200828294 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種光學讀寫頭裝置，特別 一種多波長光學讀寫頭裝置。 ' 【先前技射ί】 近年來，由於生活水準的提高，人們對儲存媒體 量需求也愈來愈高。隨著數位電視的開播，光儲存進入: 光領域是必然的趨勢，然而在實踐藍光儲存的同時， Φ 也必需考量先如系統相容的問題。更明確地說，也就;要 能相容CD、DVD與藍光三種規格，如此一來光學頭 計就變得非常複雜，體積也跟著變大。因此，本發明針二 此一問題，提出一多波長光學讀寫頭架構，利用^件共用 達成元件數量降低、體積小、成本降低的目的。 ^ 美國專利第US 6,304,542號揭露一種適用於CD與 DVD雙波長光學讀寫頭，採用多種共用元件，以達讀寫 頭積體化的目的。然而，僅整合CD與DVD雙波長光^ 項寫頭仍無法滿足監光南解析度的需求。 _ 第1圖係顯示傳統適用於CD、DVD及藍光的三波長 光學讀寫頭裝置的讀取光路徑示意圖。於第1圖中，各別 採用三組雷射二極體光源Π0、120及130及對應的三組 分光菱鏡Π5、125及135。雷射二極體光源11〇、12〇及 130所發出之雷射光各別經過對應的光柵〗12、122及132 經三組分光菱鏡115、125及135後，再經準直鏡140後， 藉由反射鏡150反射，經1/4λ波板155於物鏡160到達 待讀取的碟片170。接著，於反射時，光路徑經三組分光 菱鏡 115、125 及 135 ’ 並經柱狀透鏡（Cyiinder lens) 180 0949-A21761 TW(N2) ；P51950073TW；jamngwo 5 200828294 後’抵達光偵測器積體電路（ph〇t〇 detector integrated circuit，簡稱 PDIC)元件 i9〇 〇 雖然第1圖的結構簡單，然而因為準直鏡14〇對不同 波長的焦距都不同。因此在讀取不同型態的碟片時，準直 •鏡140必須微量移動，這對藍光等級光學讀寫頭的控制困 難度極高。對於應用於藍光的系統，此光學讀寫頭架構在 實際控制協同動作非常困難。 再者’習知技術採用三組分光菱鏡115、125及135， 分光菱鏡具較複雜的結構與較高的單價，因此直接增加三 • 波長光學讀寫頭裝置的製造成本。 第2圖係顯示傳統另一適用於CD、DVD及藍光的三 波長光學讀寫頭裝置的讀取光路徑示意圖。於第2圖中， 就OVD與藍光讀取格式而言，其對應雷射二極體光源210 及230所發出之雷射光各別經過對應的光柵212及232， 經分光菱鏡215及235，藉由反射鏡250反射經準直鏡260 及物鏡270到達待讀取的碟片（未繪示）。接著，於反射時， 回光路徑經分光菱鏡240及分光菱鏡235折射後，並經柱 φ 狀透鏡(cylinder lens) 280，抵達光偵測器積體電路(PDIC) 元件290。本習知技術係共用DVD與藍光HD-DVD格式 的光學感測器積體電路(PDIC)元件290，然而，DVD與藍 光格式仍具不同波長，使其共同聚焦於同一 PDIC元件290 上’仍有實際的困難。 另一方面，就傳統CD格式而言，其採用一全像雷射 光學元件220。全像雷射光學元件220包括〇〇雷射光源 (波長約780nm)、繞射光柵及光偵測器元件。CD的讀取 光學路徑係由全像雷射光學元件220發出雷射光（波長約 〇949-A2l761TW(N2)；P51950073TW；jamngwo 6 200828294 780nm)，經分光菱鏡215及240到達物鏡系統。於反射時， 亦經由原光學路徑，達立體全像雷射光學元件220。然而， 由於全像雷射光學元件220具複雜的多重功能，其整合元 件價格昂貴，直接增加三波長光學讀寫頭裝置的製造成 本0 【發明内容】 有鑑於此，本發明之目的在於提供一種多波長光學讀 寫頭裝置。提供一種同時具備至少三種波長的讀寫頭光路 φ 架構，透過部分元件共用，使整體光學頭的元件數量降 低，體積亦有效地縮小，達成體積縮小、成本降低的目標。 為達上述目的，本發明提供一種多波長光學讀寫頭裝 置，包括：一第一雷射二極體發出第一波長的雷射光，及 其對應的一第一光栅；一第二雷射二極體發出第二波長的 雷射光與一第三雷射二極體發出第三波長的雷射光，及其 各別對應的一第二光柵與第三光柵；一第一分光菱鏡用以 分離該第二雷射二極體與該第三雷射二極體所發出光路 徑；一第二分光菱鏡以反射該第一雷射二極體所發出雷射 • 光;一物鏡系統包括一反射鏡、一準直鏡、一 1/4波長板、 及一物鏡；一第一分光鏡與一第一光偵測器對應該第一波 長雷射光經該物鏡系統的反射光路徑；以及一第二分光鏡 與一第二光偵測器對應該第二波長雷射光與該第三波長 雷射光經該物鏡系統的反射光路徑。 為達上述目的，本發明另提供一種多波長光學讀寫頭 裝置，包括：一第一雷射二極體發出第一波長的雷射光， 與對應的一第一光柵;一第二雷射二極體發出第二波長的 0949-A21761TW(N2)；P51950073TW；jamngwo 7 200828294 雷射光與第三波長的雷射光，對應的一第二光柵；一分光 菱鏡以反射該第一雷射二極體所發出第一波長的雷射 光；一物鏡系統包括一反射鏡、一準直鏡、一 1/4波長板、 及一物鏡；一第一分光鏡與一第一光偵測器對應該第一波 長雷射光經該物鏡系統的反射光路徑；以及一第二分光鏡 與一第二光偵測器對應該第二波長雷射光與該第三波長 雷射光經該物鏡系統的反射光路徑。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup device, and more particularly to a multi-wavelength optical pickup device. '[Previous technology] In recent years, due to the improvement of living standards, people's demand for storage media has become higher and higher. With the launch of digital TV, optical storage enters: The optical field is an inevitable trend. However, while practicing Blu-ray storage, Φ must also consider problems such as system compatibility. More specifically, it is also compatible with CD, DVD and Blu-ray. As a result, the optical heading becomes very complicated and the volume becomes larger. Therefore, in the second aspect of the present invention, a multi-wavelength optical pickup structure is proposed, which utilizes the sharing of components to achieve the purpose of reducing the number of components, small size, and