TW201247586A - Optical glass, optical element and preform - Google Patents

Abstract

The present invention provides an optical glass, an optical element and a preform, which can correct the chromatic aberration of a glass lens precisely with higher abnormal dispersion to provide high refractivity and low dispersion (high Abbe number) and which have less wear value compared with prior arts and are suitable for a grinding process. The optical glass of the present invention has P5+, Al3+ and Mg2+ as the cation components and O2- and F- as the anion components, wherein the total of Mg2+ content (cation%) and Ca2+ content (cation%) is 0.25 relative to the ratio ((Mg2+ + Ca2+)/R2+) of the total content (R2+: cation%) of alkaline earth metal, and the wear value is less than 440.

Description

201247586 VI. Description of the Invention: [Technical Field] The present invention relates to an optical glass, an optical element, and a preform. [Prior Art] The lens system of an optical machine is usually designed by combining a plurality of glass lenses having different optical properties. In recent years, the characteristics of the lens system of an optical device have been diversified, and in order to further expand the degree of freedom in design, an optical glass having an optical characteristic that has not been previously focused has been developed. Among them, the optical glass whose characteristics are abnormally dispersed 008/) has a remarkable effect as a color correction for aberration. For example, in the patent documents 1 to 4, the optical glass having a high degree of high refractive index, low dispersibility, and workability, which is required for the prior art, has a high degree of abnormal dispersibility, and includes, for example, p5+, gossip 3+. An alkaline glass metal ion or the like is used as a cationic component, and contains an optical glass of F· and 〇2· as an anion component. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. 2008-55877 (Patent Document 2) Japanese Patent Laid-Open Publication No. 2008-137877 (Patent Document 3) International Publication No. 2008/111439 [Patent Document 4] Japanese Patent Laid-Open Publication No. 2009-256169 [Draft of the Invention] [Problems to be Solved by the Invention] However, the prior optical glass processing described in Patent Documents 1 to 4 is 163027.doc 201247586 . That is, it is expected to develop an optical glass which maintains high abnormal dispersibility and has workability. The object of the present invention is to solve the above problems. That is, an object of the present invention is to provide an optical glass which can correct the chromatic aberration of a glass lens with high abnormal dispersibility and which is easier to polish than the former, and which is easy to be polished. And preforms. [Technical means for solving the problem] The present inventors have made intensive studies to solve the above problems, and have completed the present invention. The present invention is the following (1) to (8). (1) An optical glass comprising P5, A丨3 + and River 82+ as a cationic component, containing Ο2· and F· as an anion component, and

The ratio of the total content of Mg2+ (Cation %) and Ca2+ content (Cation %) to the total content of alkaline earth metals (R2+: cation %) ((Mg2++Ca2+)/R2+) is 〇.25 or more, abrasion The degree is below 440. (7) The optical glass of the above (1), wherein the ratio of the Mg2+ content (% of the cation) to the total content (RZ+: cation%) of the alkaline earth metal (Mg2+/R2+) is 〇·3〇 or more. (3) The optical glass according to (1) or (7) above, wherein the refractive index (tetra) is 1.50 to 1.60, and the Abbe number (vd) is 6 〇 to 8 。. (4) The optical surface according to any one of the above items (1) to (3), wherein a partial dispersion ratio (0g, F) is 0.530 or more. </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> <RTIgt;

The content of Al3 + is 5 to 20%.

The content of Mg2+ is 〇.1~30〇/〇,

The content of Ca2+ is 〇丨~;^%, and the content of S++ is 〇~2〇0/〇,

The content of Ba2+ is 〇丨~^%, and the content of V is 30~70〇/〇.

The content of Zn2+ is 〇15 〇/〇, and the content of F is 20 to 70% in terms of anion % (% by mole). (6) An optical element comprising the optical glass according to any one of (1) to (5) above, wherein the preform comprises a preform as described in any one of the above (1) to (5) The optical glass of the item is used for polishing and/or precision press molding. A W-type optical element obtained by precisely pressing a preform of the above (7). [Effects of the Invention] According to the present invention, it is possible to provide a chromatic aberration which can correct a glass lens with high precision by a high degree of abnormal dispersibility, and (4) an optical which is easy to perform polishing by a lower degree of wear than the former. Broken, metaphysical and pre-formed. [Embodiment] The present invention will be described with reference to 163027.doc 201247586. The present invention relates to an optical glass containing P5 as a cationic component, containing ruthenium 2· and F· as an anion component, and a total of Mg 2+ content (cation 〇 / 〇 and Ca 2+ content (cation %) in total with respect to alkaline earth metals The ratio of the content ratio (r2+: cation%) ((Mg2++Ca2+)/R2+) is 〇u or more, and the abrasion degree is 440 or less. Hereinafter, the optical glass is also referred to as "the optical glass of the present invention". Component&gt; Each component constituting the optical glass of the present invention will be described. In the present specification, the content of each component is all expressed by the cation % or the anion % based on the molar ratio unless otherwise specified. Here, the "cation %" and the "anion %" are obtained by separating the glass constituent component of the optical glass of the present invention into a cationic component and an anionic component ' and setting the total ratio thereof to 1 〇〇 mol %. The composition of each component contained in the representation. Further, for the sake of convenience, the ion valence of each component is a representative value, and is not distinguished from other ion valences. The ion valence of each component in the glass may be other than the representative value. For example, p is usually present in the glass in the state where the ion valence is $, and thus is expressed as "p5+" in the present specification, but may be in the state of other ions. In the present specification, the presence of 1 is strictly in the state of other ion valences. In the present specification, each component is still treated as a material having a purely pure material price. [About cationic component] &lt;P5 +&gt; 163027.doc 201247586 The optical glass of the present invention contains p5+. p5+ is a glass forming component and has a property of suppressing devitrification of glass and increasing refractive index. Since this property is enhanced, the content of p5+ is preferably 20.0~. More preferably, it is 25.0% or more, and further preferably 30.0% or more. Further, it is preferably 50.0% or less, more preferably 45.0% or less, still more preferably 43.0% or less, and further preferably 41.0. % or less. P5+ can be used, for example, ΑΚΡΟ)), Ca(P03)2, Ba(P03)2, Zn(P〇3)2' BPO4, Η#. 4 or the like is contained in the glass as a raw material. &lt;Α13+&gt; The optical glass of the present invention contains Al3+β a13+ and has the property of improving the resistance to devitrification of the glass and reducing the abrasion. Since this property is enhanced, the content of A13+ is preferably 5 to 20.0%. Further, it is more preferably 7.0% or more, still more preferably 1% by weight or more, and still more preferably 12.0 or more. Further, it is more preferably 18% by weight or less, further preferably 16.0% or less. A13 can be contained in the glass using, for example, Α1(Ρ〇3)3, A1I?3, 丨2丨3, and the like as a raw material. &lt;Alkaline earth metal&gt; In the optical glass of the present invention, the alkaline earth metal means Mg2+, Ca2+,

