三條光學路徑106,108及109行進至光學驅動頭107,該 驅動頭107係由碟片112之上表面上方之壁110所定位。 -7- 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） 經濟部中央標準局員.工消費合作社印製 A 7 B7 五、發明説明（6 ) 光學路徑106及108係於一實質平行於表面211之平面中， 光學路徑109係於一實質垂直於表面211之平面中。光學 驅動頭107傳輸起始自模組100之光束至反射該光束之表 面211,光學驅動頭107導引反射自該表面211之光束回到 光束路徑109,所反射之光束隨著光學路徑109,108及106 至模組100,而自表面211謓取之資料係抽取於該處。 為了精细地定位由光學模組100所產生之光束於驅動 頭107之上（M及在表面211上之一選取軌跡之上），一可 移動之電流計10 4鏡面102被定位以連结光學路徑106及 108。對於鏡面102之各位置，當該壁110旋轉時，一預 定之空間關係存在於光學模組100及鏡面102之間。因此 ,藉轉動該鏡面102,電流計104提供光束連絡之精细循 跡於光學模組100與表面211之間。另一方面，光學模組 100與表面211間之光束連絡之粗略循跡則由該臂110之 旋軸動作所提供。 光學模組100係安裝於旋轉式致動器103之圓柱狀輪軸 136之頂部，輪軸136係與軸200同軸，而輪軸136之底部 則安裝於固定在一驅動器基板135之圓柱狀安裝管134。 致動器臂110横向地延伸自輪軸136之側邊之懸衔該頭107 於表面211之上方。電流計10 4安裝於旋轉式致動器103 之上，使得電流計10 4M相同於旋轉式致動器103之角度 旋轉。電流計鏡面102之反射性表面可位於靠近電流計 104之旋軸處，且可安裝於其他處，如下所述。 為了控制該臂110之動作，旋轉式致動器103包含一線 -8 - 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閎讀背面之注意事項再填寫本頁) 訂 經濟部中央標準局員土消費合作社印製 A7 B7 五、發明説明（7 ) 圈103位於輪軸136之側邊上而沿直徑地相反於致動器臂 110。該線圈130電磁地與一磁鐵132(安裝於驅動器基板 135之上）互相影響Μ控制旋轉式致動器103在軸200周圔 之旋軸。致動器臂110含有一彈性撓曲器202其向下地延. 伸自致動器臂110 Κ定位光學驅動器頭107靠近表面211。 如第2圖中所示，光學路徑108沿著臂110雔開輪軸136 ，沿著路徑108存在著一成像透鏡11 5垂直於路徑108,且靠 近雛開輪軸136之致動臂110之末端，一固定式反射鏡面 114連结光學路徑108及109。 為了定位光學路徑1〇9(亦即，建立光束之連繫於表面 211之一所選取之部分），一雙單元之檢測器166被安裝 於鏡面114之背部，鏡面114係部分地透光且允許來自藉 光學模組100產生之光束之亮度由檢測器166檢出。一電 流計伺服反饋迴路（未圖示）利用檢測器166所提供之資 訊來控制電流計鏡面102之位置，其指向光學路徑109之 行進路線。 同時，旋轉式致動器103含有另一致動器臂111,位於 臂110之下方且實質地與該臂110平行，此致動器臂111 具有相同於上述之元件以用於與光碟片112之下方表面 210互相作用Μ讀取該碟片之底部面。另一光學模組100 可安裝於輪軸136之底部，或選擇性地，一鏡面或稜鏡 可Μ Μ允許光線連繫於光學模組1 0 0及致動器臂1 11之光 學致動頭之間之方式來安装。 為產生光束，光學模組100含有：一雷射模組150其沿 本紙張尺度適用中國國家標準（CNS ) Α4規格（210 X 297公釐） (請先閲讀背面之注意事項再填寫本頁) 訂 A7 B7 五、發明説明（8 ) 著光學路徑106透過一準直透鏡152投射出光束；一偏極 化/光束分光器154; Μ及一準直/修正透鏡156。反射 自表面211之光束經由鏡面102沿著光學路徑106透過透 鏡156且由分光器154轉移至光學模組100之何服及資料 檢測器160。資料檢測器160則抽取來自碟Η 112所反射 光束之資料。 _ 於本發明領域中之其他實施例，例如，如第3圖；中所 示，電流計104可選擇性地Μ —沿直徑相反於致動器臂 110之位置安裝於輪軸之頂部上而非於旋轉式致動器103 之旋轉中心處。於此實施例中，鏡面102之旅轉袖仍平 行於軸200,而鏡面102延伸於該輪軸136之頂部表面上 方。於此實施例中，光學模組100經由光學路徑108,109 及300與驅動頭107連络。光學路徑300取代光學路徑106 ，而鏡面連结光學路徑106到光學路徑108,自碟片112 反射之光束臃著光學路徑1 0 8-109及300。 經濟部中央標準局員主消費合作社印製 (請先閎讀背面之注意事項再填寫本頁) 於另一實施例中，如第4圖中所示，一微電流計鏡面 總成400(例如，由德卅儀器公司所製作之數位式微鏡面 裝置（DVD)微晶Η鏡面）取代該固定式之反射鏡面114。 於此實施例中，電流計104與其鏡面102被去除。再者， 光學模組100係沿直徑相反於臂U0而安裝於輪軸136之 上，光學模組100經由光學路徑109及一光學路徑401建 立與驅動頭107之光東連絡。光學路徑401係於一實質平 行於表面211之平面中而沿著臂110延伸自光學模組100 至微電流計鏡面缌成400。該總成400之一部分地反射性 -10- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） A7 ____B7 五、發明説明（9 ) 表面405連結路徑401與109且提供光學路徑109於驅動頭 107上之定位。因為表面405係部分地透光，一安裝於表 40路腋 面迴伺 之示 面圖 背未 元 單 雙 該 與 路 迴 導成 而總 位 定 地 確 精 Μ 上 之 6sfe;響學 ο 地 40r«影光 饋面 反表 供性 提射 藉反 面 表 變 轉 眼 ί 軸 跡 盾 跡 f 正 S該3 循 於 徑 路 於之 裝頭 安動 一 驅 自學 束光 光一 一 至 生束 產光 Μ 該 用引 導 1 及 了源 明光 說之 已器 ，動 述致 所式 上轉 綜旋 並 明 發 本 而 然 明 說 Μ 予 〇 例 法施 方實 及佳 置較 裝一 之就 位已 部明 取發 選本 所 轉 ϋΒ 範 之 明 發 本 是 而 . 0 .例定 施界 實所 該圍 之範 述利 所專 及請 繪申 所之 於錄 限附 受由 未係 (請先閎讀背面之注意事項再填寫本頁) 經濟部中央標準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（210X 297公釐）A7 B7 V. Description of the invention (1) The invention of back medicine Generally speaking, the present invention relates to the tracking action of positioning a light beam, and more particularly a rotary actuator of a disk drive. Optical mass storage provides a convenient mechanism (i.e., optical disc) to transport large amounts of data by M. On a typical CD-ROM (for example, a CD-ROM disc), the data is represented by the presence or absence of depressions or pits formed in one surface of the disc. When the optical disc drive reads data from the disc, a rotating shaft rotates the disc at a predetermined rate and a precisely focused light beam (for example, a laser beam) is directed to the surface M of the disc to scan the data from the disc. The surface reflects the light beam from the disc, and the pits formed in the surface of the disc modulate the intensity of the beam reflected from the disc, and the data stored on the disc is monitored by monitoring the intensity of the reflected beam ( High or low) and reconstructed into a digital representation by forming the corresponding data composed of 1s and 0s. Some optical discs, such as magneto-optical discs or phase-change discs, can be read and written by the magneto-optical disc drive and the phase-change disc drive, respectively. In addition to reading and writing data from the disc, the beam can be used to generate signals that focus the beam on a desired data track on the disc. Printed by the Consumers' Cooperative of the Bureau of Standards and Loss of the Ministry of Economic Affairs (please read the precautions on the back before filling this page) The optical drive can use a rotary actuator to position the optical drive head, and the optical drive head can have a guideline for use An objective lens that beams the light onto the surface of the disc and can direct the light beam reflected from the disc. Typically, the light beam is generated by an optical module mounted on the bottom plate of the driver, and the reflective surface of a galvanometer is used to establish the connection between the optical module and the optical drive head. The purpose of the present invention is to provide the optical horizontal group on the rotary actuators. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm). Printed by A7, member of the Central Standards Bureau of the Ministry of Economic Affairs, Industrial and Consumer Cooperatives. B7 V. Description of the invention (2) Installation, thereby reducing the action of the galvanometer. Another object of the present invention is to provide a fixed spatial relationship between the objective lens, the galvanometer and the fixed optical sister. Other objects and advantages of the present invention will be described in the following description, and some of them will be obvious from the description, or may be learned by practicing the present invention. The objects and advantages of the present invention can be achieved and achieved by means and combinations specifically indicated in the scope of the patent application. The invention is fine; 沭 Generally, in one aspect, the present invention is characterized by a device for use in a light beam. The device has an arm with a rotatable shaft, and is configured to locate an optical drive head above a selected part of a disc. A light source is mounted on the arm and is configured to generate a light beam. A reflector of the disc drive is configured to receive the light beam and direct the light beam to a selected part of the optical actuator. The present invention may contain one or more of the following. The reflector may be a mirror surface with a fixed position; the reflector may be a mirror assembly of a micro-current meter, and the light source may include an optical module; the reflector may include a part of a reflective and partially transparent surface, the surface being positioned The light beam is reflected towards the optical drive head. At the same time, the device may contain a detector (e.g., a dual unit detector), which is positioned to intercept the rays of the light beam from the penetrating surface and provide an indication of the position of the beam on the surface based on the light penetrating the surface. The device may include a controller (e.g., a tracking servo loop and a galvanometer) that is connected to M to receive the instruction and locate the plane. The device may contain an optical module configured to generate a light beam; and a current -4- This paper size is applicable to China National Standard (CNS) A4 specification (210 × 297 mm) (Please read the precautions on the back before filling in this Page) Order A7 B7 5. Description of the invention (3) The meter has a reflective surface M to guide the light beam provided by the fixed optical group to the reflector. One axis of the galvanometer may be concentric with one axis of the axis of rotation of the rotatable arm; however, the axis of the galvanometer may be aligned with an axis other than the axis related to the axis of rotation of the rotatable arm. The optical drive head may be fixed to one end of the arm, and the galvanometer may be mounted on the surface of the arm and diametrically opposite to one end of the arm. The light beam generated by the light source can be in a plane actually parallel to the surface of the disc, and the light beam guided from the reflector to the optical head can be in a plane actually perpendicular to the surface of the disc. At the same time, the device may contain an imaging lens located between the light source and the reflector. Generally, in another aspect, the present invention is characterized by a method for use in an optical disc drive. The optical disc drive has an arm with a rotatable shaft connected to M to position an optical drive head above a selected portion of a disc. The method includes: generating a light beam from a light source mounted on the arm; and guiding a selected portion of one of the optical heads. Printed by the Local Standards Consumer Cooperative of the Ministry of Economic Affairs (Please read the