cost reduction. U.S. Patent No. 6,304,542 discloses a dual-wavelength optical read/write head for CD and DVD, which employs a variety of shared components for the purpose of integrating the read/write heads. However, the integration of CD and DVD dual-wavelength optical write heads still does not meet the needs of the accelerative resolution. _ Figure 1 shows a schematic diagram of the read light path of a conventional three-wavelength optical pickup device for CD, DVD and Blu-ray. In Fig. 1, three sets of laser diode sources Π0, 120 and 130 and corresponding three sets of beamsplitters 、5, 125 and 135 are used. The laser light emitted by the laser diode sources 11〇, 12〇 and 130 respectively passes through the corresponding gratings 12, 122 and 132 through the three-component optical mirrors 115, 125 and 135, and then passes through the collimating mirror 140. , reflected by the mirror 150, reaches the disc 170 to be read via the 1/4 λ wave plate 155 at the objective lens 160. Then, during reflection, the light path passes through the three-component optical mirrors 115, 125 and 135' and passes through a cylindrical lens (Cyiinder lens) 180 0949-A21761 TW (N2); P51950073TW; jamngwo 5 200828294 after the arrival of the light detector The integrated circuit (PDIC) element i9 is simple in structure, but the focal length of the collimating mirror 14 is different for different wavelengths. Therefore, when reading discs of different types, the collimating mirror 140 must be slightly moved, which is extremely difficult to control the blue-level optical head. For systems used in Blu-ray, this optical read/write head architecture is very difficult to actually control the coordinated action. Furthermore, the conventional technology employs three-component optical mirrors 115, 125, and 135. The spectroscopic mirror has a relatively complicated structure and a high unit price, thereby directly increasing the manufacturing cost of the three-wavelength optical pickup device. Figure 2 is a schematic diagram showing the read light path of another conventional three-wavelength optical pickup device suitable for CD, DVD and blue light. In Fig. 2, in the case of the OVD and blue light reading formats, the laser light emitted by the corresponding laser diodes 210 and 230 passes through the corresponding gratings 212 and 232, respectively, through the beamsplitters 215 and 235, The mirror 250 is reflected by the mirror 250 and the objective lens 270 reaches the disc to be read (not shown). Then, during reflection, the return path is refracted by the beam splitter 240 and the beam splitter 235, and passes through the column lens 280 to the photodetector integrated circuit (PDIC) element 290. The prior art technique shares the optical sensor integrated circuit (PDIC) component 290 of the DVD and Blu-ray HD-DVD format, however, the DVD and Blu-ray formats still have different wavelengths, causing them to be collectively focused on the same PDIC component 290. There are practical difficulties. On the other hand, in the case of the conventional CD format, it uses a holographic laser element 220. The hologram-like laser optical element 220 includes