Sr2 and Ba. Further, at least one selected from the group consisting of Mg2+, Ca2+, Sr2+, and Ba2+ may be represented as follows.

Further, the total content of R2+ is the ratio of the four kinds of ions (Mg2++Ca2++Sr2++Ba2+). . The total content of S R2+ is preferably 3〇, 〇~7〇〇%. The original reason is... 163027.doc 201247586 For the above range, a more stable glass can be obtained. The total content of R is more preferably 35 % by weight or more, still more preferably 4% by weight or more, and still more preferably 44.0% or more. Further, it is preferably 65 % or less, more preferably 60.0 /. Hereinafter, it is more preferably 55 〇% or less' and further preferably the following. &lt;Mg2+&gt; The optical glass of the present invention contains Mg2 and Mg2+, and has the property of improving the resistance to devitrification of glass and reducing the degree of abrasion. Since such a property is enhanced, the content of Mg2+ is preferably 0.1 to 30.0% Å and more preferably 2.% by weight or more, more preferably 5% by weight or more, more preferably 10.0% or more. Further, it is more preferably 25% by weight or less, still more preferably 20.0% or less.

Mg2+ can be contained in the glass using, for example, Mg〇'Μ#2 as a raw material. &lt;Ca2+&gt; The optical glass of the present invention preferably has a property of containing Ca2+ to improve resistance to devitrification, to suppress a decrease in refractive index, and to reduce the abrasion of glass. Since this property is enhanced, the content of Ca2+ is more preferably 0.1% to 30.0%. Further, it is more preferably 5 〇% or more, still more preferably 1 〇 〇 % or more, still more preferably 12.0% or more, and still more preferably 13 〇 % or more. More preferably, it is 20.0% or less, and further preferably 16% or less.

Ca2+ can be contained in the glass using, for example, Ca(P〇3)2, CaC〇3, etc. as a raw material. The optical glass of the present invention preferably contains ~+ as an essential component in I63027.doc 201247586 and contains Ca2+. When these two components are combined, the devitrification resistance of the glass, the decrease in the refractive index, and the reduction in the degree of abrasion are improved, and in particular, the property of improving the devitrification resistance of the glass is enhanced. Further, the optical glass of the present invention preferably further contains Sr2+ and/or Ba2+ as other soil-improving metals. In the optical glass of the present invention, the ratio of the total Mg2+ content (cation %) and the Ca2+ content (cation %) to the total content of alkaline earth metals (R2+: cationic %) ((Mg2++Ca2+)/R2+ ) is 0.25 or more. The lower limit of (Mg2+ + Ca2+) / R2+ is preferably 〇 28, more preferably 〇 Η, still more preferably 〇 34, still more preferably 0.36, still more preferably 0.38. Further, the upper limit of (Mg2++Ca2+)/R2+ is preferably 0.80, more preferably 〇75, more preferably 〇7〇, and still more preferably 0.68. The inventors have found that if Ρ5+, Α13+, MgZ+ are contained And Ca2+ as a cationic component, and an optical glass containing Ο2· and F· as an anion component, and (Mg2, Ca2+)/R2+ is 0.25 or more, and it is possible to accurately correct the glass lens by a high abnormal dispersibility. An optical glass which is chromatic aberration and which is less abrasive than the former and which is easy to be polished. Further, in the optical glass of the present invention, the ratio of Mg2+ content (cation %) (Mg2+/R2+) is preferably 〇.3〇 or more. The lower limit of Mg2+/R2+ is preferably ''more preferably 〇.34' or more preferably 0 36, and further preferably 〇37. also:

The upper limit of Mg2'R2+ is preferably 〇75', more preferably 〇7〇, still more preferably 〇 & and preferably 0.63. The present inventors have found that if it contains a P5 component, the optical glass containing 〇2· and & ions as an anion component, (Mg + Ca 2+ ) / R 2+ is 0 25 or more 'and then Mg 2+ / R 2+ is above 163 027. Doc 201247586 Obtains an optical glass that can correct the chromatic aberration of the glass lens with higher abnormal dispersion and thus has a lower wear rate than the former and is easy to be polished. &lt;Sr2+&gt; The optical glass of the present invention has a case where Sr2+ is contained as r2+ (alkaline earth metal). Sr2+ has the property of increasing the resistance to devitrification of the glass and suppressing the decrease in the refractive index. Since this property is enhanced, the content of Sr2+ is preferably 0/〇 20.0/. . Further, it is more preferably i 〇 % or more, and still more preferably 2 〇 % or more. Also, it is better to be 1 7.0. /. Hereinafter, it is more preferably 丨4 〇% or less.

