TW200921140A - Manufacturing method of optical element - Google Patents

Abstract

The present invention utilizes a cheap member conventionally used for plastic molding to carry out precision press molding, thereby greatly reduce the manufacturing cost of an optical element. The present invention provides a manufacturing method of optical element, which is characterized in: using a mold made of surface film-formed steel (including stainless steel) and/or a copper alloy, so as to carry out the precision pressing molding towards a glass-perform which essentially contains a TeO2 component and/or a Bi2O3 component. Preferably, the above-mentioned surface film contains at least one selected from the group consisting of Ni, Cr and Co, together with either or both of P and B.

Description

200921140 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION One invention relates to a method for manufacturing an optical element having high optical constant required in the field of optics at low cost. [Prior Art] - In the field of optical equipment such as digital cameras or projectors, it has become a problem to reduce the size and size of optical components and reduce the number of lenses used. f through f' constitutes a lens like an optical lens with a spherical lens and an aspherical lens. Most spherical lenses are manufactured by cold working (grinding, grinding, etc.) the glass material, or by cold working the glass forming xm obtained by reheat pressing. On the other hand, for aspherical lenses, manufacturing by precision press forming has become the mainstream, and the precision press forming is as follows. A mold having a high-precision forming surface is used to heat the softened spherical, elliptical or flat The preform is press-formed, and the shape of the two-precision forming surface of the mold is transferred to the preform to obtain an aspherical lens. When a glass molded article such as an aspherical lens is obtained by precision press forming, in order to transfer the high-precision forming surface of the mold to the glass preform, it is necessary to press the heated and softened preform in a warm environment. . Therefore, the mold used at this time is also exposed to a high temperature, and a gentle "South pressing pressure is applied to the mold. As a result, when the preform is heated and softened and pressed, in many cases, the release film provided on the molding surface of the mold is damaged and the high-precision molding surface of the mold cannot be maintained, and the mold itself is also 133,673.doc 200921140 Easy to damage. In this case, the mold has to be replaced, and as a result, the number of replacements of the mold is increased, so that low-cost, mass production cannot be achieved. Therefore, the glass which is a raw material of the preform used for the precision press molding is considered to have the above-mentioned damage, maintain the high-precision molding surface of the mold for a long period of time, and realize the precision press forming under the low-pressure pressure. It is desirable for the glass to have as low a glass transition temperature (Tg) as possible. In general, since the mold used for precision press forming of an optical glass material has high heat resistance and high strength, it is produced by using a super hard metal such as tungsten carbide, a metal ceramic, a carbonized stone, or a crystallized glass material. Further, in order to prevent the mold from being fused with the glass, to improve the mold release property, and to extend the life of the mold, a surface film (release film) is provided on the molding surface of the mold. As the surface film, various kinds of films are known, and noble metal ruthenium such as platinum, rhodium, ruthenium, palladium, iridium, etc., diamond-like carbon (DLC, diam〇nd Uke carb〇n), and tetrahedral amorphous carbon (TAC) are known. A carbon film such as a nitride film such as chromium nitride or titanium nitride. Further, in order to prevent deterioration caused by oxidation of the mold film, precision press molding is often performed in a non-oxidizing atmosphere. As such, in general, in order to precisely press the optical glass, special parts and conditions are often required. Therefore, there is a problem that the cost becomes high. In particular, the mountain has been used as a mold for precision press forming of optical glass, and it has been made into a super-hard alloy such as a slain crane.

