201204671 六、發明說明： 【發明所屬之技術領域】 本發明係與光學玻璃有關，更詳而言之是指一種 高折射、低色散（色差小）光學玻璃，其折射率（nd) 在1.64至1.73之範圍内及阿貝數（vd)在32 2至46 7 之範圍内之光學玻璃者。 【先前技術】 按，光學玻璃的兩個重要參數是折射率和阿貝數 1又稱色散指數），阿貝數是用來衡量介f的光線色黄 知度’阿貝數越小光線色散程度越大，反之，阿貝數 越大則光線色散程度越小，亦即色差越小。習知高新 射率之光學玻璃係以大f含有氧化錯之組成系為代 表由於玻璃之穩疋性佳、且玻璃轉移點㈤低，因 此被作為精㈣壓成形用使用，如日本特開平 專利揭示有大量含有氧化敍之精密‘壓评 :先學玻璃。然而，由於實施精密模壓成形時之環境 ^了，金屬模具之氧化，被保持於還原性氣氛，因 中含有氣化錯時，會有由玻璃表面新 著於金屬模具表面，無法維持金屬 模具之精社、面之問題。 卜 無鉛化。 ，虱化鉛對環境有害，期望 為解決前述問題，离 W折射率且不含氣化金4 | 成形用光學玻璃被大量 α $餐’幾乎係以磷酸鹽為; 3 201204671 之體糸。例如，曰士姑日日η Λ 〇 日本特開2003-321 245號、特開孚 8-157231 號、牿 9Ληο ΟΛ 』卞 寺開2003-300751號及中華民國發明第 1305525號等專利娇-^ ^ . 寻寻利所不’幾乎皆含有P2〇5、_5及201204671 VI. Description of the Invention: [Technical Field] The present invention relates to optical glass, and more particularly to a high refractive, low dispersion (small color difference) optical glass having a refractive index (nd) of 1.64 to Optical glass in the range of 1.73 and Abbe number (vd) in the range of 32 2 to 46 7 . [Prior Art] Press, the two important parameters of optical glass are refractive index and Abbe number 1 also known as dispersion index. The Abbe number is used to measure the light yellowness of the medium f. The smaller the Abbe number, the more the ray dispersion is. Large, on the other hand, the larger the Abbe number, the smaller the degree of chromatic dispersion, that is, the smaller the chromatic aberration. The optical glass of the conventional high-intensity radiance is represented by the composition of the large f-containing oxidization error, because the glass has good stability and the glass transition point (5) is low, so it is used as a fine (four) pressure forming, such as the Japanese special patent. Revealing a large number of precision containing oxidation theory's pressure: first learn glass. However, due to the environment in which the precision molding is performed, the oxidation of the metal mold is maintained in a reducing atmosphere. When the gasification is contained, the surface of the glass is newly formed on the surface of the metal mold, and the precision of the metal mold cannot be maintained. Social and facial issues. Bu lead-free. Lead antimony is harmful to the environment, and it is expected that in order to solve the above problems, the refractive index from W and the absence of vaporized gold 4 | The optical glass for forming is a large amount of α $ meal 'almost phosphate; 3 201204671. For example, 曰 姑 日 η η 〇 特 Japan Special Open 2003-321 245, Special Kaifu 8-157231, 牿9Ληο 卞 卞 卞 开 2003 2003-300751 and the Republic of China invention No. 1305552 ^ . Searching for the benefits does not almost always contain P2〇5, _5 and
LnOj 10或[ο成分。不過，罐酸鹽系光學玻璃雖 可解決含有氧化錯成份之光學玻璃製作時無法維持金 屬模具，密面之問題，但阿貝數較低，亦即，色差較 大，換言之，光學品質仍有待提升。 【發明内容】 本發明之主要目的即在提供一種可解決前揭缺失 之光學玻璃，其折射率在1.56至1.73之範圍内，且， 阿貝數在32. 2至46. 7之範圍内，其折射率不低、阿 貝數較習知磷酸鹽系光學玻璃更高，俾具 學品質者。 尤 緣是，為達成前述之目的，本發明係提供—種光學 玻璃：以氧化物基準之莫耳％，包含有3〇〜4〇m〇i% 之五氧化二磷：7. 5〜20%之五氧化二鈮：及4〇〜52. 5 之氧化鋰’其折射率在164至173之範圍内及 阿貝數在32.2至46.7之範圍内。 進一步地，氧化锶之一部分或全部以鹼金屬氧化 物取代。· · 進一步地’鹼金屬氧化物係氧化鋰。 進步地，氧化銘之組成範圍為< 4 〇 10 mol% ，五氧化二銳之組成範圍為五氧化 201204671 二磷之組成範圍為40 mol%。 進一步地，氧化鋰之組成範圍為1〇〜4〇m〇l%， 氧化勰之組成範圍為<40〜1〇 m〇1%，五氧化二鈮之 組成範圍為15%，五氧化二4之組成範圍為35 —%。 進一步地，氧化鋰之組成範圍為10〜4〇m〇l%， 氧化鋰之組成範圍為<30〜1〇 m〇1%，五氧化二鈮之 組成粑圍為30%，五氧化二磷之組成範圍為3〇 m〇1%。 