Sr2+ can be contained in the glass using, for example, Sr(N〇3)2, % or the like as a raw material. &lt;Ba2+&gt; The optical glass of the present invention has five kinds of Ba2+ as R2+ (alkaline earth metal). Ba2+ has a devitrification property when the glass is contained in a specific amount! Moreover, it has the property of maintaining low dispersion and increasing the refractive index. Since such a property is enhanced, the content of Ba2+ is preferably 5.0/", more preferably 2% by weight or less, more preferably less than or equal to, and more preferably 17.0% or less. Further, preferably more than 1% by weight. More than 5 or more 'better than 10.0%' is better than 12% or more for 13 plays or more, and the money is for 14.GM. For f, for example, Ba(p〇3)2, _〇3 can be used. Ba(N(8)2, Μ, etc. are contained in the glass as a raw material. 163027.doc 201247586 &lt;Zn2+&gt; The optical glass of the present invention may further contain Zn2+ as an optional component. The ruthenium has an improved degree of wear and a refractive index of the surface. Since the property is enhanced, the content of Zn2+ is preferably from 0% to 15% by volume, and more preferably 1.0% or more, and more preferably h5% or more. It is 12.0% or less, more preferably 8.0 ° /. or less, more preferably 4.0 ° /. or less, further preferably 2.0% or less. For Ζ η, for example, Ζη(Ρ〇3)2, Ζη〇, ΖηΙ?2, etc. can be used. In the present invention, Ln3+ means at least one selected from the group consisting of Υ3+, La3+, Gd3+, Yb3+, and Lu. The total content ratio of n3+ is the total content of the five kinds of ions (Y3++La3++Gd3++Yb3H-+Lu3+). The optical glass of the present invention preferably has a total content of 1% or less. The reason for containing Ln'l+ is that the content of the above-mentioned range is increased, and the refractive index of the glass is increased, which tends to be low dispersion. Further, it is preferably 9% or less, more preferably 8.0% or less. Further preferably, it is 7 〇% or less.

Ln3 is an optional component, and thus the optical glass of the present invention may not contain Ln3+c&lt;Y3+&gt; The optical glass of the present invention may contain γ3+ as [^ + 丨 species γ3+ has a low dispersibility and improves refraction. Rate, improve the nature of resistance to devitrification. However, if it is contained in excess, the stability is liable to deteriorate, so that it is more preferably 9 〇% to 163027.doc 201247586, more preferably 8.01⁄4 or less, still more preferably 7% by weight or less. Further, since the glass of the present invention can be obtained without Y3, it is also possible to use γ3+ 〇 Υ3 + as a raw material and to contain it in the glass. &lt;La3+&gt; The optical glass of the present invention may contain La3+ as a species. La3+ has the property of maintaining low dispersion and increasing refractive index. Since this property is enhanced, the content of La3+ is more preferably 9% or less, more preferably 8.0%. Hereinafter, it is more preferably 7 〇% or less.

La3 + can be contained in the glass using, for example, La2〇3, Lah, or the like as a raw material. &lt;Gd3+&gt; The optical glass of the present invention may contain Gd3+ as a quinone. Gd3 + has the property of maintaining low dispersibility and increasing the refractive index, thereby improving the resistance to devitrification. Since such a property is enhanced, the content of Gd3+ is more preferably 9% or less, more preferably 8.0% or less, and still more preferably 7% by weight or less.

Gd3 can be contained in the glass using, for example, Gd2〇3, GdF3 or the like as a raw material. &lt;Yb3+&gt; The optical glass of the present invention may contain Yb3 + as a species of [^ +. Yb3+ has a property of maintaining low dispersibility, increasing refractive index, and further improving resistance to devitrification. As this property is enhanced, the content of Yb3+ is more preferably 9·0°/〇 or less, more preferably 8.0% or less. Further preferably, it is 7 % or less. 163027.doc •12· 201247586

Yb can be contained in the glass using, for example, Yb2〇3 or the like as a raw material. &lt;Lu3+&gt; The optical glass of the present invention may contain Lu3+ as a species of +^. Μ has the property of maintaining low dispersibility, increasing refractive index, and thus improving devitrification. Since this property is enhanced, 妯 &amp; τ 3+ Α Therefore, the content of Lu is more preferably 9,0% or less, more preferably 8 or less, and further preferably 7.0% or less.

Ln3 + can be contained in the glass using, for example, Lu 2 〇 3 or the like as a raw material. &lt;Si4+&gt; The optical glass of the present invention may contain Si and is an optional component. ^+ has the property of increasing the loss resistance of the surface, increasing the refractive index, and reducing the wear at the same time. The content is preferably increased by 1% or less, more preferably 8.0% or less, and still more preferably 5% by weight or less. The sf can be contained in the glass using, for example, Si〇2, Κ2^6, or (10)6 as a raw material. &lt;β3+&gt; The optical glass of the present invention may contain cerium and may be an optional component. When β3+ is contained in a specific amount, it has a property of improving the devitrification resistance of the glass, increasing the refractive index, and lowering the degree of wear, and further making it difficult to deteriorate the chemical durability. Since this property is enhanced, the right-hand rate &lt; 3 abundance is preferably 15.0. / 〇, preferably 8.0% or less, more preferably 5.0% or less, and further below. Further, it is preferably 〇.1% or more, more preferably 〇5% or more ΙΜ.0% or more. Further preferably 163027.doc 13 201247586 B3+, for example, H3B〇3, Na2B4〇7, BP〇4, etc. may be used. It is contained in the glass as a raw material. &lt;Li+&gt; The optical glass of the present invention may contain Li+ as an optional component. Li+ has the property of maintaining the devitrification of the glass when it is formed, while reducing the glass transition point (Tg). The content of Li+ is preferably 20.0% or less, more preferably 15.0% or less, and further preferably 丨〇% or less.