The machining of the trapped seam, J must be formed by the grinding of the diamond grinding wheel. However, the diamond grinding wheel itself will wear out, and the high-precision machining, the formation of the surface shape is difficult, in order to meet the requirements of the optical component 133673 .doc 200921140 requires very long processing time and labor. Work! It is known that steel materials such as steel and stainless steel are used, and materials which are easy to perform high-precision mold processing without using the above-mentioned labor-intensive grinding processing and cutting processing are known. ^ ^ The mold is mainly used as a molding material for injection molding of plastic lenses, which is considered to be a relatively inexpensive material. However, in stainless steel or the like, the temperature necessary for the shape of the glass, for example, at a high temperature of, for example, is easily deformed, and i, if a stainless steel mold is used. At a high temperature of C or higher, the surface of the mold is roughened and embrittled due to oxidation or the like, and therefore, the mold for precision press forming is not used. X, for the residual steel mold, Lu's sometimes has insufficient hardness to waste the glass, and sometimes deforms when the glass is pressed at a high temperature. In this way, in order to use the inexpensive member used for plastic lens molding, the precision pressing of the optical glass is carried out, and the number of materials and materials is too large, and it is impossible to put it into practical use. Further, in the market of optical glass, in order to simplify the optical system, the demand for a high refractive index glass having a refractive index (nd) of about 2.0 is high. Moreover, there are many cases in which the glass of the field is used as an aspherical lens, and various studies are being conducted to reduce the cost of the lens production. For example, a method of press forming a glass material containing Te is disclosed in Japanese Laid-Open Patent Publication No. 2003-48723 (Patent Document 1). [Patent Document 1] Japanese Patent Laid-Open Publication No. 2003-48723 [Draft of the Invention] [Problems to be Solved by the Invention] However, in the steps disclosed in Patent Document 1, a carbonized crane or a pottery 133673.doc 200921140 is used as a model 3 The glass is press-formed, so the cost of the material of the mold or its processing requires a very long time and labor for processing to meet the precision required for the optical component. [Technical means for solving the problem] The present inventors have found the following manufacturing method, which solves the problem of the prior art, that is, using an inexpensive member used in the prior plastic molding, it is possible to increase the demand as an optical element. In the above, the Abbe number (the glass in which the sentence is 15 or more is subjected to precision press molding, thereby greatly reducing the manufacturing cost of the optical element. That is, the inventors have found the following method: the composition is adjusted to have An optical glass preform which can be subjected to pressing (such as glass transfer point, deformation point, etc.) and a large optical constant required by using stainless steel or the like, combined with a pressed mold material and a mold film suitable for the preform The first embodiment of the present invention is a method for producing an optical element, which is characterized in that steel (including stainless steel) formed with a surface film and/or is used. A molding die made of a copper alloy is subjected to precision press molding of a glass preform which must contain a component of Te02 and/or a component of 丨203. The second aspect of the invention, wherein the surface film contains "one or more selected from the group consisting of Ni, Cr, and Co" and "either P or B" or both. According to a third aspect of the invention, in the surface film, the ratio of "the total amount (% by mass) of Ni, Cr, and Co" to the total amount (% by mass) of bis and b in the surface film is 85. The manufacturing method of any one of the above-mentioned structures, wherein the surface film has a hardness of 2 〇〇 (Hv) or more and a thickness of 135 673. The fifth aspect of the present invention, wherein the organic material powder, the carbon powder, or the ceramic is dispersed in the surface film. The sixth aspect of the present invention is the fifth aspect of the present invention. The manufacturing method of the above configuration 5, wherein an intermediate layer is provided between the molding die and the surface film.

The seventh aspect of the present invention, wherein the method of any one of the above-mentioned configurations 1 to 6, wherein the molding is carried out at 400 ° C or lower. The eighth aspect of the present invention, wherein the glass preform comprises an optical glass having a refractive index (nd) of 1.9 or more and an Abbe number of 0 to 15 As described above, the glass transition point (Tg) is 300 ° C or less, and does not contain the Ru and/or As components, and contains 5 〇m 〇 1% or more of the Te 〇 2 component. According to a ninth aspect of the present invention, in the manufacturing method of the above aspect 8, the glass preform comprises an optical glass comprising a ruler (11 is one or more selected from the group consisting of u, Na, K, and Cs) The component, the zn〇 component, and the Bi2〇3 component' further contain Ai2〇3 and/or Ga2〇3 components. According to a tenth aspect of the invention, the method of the present invention, wherein the glass preform comprises the optical glass, which is based on mol% of the oxide, and comprises

Te02 50-90% ' R2〇 (R is selected from a group consisting of Li, Na, K and Cs on 133673.doc -10- 200921140) 5~30%,

The components of ZnO B12O3. 1 to 30% and 1 to 20% of the invention, wherein the glass preform comprises the following optical glass: mol based on an oxide. /. In addition, it additionally contains 0·01 to 3.0 m〇1% of Al2〇3 and/or Ga2〇3 components. The twelfth aspect of the present invention, wherein the glass preform comprises the following optical glass: powder = water resistance is 1st, 2nd or 3rd. The manufacturing method according to any one of the above-mentioned items 8 to 12, wherein the glass preform comprises an optical glass containing B203, Ge〇2, and Ρ2〇5 components based on an oxygen substance. The total rate is $ (9) or less. A fourteenth aspect of the invention, wherein the glass preform comprises the following optical glass: R2 〇: a component comprising Li20 and/or Na20. A fifteenth aspect of the invention, wherein the glass preform comprises the following optical glass: substantially no F component. The manufacturing method of any one of the above-mentioned structures 8 to 15, wherein the glass preform comprises the following optical glass: 133673.doc 0-10% '〇 based on the mol% of the vapor reference ~3 0% ' 0-20% > 0-15% ' 0-10% > 0-10% > 0-20% > 0-20% ' 0-20% > 0-10% &gt 〇~10%, 〇~10%, 0~10%, 0-10% > 0-10% > 〇~10%, 〇~10%, 〇~10%, 0-0.5%

200921140 si〇2

Li2〇

Na2〇 K20

Cs20

MgO

CaO

BaO

SrO

Ti02

Nb205

Ta2〇5 W〇3

Zr02 Y2O3

Yb2〇3 L&2〇3

Gd2〇3

Each component of Sb2〇3 is an optional component. The seventeenth aspect of the present invention is the method of any one of the above-mentioned configurations 8 to 16 wherein the glass preform comprises the following optically-infrared Yb2〇3, La2〇3, and Gd2〇3 components in a total amount of less than 1 〇 [invention And / / / and / or / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / Or/or and/or the manufacturer: Y2〇3 ' mol%. 133673 .dee -12- 200921140 According to the manufacturing method of the present invention, a member which can be used for plastic molding can be used, so that an optical element of a high refractive index field which is required in a very high demand can be mass-produced inexpensively. [Embodiment] Hereinafter, a manufacturing method of the present invention will be described. (forming die)

