JP2005241860A - Lens and production method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens used in various kinds of applications such as spectacle lens, contact lens, sport glass, lens of magnifier etc. or optical equipment lens of microscope, camera, telescope and binocular glasses, wherein the impact resistance of the lens is not damaged like a lens with a hard coat layer subjected to surface treatment and the damage mentioned above is not caused by adding and mixing ultraviolet ray absorber, for improvement of lens material consisting of transparent organic polymer material. <P>SOLUTION: Inorganic fine particles are injected and dispersed into a lens body comprising organic polymer material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to lenses used in various applications such as glasses lenses, contact lenses, sports glasses, magnifying lenses, etc., or optical instrument lenses such as microscopes, cameras, telescopes, binoculars, and the like, particularly from transparent organic polymer materials. The present invention relates to compounding for improving the function and characteristics of lens materials.

  In general, inorganic glass was used as a material for lenses used in various applications such as eyeglass lenses, contact lenses, sports glasses, and optical equipment lenses, but it is lighter than glass and molded. Lens materials made of organic polymer materials such as plastics have become widespread for reasons such as good performance and workability, high resistance to cracking and high safety.

  Since plastics are soft and easily damaged, the scratch resistance is improved by providing a hard coat layer with high hardness on the surface of the lens body. In some cases, an antireflection film in which an inorganic substance is deposited is provided on the surface of the hard coat layer for the purpose of preventing surface reflection. Further, a water-repellent film may be provided on the surface of the antireflection film for the purpose of preventing contamination. By such surface processing, the quality of the plastic lens is high.

However, as a problem of such a surface-processed plastic lens, for example, in Patent Document 1 below, “a synthetic resin lens subjected to a surface treatment of a hard coat layer or an antireflection film is not subjected to any surface treatment. Compared to a lens made of synthetic resin, the impact resistance (in terms of physical properties) is weak, cracks may occur due to thermal shock, and the coating layer is susceptible to cracking. Is also heavier and the feeling of use of the glasses is reduced ”([0004] of the specification).
JP 2004-13127 A

On the other hand, in the case of eyeglass lenses such as eyeglass lenses and contact lenses, it is reported in Patent Document 2 and Patent Document 3 below that ultraviolet rays contained in intense sunlight cause corneal damage, crystalline lens damage, and retinal light damage. In addition, as means for protecting eyes from ultraviolet rays, means for adding and kneading an ultraviolet absorbent to a resin of a lens material are disclosed. There are also many applications that disclose adding and kneading ultraviolet absorbers.
Japanese Patent No. 3063041 Japanese Patent No.2523492

  However, UV absorbers generally have a low molecular weight, and when they come into contact with the skin or body, they are likely to diffuse into the skin or body, and there is a concern that damage due to UV absorbers may occur. Further, there is a possibility that the ultraviolet absorber is eluted (specification [0003] of Patent Document 2). Furthermore, there are many types of UV absorbers, for example, even benzophenone UV absorbers have different wavelength absorption characteristics depending on the type, and even the same amount used may have different UV shielding effects. May be used, the polymerization of the lens material may be hindered (prior art of Patent Document 3).

Further, a coating layer having an ultraviolet absorbing ability is applied to the lens surface. However, this method has a problem that the cost is increased (Patent Document 4 below).
Japanese Patent No. 3334066

  The inventors of the present invention have a surface treatment of the hard coat layer as described above by a technique in which an organic polymer material constituting the lens body is brought into contact with a mixed fluid of a predetermined inorganic fine particle precursor and a high-pressure fluid, The present inventors have found that the problems of techniques such as addition of ultraviolet absorbers and kneading can be solved, and the present invention has been completed.

  The present invention has been made to solve the above-described problems, and does not impair the impact resistance of the lens as in the case where the hard coat layer is surface-treated, and an ultraviolet absorber is added and kneaded. It is an object to prevent the above-described adverse effects from occurring.