進一步地，五氧化二磷之莫耳百分率為4〇m〇1%、 五氧化一鈮之莫耳百分率為7.5 mol%、氧化勰之莫耳 百分率為52. 5mol%，阿貝數係46. 72。 【實施方式】 以下’茲舉本發明數較佳實施例，並配合圖式做 進·—步之詳細說明如後： · 本發明一較佳實施例之光學玻璃（锶鈮磷酸鹽玻 璃）’主要由五氧化二磷（P2〇s)、五氧化二鈮（Nb2〇5) 及氧化銷（SrO )等成分所組成，而各該組成成分之莫 耳百分率如下： 五氧化二填 .30 〜60% 五氧化二銳 0〜 25°/〇 氧化銷 30' 〜50 mol% 201204671 五氧化二磷為玻璃成形劑，做為玻璃主體成份， 可賦予玻璃高色散特徵及高透光率之成分，虚石夕酸趟 玻璃及爛酸鹽玻璃比較’五氧化二鱗可賦予玻璃極： 溶解性質及抗失透性，尤其是壓製時之抗失透性及極 佳透光率。 五氧化二鈮為玻璃中間劑，乃屬於為獲得高折射 率、高分散玻璃上所必需的成分，不過，含量過高時 會導致轉移溫度（Tg)上升。 氧化锶為玻璃修飾劑，會輕微提高折射率，不過， 含量過低時玻璃無法熔融。 製作本發明光學玻璃時，係依前揭組成成分將原 料調配與混合，再將混合均勻之粉末裝填於一坩堝 中，再置入一爐中以約100(rc以上之溫度（視玻璃組 成而定）恆溫持溫適當時間，使各成份可完全熔融並達 均質化。然後將熔融之玻璃液傾倒於一模具上成型， 再冷卻至室溫而得。 藉此’本發明該光學玻璃之玻璃特性，可由各實 施例明示： . 如表一之實例1(Εχ·ΐ)〜實例6(Ex.6)所示，本發 明光學玻璃之五氧化二碟含量依序為4〇、40、40、40、 40、35及30%;五氧化二銳之含量依序為7.5、1〇、 201204671 15、20、15、20及30% ;氧化锶之含量依序為52. 5、 50、45、40、50及50%。由表一可知，本發明光學玻 璃之折射率可達1.73，而阿貝數可達46.7，較一般光 學玻璃之阿貝數更高，光線之色散程度更小。 表一LnOj 10 or [ο component. However, the can acid-based optical glass can solve the problem that the optical glass containing the oxidized component cannot maintain the metal mold and the dense surface, but the Abbe number is low, that is, the color difference is large, in other words, the optical quality remains to be determined. Upgrade. The present invention is to provide an optical glass having a refractive index in the range of 1.56 to 1.73, and an Abbe number in the range of 32. 2 to 46.7. The refractive index is not low, and the Abbe number is higher than that of the conventional phosphate-based optical glass. In the present invention, the present invention provides an optical glass: a mole % based on an oxide, comprising 3 〇 4 4 〇 〇 % % 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 The bismuth pentoxide: and the ruthenium oxide of 4 〇 to 52.5 have a refractive index in the range of 164 to 173 and an Abbe number in the range of 32.2 to 46.7. Further, part or all of the cerium oxide is substituted with an alkali metal oxide. · Further 'alkali metal oxide type lithium oxide. Progressively, the composition range of Oxidation is < 4 〇 10 mol%, and the composition range of pentoxide is pentoxide 201204671 The composition of diphosphorus is 40 mol%. Further, the composition range of lithium oxide is 1〇~4〇m〇l%, the composition range of cerium oxide is <40~1〇m〇1%, and the composition range of bismuth pentoxide is 15%, pentoxide The composition range of 4 is 35 -%. Further, the composition range of lithium oxide is 10 to 4 〇m〇l%, the composition range of lithium oxide is <30 〜1 〇 m 〇 1%, and the composition of bismuth pentoxide is 30%, pentoxide The composition of phosphorus ranges from 3〇m〇1%. Further, the molar percentage of phosphorus pentoxide is 4〇m〇1%, the percentage of moles of pentoxide is 7.5 mol%, the percentage of moles of cerium oxide is 52.5 mol%, and the Abbe number is 46. 72. [Embodiment] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The following is a description of the preferred embodiment of the present invention: Optical glass (germanium phosphate glass) of a preferred embodiment of the present invention It is mainly composed of phosphorus pentoxide (P2〇s), bismuth pentoxide (Nb2〇5) and oxidized pin (SrO). The molar percentage of each component is as follows: pentoxide oxide. 