200416718 五、發明說明（1) 發明所屬之技術領域】 本發明係有關於一種光 尤指一種不需將徑向及切殊機光讀寫頭工作取角的方法 線方向之傾角分別歸零，即可 ^值及最佳傾角者 計算出光讀寫頭之最小j i 11 【先前技術】 按，光碟機之光讀寫頭 尺寸及紐裝上的誤差，俾1 ^ a於裝造過程中，常因零件 Optical path)不垂直於=、δ亥光項寫頭1 a之光路（ (如第一圖所示）；因此土，平面2 a ，而形成一傾角Θ 造廠則需分別針對徑向在習知技術中，光讀寫頭之製 方向，進行量測置抖2 j 3lal)及切線（tangential) 從中計算出哕光二(Jltter值）與傾角之關係，且 ^出該先項寫頭1 a於徑向與切線方向之最佳傾角 ，§ 之’ Jltter 值及其極限值在 CD_R〇M& DVI) ( Digi — ^ VUe〇 Disc )業界所公佈的標準規範中都有明白的指 =，Jitter值主要有兩個發生現象：一是來自量測介於資 料及時脈間的時間差（T1*T2)，其計算方法在CD_R〇M播 放器中Jitter = Tl-T2，而在DVD播放器中Jitter=(Tl-T2)/T1 (如第二圖所示），另一是量測脈寬（或Μ 0的脈 波週期量測），此脈波寬度的量測主要是用來評估光碟儲 存媒體；藉此，從既有之經驗公式來看，J i 11 e r值與傾角 具有以下的關係：Jitter(x) = ax2 + bx + c 及 Jitter(y)=ay2 + by + c ’其中X代表徑向之傾角，y代表切線方向之傾角，a 、b和c代表未知常數；當計算J i 11 er (X)時，切線方向之 傾角需先作歸零動作，而三次量得徑向之傾角，當計算200416718 V. Description of the invention (1) The technical field to which the invention belongs] The present invention relates to a kind of light, especially a method that does not need to reset the radial and inclination angles of the working angles of the optical read-write heads of the Chesh machine. That is, the minimum value of the optical read-write head can be calculated by the value of ^ and the best inclination angle. [Previous technology] Press, the size of the optical read-write head of the optical disc drive and the error on the button, 俾 1 ^ a During the manufacturing process, often Because the optical path of the component is not perpendicular to the light path of the write head 1 a of the delta light term (as shown in the first figure); therefore, the soil and the plane 2 a form an inclination Θ. In the conventional technology, the direction of the optical read-write head is measured, and the measured jitter 2 j 3lal) and the tangential are used to calculate the relationship between the Jltter value and the inclination angle, and ^ the first write head 1 a The best inclination angle in the radial and tangential directions. The 'Jltter value and its limit value of § are clearly indicated in the standard specifications published by the industry CD_R0M & DVI) (Digi — ^ VUe〇Disc) = There are two main occurrences of Jitter values: One is that the measurement is between the data and the clock. Time difference (T1 * T2), the calculation method is Jitter = Tl-T2 in CD_ROM player, and Jitter = (Tl-T2) / T1 in DVD player (as shown in the second figure), and The first is to measure the pulse width (or the pulse period measurement of M 0). This pulse width measurement is mainly used to evaluate the optical disc storage medium. Based on the existing empirical formula, J i 11 er The value has the following relationship with the inclination angle: Jitter (x) = ax2 + bx + c and Jitter (y) = ay2 + by + c 'where X is the inclination angle in the radial direction, y is the inclination angle in the tangential direction, a, b, and c Represents an unknown constant; when calculating Ji 11 er (X), the inclination in the tangential direction needs to be reset to zero first, and the inclination in the radial direction is calculated three times.