a xenon laser source (wavelength of about 780 nm), a diffraction grating, and a photodetector element. CD reading The optical path is laser light emitted by the holographic optical element 220 (wavelength 约949-A2l761TW(N2); P51950073TW; jamngwo 6 200828294 780nm), which reaches the objective system via the beamsplitters 215 and 240. During reflection, the stereo holographic laser element 220 is also passed through the original optical path. However, since the holographic optical element 220 has complicated multiple functions, the integrated components are expensive, and the manufacturing cost of the three-wavelength optical pickup device is directly increased. [In view of the above, it is an object of the present invention to provide a Multi-wavelength optical read/write head device. Providing a read/write head optical path φ structure having at least three wavelengths at the same time, through the sharing of some components, the number of components of the overall optical head is reduced, and the volume is also effectively reduced, thereby achieving the goal of volume reduction and cost reduction. To achieve the above objective, the present invention provides a multi-wavelength optical pickup device comprising: a first laser diode emits a first wavelength of laser light, and a corresponding first grating; and a second laser The polar body emits a second wavelength of laser light and a third laser diode emits a third wavelength of laser light, and a corresponding second grating and a third grating; a first beam splitter for separating a light path emitted by the second laser diode and the third laser diode; a second beam splitter for reflecting the laser light emitted by the first laser diode; an objective system comprising a mirror, a collimating mirror, a quarter-wave plate, and an objective lens; a first beam splitter corresponding to a first photodetector corresponding to the reflected light path of the first wavelength of the laser beam passing through the objective lens system; The second beam splitter and the second photodetector correspond to the reflected light path of the second wavelength laser light and the third wavelength laser light passing through the objective lens system. In order to achieve the above object, the present invention further provides a multi-wavelength optical read/write head device, comprising: a first laser diode emits a first wavelength of laser light, and a corresponding first grating; and a second laser The polar body emits a second wavelength of 0949-A21761TW (N2); P51950073TW; jamngwo 7 200828294 laser light and a third wavelength of laser light, corresponding to a second grating; a beaming mirror to reflect the first laser diode a first wavelength of laser light emitted; an objective lens system comprising a mirror, a collimating mirror, a quarter wave plate, and an objective lens; a first beam splitter corresponding to a first photodetector The wavelength of the laser beam passes through the reflected light path of the objective lens system; and a second beam splitter and a second photodetector correspond to the reflected light path of the second wavelength of the laser light and the third wavelength of the laser light passing through the objective lens system.