30 〜 60% pentoxide 2 0 25 ° / 〇 oxidized pin 30' ~ 50 mol% 201204671 pentoxide is a glass forming agent, as a glass main component, can impart high dispersion characteristics and high transmittance of glass. Compared with the sulphuric acid glass and the rotten acid glass, the pentoxide oxide scale can impart the glass pole: solubility and anti-devitrification, especially anti-devitrification and excellent light transmittance when pressed. Bismuth pentoxide is a glass intermediate which is a necessary component for obtaining a high refractive index and high dispersion glass. However, when the content is too high, the transition temperature (Tg) is increased. Cerium oxide is a glass modifier that slightly increases the refractive index, but the glass does not melt when the content is too low. When the optical glass of the present invention is produced, the raw materials are prepared and mixed according to the composition, and the uniformly mixed powder is loaded into a crucible, and then placed in a furnace to have a temperature of about 100 (depending on the glass composition). The temperature is held at a constant temperature for a suitable time so that the components can be completely melted and homogenized. Then, the molten glass liquid is poured onto a mold and molded, and then cooled to room temperature. Thus, the glass of the optical glass of the present invention is obtained. The characteristics can be clearly illustrated by the respective embodiments: As shown in Example 1 (Εχ·ΐ) to Example 6 (Ex. 6) of Table 1, the content of the bismuth oxide of the optical glass of the present invention is 4〇, 40, 40 in order. 40, 40, 35, and 30%; the content of pentoxide is 7.5, 1 〇, 201204671 15, 20, 15, 20, and 30%; the content of cerium oxide is 52.5, 50, 45. 40, 50 and 50%. As can be seen from Table 1, the refractive index of the optical glass of the present invention can reach 1.73, and the Abbe number can reach 46.7, which is higher than the Abbe number of the general optical glass, and the degree of dispersion of the light is smaller. Table I
Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Composition P2〇5 40 40 40 40 35 30 NbaOs 7.5 10 15 20 15 20 Sr〇 52.5 50 45 40 50 50 Li2〇 0 0 0 0 0 0 NaiO 0 0 0 0 0 〇 ♦ K2O 0 0 0 0 0 0 Charcteristic Values • nd 1.6465 1.6618 1.6957 1.7323 1.71393 1.72657 vd 46.72 42.76 37.01 32.23 36.48 36.85 Tg/°C 595.45 616.37 629.81 647.59 654.76 684.08 P 3.5428 3.5491 3.5566 3.5820 3.7184 3.6854 不過，該光學玻璃之轉移溫度（Tg )較高，若以 氧化鋰（Li2〇)部份取代成分中之氧化锶，其他成分 201204671 比例固定，如表二之實例7(Ex. 7)〜實例10(Ex. 10)所 示，氧化鋰之含量依序為10、20、30及40%，而氧化 锶之含量依序為40、30、20及1 0%，可有效降低轉移 溫度並避免折射率大幅下降。 表二Example 1 Example 2 Example 3 Example 4 Example 5 Composition 6 Composition P2〇5 40 40 40 40 35 30 NbaOs 7.5 10 15 20 15 20 Sr〇52.5 50 45 40 50 50 Li2〇0 0 0 0 0 0 NaiO 0 0 0 0 0 〇♦ K2O 0 0 0 0 0 0 Charcteristic Values • nd 1.6465 1.6618 1.6957 1.7323 1.71393 1.72657 vd 46.72 42.76 37.01 32.23 36.48 36.85 Tg/°C 595.45 616.37 629.81 647.59 654.76 684.08 P 3.5428 3.5491 3.5566 3.5820 3.7184 3.6854 However, the optical glass The transfer temperature (Tg) is relatively high. If the ruthenium oxide in the component is partially replaced by lithium oxide (Li2〇), the ratio of other components 201204671 is fixed, as shown in Example 7 (Ex. 7) to Example 10 (Ex. 10) of Table 2. As shown, the content of lithium oxide is 10, 20, 30, and 40%, and the content of yttrium oxide is 40, 30, 20, and 10%, which can effectively lower the transfer temperature and avoid a large drop in refractive index. Table II