第4頁 200416718 五、發明說明（2) Jitter(y)， 切線方向之 據此， 兩曲線方程 三點即可決 的最低點（ 值），進而 切線方向之 量測某一方 零動 頭工 和不 來從 研究 上述 【發 取角 降為 可快 作者。 綜上所 作取角 必要之 是以， 事此方 並配合 缺失之 明内容 本發明 的方法 五點， 速地計 則徑向之傾角需先作歸零動作，而三次量得 傾角。 由 Jitter(x) = ax2 + bx + c 及 Jitter(y)二 ay2 + by + c 式可知，在單一方向（徑向或切線方向）量測 定該方向之曲線方程式，且求得該方向之曲線 如第三圖及第四圖所示，即可得最小之J i tter 得到該方向之最佳傾角，因此若要完成徑向與 最佳傾角的計算，則需至少量測六個點，且當 向之傾角時，即必須先將另一方向之傾角作歸 述，請參閱第五圖所示，係習知光碟機光讀寫 的方法，惟由圖中可知該方法需耗費許多時間 量測動作者。 本發明人有感上述缺失之可改善，且依據多年 面之相關經驗，悉心觀察且研究之，乃特潛心 學理之運用，而提出一種設計合理且有效改善 本發明。 ] 之主要目的，係提供一種光碟機光讀寫頭工作 ，其利用二次曲面之經驗公式，而令量測數量 且不需將徑向及切線方向之傾角分別歸零，即 算出該光讀寫頭之最小Jitter值及最佳傾角者 為了達成上述目的，本發明係提供一種光碟機光讀寫Page 4 200416718 V. Description of the invention (2) Jitter (y), according to the tangent direction, the lowest point (value) that can be determined by three points of the two curve equations, and then the tangent direction is measured on one side with zero movement and no Come to study from the above [delivery angle to fast author. To sum up the angle taken, it is necessary to do this and cooperate with the lack of clear content. The method of the present invention has five points. For a speedometer, the radial inclination needs to be reset to zero first, and the inclination is measured three times. From the formulas of Jitter (x) = ax2 + bx + c and Jitter (y) two ay2 + by + c, we can know that the curve equation in that direction is measured in a single direction (radial or tangential direction), and the curve in that direction is obtained. As shown in the third and fourth figures, the smallest J i tter can be obtained to obtain the optimal tilt angle in this direction. Therefore, to complete the calculation of the radial and optimal tilt angle, you need to measure at least six points, and When tilting to the angle, you must first summarize the tilt in the other direction. Please refer to the fifth figure, which is a method of reading and writing optical disc drives. However, it can be seen from the figure that this method takes a lot of time Measure actor. The inventor feels that the above-mentioned deficiency can be improved, and based on years of relevant experience, he has carefully observed and researched it, which is an application of special scientific theory, and proposes a reasonable design and effective improvement of the present invention. ] The main purpose is to provide an optical disk drive optical read-write head work, which uses the empirical formula of the quadric surface, so that the measured quantity can be calculated without the need to reset the inclination angles in the radial and tangential directions to zero. For the minimum Jitter value and the best tilt angle of the write head, in order to achieve the above purpose, the present invention provides an optical disc drive for optical reading and writing.
第5頁 200416718 五、發明說明（3) 頭工作取角的方法，其應用於光讀寫頭之抖動檢測裝置， 該裝置係包括有治具，用以模擬調整該光讀寫頭之傾角， 以及設置於該治具上之抖動儀，該抖動儀係可檢測該光讀 寫頭於不同傾角之抖動值；該方法係包括下列步驟：利用 二次曲面之經驗公式Z = ax2 + by2 + cx + dy + e，並配合該抖動檢 測裝置進行量測；任意量測五點，而得到五組光讀取頭之 傾角（xl， yl)、（x2， y2)、（x3， y3)、（x4， y4)和（x5，y5 );列出該五組傾角及相對應之Ji tter值（Z1、Z2、Z3、 Z4和Z5 )的聯立方程式組；解該聯立方程式組，以求得al 、bl、cl、dl 和 el ;得到曲面方程式為 Z = alx2 + bly2 + clx + dly + el;計算該曲面方程式，而求得該光讀寫頭之最小 Jitter值及最佳傾角；以及將該最小之Jitter值的資料輸 入一條碼中，俾作為調整光讀寫頭之工作傾角的依據。 為了使貴審查委員能更進一步瞭解本發明為達成預定 目的所採取之技術、手段及功效，請參閱以下有關本發明 之詳細說明與附圖，相信本發明之目的、特徵與特點，當 可由此得一深入且具體之瞭解，然而所附圖式僅提供參考 與說明用，並非用來對本發明加以限制者。 【實施方法】 請參閱第六圖所示，係本發明用於光讀寫頭之抖動檢測裝 置之示意圖，其包括有一治具2 0 ，係用以模擬調整該光 讀寫頭1之傾角（如第六圖中之0)，以及一抖動儀2 1 ，係設置於該治具2 0上，且該抖動儀2 1係可檢測該光 讀寫頭1於不同傾角之抖動值；請參閱第七圖所示，係該Page 5 200416718 V. Description of the invention (3) The method of head angle measurement is applied to the jitter detection device of the optical read-write head. The device includes a fixture to simulate and adjust the inclination of the optical read-write head. And a jitter meter set on the jig, the jitter meter can detect the jitter value of the optical read-write head at different inclination angles; the method includes the following steps: the empirical formula using a quadric surface Z = ax2 + by2 + cx + dy + e, and measure with the shake detection device; measure five points arbitrarily, and get the tilt angles (xl, yl), (x2, y2), (x3, y3), ( x4, y4) and (x5, y5); list the five groups of simultaneous inclination angles and corresponding Ji tter values (Z1, Z2, Z3, Z4, and Z5); solve the simultaneous equations to find Obtain al, bl, cl, dl, and el; get the surface equation as Z = alx2 + bly2 + clx + dly + el; calculate the surface equation, and find the minimum Jitter value and optimal tilt angle of the optical read-write head; and Enter the data of the smallest Jitter value into a bar code, and use it as the basis for adjusting the working tilt of the optical headIn order for your reviewers to further understand the technology, means and effects adopted by the present invention to achieve the intended purpose, please refer to the following detailed description of the present invention and the accompanying drawings. It is believed that the object, features and characteristics of the present invention can be derived from this. A thorough and specific understanding is obtained, however, the drawings are provided for reference and description only, and are not intended to limit the present invention. [Implementation method] Please refer to the sixth figure, which is a schematic diagram of the jitter detection device for an optical read / write head according to the present invention, which includes a jig 20 for simulating and adjusting the inclination angle of the optical read / write head 1 ( (Such as 0 in the sixth figure), and a dither meter 21 is set on the jig 20, and the dither meter 21 can detect the jitter value of the optical read-write head 1 at different inclination angles; see As shown in the seventh figure,
200416718 五、發明說明（4) ------ d機/讀寫頭工作取角的方法，其包括下列步驟： (供一曲面方程式Z = axHby2+cx + dy + e，其中X為徑向傾 角，y為切線方向傾角，z為jitter(x, y)值，以及a、 b、c、d和e為未知常數。 (2) 2意調整該治具角度五次，而得到五組光讀取頭之傾 角 U1， yl)、（x2， y2)、（x3， y3)、（X4， y4)和（χ5, y 5) ’並同時利用該抖動儀分別量測出相對於該五組 傾角之 Ji tter 值（Zl、Z2、Z3、Z4 和 Z5)。 (3) 分別列出該五組傾角及相對應Jitter值之聯立方程式 組，而得到一矩陣方程式，如下所示： f a· Γ2.Ί ^ A ^ l b xl A ^ l c == 2, d K % Λ 1 d /s J>s 1, Λ. (4) 解該矩降方程式’以求得&1、1)1、（：1、（11和61為已知 常數。 (5) 將該已知常數al、bl、cl、dl和el代回該曲線方程式 Z = ax2 + by2 + cx + dy + e 中（即 a = ai 、b = bl 、c = cl 、d = dl 和 e = el) ’而得到該曲面方程式為Z = alx2 + bly2 + clx + dly + e 1 0 、 (β)利用該曲面方程式Z = alx2 + bly2 + clx + dly + el，以得到其· 二次曲面之最低點’亦即最小J i 11e r值’此最低點就 是徑向及切線方向之最佳傾角（如第八圖所示）。200416718 V. Description of the invention (4) ------ The method of taking angle for d machine / reading head work, including the following steps: (for a curved surface equation Z = axHby2 + cx + dy + e, where X is the diameter Tilt angle, y is the tangential tilt angle, z is the jitter (x, y) value, and a, b, c, d, and e are unknown constants. (2) 2Intentionally adjust the fixture angle five times to get five groups The tilt angles U1, yl), (x2, y2), (x3, y3), (X4, y4), and (χ5, y 5) 'of the optical pickup head and simultaneously measure the relative Ji tter values of the group inclination (Zl, Z2, Z3, Z4, and Z5). (3) List the five sets of inclination angles and the corresponding simultaneous equations of the Jitter value to obtain a matrix equation, as shown below: fa · Γ2.Ί ^ A ^ lb xl A ^ lc == 2, d K % Λ 1 d / s J > s 1, Λ. (4) Solve the moment drop equation 'to find & 1, 1) 1, (: 1, (11 and 61 are known constants. (5) will be The known constants al, bl, cl, dl, and el are substituted into the curve equation Z = ax2 + by2 + cx + dy + e (that is, a = ai, b = bl, c = cl, d = dl and e = el) 'and the surface equation is Z = alx2 + bly2 + clx + dly + e 1 0, (β) Use the surface equation Z = alx2 + bly2 + clx + dly + el to obtain its quadratic surface The lowest point is the minimum Ji 11e r value. This lowest point is the best inclination angle in the radial and tangential directions (as shown in Figure 8).