notes on the back before filling out this page) The implementation of the present invention may include one or more of the following. The guiding method may include using a reflector; the guiding method may include using a galvanometer to configure a reflector to guide a light beam, and the light beam may be in a plane substantially parallel to a surface of a disc M and the guiding method may include using a galvanometer fixed to the arm and installed to guide the light beam toward the optical head. Roughly, in another aspect, the present invention is characterized by M-type devices for optical discs. The device has an arm, which is substantially parallel to one surface of the disc and is connected to an M-rotation axis about an axis located at one end of the arm. -5-This paper size applies to China National Standard (CNS) Α4 specification (210X 297 (Mm) A7 B7 printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Description of the invention (4) The arm is equipped with an optical drive head positioned at the top of a selected part of the disc near the other end of the arm . The device has a light source, which is installed near one end of the arm and is configured to generate a light beam in a plane substantially parallel to a surface of the disc. At the same time, the device has an imaging lens, a galvanometer, and a galvanometer, which are installed near one end of the arm and configured to position a first mirror surface to reflect the light beam generated by the light source through the imaging lens and toward the other end of the arm . The device has a second mirror surface mounted near the other end of the arm and configured to reflect the light beam reflected by the first mirror surface in a plane substantially perpendicular to the surface of the disc and toward the optical head. Generally, in another aspect, the present invention is characterized by a device for an optical disc. The device has an arm, which is substantially parallel to one surface of the disc and is connected to a rotation axis of M about an axis located at one end of the arm. The arm is configured to position a bit above a selected part of the disc. An optical drive head near the other end of the arm. The device has a light source, which is installed near one end of the arm and is configured to generate a light beam in a plane substantially parallel to a surface of the disc. At the same time, the device has a galvanometer mounted near the other end of the arm and configured to position a mirror to reflect the light beam in a plane substantially perpendicular to the surface of the disc and towards the optical drive head. In general, in another aspect, the present invention is a method for using an optical disc drive as an ultra-excitation. The optical disc drive has an arm with a rotatable shaft and is connected to M to position an optical drive head above a selected part of a disc. The method includes: generating a light beam through a light source; and rotating the light -6-This paper size applies the Chinese National Standard (CNS) A4 specification (210'〆297 mm) (Please read the precautions on the back before filling This page), 1T \) rl A7 B7 5. Invention description (5) Source M traces the movement of the arm. The description of the drawing house is incorporated in this specification and constructs a part of the drawings of the present invention, together with the general description above and the following detailed description, to explain the principle of the present invention, in which: FIG. 1 is a disc drive Top view of the actuator; Figure 2 is a side view of the disk drive actuator of Figure 1; Figure 3 is a top view of the disk drive actuator of an alternative embodiment; and Figure 4 and Figure 4 are Schematic diagram of an optional embodiment of a disc M drive actuator.