為達上述目的，本發明又提供一種多波長光學讀寫頭 衣置，包括·一第一雷射二極體發出第一波長的雷射光， 與其對應的一第一光柵；一第二雷射二極體發出第二波長 的雷射光或第三波長的雷射光，與其各別對應的一第二光 栅與第三光柵；一分光菱鏡用以反射該第一雷射二極體所 發出之雷射光；一物鏡系統包括一反射鏡、—準直器、一 對庫、物鏡，—第—分光鏡與—第—光偵測器 子，该弟一波長雷射光經該物鏡系統的反射光路徑；以 一第二分光鏡與一第二光偵測器對應該第二 =+ 與該第三波f雷射光經該物鏡系㈣反射_^田、 為使本發明之上述目的、特徵和優點能 下文特舉較佳實施例，並配合所附圖式，作詳細戈明如下· 【實施方式】 本發明係關於一種適用於CD、j)VD及齡、> 光學讀寫頭裝置，利用分光鏡片將不同波長$光的三波長 離，其中有的波長的反射光穿透該分光鏡，有回光予以分 射光則反射循另-路徑，使得多種波長可 0949-A21761TW(N2)；P51950073TW；jamngwo 8 200828294 成元件數罝減低、體積小、成本降低的目的。 根據本發明實施例，利用傳統的DVD_RW光學讀寫 頭的光路架構。將回光部分採雙平板設計，其中藍光回光 採穿透設計，CD及DVD回光部分則利用後方平板第〜 反射面將回光反射，再入射對應的pmc元件。整體光路 元件大部为共用，且光路架構簡單易於實施，不僅可降低 成本’裝置本身的體積也可以縮小。 第3圖係顯示根據本發明實施例之適用於cD、dvd 及藍光的多波長光學讀寫頭裝置的光路示意圖。請參閱第 • 3圖，本實施例之光學讀寫頭的光路採分離式結構，亦即 CD、DVD及監光的雷射光源31〇、32〇及33〇各自獨立。 其中藍光的入射光路係由雷射二極體（laser di〇de，LD) 310發出後（波長約405奈米（nm))，先經過一光栅312， 然後再射入偏極化分光菱鏡(PBS) 315。由偏極化分光菱 鏡(PBS) 315反射後，接著進入物鏡系統35〇。雷射光進 入物鏡系統的過程為，先入射一反射鏡(f〇ld mirr〇r)，然 後雷射光被反射向上’再入射準直鏡。此時原本發散的雷 _射光會變成平行光’然後又入射1/4波長板，將原本線性 偏振的雷射光轉換成圓偏振的雷射光。之後再入射一彩色 濾光片（color filter)，以決定光束有效徑，最後入射聚焦 物鏡，將雷射光聚於碟片370上。 之後’碟片又將雷射光反射回去，基本上被反射的雷 射光會循原路彳至回去’但在經過1 / 4波長板時，圓低讲去 又會變回線性偏振光，但是此時雷射光的偏振方向會與原 入射雷射光的偏振方向互相垂直。當雷射光經過反射鏡 (fold mirror)之後’入射偏極化分光菱鏡(pBS)315時，會 0949-A21761 TW(N2)；P51950073TW；jamngwo 9 200828294 以p偏振光的型態入射，此時雷射光會走穿透路徑。在經 過第一平板分光鏡340及第二平板分光鏡345時，會走穿 透路徑，最後抵達入射光偵測器積體電路（PDIC)元件 390。接著，光偵測器積體電路(1>1)1〇元件39〇會將光訊 號轉換成所需的伺服訊號及射頻（RF)訊號。 關於DVD碟片的讀寫部分，其工作方式如下所述。 以波長約650奈米（nm)的雷射光自DVD雷射二極體（laser diode ’ LD) 320發射之後，先經過對應的光柵322，然後 再穿透分光菱鏡325入射第一平板分光鏡340，此時雷射 # 光被反射後，然後入射偏極化分光菱鏡(PBS) 315，接著 進入物鏡系統350。雷射光進入物鏡系統的過程為，先經 過反射鏡（fold mirror)反射後又入射準直鏡。此時原本發 散的雷射光會變成平行光。接著，雷射光又入射1/4波長 板，將原本線性偏振的雷射光轉換成圓偏振的雷射光。然 後再入射聚焦物鏡，最後將雷射光聚焦在碟片37〇的資料 上。如同前述藍光一般，之後碟片又將雷射光反射回去， 基本上被反射的雷射光會循原路徑回去，但在經過1/4波 φ 長板時，圓偏振光又會變回線性偏振光。當雷射光經過反 射鏡(fold mirror)之後，入射偏極化分光菱鏡(pBS) 315時 使以線性偏振光入射。在經過第一平板分光鏡340時，部 分雷射光會走穿透路徑，但在經過第二平板分光鏡345 時，會走反射路徑，在經平凹透鏡380之後，最後抵達入 射第二光偵測器積體電路(PDIC)元件385。接著，第二光 偵測器積體電路(PDIC)元件385會將光訊號轉換成所需 的伺服訊號及射頻（RF)訊號。 再者，關於CD碟片的讀寫部分，其工作方式如下所 0949-A21761TW(N2)；P51950073TW；iamngwo t Γ 200828294 述。以波長約780奈米（nm)的雷射光自CD雷射二極體 (laser diode，LD) 330發射之後在經過對應的光栅332， 然後再穿透分光菱鏡325入射第一平板分光鏡340,之後 光束行進的路徑大致與DVD雷射相同，但是在入射物鏡 前會經過彩色濾光片（color filter)，以決定光束有效徑， 然後再入射聚焦物鏡，最後將雷射光聚焦在碟片資料上。 之後碟片又將雷射光反射回去’被反射的雷射光基本 上會與DVD雷射光相仿，在經過第一平板分光鏡34〇時， 會走牙透路控，但在經過第二平板分光鏡345時，會走反 • 射路徑，在經平凹透鏡380之後，最後抵達入射第二光镇 測器積體電路(PDIC)元件385。接著，第二光债測器積體 笔路(PDIC)元件3 85會將光訊號轉換成所需的伺服訊號 及射頻（RF)訊號。 弟4圖係顯示根據本發明另一實施例之適用於、 DVD及藍光的多波長光學讀寫頭裝置的光路示意圖。第* 圖中的多波長光學讀寫頭裝置’其結構與光路相似於第3 圖的多波長光學讀寫頭裝置，在此省略相同的敘述。本發 參明第4圖中的多波長光學讀寫頭裝置的實施例與第4圖^ 的多波長光學讀寫頭裝置的實施例不同之處在於，第二實 施例使用雙波長雷射二極體，其同時整合包括CD與 兩種波長的雷射二極體，以進一步縮減多波長光學讀寫頭 裝置所佔的體積。此外，本實施例僅使用一分光菱鏡@ 弘 因此直接減少多波長光學讀寫頭裝置的製造成本^ 在上述第3圖與第4 ®的第-域測器積體電路 (PDIC)元件與第二光偵測器積體電路(PDIC)元件，在某些 情況下位置是可以互相對換的，例如藍光雷射回光最^是 0949~A21761 TW(N2) »P51950073TW"»jannn9W〇 11 200828294 經第一平板分光鏡反射以後再入射對應的光偵測器積體 電路(PDIC)元件，而CD與DVD兩種雷射的回光最則是 穿透第一平板分光鏡以後，再穿透第二平板分光鏡最後入 射所對應的光偵测器積體電路(PDIC)元件。當然、此時第 一平板分光鏡及第二平板分光鏡其所對應的鍍膜亦須配 合改變。 同理、在上述第3圖與第4圖的第一波長雷射二極體 與第二波長及第三波長雷射二極體的位置也是彼此可以 互換的，只是此時第一平板分光鏡及第二平板分光鏡以及 φ 偏極化分光菱鏡等相關元件其所對應的鍍膜亦須配合政 變。 本發明雖以較佳實施例揭露如上，然其並非用以限定 本發明的範圍，任何所屬技術領域中具有通常知識者，在 不脫離本發明之精神和範圍内，當可做些許的更動與潤 飾，因此本發明之保護範圍當視後附之申請專利範圍所界 定者為準。