The molding die used in the production method of the present invention is not particularly limited as long as it does not undergo deformation at a molding temperature suitable for precision press molding, and is hereinafter referred to as a glass preform which is a molded article to be described below. It is preferable to use an inexpensive mold which can be used for molding, such as a plastic lens, for the purpose of the present invention which is 35 〇 1 or less and which is intended to reduce the manufacturing cost as much as possible. The mold material used in the production method of the present invention preferably does not require a high cost method for grinding and/or grinding of the diamond grinding wheel, but benefits: an inexpensive grinding process can form the surface with high precision. shape. Specifically, α, it is preferable to use a steel material (including stainless steel) and/or a copper alloy as a main component, and it is more preferable to use steel (including not), and it is preferable to use non-ferrous steel as a molding material. Here, as a user of steel, for example, steel, prayers, stainless steel, stainless steel, iron, stainless steel, precipitation hardened stainless steel, etc., as copper ports, users can use copper as a main component. Known alloys. In the molding die of the present invention, it is preferable to protect the life of the forming die by the load such as heat or pressure when the molding material is not formed, and to improve the mold release property, preferably 133673.doc 13 200921140 :: Special surface flaws. Here, in order to carry out the (four) (four) forming of the glass used in the present invention, it is preferred to use a material having a hardness of 200 Hv or more as the surface film, and more preferably (4) Η (4) is 300 Η ν or more. The Vickers hardness in the present invention is such that the sample load is 9·8 〇7 福, and the measurement conditions are measured based on JISZ 2244. ', The thickness of the surface film is not particularly limited as long as it can protect the base material from various loads during the fine (4) system and does not fuse with the preform. However, it is preferable to have a thickness to the extent that the surface of the film is deteriorated when a plurality of dusts are formed. # A new molding surface can be easily formed by re-grinding. By realizing such a simple regeneration, the steps that are necessary can be omitted, which contributes to the overall cost reduction of the manufacturing steps. In view of this, the above-mentioned surface film has a thickness of 0.5 (four) or more, and more preferably, the above is preferably more than 5 μηι. In order to form a film having hardness, heat resistance, mold release property, and thickness as described above, it is preferable to contain "a type selected from the group consisting of Ni and CaC" and "in P and B". Either or both" are constituent components of the film. X, considering the chemical reactivity with the constituents of the following preforms, (Ni, 〇, α) _ (Ρ, 咐 surface film is also an excellent film. In the above (Ni, Cr, Co) _ ( P, Β) in the surface film, Ruochuan,

When the content of Co is too large, the corrosion resistance is lowered and the life of the film is liable to be shortened. When the content of p or B is too large, the hardness is lowered and the deformation is easily caused. Therefore, considering the ratio of the total amount (% by mass) of the chemical reactivity 'rNi 'Cr&c〇' to the Te〇2-based optical glass and the total amount (% by mass of P), it is preferable. Is adjusted to 133673.doc -14- 200921140 The best is 85: 15~99: i range, better is %: 14~98: 2, 87: 13~97: 3. The surface film of the forming mold has no special grade, and it is better to use ion plating method, sputtering method, dry type 丨 丨 朴 朴 用 用 用 干 干 干 干 干 干 热 热 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 朴 _ _ _ _ _ Depositi〇n, chemical vapor deposition)

Phy(10)! A well-known method such as a Vapor Depositi〇n, physical vapor deposition method, or electrolytic ore method. Particularly preferably, it is electroless (tetra) I... In order to improve the corrosion resistance and/or mold release property of the film, the additive may be dispersed in the film. For example, it is also possible to disperse the powder of the tetrakis, ethylene, etc., the stone of the carbon, etc., and the ceramics of SiC, etc. It is preferable to provide an intermediate layer obtained from a known film mainly composed of Ni Cf and c. The formed film formed by the above method may be processed by film formation after film formation. The heat treatment is not meant to be carried out by a known method, and it can be carried out by a known method. In the present invention, other films may be used or used as a multilayer film, and the metal film is And a well-known film of iron, ingot, copper, etc., and a diamond-like film (DLC) or a tetrahedral carbon film (TAC) which is insufficient in hardness to shape the above-described preform of the present invention. It is difficult for the carbon-based film J to have a thickness of a specific value or more. Therefore, it is difficult to use as a surface flaw of a molding die used in the production method of the present invention. (Precision press molding conditions) In the method of the present invention, the preform system is The forming mold is subjected to pressure forming.士 _ 之 之 可 可 可 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 133 For example, after the preform is supplied between a pair of upper and lower molds, the mold and the preform are heated and heated to a temperature corresponding to a glass viscosity of 1〇8 to 1〇12 poise. The preform is heated and softened and press-formed to thereby 'transfer the molding surface of the mold to the preform to obtain a glass molded body. In the forming method, the forming mold and the preform are subjected to isothermal conditions. After heating, the preform is press-formed, and then the forming mold and the glass molded body are cooled. Therefore, no dents are formed on the glass formed body, and good surface precision can be obtained, but the temperature of the forming mold is high, and thus The adhesion time of the glass is long. Therefore, the release film is liable to be damaged. Therefore, the molding time of the molding die can be shortened by the following method. To the preform: a pair of upper and lower molds are previously heated to a temperature corresponding to a glass viscosity of 1〇8 to 1〇12 poise, and the preform is heated to the same temperature as the upper mold and the lower mold. Supplying between the upper mold and the lower mold, and performing pressure forming thereof; or feeding the preform heated to the upper mold and the lower mold to a pre-heating temperature to a glass viscosity i 08~丨〇12 poise The pair of upper molds and the lower molds of the corresponding temperatures are immediately press-formed. According to the above method, the damage of the surface film can be reduced. Further, the preforms used in the present invention described below are used. In the case of the case, the forming temperature is preferably set to 400 t or less, more preferably 390. (: The following 'best is 380 ° C or less. In order to reduce the deterioration of the surface film of the forming mold, the environment at the time of press forming 133673 .doc -16- 200921140 Non-oxygen t-environment. As the non-oxidizing environment, a gas or a helium-milk inert gas, a hydrogen gas, a gas channel, a reducing gas, or the like may be used. It is preferable to use a nitrogen gas and a small amount of helium. Nitrogen. Add pressure and time to go to # & consider the viscosity of the glass, etc., such as 'can use a non-recording steel mold with an inner diameter of 5~2〇^, pressurize 30~300耖 with a pressure of 4~20 MPa * After the L, and after the 'molding mold and the glass preform, it is preferable to demold the mold when the degree of progress is below, and take out the formed glass molded body. Pressure hede