  In order to solve such problems, the present invention has been made as a lens and a method for producing the same. The invention according to claim 1 relates to the lens, wherein the inorganic fine particles are contained in the lens body made of an organic polymer material. It is characterized by being injected and dispersed. The invention according to claim 2 is characterized in that inorganic fine particles are injected and dispersed in the lens body by bringing the lens body made of an organic polymer material into contact with a high-pressure fluid.

  Furthermore, the invention according to claim 3 is the lens according to claim 1 or 2, wherein the lens body is composed of at least one of allyl diglycol carbonate, polycarbonate, polymethyl methacrylate, polyimide, or polystyrene. And

The invention according to claim 4 is the lens according to any one of claims 1 to 3, wherein the inorganic fine particles are at least one of silver, gold, platinum, palladium, copper, gadolinium, lead, titanium, silica, and iron. It is characterized by being. By using silver, gold, platinum, palladium, copper, or a mixture of a plurality of these as the inorganic fine particles, ultraviolet absorptivity, electromagnetic wave shielding, and antistatic effects are produced. Here, the electromagnetic wave shielding property means an action and an effect of attenuating the energy of the electromagnetic wave passing through the base material by reflecting the electromagnetic wave or changing it to an eddy current. Moreover, since gadolinium becomes a magnetic substance, when it is injected and dispersed, it becomes an electromagnetic wave absorbing material. A magnetic material such as ferrite (iron oxide) or gadolin serves as an electromagnetic wave absorber. Further, when lead is used, an X-ray shielding effect is produced. Further, titanium oxide and silicon oxide exhibit hydrophilicity, and silicon compounds having a hydrocarbon group exhibit water repellency. Iron also exhibits heat resistance. As an effect generated in general in the inorganic fine particles, there is an effect of improving the wear resistance, slidability and hardness in the vicinity of the surface.
In addition, as the precursor of the inorganic fine particles, an organic metal compound such as a metal alkoxide or a metal complex can be used. Since these precursors are dissolved in the supercritical fluid, they can penetrate into the plastic material through the supercritical fluid.

Further, the invention according to claim 5 is characterized in that in the lens according to any one of claims 1 to 4, inorganic fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the lens body. The reason for injecting and dispersing the inorganic fine particles in a portion deeper than 10 nm from the surface is that the inorganic fine particles exist in a portion closer to the surface than 10 nm.
This is because the inorganic fine particles may be peeled off.

Furthermore, the invention according to claim 6 is the lens according to any one of claims 1 to 5, wherein the volume content of the inorganic fine particles in the lens body is 0.001% or more and 10% or less. To do. This is because if it is less than 0.001% or exceeds 10%, for example, it may not be possible to provide functions such as bending elasticity and light absorption in a specific wavelength region. Here, “the volume content of fine particles with respect to the lens body” means a lens main body in which only fine particles are dispersed (assuming a portion having a certain thickness in the organic polymer material constituting the lens main body). the volume and V _1, the total volume occupied by the particulate inorganic material in that portion when the V _2, referred to those represented by _{V 2 / V 1 × 100 (} %).

  Furthermore, the invention according to claim 7 is the lens according to any one of claims 1 to 6, wherein the particle diameter of the inorganic fine particles is 1 nm or more and 100 nm or less. The inorganic fine particles also have a side surface that is a reinforcing material for the organic polymer material constituting the lens body. From this viewpoint, the smaller the diameter of the inorganic fine particles, the greater the mutual relationship with the organic polymer material that constitutes the lens body. The action becomes stronger, so that the fluidity of the organic polymer material is reduced, and as a result, the composite material becomes a strong material. In general, particles having a particle diameter of 100 nm or less are called nanoparticles, and the nanoparticles have excellent characteristics from the viewpoint of the reinforcing material as described above.

  In addition, it is known that the surface plasmon effect appears in the nanoparticles. Surface plasmon refers to an electron density wave that propagates the energy of electrons generated between a metal and a base material when fine metal particles are dispersed inside different materials. It is known that the characteristics strongly depend on the geometric characteristics of the interface, and that the plasmon effect appears on the surface of the nano-sized fine particles and absorbs light of a specific wavelength. Therefore, when the diameter of the fine particles is 100 nm or less, the ultraviolet absorption effect is further improved.