Li+ can be contained in the glass using, for example, LhCO3, LiN〇3, UF or the like as a raw material. &lt;Na+&gt; The optical glass of the present invention may contain Na+ as an optional component. Na+ has the resistance to devitrification when the glass is formed, while reducing the nature of the glass transition point (Tg). Since such a property is enhanced, the content of Na+ is preferably at most 〇〇%, more preferably at 8.0. /. Hereinafter, it is more preferably 5% or less.

Na+ can be contained in the glass using, for example, Na2C〇3, NaN〇3, _, Na2Sih or the like as a raw material. &lt;K+&gt; The optical glass of the present invention may contain Κ+ as an optional component. 〖+ has the secret of maintaining the glass-shaped slant, while reducing the nature of the glass-shift point (four). Because of this property enhancement, it is better than 8.0%, so the content of Κ is preferably ι〇·〇〇/ο Further, it is preferably 5.0% or less. 163027.doc • 14 - 201247586 κ can be contained in glass using, for example, K2C〇3, icN〇3, KF, KHf2, K2SiF6, etc. as raw materials. &lt;Rn+&gt; In the optical glass of the present invention, the total content of Rn+ (Rn+ is at least one selected from the group consisting of Li+, Na+, and κ) is preferably 2% or less, more preferably It is 15.0°/. Hereinafter, it is more preferably 1% or less. &lt;Nb5+&gt; The optical glass of the present invention may further contain Nb5+ as an optional component. nP+ has the property of increasing the refractive index of the glass, improving the chemical durability, and further suppressing the decrease in the Abbe number. Since this property is enhanced, the content of Nb5+ is preferably 丨〇% or less, more preferably 8.0. /. Hereinafter, it is more preferably 5 _〇% or less.

Nb5 + can be contained in the glass using, for example, Nb2〇5 or the like as a raw material. &lt;Ti4+&gt; The optical glass of the present invention may contain Ti4+ as an optional component. Ti4+ has the property of increasing the refractive index of glass. Since such a property is enhanced, the content of Tio is preferably 100% or less, more preferably 8.0% or less, still more preferably 5% by weight or less.

Ti can be contained in the glass using, for example, Ti 2 or the like as a raw material. &lt;Zr4+&gt; The optical glass of the present invention may further contain Zr4+ as an optional component of ❶Zr4+ having a property of increasing the refractive index of the glass. Since such a property is enhanced, the content of Zr4+ is preferably 1% or less, more preferably 8.0% or less, still more preferably 5% or less. I63027.doc 15· 201247586

Zr4+ can be contained in the glass using, for example, Zr〇2, ZrF4, or the like as a raw material. &lt;Tas+&gt; The optical glass of the present invention may further contain Ta5+ as an optional component. Ta5+ has a property of increasing the refractive index of the glass. Since such a property is enhanced, the content of Ta5+ is preferably 10,000% or less, more preferably 8.0% or less, still more preferably 5% by weight or less.

Ta5+ can be contained in the glass using, for example, Ta2〇5 or the like as a raw material. &lt;W6+&gt; The optical glass of the present invention may contain W6+ as an optional component. W6+ has the property of increasing the refractive index of the glass and lowering the transfer point of the glass. Since such a property is enhanced, the content of W6+ is preferably 100% or less, more preferably 8.0% or less, still more preferably 5% by weight or less. W6+ can be contained in the glass using, for example, w〇3 or the like as a raw material. &lt;Ge4+&gt; The optical glass of the present invention may contain Ge4+ as an optional component. Ge4. has the property of increasing the refractive index of glass and improving the resistance to devitrification of glass. Since such a property is remarkable, the content is preferably 10.0 = or less, more preferably 8 % by weight or less, still more preferably 50% or less.

Ge4+ can be contained in the glass using, for example, Ge〇2 or the like as a raw material. &lt;Bi3+&gt; The optical glass of the present invention may contain, as an optional component. Bi3+ has the refractive index of the interpolated glass and reduces the properties of the glass transition point. Since such a property is enhanced, the content of 妯 3 + is preferably 1 〇.〇% or less, more preferably 8.0% or less, and further preferably 5 or less. 163027.doc 201247586 1 can be contained in glass using, for example, Βι 2 〇 3 or the like as a raw material. &lt;Te4+&gt;: The optical glass of the invention may contain Te and is an optional component. D, has the refractive index of the glass, lowers the glass transition point, and suppresses the coloring property. Since this property is enhanced, it is preferably 10.0% or less and 5.0% or less. Therefore, the content of Te4+ is preferably 15.0% or less, more preferably 8.0% or less, and further preferably