— The cooling of the molded product after the I can be released after the negative pressure is released, or it can be cooled by pressure-surface. (Precision of preforms for press molding) /, A preform for precision waste forming which is pressed in the production method of the present invention will be described. It is preferable that the optical glass used in the manufacturing method of the present invention has a core of 19 or more and a turn of 15 or more in consideration of optical design requirements. Previously, A used a glass having various compositions to realize the optical constant, and although both satisfy the optical constant, the Tg is mostly exceeded. c, there is a problem in that an inexpensive material such as stainless steel cannot be used in precision press forming, and the cost is increased. In the present invention, the optical glass requires a lower Tg than the known ones. Therefore, it is preferred that the Tg is preferably 35 (rc or less, more preferably 33{rc or less, 3 〇〇t: Further, if the chemical durability is poor, it is difficult to use it as an optical glass. Therefore, if the optical glass of the present invention is used as a lens preform, it is preferable that the standard of the optical glass industry standard: J〇GIS〇 The evaluation of the water resistance of the powder method specified in 6_1999 is preferably 1 to 3, more preferably 〖~2, the most ^ I33673.doc 200921140 is level 1. Also 'to satisfy the above optical constant, Tg, durability The composition of the optical glass such as the property is the sum of the (4) compound standard and the coffee 3 as the main component. Even if the (Ni, Cr, Co) _ (P, B)-based surface film or the mold material in the present manufacturing method is specifically considered The above-mentioned composition also has excellent reactivity. The reason for limiting the range of each component as described above in the optical glass of the present invention is described below. Hereinafter, unless otherwise specified, the composition of the glass is as described above. The content of all is based on oxide In the present specification, the term "oxide-based" refers to the quality of the oxide formed when the oxide or nitrate of the raw material of the glass component is decomposed and converted into an oxide. The sum is set to 1 〇〇 mol%, which indicates the composition of each component contained in the glass.

The Te〇2 component has a component forming an effect of glass and must be contained in the present invention. However, if the amount is too small, it is difficult to form glass, and if it is excessively contained, the glass tends to become unstable, which is disadvantageous. Therefore, in the present invention, it is preferred to set 50% as the lower limit, more preferably 55% as the lower limit, and most preferably 60% as the lower limit, and it is preferable to set 9% to the upper limit. It is better to set 85% as the upper limit, and the best is to set 8〇% as the upper limit. The Κ·2 〇 component (R is a group selected from the group consisting of Li, Na, K, and Cs) has any effect of facilitating vitrification of the Te〇2 component and keeping the Tg low. The ingredients are useful ingredients in the present invention. However, if the amount is too small, it tends to be insufficient to form a glass. If the content is left over by 133673.doc -18-200921140, the refractive index is liable to decrease, and the devitrification property is likely to increase. Therefore, in the present invention, the total amount of the R 2 〇 component is preferably 5% to the lower limit, more preferably 7% to the lower limit, and most preferably 10% = the lower limit, and preferably It is better to set 3G% as the upper limit, and it is better to set the coffee as the upper limit. The best is to set 25% as the upper limit. 0 Next, the components of R2〇 are described. (10) The component has an optional component which makes it easy to vitrify the component (10) and has a low effect of τ:. However, if it is excessively contained, the refractive index is liable to decrease, and the devitrification property is liable to increase, which is disadvantageous. The content of the u2 bismuth component in the present invention may be G%, but it is preferred to set 1% as the lower limit. /. It is preferable to set the lower limit ′ to set the lower limit to 5%%, and it is preferable to set 30% as the upper limit, and it is more preferable to set the upper limit of 27% to the upper limit. The component has an optional component which makes it easy to vitrify the Te〇2 component and maintains a lower effect. However, if it is contained excessively, the refractive index is liable to be lowered, and X is degraded in the devitrification property, which is disadvantageous, and therefore may not be contained. The content of the Na20 component in the present invention is preferably such that the enthalpy is set to the upper limit. More preferably, 17% is made the upper limit, and most preferably 15%. The /2 〇 component is an optional component which has an effect of facilitating vitrification of the Te 〇 2 component and (4) maintaining the enthalpy. However, if it is contained excessively, the refractive index is liable to decrease, and the devitrification property is liable to increase, which is disadvantageous, and therefore may not be contained. In the present invention, the content of the 'K2° component is preferably 15% as the upper limit, more preferably 13% as the upper limit, and most preferably 1%% as the upper 133673.doc •19·200921140 limit . The eight S2 分 具有 具有 具有 具有 具有 具有 具有 具有 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 It may or may not be included. In the present invention, the Cs20 component preferably has an imaginary % as an upper limit, more preferably an upper limit, and most preferably 3% as an upper limit.