Example 7 Example 8 Example 9 Example 10 Composition P2O5 40 40 40 40 Nb2〇5 10 10 10 10 Sr〇 40 30 20 10 L12O 10 20 30 40 Na2〇 0 0 0 0 K2O 0 0 0 0 Charcteristic Values nd 1.6591 1.6537 1.6453 1.6369 Tg/°C 500 451 409 411 P 3.432 3.298 3.114 2.921 此外，如表三之實例ll(Ex.ll)〜實例14(Ex. 14) 所示，固定氧化鋰與氧化锶之含量，同時提升五氧化 二鈮之含量至1 5%，並降低五氧化二磷之含量至35°/〇， 201204671 可提高折射率，並維持住極低的轉移溫度。Example 7 Example 8 Example 9 Example 10 Composition P2O5 40 40 40 40 Nb2〇5 10 10 10 10 Sr〇40 30 20 10 L12O 10 20 30 40 Na2〇0 0 0 0 K2O 0 0 0 0 Charcteristic Values nd 1.6591 1.6537 1.6453 1.6369 Tg/°C 500 451 409 411 P 3.432 3.298 3.114 2.921 In addition, as shown in Example ll (Ex. ll) to Example 14 (Ex. 14) of Table 3, the content of lithium oxide and cerium oxide is fixed, and pentoxide is enhanced. The content of diterpenes to 1 5% and the reduction of phosphorus pentoxide to 35 ° / 〇, 201204671 can increase the refractive index and maintain a very low transfer temperature.
Example 11 Example 12 Example 13 Example 14 Composition P2O5 35 35 35 35 Nb2〇5 15 15 15 15 Sr〇 40 30 20 10 L12O 10 20 30 40 Na2〇 0 0 0 0 K2O 0 0 0 0 Charcteristic Values nd 1.6864 1.6743 1.6656 1.6522 Tg/°C 515 474 423 442 P 3.652 3.465 3.277 3.106 再者，如表四之實例15(Εχ.15)〜實例18(Εχ.18) 所示，固定氧化鋰之含量，同時降低氧化锶與五氧化 二磷（30%)之含量，並提升五氧化二鈮之含量至30%， 可更提高折射率至1. 85並維持住低的轉移溫度。 e 201204671 表四 Example 15 Example 16 Example 17 Example 18 Composition P2O5 30 30 30 30 Nb2〇5 30 30 30 30 Sr〇 30 20 10 0 Li2〇 10 20 30 40 Na2〇 0 0 0 0 K2O 0 0 0 0 Charcteristic Values nd 1.852 1.848 1.847 1.831 Tg/°C 597 556 524 529 P 3.813 3.670 3.534 3.361 由上可知，本發明所提供之光學玻璃，係磷酸鹽 系玻璃，其適當調整各成分之比例可使折射率提升至 1. 85，阿貝數最高可達46. 7，高於習知磷酸鹽系光學 玻璃之阿貝數，而可具備更佳之光學品質。 【圖式簡單說明】 益 »»»、 【主要元件符號說明】 益 *»»、 10Example 11 Example 12 Example 13 Example 14 Composition P2O5 35 35 35 35 Nb2〇5 15 15 15 15 Sr〇40 30 20 10 L12O 10 20 30 40 Na2〇0 0 0 0 K2O 0 0 0 0 Charcteristic Values nd 1.6864 1.6743 1.6656 1.6522 Tg/°C 515 474 423 442 P 3.652 3.465 3.277 3.106 Furthermore, as shown in Example 15 (Εχ.15) to Example 18 (Εχ.18) of Table 4, the content of lithium oxide is fixed while reducing yttrium oxide and yttrium The content of phosphorus oxide (30%), and the content of antimony pentoxide to 30%, can further increase the refractive index to 1.85 and maintain a low transfer temperature. e 201204671 Table 4 Example 15 Example 16 Example 17 Example 18 Composition P2O5 30 30 30 30 Nb2〇5 30 30 30 30 Sr〇30 20 10 0 Li2〇10 20 30 40 Na2〇0 0 0 0 K2O 0 0 0 0 Charcteristic Values Nd 1.852 1.848 1.847 1.831 Tg/°C 597 556 524 529 P 3.813 3.670 3.534 3.361 It can be seen from the above that the optical glass provided by the present invention is a phosphate-based glass, and the ratio of each component can be appropriately adjusted to increase the refractive index to 1 85, Abbe number up to 46.7, higher than the Abbe number of the conventional phosphate-based optical glass, and can have better optical quality. [Simple description of the schema] Benefits »»», [Key component symbol description] Benefits *»», 10