Te4+ can be contained in the glass using, for example, Te〇2 or the like as a raw material. [About anionic component] &lt;F&gt; The optical glass of the present invention contains F and F. It has a property of improving the abnormal dispersibility of the glass and the Abbe number, and further devitalizing the glass. Since such a property is enhanced, the content of F- is preferably from 20.0 to 70.0% in terms of an anion % (% by mole). Further, it is more preferably 3 〇 以上% or more, still more preferably 35.0% or more, and still more preferably 38 〇 % or more. More preferably, it is (4)% or less, more preferably 50·0°/. Hereinafter, it is more preferably 48% or less. F 5M is contained in the glass using, for example, a fluoride of various cationic components such as AIF3, MgFz or BaF2 as a raw material. &lt;〇2&gt; The optical glass of the present invention contains 〇2·. 02- has the property of suppressing the increase in the abrasion rate of the glass. Since this property is enhanced, the content of cerium 2 is preferably 30. 0 to 80.0% β, more preferably 4% or more, more preferably 163,027.doc 17 201247586 is 45.0, expressed as anion % (% by mole). % or more, further preferably 5% or more. More preferably, it is 70.0% or less, more preferably 66.0 °/. Hereinafter, it is more preferably 62% or less. In addition, the total content of Ο2 and the content ratio of F· is preferably 98.0% or more, more preferably 99.0% or more, and still more preferably 100%, expressed as an anion %. The reason for this is that a stable glass can be obtained. 〇2·Alternatively, various cation components such as Al2〇3, MgO, and Ba0, or various cationic components such as ai(p〇3)3, Mg(P〇3)2, and Ba(p〇3)2 can be used. Phosphate or the like is contained in the glass as a raw material. In the optical glass of the present invention, other components may be added as needed within the range which does not impair the characteristics of the glass of the invention of the present application. [Regarding ingredients which should not be contained] Next, the components which should not be contained in the optical glass of the present invention and the components which are not preferable in the description will be described.

Ti, Zr, Nb 'W, La, Gd, Y, Yb, Lu except for yttrium, lanthanum, Μ 'Fe 'Co 'Ni, Cu, Ag, Mo and other transition metal cations have a small amount even if they are separately or in combination In the case of the case, the glass is also colored, and the specific wavelength of the visible light region is absorbed. Therefore, in particular, in the optical glass using the wavelength of the visible light region, it is preferable that the optical glass is substantially not contained. Further, cations of Pb, Th, Cd 'Tl, Os, Be, and Se have been used as a harmful chemical substance in recent years, and are not limited to the production process of glass, even in the processing steps of the processing and the post-product processing. All measures are required to take environmental measures. Therefore, in the case of paying attention to the influence of the environment, it is preferable that the inclusion is not substantially contained except for the inevitable mixing. 163027.doc 201247586 Thereby, the optical glass does not substantially contain substances that pollute the environment. Therefore, even if the measures for the special environmental measures are not taken, the optical glass can be manufactured, processed, and discarded. It is not contained in the optical. In this view, although Sb can be used as a defoaming agent, it can be used as an environment in the near glass. The preferred point of the optical surface of the present invention is that it does not contain Sb». The optical glass of the present invention is preferably as follows: as a cationic component, the content of P5 + is 20 to 55%, expressed as % of cation (% by mole).

The content of Al3+ is 5~2〇〇/0.

The content of Mg2+ is 0.1 to 30%.

The content of Ca2+ is 〇,

The content of Sr2+ is 〇~2〇%,

The content of Ba2+ is 〇U5%, and the content of R is 3〇~7〇0/0.