时 住 实 实 _Example: Printed by a member of the Central Standards Bureau of the Ministry of Economic Affairs, Industrial and Consumer Cooperatives (please read the precautions on the back before filling out this page). As shown in Figures 1 and 2, in an optical disc actuator, an optical The module 100 communicates with an optical drive head 107 via a light beam (for example, laser light) to read data from an upper surface 211 of an optical disc 1.12. The optical module 100 is mounted on a rotary actuator 103; the actuator 103 has an arm in a plane substantially parallel to the surface 211, and uses a K-rotation axis on a vertical axis 200 and positioning An optical drive head 107 is above an area selected by one of the planes 211. Because the optical module 100 is mounted on the actuator 103 and rotates on the arm 110, the predetermined spatial relationship is maintained between the optical module 100 and the driving head 107 regardless of the position of the arm 110. In order to retrieve data from the disc 112, the light beam generated by the module 100 travels along three optical paths 106, 108, and 109 to the optical drive head 107, which is positioned by the wall 110 above the upper surface of the disc 112 . -7- This paper size applies Chinese National Standard (CNS) A4 specification (210 × 297 mm). Member of the Central Standards Bureau of the Ministry of Economic Affairs. Printed by Industrial and Consumer Cooperatives. A 7 B7 V. Description of the invention (6) Optical paths 106 and 108 are in one substance In a plane parallel to the surface 211, the optical path 109 is in a plane substantially perpendicular to the surface 211. The optical drive head 107 transmits the light beam starting from the module 100 to the surface 211 that reflects the light beam. The optical drive head 107 guides the light beam reflected from the surface 211 back to the light beam path 109. The reflected light beam follows the optical path 109, 108 and 106 to module 100, and the data taken from the surface 211 is extracted there. In order to precisely position the light beam generated by the optical module 100 on the driving head 107 (M and above one of the selected trajectories on the surface 211), a movable galvanometer 10 4 mirror 102 is positioned to connect the optical Paths 106 and 108. For each position of the mirror surface 102, when the wall 110 rotates, a predetermined spatial relationship exists between the optical module 100 and the mirror surface 102. Therefore, by rotating the mirror surface 102, the galvanometer 104 provides a fine trace of the beam contact between the optical module 100 and the surface 211. On the other hand, the rough tracking of the beam connection between the optical module 100 and the surface 211 is provided by the rotation of the arm 110. The optical module 100 is mounted on the top of the cylindrical axle 136 of the rotary actuator 103, the axle 136 is coaxial with the shaft 200, and the bottom of the axle 136 is mounted on a cylindrical mounting tube 134 fixed on a driver substrate 135. The actuator arm 110 extends laterally from the side of the wheel shaft 136 to the head 107 above the surface 211. The galvanometer 104 is mounted on the rotary actuator 103 so that the galvanometer 104M rotates at the same angle as the rotary actuator 103. The reflective surface of the galvanometer mirror 102 may be located near the axis of rotation of the galvanometer 104 and may be mounted elsewhere, as described below. In order to control the movement of the arm 110, the rotary actuator 103 includes a line of -8-This paper size applies to China National Standard (CNS) A4 specifications (210X297 mm) (Please read the precautions on the back before filling this page) Printed by the Central Standards Bureau of the Ministry of Economic Affairs, printed by the local consumer cooperative A7 B7 V. Description of the invention (7) The ring 103 is located on the side of the wheel shaft 136 and is diametrically opposite to the actuator arm 110. The coil 130 electromagnetically interacts with a magnet 132 (mounted on the driver substrate 135) to control the rotation axis of the rotary actuator 103 controlled by the 200-axis rotation axis. The actuator arm 110 contains an elastic deflector 202 which extends downward. The actuator arm 110 is positioned to position the optical driver head 107 near the surface 211. As shown in FIG. 2, the optical path 108 opens the wheel axis 136 along the arm 110. An imaging lens 115 exists along the path 108 perpendicular to the path 108 and near the end of the actuating arm 110 of the young wheel axis 136. A fixed mirror surface 114 connects the optical paths 108 and 109. In order to locate the optical path 10 (ie, to establish the connection of the light beam to a selected portion of one of the surfaces 211), a dual-unit detector 166 is mounted on the back of the mirror 114, which is partially transparent and The brightness of the light beam generated by the optical module 100 is allowed to be detected by the detector 166. A galvanometer servo feedback loop (not shown) uses the information provided by the detector 166 to