In order to achieve the above object, the present invention further provides a multi-wavelength optical reading and writing head garment comprising: a first laser diode emitting a first wavelength of laser light, a first grating corresponding thereto; and a second laser The diode emits a second wavelength of laser light or a third wavelength of laser light, and a second grating and a third grating corresponding thereto; a beaming mirror for reflecting the first laser diode Laser light; an objective lens system comprising a mirror, a collimator, a pair of banks, an objective lens, a first beam splitter and a first light detector, the light of the wavelength of the laser passing through the objective system a path; a second beam splitter corresponding to a second photodetector corresponding to the second =+ and the third wave f of the laser light reflected through the objective lens system (four), in order to achieve the above objects, features and features of the present invention Advantages The following embodiments are described in detail, and in conjunction with the drawings, detailed descriptions are given below. [Embodiment] The present invention relates to an optical head device suitable for CD, j) VD and age, > Using a spectroscopic lens to separate the three wavelengths of different wavelengths of light, some of which The long reflected light penetrates the beam splitter, and the reflected light is split to reflect the other path, so that the various wavelengths can be 0949-A21761TW(N2); P51950073TW; jamngwo 8 200828294 The number of components is reduced, the volume is small, and the cost is reduced. the goal of. In accordance with an embodiment of the present invention, the optical path architecture of a conventional DVD_RW optical read/write head is utilized. The returning part adopts a double-plate design, in which the blue light is transmitted through the design, and the CD and DVD returning parts are reflected by the rear flat-reflecting surface, and then the corresponding pmc components are incident. Most of the optical path components are shared, and the optical path structure is simple and easy to implement, which not only reduces the cost, but also reduces the size of the device itself. Fig. 3 is a view showing an optical path of a multi-wavelength optical pickup device suitable for cD, dvd and blue light according to an embodiment of the present invention. Referring to Fig. 3, the optical path separating structure of the optical pickup head of the present embodiment, that is, the CD, DVD, and the laser light sources 31, 32, and 33 are independently independent. The incident light path of the blue light is emitted by a laser diode (LD) 310 (wavelength about 405 nanometers (nm)), first passes through a grating 312, and then enters the polarization beam splitting mirror. (PBS) 315. After being reflected by a polarized beam splitting mirror (PBS) 315, it is then directed to the objective system 35. The process of entering the objective lens system by laser light is to first incident a mirror (f〇ld mirr〇r), and then the laser light is reflected upwards and re-injected into the collimating mirror. At this time, the originally