1286539 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種玻璃元件的製造方法，特別是指 一種光學玻璃元件（glass optical elements)的製造方 法0 【先前技術】 參閱圖1，以下簡單說明一種習知光學玻璃元件之製造 方法。1286539 IX. The invention relates to a method for manufacturing a glass element, and more particularly to a method for manufacturing a glass optical element. [Prior Art] Referring to FIG. 1, the following A method of manufacturing a conventional optical glass element will be briefly described.
首先，進行步驟S11，以一玻璃預形體於一玻璃模造 (molding)前之折射率（refractive index，簡稱 nd 值）及 散色度[dispersion，一般以艾伯數值（Abbe-number)表示 之，簡稱vd值]為一設計基準並決定一光學玻璃元件之設 計條件。 進一步地’進行步驟S12，對該玻璃預形體施予玻璃模 造製程以形成一玻璃成形體。 接著’進行步驟S13，對該玻璃成形體施予回火製程 (annealing process)致使該玻璃成形體之光學性質恢復至 玻璃模造製程前的折射值及散色度。 最後’進行步驟S14，依該光學玻璃元件之設計條件對 該玻璃成形體施予一後加工處理以製得一光學玻璃元件。 一般而言’當一光學玻璃材質經過加熱達軟化點（soft point)之後其光學性質將嚴重地受到其冷卻速率的影響。 不同的光學玻璃材料本身自略高於玻璃轉化點的模造 (molding)r%溫環境冷卻到其玻璃轉化點之後，皆需依照其 I286539 各自的一標準冷卻速度（standard cool ing rate，以下簡 稱n)降溫才可取得相同於未實施高溫玻璃模造前的光學特 性。First, step S11 is performed to represent a refractive index (refractive index, nd value) and a dispersion (dispersion) of a glass preform before a glass molding, generally expressed as an Abbe-number. The abbreviation vd value] is a design basis and determines the design conditions of an optical glass component. Further, in step S12, the glass preform is subjected to a glass molding process to form a glass formed body. Next, in step S13, the glass forming body is subjected to an annealing process to restore the optical properties of the glass formed body to the refractive index and the degree of chromaticity before the glass molding process. Finally, step S14 is performed to apply a post-processing to the glass formed body in accordance with the design conditions of the optical glass member to obtain an optical glass member. In general, when an optical glass material is heated to a soft point, its optical properties will be severely affected by its cooling rate. Different optical glass materials themselves are cooled to their glass transition points from a molding environment that is slightly higher than the glass transition point. The standard cooling rate (hereinafter referred to as n) is required according to the I286539. The temperature characteristics before the high temperature glass molding are not achieved can be obtained by cooling.
舉例來說，當一光學玻璃的一特定冷卻速度（以下簡稱 η)大於其η時，則由於η較大致使高溫環境下原子排列鬆 政的光學玻璃於冷卻後所得的體積大於原始的體積，因此 ，冷卻後的光學玻璃之nd值將相對地降低且其vd值亦可 能增加或減少，此外，當n越大時，則最終所取得的nd值 及vd值與原始的光學性質差異越大。另，值得一提的是， nd值的降低程度亦是依玻璃材料本身組成而異，一般是介 於-1 X 10 3〜-6 X 1〇_3之間；而vd值的變化幅度則較小 ，且其數值可能變大或變小，一般約在± 2 %以内。 而由前揭圖1所述的光學玻璃元件之製造方法可知， 在光學玻璃元件的製作流程中，一般是以該玻璃預形體在 高溫玻璃模造前的原始光學特性為基礎來決定其最終被製 作成光學玻璃元件的設計條件。然而，基於玻璃模造模仁 (molding core)於模造製程參數的限制，致使該玻璃預形 體經玻璃模造軟化塑形之後的冷卻速度無法依照其本身η 的條件降溫，僅能以條件大於其ri的降溫。因此，經高 溫玻璃模造後的玻璃成形體需再進一步地被施予回火製程 ’才可利用其所決定的光學玻璃元件之設計條件對該玻璃 成形體實施後續的光學鍍膜等加工製程。 此處步驟S13的回火製程，首先是經由對該玻璃成形 體加熱達回火點（anneal ing p〇int)並持溫一特定時間藉以 6 1286539 釋放殘留於該玻璃成形體内的熱應力（thermal stress)， 並以一特定的冷卻速度持續降溫達低於其應變點（strain point)的溫度以使該玻璃成形體的光學特性恢復至其原始 的光學特性。然而，由於此種回火製程需經由熱處理爐才 能得以實施，且由升溫回火製程的持溫過程至降溫達低於 應變點所需消耗的時間約介於12〜72小時，因此，不但消 耗能源亦造成時間成本過高等問題。For example, when a specific cooling rate (hereinafter abbreviated as η) of an optical glass is greater than η, the volume obtained by cooling the optical glass of the atomic arrangement in a high temperature environment after cooling is larger than the original volume, Therefore, the nd value of the cooled optical glass will be relatively lowered and its vd value may also increase or decrease. In addition, when n is larger, the difference between the final obtained nd value and vd value and the original optical property is greater. . In addition, it is worth mentioning that the degree of reduction of the nd value varies according to the composition of the glass material itself, generally between -1 X 10 3~-6 X 1〇_3; and the variation of the vd value is It is small and its value may become larger or smaller, generally within ± 2%. According to the manufacturing method of the optical glass element described in FIG. 1 above, in the manufacturing process of the optical glass element, it is generally determined that the glass preform is finally produced based on the original optical characteristics before the high temperature glass molding. Design conditions for