Further, it is preferable that Han 2〇 contains either or both of LbO and NhO components. The reason for this is that the other R 2 (10) component is more likely to be deteriorated in relative devitrification than the Li 2 〇 ^ Na 2 〇 component.

The ZnO component is an optional component which has an effect of facilitating vitrification of the component (10), and is a useful component in the present invention. Then, if the amount is too small, the glass tends to be unstable, and if it is excessively contained, the devitrification property is likely to increase, or the refractive index is likely to be lowered or the Tg is likely to be high, which is disadvantageous. Therefore, it may be G% in the present invention, but it is preferred to set the money as the lower limit, more preferably 2% as the lower limit, and most preferably 3% as the lower limit, and preferably 3〇 % is set to the upper limit. It is better to set 27% as the upper limit. The best is to set the move to the upper limit. The Βι2ο3 component has an effect of facilitating vitrification of the Te〇2 component and increasing the refractive index. In the invention, if the amount of the component H is too small, the glass tends to be unstable, and if it is excessively contained, the devitrification property is likely to increase. Moreover, Tg tends to become high, which is disadvantageous. s may be 0% in the present invention, but it is preferred to set 1% as the lower limit, more preferably 2% as the lower limit, and most preferably 3% as the lower limit, and preferably It is better to set 鸠 to the upper limit, and it is better to set 17% as the upper limit. It is best to set 15% to the upper limit of J33673.doc -20- 200921140.

The Al2〇3 and Ga2〇3 components are all optional components which have the effect of suppressing the devitrification of the glass, and it is preferable to contain any of them. However, if the effect of suppressing the devitrification of the 乂丨 is not sufficient, if it is excessively contained, the devitrification property is likely to increase, and it is disadvantageous that the refractive index is lowered or the Tg is increased. Therefore, in the present invention, the total content of the components of θ 4 Α 12 〇 3 and Ga 2 〇 3 is preferably set to 0.01% as the lower limit, and more preferably

〇.〇5% is set as the lower limit, and the best is to set (4) as the lower limit, and it is better to set 3: "to the upper limit, and it is better to set 2.0% as the upper limit, and it is better to set 1- 0% is set as the upper limit. "Additional" refers to Al2〇3 when ai2o3 and the total content is 1%%. In addition, in this specification, "the oxide component except Ga203 component and the relative mol0 of Ga2〇3 component" For each component, the Al2〇3 component preferably has 2〇% as the upper limit, and the other 1.51.5/〇7 is the upper limit, and it is preferable to set the genus to the upper limit. It is good to set 2.〇% as the upper limit, and it is better to set 15% as the upper limit. The best is to set 丨.0% as the upper limit. However, the 'Qiu 2 component can be used in the optical glass of the present invention. Although it functions as a glass-forming oxide, it is very difficult to carry out vitrification alone. Therefore, it is preferable to contain the above-mentioned components (that is, one of ΙΟ, -, and Bi2〇3 into a knife and one of Al2〇3&Ga2〇3 components. At least one or more of the above or both, and by further containing the Ding EO2 component and the components, it is easy to obtain more excellent Qualitative, solubility, chemical durability, glass as a property of optical glass. 133673.doc •21 · 200921140 B2〇3, Ge〇2 and Ρζ〇5 components reduce the refractive index and increase the composition of Tg' The amount is preferably 5% as the upper limit, more preferably the upper limit, and most preferably 1% as the upper limit. However, none of them are included. 3 About ΙΟ;, Ge〇2 and ho5 The composition is preferably 5% as the upper limit, more preferably 3% as the upper limit, and most preferably 丨^ as the upper limit. The F component is a component which is easy to increase the devitrification property. Therefore, it is preferably 疋5/., more preferably 2%, which is preferably not contained. Further, the content of F in the present invention means an oxide which constitutes part or all of the glass of the present invention. The total amount of F after fluoride replacement is 1% based on the above-mentioned oxide standard composition, and is expressed as m〇1% when calculated as F atom. 3: 〇2 component has improved devitrification The ingredient of the sexual effect is therefore tolerable in this month. However, if it is excessively contained, the devitrification is likely to increase. Further, the refractive index is liable to decrease and tends to become high, so that it is disadvantageous that it is mid-month, and it is preferable to set 1G% as the upper limit, more preferably 5% as the upper limit, and most preferably 2%. The upper limit.