  The invention according to claim 8 further relates to a lens manufacturing method, wherein the precursor is obtained by bringing a lens body made of an organic polymer material into contact with a high-pressure fluid in which a precursor of fine particles to be converted into inorganic fine particles is dissolved. Is injected into the lens body, and then the lens body into which the precursor has been injected is brought into contact with the high-pressure fluid to wash the portion of the lens body to a depth of 10 nm from the surface of the lens body, and then washed. The precursor is converted into the inorganic fine particles, and a lens in which the fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the lens body is manufactured.

  Various fluids can be used as the high-pressure fluid, but it is preferable to use a subcritical fluid or a supercritical fluid that has excellent permeability to the organic polymer material. Examples of the fluid include carbon dioxide (critical temperature: 31.1 ° C., critical pressure: 7.38 MPa), nitrous oxide (critical temperature: 36.4 ° C., critical pressure: 7.24 MPa), and trifluoromethane (critical). Temperature: 25.9 ° C., critical pressure: 4.84 MPa), nitrogen (critical temperature: −147 ° C., critical pressure: 3.39 MPa), or a mixture of two or more thereof can be used.

  Furthermore, the invention according to claim 9 is that a lens body made of an organic polymer material and a precursor of fine particles to be converted into inorganic fine particles are housed in separate high pressure cells, and the high pressure fluid is contained in the high pressure cell containing the precursor. The precursor is dissolved in the high-pressure fluid, and then the high-pressure fluid in which the precursor is dissolved is supplied to the high-pressure cell in which the lens body is accommodated, and the high-pressure fluid in which the precursor is dissolved in the lens body. The precursor is injected into the lens body by contacting the fluid, and then only the high-pressure fluid is supplied to the high-pressure cell in which the lens body is accommodated, and the lens body into which the precursor is injected is brought into contact with the high-pressure fluid. Then, washing is performed to remove a portion of the precursor from the surface of the lens body to a depth of 10 nm, and then the precursor is converted into the inorganic fine particles, and the inorganic fine particles are formed at a position deeper than 10 nm from the surface of the lens body. There implantation, characterized in that to produce a distributed lens.

  Further, the invention according to claim 10 is the method for manufacturing a lens according to claim 8 or 9, wherein when the precursor of the inorganic fine particles is injected into the lens body, at least one of the lens body or the precursor is added together with the high-pressure fluid. A solvent that can be dissolved or plasticized is added as an auxiliary solvent. If the auxiliary solvent is a good precursor solvent, the precursor can be suitably injected into the organic polymer material by increasing the concentration of the precursor in the high-pressure fluid. If it is a solvent, plasticization of the organic polymer material will proceed more favorably, and as a result, the precursor will be easily injected into the organic polymer material. Therefore, the auxiliary solvent may be a good solvent for at least one of the organic polymer material and the precursor, but may be a good solvent for both.

  Furthermore, the invention described in claim 11 is the method for manufacturing a lens according to any one of claims 8 to 10, wherein a portion from the surface of the lens body to a depth of 10 nm is injected after the precursor of the inorganic fine particles is injected into the lens body. Before the precursor is cleaned and removed, the lens body is cooled to a temperature lower than the processing temperature at the time of injection. By cooling, the plasticization of the organic polymer material constituting the lens body is suppressed to some extent, and during the subsequent cleaning, the already injected fine particle precursor is prevented from being inadvertently detached from the lens body. Become.

  The invention according to claim 12 is the method for producing a lens according to any one of claims 8 to 11, wherein the means for converting the precursor of the inorganic fine particles into fine particles is the temperature of the organic polymer material constituting the lens body. It is a means for thermally decomposing the precursor by raising the temperature. The invention according to claim 13 is the method for producing a lens according to claim 12, wherein the precursor of the inorganic fine particles is a metal complex.