optical glass components. However, based on the limitation of the molding core of the glass mold, the cooling rate of the glass preform after being softened by glass molding cannot be cooled according to the condition of its own η, and only the condition is greater than its ri. Cool down. Therefore, the glass molded body which has been molded by the high-temperature glass needs to be further subjected to a tempering process. Only after the design conditions of the optical glass element determined by the glass forming body can be subjected to a subsequent optical coating process or the like. Here, the tempering process of step S13 is firstly to release the thermal stress remaining in the glass forming body by heating the glass forming body to an anneal ing p〇int and holding the temperature for a specific time by 6 1286539 ( Thermal stress), and continues to cool down to a temperature below its strain point at a specific cooling rate to restore the optical properties of the glass formed body to its original optical properties. However, since such a tempering process needs to be carried out through a heat treatment furnace, and the time required from the temperature holding process of the temperature rising tempering process to the temperature lowering than the strain point is about 12 to 72 hours, therefore, not only consumption Energy also causes problems such as excessive time and cost.
此外曰本第319 6 9 5 2專利號發明專利則揭露一種光 學玻璃7L件及其製作方法，是利用改變玻璃材料組成的方 式致使光學玻璃經玻璃模造製程後不需再施予回火製程， 而可直接獲得與原始玻璃材料相同的光學特性。然而，為 使〃光予玻璃材料能在玻璃模造後獲得與原始玻璃材料相 當之光學特性，則是必須重新調配光學玻璃材料之組成， 2此，此日本專利的缺點在於調配光學玻璃材料之組成所 而考慮的問題較為繁複，亦增加了製作方法的複雜度。 由上述可知，降低光學玻璃元件的生產成本及時間成 本一進而提升光學玻璃模造元件之生產效能並簡化光學玻 璃疋件的製造方法，已成為當前從事光學玻璃元件製造者 所待克服的難題。 【發明内容】 本發明之目的，即在提供一種光學玻璃元件的 製造方法。 :疋本發明光學玻璃元件的製造方法，包含下列步 1286539 一散色度（以下簡稱，Vdi值）；該步驟（a)與該步驟（b)之間 更包含一步驟（a，），該步驟（a，）是依序對該玻璃成形體施予 疋心（centering)製程及塗墨製程（black edge process); 該步驟（b)的後加工處理是對該玻璃成形體施予光學鍍膜製 程。前揭所謂的定芯製程，是以砥石對旋轉中的玻璃成形 體研削成正圓形的外型輪廓以利達成與其他元件（如，鏡筒 )的配合；所謂的塗黑製程，是以黑色顏料塗覆於玻璃成形 體之光學有效徑以外的區域以避免雜散光源的干擾；而所 謂的光學鍍膜製程，是視光學玻璃元件之各種應用（如，分 光鏡、可見光帶通濾光鏡、抗反射鏡等）而鍍上具有特定光 學特性的光學鍍膜，以可見光帶通濾光鏡的光學特性舉例 說明’是於全光譜領域中具有截止紫外光及遠紅外光而允 許可見光穿透的光學特性。 值得一提的是，光學玻璃元件之設計條件一般是以該 玻璃預形體之光學特性的一起始值做為設計基準，並依照 此起始值針對後續光學玻璃元件的應用予以決定其設計條 件，因此，本發明該步驟（a)中所述的『決定—光學玻璃元 件之設計條件』及『施予玻璃模造製程』兩者的先後順序 是不受限制。 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之兩個具體實施例的詳細說明中，將可 清楚的呈現。 * 〈具體實施例一〉 本發明光學玻璃元件的製造方法之一具體實施例一， 1286539 是配合參閱圖2並簡單地說明於下。 首先，進行步驟S21，以約61(TC的成形溫度對一 ncL 值及vdr值分別1. 6935及53. 2的鑭（La)系玻璃預形體予以 塑形並於塑形後以120秒的降溫時間降溫至520°C，進而製 得一 nd2 值及 vd2 值分別約為 ι.69± 50xl0-5 及 52.75± 0.4 的玻璃成形體並完成玻璃模造製程。在該具體實施例一中 ，該nd2值及vd2值分別較該nch值及vch值降低約3.5xl(T3 及 0· 45 〇In addition, the invention patent of the 319 6 9 5 2 patent discloses a 7L optical glass and a manufacturing method thereof, which are used to change the composition of the glass material, so that the optical glass does not need to be subjected to a tempering process after the glass molding process. The same optical properties as the original glass material can be obtained directly. However, in order for the glazing to give the glass material an optical characteristic comparable to that of the original glass material after the glass molding, it is necessary to reconfigure the composition of the optical glass material. 2, the disadvantage of this Japanese patent is the composition of the optical glass material. The problems considered are more complicated and increase the complexity of the production method. As can be seen from the above, reducing the production cost and time cost of the optical glass element, thereby improving the production efficiency of the optical glass molded component and simplifying the manufacturing method of the optical glass component, has become a problem to be overcome by current optical glass component manufacturers. SUMMARY OF THE INVENTION An object of the present invention is to provide a method of manufacturing an optical glass element. The manufacturing method of the optical glass element of the present invention comprises the following step 1286539: a color chromaticity (hereinafter referred to as Vdi value); and the step (a) and the step (b) further comprise a step (a), The step (a,) is to sequentially apply a centering process and a black edge process to the glass formed