diverged lightning ray will become parallel light and then incident on the 1/4 wavelength plate, converting the originally linearly polarized laser light into circularly polarized laser light. Then, a color filter is incident to determine the effective path of the beam, and finally the focusing objective is incident on the disk 370. After that, the disc will reflect the laser light back, and the substantially reflected laser light will follow the original path to go back. But when passing through the 1/4 wavelength plate, the round low will return to linearly polarized light, but this The polarization direction of the laser light is perpendicular to the polarization direction of the original incident laser light. When the laser light passes through a mirror and is incident on a polarized beam splitter (pBS) 315, it will be 0949-A21761 TW(N2); P51950073TW; jamngwo 9 200828294 is incident on the form of p-polarized light. The laser light will go through the path. When passing through the first plate beam splitter 340 and the second plate beam splitter 345, it will walk through the path and finally reach the incident light detector integrated circuit (PDIC) element 390. Then, the photodetector integrated circuit (1 > 1) 1 〇 component 39 〇 converts the optical signal into a desired servo signal and radio frequency (RF) signal. Regarding the read/write portion of a DVD disc, its operation is as follows. After being emitted from a DVD laser diode LD 320 with a laser having a wavelength of about 650 nanometers (nm), it passes through a corresponding grating 322, and then passes through a beaming mirror 325 to enter the first plate beam splitter. 340, at this time, the laser # light is reflected, then enters the polarization polarizing mirror (PBS) 315, and then enters the objective system 350. The process of entering the objective lens system by laser light is first reflected by a mirror and then incident on the collimator. At this time, the originally scattered laser light will become parallel light. Then, the laser light is incident on the 1/4 wavelength plate to convert the originally linearly polarized laser light into circularly polarized laser light. Then, the focus objective lens is incident, and finally the laser light is focused on the data of the disc 37〇. As with the aforementioned blue light, the disc then reflects the laser light back, and the substantially reflected laser light will follow the original path, but when the 1/4 wave φ long plate passes, the circularly polarized light will return to linearly polarized light. . When the laser beam passes through the fold mirror, it is incident on the polarized beam (pBS) 315 when it is incident on the linearly polarized light. When passing through the first plate beam splitter 340, part of the laser light will go through the path, but when passing through the second plate beam splitter 345, the reflection path will be taken, and after passing through the plano-concave lens 380, finally reaching the second light detection. A device integrated circuit (PDIC) component 385. Next, a second photodetector integrated circuit (PDIC) component 385 converts the optical signal into a