control the position of the galvanometer mirror 102, which points to the path of the optical path 109. Meanwhile, the rotary actuator 103 includes another actuator arm 111, which is located below the arm 110 and is substantially parallel to the arm 110. The actuator arm 111 has the same components as those described above for use under the optical disc 112. Surfaces 210 interact with each other to read the bottom surface of the disc. The other optical module 100 may be installed at the bottom of the wheel shaft 136, or alternatively, a mirror or a mirror may allow light to be connected to the optical actuation heads of the optical module 100 and the actuator arm 11 Way to install. In order to generate the light beam, the optical module 100 contains: a laser module 150 which conforms to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) along the paper scale (please read the precautions on the back before filling this page) Order A7 B7 V. Description of the invention (8) The optical path 106 projects the light beam through a collimating lens 152; a polarization / beam splitter 154; M and a collimating / correcting lens 156. The light beam reflected from the surface 211 passes through the lens 156 along the optical path 106 through the mirror 102 and is transferred by the beam splitter 154 to the server and data detector 160 of the optical module 100. The data detector 160 extracts data from the light beam reflected from the dish 112. _ In other embodiments in the field of the present invention, for example, as shown in FIG. 3; the galvanometer 104 may optionally be M-mounted on the top of the wheel shaft along a position opposite to the diameter of the actuator arm 110 instead of At the center of rotation of the rotary actuator 103. In this embodiment, the mirror 102 is still parallel to the shaft 200, and the mirror 102 extends above the top surface of the wheel shaft 136. In this embodiment, the optical module 100 communicates with the driving head 107 via the optical paths 108, 109, and 300. The optical path 300 replaces the optical path 106, and the mirror surface connects the optical path 106 to the optical path 108, and the light beam reflected from the disc 112 traverses the optical paths 108-109 and 300. Printed by the Consumer Standard Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page) In another embodiment, as shown in Figure 4, a micro-current meter mirror assembly 400 (for example, A digital micromirror device (DVD) (mirror micromirror surface) produced by the German instrument company replaces the fixed mirror surface 114. In this embodiment, the ammeter 104 and its mirror 102 are removed. Furthermore, the optical module 100 is mounted on the wheel shaft 136 along the diameter opposite to the arm U0. The optical module 100 establishes a light east connection with the drive head 107 via an optical path 109 and an optical path 401. The optical path 401 is in a plane substantially parallel to the surface 211 and extends along the arm 110 from the optical module 100 to the micro galvanometer mirror 400. One of the assembly 400 is partially reflective-10- This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) A7 ____B7 V. Description of the invention (9) Surface 405 connects paths 401 and 109 and provides optical paths Positioning of 109 on the driving head 107. Because the surface 405 is partially light-transmitting, a view mounted on the axillary surface of Table 40 is shown on the back. It should be 6 sfe on the surface of the channel, and it should be accurately guided. 40r «Shadow light feed surface reverse surface Supplied by the reverse surface surface to change the eye blink axis shield shield f positive S the 3 follow the path to move and drive a drive self-study beam of light-one to the beam of light to produce M the Using Guide 1 and the source of Yuan Mingguang's theory, the movements caused the type to turn up the comprehensive rotation and clarify the original, but said that M to 0 cases, the law enforcement and the better than the pretend one has been issued. The selected copy of the book was transferred to Fan Fanming's copy. 0. Prescribes the Shi Shushi's Fanweili speciality, and please draw the application of the limit of acceptance of the record (please read the note on the back first) Please fill in this page for further details.) The paper printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs is compliant with China National Standard (CNS) A4 (210X 297 mm).