body; the post-processing of the step (b) is to apply an optical coating to the glass formed body. Process. The so-called centering process is based on the fact that the vermiculite is used to grind the rotating glass forming body into a rounded contour to achieve cooperation with other components (eg, the lens barrel); the so-called blackening process is black. The pigment is applied to areas other than the optical effective diameter of the glass shaped body to avoid interference from stray light sources; the so-called optical coating process is used for various applications of optical glass elements (eg, beam splitters, visible bandpass filters, An anti-reflective mirror, etc., is coated with an optical coating having specific optical characteristics, and the optical characteristics of the visible-band band-pass filter are exemplified as 'opticals that have ultraviolet light and far-infrared light in the full spectrum field and allow visible light to pass through. characteristic. It is worth mentioning that the design condition of the optical glass component is generally based on a starting value of the optical characteristics of the glass preform, and the design conditions are determined according to the initial value of the application of the subsequent optical glass component. Therefore, the order of the "decision - design conditions of the optical glass element" and the "application of the glass molding process" described in the step (a) of the present invention is not limited. The foregoing and other technical aspects, features and advantages of the present invention will be apparent from the Detailed Description of the Detailed Description. * <Embodiment 1> One embodiment of the method for producing an optical glass element of the present invention, 1286539 is referred to Fig. 2 and will be briefly described below. First, step S21 is performed, and a La (La) glass preform having an ncL value and a vdr value of 1. 6935 and 51.2, respectively, is shaped at a forming temperature of TC of about 61 and is shaped by 120 seconds after shaping. The cooling time is lowered to 520 ° C, and a glass molded body having a nd2 value and a vd2 value of about ι.69±50xl0-5 and 52.75±0.4, respectively, is obtained and the glass molding process is completed. In the first embodiment, the The nd2 value and the vd2 value are reduced by about 3.5xl (T3 and 0·45 较), respectively, compared with the nch value and the vch value.
進一步地，進行步驟S22，該玻璃成形體於不需實施回 火製程的條件下，可直接地依該玻璃預形體於玻璃模造後 之光學特性（即，該nd2值及Vd2值）做為該具體實施例一之 光學玻璃元件的設計基準，並決定出一該具體實施例一之 光學玻璃元件的設計條件。 接著，進行步驟S23，依序對該玻璃成形體施予定芯製 程及塗墨製程。最後，進行步驟S24，依該具體實施例一之 光學玻璃元件的設計條件對該玻璃成形體施予一光學鍍膜 製程以製得一光學玻璃元件。 〈具體實施例二〉 本發明光學玻璃元件的製造方法之一具體實施例二大 致上是與該具體實施例一相同，丨;^同處僅在&該具體實 施例二之玻璃預形體的ndl值及vdl值分別為1 68893及 31.1;該具體實施例二之破璃模造製程的成形溫度約為57〇 °c，且塑形後的降溫條件是以90秒自57〇t降溫至48〇t ，其最終玻璃成形體所獲得之nrU枯R , 役侍之Μ2值及值分別約為Further, in step S22, the glass formed body can directly depend on the optical characteristics (ie, the nd2 value and the Vd2 value) of the glass preform after glass molding without performing a tempering process. The design basis of the optical glass element of the first embodiment is determined, and the design conditions of the optical glass element of the specific embodiment 1 are determined. Next, in step S23, the glass forming body is sequentially subjected to a core process and an ink application process. Finally, step S24 is performed to apply an optical coating process to the glass formed body to obtain an optical glass element according to the design conditions of the optical glass element of the first embodiment. <Embodiment 2> One embodiment of the method for manufacturing an optical glass element of the present invention is substantially the same as that of the specific embodiment 1, and is the same as the glass preform of the second embodiment. The ndl value and the vdl value are respectively 1 68893 and 31.1; the forming temperature of the glass molding process of the second embodiment is about 57 〇 ° C, and the cooling condition after shaping is from 90 〇 t to 90 in 90 seconds. 〇t , the nrU of the final glass formed body is obtained, and the values and values of the servants are approximately
10 1286539 【主要元件符號說明】 無10 1286539 [Description of main component symbols]