desired servo signal and radio frequency (RF) signal. Furthermore, regarding the read/write portion of the CD disc, the working mode is as follows: 0949-A21761TW(N2); P51950073TW; iamngwo t Γ 200828294. The laser light having a wavelength of about 780 nanometers (nm) is emitted from the CD laser diode (LD) 330, passes through the corresponding grating 332, and then passes through the beam splitting mirror 325 to enter the first flat beam splitter 340. Then, the path of the beam travels is roughly the same as that of the DVD laser, but passes through a color filter in front of the incident objective to determine the effective path of the beam, then enters the focusing objective, and finally focuses the laser light on the disc data. on. The disc then reflects the laser light back. 'The reflected laser light will basically resemble the DVD laser light. When passing through the first flat beam splitter 34, it will go through the path, but after passing through the second flat beam splitter. At 345, the reverse path is taken, and after passing through the plano-concave lens 380, it finally reaches the incident second photo-detector integrated circuit (PDIC) element 385. Next, the second optical debt detector integrated circuit (PDIC) component 3 85 converts the optical signal into a desired servo signal and radio frequency (RF) signal. Figure 4 is a schematic view showing an optical path of a multi-wavelength optical pickup device suitable for use in DVD and blue light according to another embodiment of the present invention. The multi-wavelength optical pickup device of the first embodiment has a structure similar to that of the multi-wavelength optical pickup device of Fig. 3, and the same description is omitted here. The embodiment of the multi-wavelength optical pickup device of FIG. 4 differs from the embodiment of the multi-wavelength optical pickup device of FIG. 4 in that the second embodiment uses a dual-wavelength laser II. A polar body that simultaneously integrates a laser and a laser diode of two wavelengths to further reduce the volume occupied by the multi-wavelength optical pickup device. In addition, this embodiment uses only a beam splitter @ 弘, thus directly reducing the manufacturing cost of the multi-wavelength optical pickup device ^ in the above-mentioned 3rd and 4th -th domain detector integrated circuit (PDIC) components and The second photodetector integrated circuit (PDIC) component can be interchanged in some cases. For example, the blue laser is the most suitable for 0949~A21761 TW(N2) »P51950073TW"»jannn9W〇11 200828294 After the first plate beam splitter is reflected, it will be incident on the corresponding photodetector integrated circuit (PDIC) component, and the CD and DVD laser return light will penetrate the first plate beam splitter and then wear it. The second flat beam splitter is finally incident on the corresponding photodetector integrated circuit (PDIC) component. Of course, at this time, the corresponding plating film of the first plate beam splitter and the second plate beam splitter must also be matched and changed. Similarly, the positions of the first wavelength laser diode and