The Mg 〇 component is arbitrarily contained in the improvement of devitrification. "Therefore, in the present invention, the right side is excessively contained, the devitrification property is likely to increase, the refractive index is likely to decrease, and the Tg is likely to be high. Therefore, X 41 is preferable in the present invention. Shangyang, ^ is set as the upper limit, and it is better to set 5% ''''. The best is to set 2% as the upper limit. The 〇成刀系 has the effect of improving the devitrification effect, so in this hair 133673.doc -22- 200921140 It can be arbitrarily contained in the Ming Dynasty. However, if it is excessively added, the refractive index is liable to decrease and _ is easy to become high == It is easy to increase to /t, which is 2%% as the upper limit. It is good to set 7% as the limit, and it is best to set 5% as the upper limit. The component of the effect of good devitrification is therefore added to the present invention, and the second is excessively contained, the devitrification property is easily increased by the present invention. In the middle, it is easy to become high, which is disadvantageous. Therefore, it is preferable to set the upper limit to be the upper limit, and it is better to set 7% as the upper limit, and it is preferable to set the upper limit to 5%. Ren Biao has a component that has the effect of changing: the effect of devitrification, so it is added to the present, and secondly, if it is excessively contained, the devitrification is easy to increase. However, it is disadvantageous to become high, which is disadvantageous. Therefore, in the invention, it is preferable to set 20% as the upper limit as the upper limit, and it is preferable to set the upper limit to 5%. The middle of the Ming Dynasty can be arbitrarily contained. In the autumn, the fruit is a knife, so in this hair, Ding Dan is easy to fall in love with one..., and the right excess contains the devitrification, which is easy to increase and easy to change, which is unfavorable. Because (10) Set to the upper limit, more ^ θ 赞 中 中 中 疋 疋 - better ... set the upper limit, the best is to

The Nb2〇5 component is improved and can be optionally contained in the invention. The ingredient that lacks the effect is therefore increased in this way, (10) is easy to become high, and from the second point: if it is excessively contained, the devitrification is easy to set (4) as the upper limit and more. Therefore, in the present invention, a preferred 5% is set as an upper limit. The more... the upper limit, the best is 133673.doc -23· 200921140

Since the Ta205 component has a component for improving the refractive index, it can be arbitrarily used in this month. However, if it is excessively contained, the devitrification property tends to increase, and the Tg Valley is easily changed, which is disadvantageous. Therefore, in the towel of the present invention, it is preferred to set (10) as the upper limit, more preferably 7% as the upper limit, and most 〇/〇 as the upper limit. Since the W〇3 component is a component having an effect of increasing the refractive index, it can be optionally contained in the present invention. However, if it is excessively contained, the devitrification property tends to increase, and "Tg tends to become high", which is disadvantageous. Therefore, in the present invention, it is preferable to set 10% as the upper limit and better ? as the upper limit. More preferably, 疋 is set to an upper limit, and it is preferable to have a component having an effect of improving chemical durability in a wide range of components, and therefore it can be arbitrarily contained in the present invention.钬和—, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Therefore, in the present invention, the light cup is set to an upper limit of 1%, and more preferably, the upper limit is the best. Will be 2. /. Set to the upper limit. The 疋 〇 〇 3 component is a component having an effect of improving chemical durability, and can be optionally contained in the present invention. The narrowness is easy to increase, and the Tg tends to become high. From: Excessively contained, the devitrification capacity is set to 10% as the upper limit, and more preferably 5% is set as the upper limit. More preferably, 7% is set as the upper limit, and it is preferable that the ingredients of the 〇3 component have an effect of increasing the refractive index. The invention can be arbitrarily contained. Lack of this ..., if the excess contains, then the devitrification capacity # is easy to become high, which is unfavorable. Therefore, in the present invention, the ratio = is 10 〇 /. Set to the upper limit, better 丫 Better 灵 疋 Set 7% as the upper limit, and the best is to set 133673.doc •24- 200921140 5 % as the upper limit. When the component of the effect of the refractive index is increased, Tg is likely to change, and if it is excessively contained, the devitrification property is likely to be 10% as the upper limit, and more preferably θ. In the present invention, a preferable 5% is set. Upper limit. , 疋, %s is the upper limit, the best is

The Gd203 component is arbitrarily contained in the invention having an increased refractive index. ^ 4 ^ ϋ在于本

When it is increased, Tg tends to become high, and if it is excessively contained from n'f right, the devitrification property is easy to be 1 〇. ~ Unfavorable. Therefore, in the present invention, a preferred niobium is set to an upper limit of 10%, and more preferably, /0δ is an upper limit, and it is preferable to form a rare earth oxide of tantalum (tetra), Yb203, La203, and Gd203 into a knife. The system has any component that has an effect of improving chemical durability and increasing the refractive index. However, if these components are excessively contained, the devitrification property tends to increase, and the Tg tends to become high, which is disadvantageous. Therefore, in the present invention, the amount

It is preferable to set 1〇% as the upper limit, more preferably 7% as the upper limit, and it is preferable to set 5°/❶ as the upper limit.