The content of Zn2+ is 〇15 〇/〇, and the content of F· is 20 to 70%, the content of 〇· is 30 to 80%, and the refractive index (nd) is expressed by % of anion (% by mole). It is 1.50 M.60, the Abbe number (vd) is 6 〇 to 8 (), and the abrasion degree is 440 or less. Further, it is preferred that the partial dispersion ratio (eg, F) is 〇 530 or more. [Manufacturing Method] 163027.doc 19 201247586 The method for producing the optical glass of the present invention is not particularly limited. For example, it can be produced by uniformly mixing the raw materials in such a manner that the respective components are within a specific content range. The prepared mixture is introduced into quartz crucible or alumina crucible or platinum crucible for coarse melting, and then added.翻 埚, platinum alloy 坩埚 or 铱坩埚 in the temperature range of 900~120 (TC 溶 2~1 〇 hours, stir homogenization and defoaming, etc., then drop to 85 〇. 〇 below the temperature, then fine The veins are removed by stirring, and cast into a mold to be slowly cooled. [Physical properties] The optical glass of the present invention is characterized by a partial dispersion ratio (eg F). Therefore, an optical glass capable of correcting chromatic aberration with high precision can be obtained. (0g, F) is preferably 0.530 or more, more preferably 0.534 or more, still more preferably 0.538 or more. Further, the 'partial dispersion ratio (0g, F) means measurement based on the Japan Optical Glass Industry Association standard JOGISO1-2003. The optical glass of the present invention has a high degree of dispersibility (?"/). Therefore, it is easy to obtain a lens which can correct chromatic aberration with high precision. The abnormal dispersibility (Aeg'F) is preferably More preferably, it is 0 012 or more, more preferably 0.014 or more, still more preferably 〇〇16 or more, more preferably 0.018 or more, here, partial dispersion ratio (eg, F) and abnormal dispersibility ( △ ", 〇 will be described, and then the characteristics of the physical properties of the optical glass of the present invention will be described in more detail. First, the partial dispersion ratio (Gg, F) will be described. 163027.doc • 20· 201247586 Partial dispersion The ratio (eg, F) indicates the ratio of the refractive index difference in the two wavelength regions in the wavelength dependence of the refractive index, and is expressed by the following equation: 0g, F = (ng - nF) / (nF - nc) (1) where ng is the refractive index at g-ray (435.83 nm), nF is the refractive index at f-ray (486, 13 nm), and nc is c-ray. (65.27 nm) refractive index. And 'If the partial dispersion ratio 〇g, F) and Abbe number (Vij) are plotted on the XY chart, in the case of general optical glass, The figure is on a straight line called a regular line. The so-called regular line refers to the χ γ chart with the partial dispersion ratio (0g, F) as the vertical axis and the Abbe number (V(j) as the horizontal axis. On the coordinates), the NSL7 and PBM2 are connected to the right side of the two points formed by the partial dispersion ratio and the Abbe number plot (see Figure 丨). The standard glass that becomes the basis of the regular line is based on the optical glass manufacturer. The difference is different, but each company is defined by roughly the same slope and intercept (NSL7 and ΡΒΜ2 are optical glass manufactured by OHARA Co., Ltd., and the Abbe number (vd) of NSL7 is 60.5, partial dispersion ratio ( 0g, F) is 〇5436, and the Abbe number (vd) of PBM2 is 3 6.3 'partial dispersion ratio (eg, F) is 0.5828). With respect to the above partial dispersion ratio (0g, F), the so-called abnormal dispersion (Δeg:, F) is a graph showing partial dispersion ratio (0g, F) and Abbe number (vd) from the regular line to the longitudinal direction. The extent to which the direction deviates. An optical element comprising a glass having a high degree of dispersibility (?eg:.f) has a property of correcting chromatic aberration generated by other lenses in a wavelength range near blue. Further, in the middle-low dispersion region (the area where the Abbe number is 55 or more), the higher the Abbe number (vd), the higher the abnormal dispersion (Δ", !;) is 163027.doc 201247586 Further, it has been difficult to maintain the abnormal dispersibility at a high level while the degree of wear is 440 or less. The present inventors have actively studied and succeeded in developing an abnormal dispersibility (structure, which is higher than the Abbe number (10). For example, if the optical glass is a preferred embodiment as shown in the following examples, the degree of wear is 405 or less and the Abbe number (vd) is about 73 to 7? In this case, an optical glass having a partial dispersion ratio (GgF) of 〇54〇 or more and an abnormal dispersibility (Δ6g, F) of 0.018 or more can be obtained. The optical glass of the present invention has a higher refractive index (nd) and has a higher refractive index (nd). Low dispersibility (higher Abbe number). In the optical glass of the present invention, the refractive index (nd) is preferably 丨5〇~丨, more preferably 1.50 to 1.58. The refractive index (nd) is preferably 151 or more, more preferably 1.52 or more. Further, preferably 丨.57 or less, more Preferably, in the optical glass of the present invention, the Abbe number (vd) is preferably 6 Å to 8 Å. The Abbe number is preferably 65 or more, more preferably 70 or more, and still more preferably 73 or more. Further, it is preferably 78 or less, and more preferably 77 or less. The refractive index (nd) and the Abbe number (vd) are values obtained by measurement based on the Japan Optical Glass Industry Association standard JOGISO1-2003. The optical glass of the invention preferably has an abrasion degree of at least 44 Å or less. Therefore, it is possible to reduce the wear and damage necessary for the optical glass, and to facilitate the operation in the polishing process of the optical glass, thereby facilitating the grinding process. The abrasion degree is more preferably 430 or less, more preferably 420 or less, more preferably 410 or less, still more preferably 410 or less, and further preferably 405 or less. 163027.doc -22- 201247586 On the other hand, if the abrasion rate is too low, it is difficult to grind. Therefore, the degree of wear is preferably 80 or more, more preferably 1 or more, and still more preferably 120 or more. Further, the term "wearing degree" refers to the measurement of the abrasion degree of the optical glass according to "JOGIS10-1994". Method" Further, the optical glass of the present invention preferably has optical characteristics such as desired imaging characteristics in a wider temperature range. In recent years, such as projectors, photocopiers, laser printers, and playback devices. When optical components assembled in optical devices are used in more severe temperature environments, for example, in projectors, in order to meet the requirements of miniaturization and high resolution, it is necessary to use a high-intensity light source and high precision. The optical system, especially in the case of using a high-intensity light source, due to the influence of the heat generated by the light source, the temperature of the optical component constituting the optical system is likely to vary greatly, and the temperature reaches 1 〇〇ta. There are also many cases. In this case, when a high-precision optical system is used, the influence of temperature fluctuation on the imaging characteristics of the optical system and the like becomes large, and it is required to constitute an optical fiber that does not change in optical characteristics due to temperature fluctuation. system. Further, even in the case of an optical system in which the refractive index is required to be extremely accurate as in the optical system of an optical apparatus having high resolution, there is a case where the influence of the use temperature on the imaging characteristics or the like cannot be ignored. The optical glass of this month is preferably an optical glass which can obtain optical characteristics such as imaging money in a wider temperature range. The optical glass of the moon is preferably the temperature coefficient of relative refractive index (dn/dT) 163027.doc -23- 201247586 is close to zero. The lower limit of the temperature coefficient C) of the relative refractive index (589.29 nm) is preferably -6.00. . · 1, more preferably ^xlO·6. . -1, and further preferably -5.