the second wavelength and third wavelength laser diodes in the above FIGS. 3 and 4 are also interchangeable, but only the first plate beam splitter at this time. And the corresponding coatings of the second flat beam splitter and the φ polarized beam splitting mirror are also required to cooperate with the coup. The present invention has been disclosed in the above preferred embodiments, and is not intended to limit the scope of the present invention. Any one of ordinary skill in the art can make a few changes without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.
0949-A21761 TW(N2)；P51950073TW；jamngwo 12 200828294 【圖式簡單說明】 第1圖係顯示傳統適用於CD、DVD及藍光的三波長 光學讀寫頭裝置的光路示意圖； 第2圖係顯示傳統另一適用於CD、DVD及藍光的三 波長光學讀寫頭裝置的光路示意圖； 第3圖係顯示根據本發明實施例之適用於CD、DVD 及藍光的多波長光學讀寫頭裝置的光路示意圖；以及 第4圖係顯示根據本發明另一實施例之適用於CD、 I DVD及藍光的多波長光學讀寫頭裝置的光路示意圖。 【主要元件符號說明】 習知部分（第1、2圖） 100〜三波長光學讀寫頭裝置； 110、230〜第一雷射二極體光源； 120、210〜第二雷射二極體光源； 220〜全像雷射光學元件； 130〜第三雷射二極體光源； _ 112、122、132、212、232〜光柵； 115、125、135、215、235、240〜分光菱鏡； 140、260〜準直鏡； 150、250〜反射鏡； 160、270〜物鏡； 170〜碟片； 180、280〜柱狀透鏡； 190、290〜光偵測器積體電路元件。 0949-A21761TW(N2)；P51950073TW；jamngwo 13 200828294 本案部分（第3、4圖） 310、410〜藍光雷射光源； 320〜WD雷射光源； 330〜CD雷射光源； 420〜CD、DVD共用雷射光源； 312、322、332、412、422〜光柵； 315、325、415〜分光菱鏡； 350、450〜物鏡系統； 340、440〜第一平板分光鏡； • 345、445〜第二平板分光鏡； 370、470〜碟片； 380、480〜平凹透鏡； 390、490〜第一光偵測器積體電路元件； 385、485〜第二光偵測器積體電路元件。0949-A21761 TW(N2); P51950073TW; jamngwo 12 200828294 [Simplified Schematic] Figure 1 shows the optical path of a traditional three-wavelength optical pickup device for CD, DVD and Blu-ray; Figure 2 shows the traditional Another optical path diagram of a three-wavelength optical pickup device suitable for CD, DVD, and blue light; FIG. 3 is a schematic diagram showing an optical path of a multi-wavelength optical pickup device suitable for CD, DVD, and blue light according to an embodiment of the present invention. And FIG. 4 is a view showing an optical path of a multi-wavelength optical pickup device suitable for CD, I DVD, and blue light according to another embodiment of the present invention. [Main component symbol description] Conventional part (1st and 2nd drawings) 100~3 wavelength optical head device; 110, 230~ first laser diode source; 120, 210~ second laser diode Light source; 220~full-image laser optical element; 130~third laser diode source; _112, 122, 132, 212, 232~grating; 115, 125, 135, 215, 235, 240~ splitting mirror 140, 260~ collimating mirror; 150, 250~ mirror; 160, 270~ objective lens; 170~ disc; 180, 280~ lenticular lens; 190, 290~ photodetector integrated circuit component. 0949-A21761TW(N2);P51950073TW;jamngwo 13 200828294 Part of this case (Fig. 3, 4) 310, 410~Blu-ray laser source; 320~WD laser source; 330~CD laser source; 420~CD, DVD sharing Laser source; 312, 322, 332, 412, 422 to grating; 315, 325, 415 to spectroscopy; 350, 450 to objective lens system; 340, 440 to first plate beam splitter; • 345, 445 to second Flat beam splitter; 370, 470~ disc; 380, 480~ plano-concave lens; 390, 490~ first photodetector integrated circuit component; 385, 485~ second photodetector integrated circuit component.
0949-A21761TW(N2)；P51950073TW；]amngwo 140949-A21761TW(N2); P51950073TW;]amngwo 14