Since the ShO3 component is a component having an effect of clarifying action, it can be optionally contained in the present invention. However, if it is excessively contained, the devitrification property tends to increase, and "Tg tends to become high", which is disadvantageous. Therefore, in the present invention, it is preferred to set 0.5% as the upper limit, more preferably to set the upper limit of 〇4%, and it is preferable to set the upper limit of 〇·3%. Next, the components which should not be contained in the optical glass of the present invention will be described. 133673.doc •25· 200921140 The wrong compound is a component that is easy to fuse with the mold during precision press molding, and it is necessary to take environmental measures not only in the manufacturing process of glass but also in the cold processing of glass such as polishing and the disposal of glass. It is a component having a large environmental burden, and since the lead compound has the above problems, it should not be contained in the optical glass of the present invention.

As2〇3, cadmium, and toe components all have harmful effects on the environment, and the environment is very burdensome. Therefore, the optical glass of the present invention should not contain 0 r.

Further, in the optical glass of the present invention, V, Cr, Mn, Fe, Cq, Ni, Cu, Mo, Eu, Nd, Sm, Tb, Dy, and the like are easily colored to lower the light transmittance, which is preferable. It is not actually contained. Here is. It is excluded from the case where it is mixed as an impurity, meaning it is not artificially contained. The composition of the glass composition of the present invention is expressed by mol%, so that it is not possible to directly change the nose to the content of the mass %, but the components present in the glass composition satisfying the characteristics required in the present invention are The composition represented by mass % is approximately the following value based on the oxide-based composition.

Te〇2 40 to 90%, R2〇 (R is one selected from the group consisting of Li, Na, K, and Cs) 5 to 30%,

Zn〇

Bi2〇3 1 to 50%, and additionally 0.005 to 3.0% of Al2〇3 and/or Ga203, and B203, Ge02 and P205 0-5% ' 133673.doc -26- 200921140 ί

SiO 2 0 to 10%, and/or Li 20 0 to 10%, and/or Na 2 〇 0 to 10%, and/or κ 2 ο 0 to 10%, and/or MgO 0 to 5%, and/or CaO 0 to 20 %, and/or BaO 0~20%, and/or SrO 0~20%, and/or Ti02 0~5%, and/or Nb2〇5 0~20%, and/or Ta2〇5 0~25% And/or W03 0~15%, and/or Zr02 0~5%, and/or Y2〇3 0~15%, and/or Yb203 0~25%, and/or La2〇3 0~20%, And/or Gd2〇3 0 to 10%, and/or Sb2〇3 0 to 2% 实施 [Examples] The present invention will be described in detail based on the following examples, but the present invention is not limited thereto. (Example 1) A glass preform comprising an optical glass containing 65% of a Te02 component, 20% of a Li20 component, and 133673.doc -27-200921140 10% of a ZnO component, on the basis of an oxide, was prepared. 5% of the Bi203 component, and additionally contains 〇2. /0

AhO3 ingredients. The preform had a refractive index of 2.〇3, an Abbe number of 191, and a glass transition temperature of 270. (: The shape of the preform was a spherical preform having a diameter of 72 mm. The preform was precisely press-formed by the method shown below, thereby producing a profile of 10 mm and a center thickness of 3·3 mm. A lenticular optical lens. A stainless steel mold (SUS420J2 equivalent, hardness 580 Hv) manufactured by STAVAX Co., Ltd. was used as a molding material for a forming mold. The stainless steel molding material was ground by 'interposing an intermediate layer formed of Ni-P thereon. (Ni : ρ == 9 〇: 1 〇) Then, a Ni-P film (Ni : Ρ = 90 : 10) containing about 30% by volume of polytetrafluoroethylene particles was formed by electroless plating. The thickness of the molding machine is M02C manufactured by Toshiba Machine Co., Ltd. The glass preform is kept at room temperature and supplied to the above-mentioned forming mold having an inner diameter of 1〇4 mm in a nitrogen atmosphere. , heated to 297. 匚 and pressurized at 20 MPa for 60 seconds. Thereafter, the cooling rate of a_2 2 〇 c / s was gradually cooled while continuing to pressurize for 12 seconds at a pressure of 1 〇MPai, when the glass formed body After the temperature drops to 5 (TC or less, take out the glass into After the sigma step 'continuously performing the press forming using the same forming die, the glass molded body did not have protrusions or cracks. Moreover, the surface film of the forming mold did not cause problems such as fusion or white turbidity. Example 2) Ni_133673.doc -28- 200921140 p_b film (Ni m8 m5) was formed on the ground stainless steel mold by electroless plating. Other conditions were the same as in the example, using the same-forming mold After 1000 press moldings were continuously performed, the glass molded body was free from protrusions and cracks, and the surface film of the molding die did not cause problems such as fusion or white turbidity. (Comparative Example)

A superhard mold is used as a molding material for the forming mold. A film containing Pt as a main component was formed on the superhard mold by a vacuum evaporation method. The film thickness was 〇 5 μιη. The molding machine for precision press forming uses the M02C machine manufactured by Toshiba Machine Co., Ltd. The glass preform was kept at room temperature and supplied to the above-mentioned molding die having an inner diameter of 10.4 mm, and heated to 327 ° C in a nitrogen atmosphere and pressurized at a pressure of 1 MPa for 80 seconds. Thereafter, the film was gradually cooled at a cooling rate of -2.2 ° C / s and further pressurized at a pressure of 10 MPa for 12 seconds. After the temperature of the glass formed body was lowered to 50 ° C or lower, the glass formed body was taken out. In this step, the glass is fused with the forming mold so that the forming cannot be repeated.