〇χΐ〇+Γ •丨站, L. Therefore, even in the case where the temperature of the optical element changes greatly, the change in the refractive index of the environment is small, so that the desired optical characteristics can be exhibited with high precision in a wider range of degrees. . On the other hand, if the temperature coefficient of the relative refractive index is excessively large in the positive direction, the change in the refractive index caused by the temperature change of the optical 7C member may become large. Therefore, the optical glass of the present invention may have an upper limit of the temperature coefficient of the relative refractive index of more preferably, more preferably 5 5 χ 1 〇 -6 Å, and even more preferably 5.0 > 〇 〇 -6. (:-1. The temperature coefficient of the relative refractive index of the optical glass of the present invention is preferably smaller, preferably 〇. Further, the temperature coefficient of the relative refractive index is expressed as the same temperature as the optical glass. In the air, when the temperature of the optical glass is changed while the temperature of the optical glass is changed, the amount of change in the refractive index per lt (χ1〇-6 t.1) is observed. [Preforms and optical components] The optical glass of the invention can be used for various optical components and optical designs, and it is particularly preferable to form a preform from the optical glass of the present invention, and to form a lens or a mirror or a mirror by using a method such as grinding or precision press molding on the preform. An optical component, whereby high-precision and high-precision imaging characteristics can be realized when used in an optical device such as a camera or a projector that allows visible light to penetrate an optical element. Here, the method of manufacturing a preformed body is not In particular, a method of forming a glass gob as described in, for example, Japanese Patent Laid-Open No. Hei 8-3 19124, Japanese Patent Laid-Open No. Hei 8-73229 163027.doc • 24·20124 The method for producing an optical glass according to the invention, and the method for directly producing a preform from a molten glass, and a method for producing a cold-process such as grinding and polishing of a strip formed of optical glass. Further, in the case of the optical glass of the present invention which can obtain optical characteristics such as desired imaging characteristics over a wider temperature range, it is possible to obtain a better preform and an optical element using the same, and therefore it is preferable that the film [Example] The composition of the glass of Examples 1 to 16 and Comparative Example 1 of the optical glass of the present invention (expressed as % by mole of cation % or % of anion %), refractive index (nd), and Abbe number (vd) The partial dispersion ratio (eg, F), the abnormal dispersibility (Δ0g, F), and the abrasion degree (Aa) are shown in Table 1. The optical glasses of Examples 1 to 16 and Comparative Example 1 of the present invention were produced in the following manner. 'When the raw material of each of the normal fluorostearate glasses, such as oxides, carbonates, nitrates, fluorides, and metaphosphoric acid compounds, which are the raw materials of the respective components, is selected, as shown in Table 1 Various embodiments The composition ratio is weighed and uniformly mixed, and then put into a platinum crucible. According to the melting difficulty of the glass composition, it is melted in an electric furnace at a temperature range of 900 to I200 ° C for 2 to 10 hours. After the foaming, it was lowered to 85 〇β (: the following temperature, and then cast into a mold) to perform slow cooling to produce glass. Here, the refractive indices (nd) of the optical glasses of Examples 1 to 16 and Comparative Example 1, Abbe The number (vd) and the partial dispersion ratio (0g, F) are measured based on the Japan Optical Glass Industry Association standard JOGIS01-2003. Further, as the glass used in the measurement, the annealing condition is used to set the slow cooling rate to _ 25»c/hf, treated in a slow-cooling furnace. And, from the measured Abbe number (vd), the value of the partial dispersion ratio (eg, F) on the regular line of Fig. 1 of 163027.doc •25-201247586, and the measured partial dispersion ratio (eg, F) The difference between the values is used to determine the abnormal dispersion. Further, the degree of wear was measured based on "method of measuring the abrasion degree of optical glass of JOGIS10-1994". That is, a sample of a glass slab of 3〇x3〇xl〇mm size is placed at a starting position of 80 from the center of the cast iron flat disk (250 mm lun) rotated 6 times per minute in the horizontal direction. Applying a load of 9.8 N (1 kgf) vertically on one side and uniformly supplying it to 20 mL of water in 5 minutes, adding #800 (average particle size of 2 μm) of abrasive (alumina Α abrasive grain) The polishing liquid obtained by 〇g was rubbed, and the mass of the sample before and after the polishing was measured to determine the abrasion quality. Similarly, the wear quality of the standard sample specified by the Sakamoto Optical Glass Industry Association was determined, and the calculation was performed by the wear degree = {(wear quality/specific gravity of the sample) / (wear quality / specific gravity of the standard sample) 丨 XI00. In addition, the temperature coefficient (dn/dT) of the relative refractive index of the optical glass is the interference method in the method described in the Japanese Optical Glass Industry Association Standard JOGIS18-1994 "Method for Measuring the Temperature Coefficient of Refractive Index of Optical Glass". Determination 0 163027.doc •26- 201247586 hi 1Comparative Example 1 —Γ38.2Π &lt;N 11.0 Γ19-5Π 1 &gt;7,5 1 00 Γ 47.Γ1 1 55.6 | 44.4 1 1.5484 1 73.3 0.542 0.019 0.229 ;0.229 ί Example 31.2 〇\ (S 13.0 15.2 15.9 vi 16.7 : 1 S2-91 I 55.5 | ΓΜΊ 1 1.5472 1 1 73.2 0.545 Γ〇.〇22Π VO cn 0.589 0.404 00 rn -4.1 -4.3 -4.5 -4.6 •4.7 38.5 14.8 14.0 14.0 Bu-14.0 : Γ46.7Π 丨53.8 ί 46.2 1 1.5322 1 75.8 0.542 0.023 Os v〇0.600 0.429 inch 32.6 14.5 15.2 15.9 wS 16.7 : 1 52-9, 1 1 61.4 | 1 38.6 1 ί 1.5483 1 73.8 0.548 1 0.026 1 gm 0.589 0.404 m «μ 32.6 14.5 15.2 15.9 16.7 : 1 52.9 1 1 58.5 | 41·5__ 1 1 1.5399 ] 丨74.5 0.550 1 0.029 1 00 0.589 0.404 00 rn fn • 对 · ΤΤ Ό· inch-4.7 rj 32.6 1 14.5— 15.2 15.9 wS 16.7 , 1 52.9 1 ! 55.6 I 44.4 1 1.5326 1 0.544 0.024 374 0.589 0.404 2 32.6 14.5 15.2 15.9 i υ-ί 16.7 L 52^1 1 52.8 1 丨47.2 1 1 1.5270 1 ! 75-8 1 | 0.546 | 1 0.027 1 § ΓΟ 1 0.589 0.404 -4.2 -4.5 -4.7 0 »n (N vS (N vS ο 38.0 15.9 13.3 13.9 — 14.5 L 46.2 1 '52^1 47.3 L 1.5292 76.3 0.541 0.023 392 0.589 0.404 vr&gt; rS Bu-4.0 - 4.2 -4.3 OS 38.5 14.8 14.5 15.9 14.5 oo | 44.9 I 1 53,8 1 L 46,2 I 1.5306 75.5 0.542 ! 0.023 364 0.677 0.452 00 38,5 14.8 14.5 15.9 】6·3 , 1 46.7 I | 53.8 I 1 —46.2 I 1 1.5320 I '74.3 0.546 1 0.025 I 374 0.651 0.452 Bu 38.5 14.8 14.5 rn Inch &lt;N 14.5 , oo I 44.9 I | 53.8 I 1 46.2 I 1 1.5326 ] 丨73.9 ,0.552 1 0.030 I 372 0.624 0.452 so 40.9 12.4 16.9 13.5 16.3 , 1 46.7 I 丨 57.7 1 1 42.3 I 1 1.5392 1 ! 73.7 : 0.546 1 0.024 I oo 0.651 0.567 〇rn &lt;s ro V〇CO 卜 fO 00 f^JV) 38.5 14.8 16.9 13.5 16.3 46.7 '53.8 46.2 1.5299 74.7 0.546 0.025 379 0.651 0.567 τΤ 38.5 14.8 14.5 13.5 i (N 16.3 丨1 46.7 II 53.8 1 I 46.2 1 1 1.5326 1 丨73,5 1 0.541 1 0.018 I s ! 0.600 0.452 ΓΟ 38.5 14.8 18.0 13.5 15.3 46.7 ! 53.8 1 46.2 1 I 1.5266 1 75.4 0.542 0.023 405 0.385 0.625 fS 38.5 14.8 12.7 13.5 tj- 14.5 00 I 44.9 I 1 53.8 1 46.2 1 1 1.5336 1 74.0 , 0.542 1 0.020 0 〇〇ΓΟ 0.583 0.373 卜 ro p -4.2 -4.4 inch - 38.5 14.8 12.7 13.5 «Ν — 16.3 | 46.7 II 53.8 I ί 46.2 1.5342 73.8 | 0.544 0.022 ίΛ On 0.561 0.373 00 cn -4.1 v〇-4.7 1 X 00 + A 1 + A t- + • Ό Ό iu oS φ &lt; 1 s 1 -40 ~20°C -20~0eC 0~20eC 20-40〇C 40~60°C 60-803⁄4 Cation 1 1 Anion relative to A l Si i •i/T, take (dn/dT) -27- 163027.doc 201247586 As shown in Table 1, the refractive index (nd) of the optical glasses of Examples 1 to 16 of the present invention was 1.50 to 1.60, and the Abbe number (vd) was 6 〇 to 8 Å. Further, specifically, in any of the embodiments, the refractive index (nd) is 52 1.55' and the Abbe number (vcj) is 73 to 77. Further, in any of the embodiments, the degree of wear is 405 or less. Further, the partial dispersion ratio (0g, F) was 0.541 or more. The abnormal dispersibility (MgF) was 〇18 or more. On the other hand, the optical glass of Comparative Example 1 other than the range of the present invention has a high degree of wear resistance. β The relative refractive indices of the optical glasses of Examples 1, 2, 6, 10, 11, 13, and 16 are shown in Table 1. The temperature coefficient (20 to 40. 〇) is -6. 〇 xl (T6c &gt; C -1 or more is within the desired range. Further, after the optical glass of the embodiment of the present invention is used, the preform for polishing processing is formed. Grinding and grinding, and processing into a shape of a lens and a prism. Further, the optical preform of the embodiment of the present invention is used to form a preform for precision press molding, and the preform for precision press molding is subjected to precision press forming processing. The shape of the lens and the crucible can be processed into various lenses and shapes in either case. [Simplified illustration of the drawing] Fig. 1 shows the partial dispersion ratio (0g, F) as the vertical axis and the Abbe number. (vd) is a diagram of the regular line shown on the orthogonal coordinates of the horizontal axis. 163027.doc -28 -