第7頁 200416718 五、發明說明（5) (7)將該最小Jitter值資料輸入一條碼中，以作為調整光 讀寫頭之工作傾角的依據。 綜上所述，本發明實為一種利用二次曲面之經驗公式 ，而可令量測數量降為五點，俾使光讀寫頭之生產效率提 昇1 7 %，且不需將徑向及切線方向之傾角分別歸零，即可 快速地計算出該光讀寫頭之最小J i tter值及最佳傾角；且 利用上述聯立方程式組而使Z1=Z2 = Z3 = Z4 = Z5，並設定 Jitter值的上限，便可求得各光路曲面方程式的交集，此 交集就是各光路系統皆可以正常寫入、讀取的區域。 惟，以上所述，僅為本發明最佳之一的具體實施例之 詳細說明與圖式，惟本發明之特徵並不侷限於此，並非用 以限制本發明，本發明之所有範圍應以下述之申請專利範 圍為準，凡合於本發明申請專利範圍之精神與其類似變化 之實施例，皆應包含於本發明之範疇中，任何熟悉該項技 藝者在本發明之領域内，可輕易思及之變化或修飾皆可涵 蓋在以下本案之專利範圍。Page 7 200416718 V. Description of the invention (5) (7) Enter the minimum Jitter value data into a code as the basis for adjusting the working tilt of the optical read / write head. In summary, the present invention is an empirical formula using a quadric surface, and the number of measurements can be reduced to five points, which can increase the production efficiency of the optical read / write head by 17%. The inclination angles of the tangential direction are respectively reset to zero, and the minimum J i tter value and the optimal inclination angle of the optical read-write head can be quickly calculated; and the above simultaneous equations are used to make Z1 = Z2 = Z3 = Z4 = Z5, and By setting the upper limit of the Jitter value, the intersection of the light path surface equations can be obtained. This intersection is the area where each optical path system can normally write and read. However, the above descriptions are only detailed descriptions and drawings of one of the best specific embodiments of the present invention, but the features of the present invention are not limited thereto, and are not intended to limit the present invention. The full scope of the present invention should be as follows The scope of the patent application mentioned above shall prevail. Any embodiment that is in line with the spirit of the patent application scope of the present invention and similar changes shall be included in the scope of the present invention. Anyone skilled in the art can easily make changes in the field of the present invention. The changes or modifications considered can be covered by the patent scope of the following case.
第8頁 200416718 圖式簡單說明 · 【圖式簡單說明】 第一圖：係習知光讀寫頭之光路不垂直於基準平面之示意 圖。 第二圖：係習知產生抖動現象之示意圖。 第三圖：係習知徑向傾角之二次曲線之座標圖。 第四圖：係習知切線方向傾角之二次曲線之座標圖。 第五圖：係習知光碟機光讀寫頭工作取角的方法之流程圖 〇 第六圖：係本發明用於光讀寫頭之抖動檢測裝置之示意圖 〇 第七圖：係本發明光碟機光讀寫頭工作取角的方法之流程 圖。 第八圖：係本發明徑向及切線方向之二次曲面之座標圖。 【元件符號說明】 光讀寫頭 1 抖動檢測裝置 2 治具 2 0 抖動儀 2 1Page 8 200416718 Simple illustration of the drawing. [Simplified illustration of the drawing] The first picture: It is a schematic diagram that the optical path of the conventional optical read-write head is not perpendicular to the reference plane. The second picture is a schematic diagram of the conventional phenomenon of jitter. The third figure: the coordinate diagram of the quadratic curve of the conventional radial inclination. Figure 4: Coordinate plot of the quadratic curve of the tangent direction inclination. Fig. 5 is a flowchart of a conventional method for determining the angle of the optical read-write head of an optical disc drive. Fig. 6 is a schematic diagram of the jitter detection device of the present invention for an optical read-write head. Fig. 7 is an optical disc of the present invention. Flowchart of the method of working optical angle of the optical pickup head. Figure 8: Coordinate diagram of the quadric surface in the radial and tangential directions of the present invention. [Description of component symbols] Optical read / write head 1 Jitter detection device 2 Fixture 2 0 Jitter meter 2 1
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