133673.doc 29-

Claims (1)

200921140 X. Patent application scope: 1. A method for manufacturing an optical element, characterized in that a forming mold made of steel (including stainless steel) and/or a copper alloy formed with a surface film has a Te02 component for the shoulder 3 and / Or a glass preform of 2 〇 3 components for precision press forming. 2. The method of producing the method of claim 1, wherein the surface film contains "one or more selected from the group consisting of N, Cr, and Co" and "either or both." For example, the ratio of the total amount (沁%, Cr, Cr, and Co (% by mass) of the above surface film to the total amount (mass/〇) of Γρ and b” is 85. : 15 to 99 : 1 range. 4. 5. 6. The method according to any one of claims 1 to 3, wherein the surface film has a hardness of 200 (Hv) or more and a thickness of 〇 5 or more. . The cracking method of the mashed glutinous glutinous rice, the glutinous rice glutinous rice glutinous rice, wherein the organic powder, the carbon powder, or the ceramic is dispersed in the surface film, as in any one of claims 1 to 4. For example, the optical element of claim 5 is ##古,本千千千取! <<_方/去, in which an intermediate layer is provided between the above-mentioned forming mold and the above surface film. 8. In the case of claims 1 to 6, the Ik method of the top-of-the-line method is at 400. 〇Formed below. The method according to any one of claims 1 to 7, wherein the glass preform comprises an optical glass having the following characteristics: a refractive index (nd) of 1.9. The glass transition point (Tg) of the glass and the Abe number )d) is 35 or more. . It does not contain 3 or more of the As component, and contains 5 〇 mol% or more of Te 〇 2 component based on the oxide. The method of claim 8, wherein the glass preform comprises an optical glass containing R 2 〇 (R is one or more selected from the group consisting of Li, Na, K, and Cs). The ZnO component and the Bi203 component further contain Al 2 〇 3 and/or Ga 203 components. 10. The manufacturing method according to claim 8 or 9, wherein the glass preform comprises the following optical glass: containing 50% by weight of the oxime on the basis of the oxide: 50% to 90% &gt; R2 〇 (R is selected from Li And one or more of the group consisting of Na, K, and Cs) each of 5 to 30%, 1 to 30%, and 1 to 20% of ZnO Bi2〇3. 11. The production method according to any one of claims 8 to 10, wherein the glass preform comprises an optical glass having an excess of 0.01 to 3.0 mol based on mol% of the oxide. /. Al2〇3 and/or Ga203 components. 12. The manufacturing method according to any one of claims 8 to 11, wherein the glass preform comprises the following optical glass: the powder method specified in j〇GIS〇6-1999 is of grade 1, grade 2 or grade 3. . The manufacturing method according to any one of claims 8 to 12, wherein the glass preform comprises the following optical glass: the content of B2〇3, Ge〇2, and p2〇5 components in terms of mol% of oxide The total rate is below 5 m〇l%. The production method according to any one of claims 8 to 13, wherein the glass preform comprises an optical glass: the R2 bismuth component comprises a Li20 and/or Na20 component. The manufacturing method according to any one of claims 8 to 14, wherein the glass preform comprises the following optical glass: the content of the F component is 5 mol% or less. The manufacturing method according to any one of claims 8 to 15, wherein the glass preform comprises an optical glass containing 0% to 10%, and/or Li2, based on the mol% of the oxide. 0 to 30%, and/or Na2〇0 to 20%, and/or κ2〇0 to 15°/. And/or Cs2〇0~10%, and/or Mg〇0~10%, and/or Ca〇0~20%, and/or Ba〇0~20%, and/or Sr〇0~20% And/or Ti〇2 0~10%, and/or Nb2〇5 0~10%, and/or Ta2〇S 0~10%, and/or W〇3 0~10%, and/or Zr〇 2 0~10%, and/or Y2〇3 0~10%, and/or Yb2〇3 0~10%, and/or La2〇3 0~10%, and/or Gd2〇3 0~10%, And / or Sb2 〇 3 0-0.5% 133673.doc 200921140 each component as an optional component. The above-mentioned glass pre-Yb 〇 3, La 〇 3 and 1 7. The manufactured article 9 according to any one of claims 8 to 16 includes the following optical glass: Y2〇3, Gd2〇3 component content The total number is less than 1〇mol% c.&lt; i. 133673.doc 200921140 VII. Designated representative map: (1) The representative representative of the case is: (none) (2) The symbol of the representative figure is simple: VIII. If there is a chemical formula, please reveal the chemical formula that best shows the characteristics of the invention: (none) 133673.doc