Claims (1)

201247586 VII. Patent application scope: 1. An optical glass containing P5+, A13- and Mg2+ as a cationic component 'containing 〇2· and F- as an anion component, and Mg2+ content (cation %) and Ca 2+ content (cation %) The total content of the alkaline earth metal (R2+··cation ratio ((Mg2++Ca2+)/R2+) is 〇, 25 or more, and the abrasion degree is 440 or less. 2. Optical glass according to claim 1 The ratio of the Mg2+ content (% of the cation) to the total content of the alkaline earth metal (r2+: cation%) (Mg2+/R2+) is 0.30 or more. 3. The optical glass of claim 1 or 2, wherein the refractive index ( Nd) is 1.50 to 1.60 'Abbe number (Vd) is 60 to 80. 4. The optical glass according to any one of claims 1 to 3, wherein a partial dispersion ratio (9g, F) is 0.530 or more. The optical glass of any one of claims 1 to 4, wherein the content of p5 + is 20 to 55%, and the content of Al 3 + is 5 to 20%, and the content of Mg2+ is expressed by % of cation (% by mole). The rate is 1.1~30%, the content of Ca2+ is 〇.1~30%, and the content of Sr2+ is 〇~20%. The content of Ba2+ is 0.^25%, the content of R2+ is 30 to 70%, and the content of Zn2+ is 〇15%, 163027.doc 201247586 is expressed as anion% (% by mole), and the content of F· The ratio is 20 to 70 〇 / 〇. 6. An optical element comprising the optical glass of any one of the claims (1). 7. A preform comprising the item of any one of claims 5 to 5 The optical glass is used for polishing processing and/or precision press molding. 8. An optical element obtained by precisely pressing the preform of claim 7 163027.doc