  Further, the invention according to claim 13 is the lens manufacturing method according to any one of claims 7 to 11, wherein the means for converting the precursor of the fine particles into the fine particles adds water to the high-pressure fluid as an auxiliary solvent, And a high-pressure fluid mixed with the lens body. Furthermore, the invention according to claim 14 is the method for producing a lens according to claim 13, wherein the precursor of the fine particles is a metal mainly composed of an alkoxide, a carbonyl complex, or an acetylacetone complex, or an alkoxide, a carbonyl complex, or an acetylacetone complex. It is a complex or a polymethylsiloxane or a derivative of polysiloxane.

  As described above, in the present invention, since the inorganic fine particles are injected and dispersed in the lens body made of the organic polymer material, the impact resistance is impaired as in the case of the conventional lens having the hard coat layer surface-treated. In addition, it is possible to achieve an ultraviolet absorption effect without adding and kneading a general ultraviolet absorber.

  In addition, when a lens is manufactured by injecting and dispersing fine particles at a position deeper than 10 nm from the surface of the lens body, the fine particles are detached from the lens body even if the lens surface is exposed to severe use conditions. And there is an effect that no cracks enter the fine particle dispersed layer.

  Further, when the particle diameter of the fine particles is 1 nm or more and 100 nm or less, the ultraviolet absorption effect is further improved, and an electromagnetic wave blocking effect by absorption is obtained.

  Further, in the lens manufacturing method of the present invention, the lens body is brought into contact with a high-pressure fluid in which a precursor to be converted into fine particles is dissolved, and the precursor is injected into the lens body, and then the precursor is injected. The lens body and the high-pressure fluid are brought into contact with each other to clean the portion of the lens body up to a depth of 10 nm from the surface of the lens body. It is possible to suitably manufacture a lens in which fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the main body. In addition, since the high-pressure fluid used in the injection process is used for the precursor cleaning process, the excess precursor is also efficiently removed.

  Further, the precursor to be converted into fine particles and the lens body are accommodated in separate high-pressure cells, the high-pressure fluid is supplied to the high-pressure cell in which the precursor is accommodated, and the precursor is dissolved in the high-pressure fluid. A high-pressure fluid in which a precursor is dissolved is supplied to a high-pressure cell in which a lens body is accommodated, and both are brought into contact with each other to inject the precursor into the lens body. Thereafter, only the high-pressure fluid is accommodated in the lens body. When the cleaning is performed by bringing the lens body into which the precursor is injected and the high-pressure fluid in contact with each other, the precursor dissolved in the high-pressure fluid can be efficiently brought into contact with the lens body, and an excessive amount can be obtained. It is possible to prevent the precursor from inadvertently contacting and adhering to the lens body, and in the cleaning process, carbon dioxide is continuously removed without previously removing the precursor remaining in the high pressure cell. By passing through It can be cleaned of the lens body in time. In addition, by replacing only the lens body inside the high-pressure cell, there is an effect that the precursor charged first can be used effectively in the next step.

  Furthermore, when the precursor is injected into the lens body, when a good solvent capable of dissolving or plasticizing at least one of the lens body and the precursor is added as an auxiliary solvent together with the high-pressure fluid, the lens body is plasticized. Since the precursor can be more reliably dissolved, or the precursor can be dissolved more suitably, there is an effect that the precursor can be more reliably injected into the lens body.

  Further, after injecting the precursor into the lens body, before the excessive precursor adhering to the surface of the lens body and the precursor injected to a depth of 10 nm from the surface are washed and removed, the processing temperature at the time of injection When the lens body is cooled to a lower temperature, plasticization of the organic polymer material constituting the lens body is suppressed to some extent, and the already injected precursor is inadvertently detached from the lens body during subsequent cleaning. This has the effect of preventing

  In addition, when processing a fluid that is a gas at normal temperature and pressure, such as carbon dioxide, as a process solvent, it is easy to separate the lens from carbon dioxide as the solvent, thereby simplifying the process. There is an effect that can be done.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
In this embodiment, the lens body is made of allyl diglycol carbonate (hereinafter also referred to as ADC resin or polyethylene glycol bisallyl carbonate), which is an organic polymer raw material, and the fine particles are made of silver. The lens body is molded into a desired shape in advance by a casting molding method in which the organic polymer raw material is poured into a mold as a lens for a spectacle lens and then cured.

Silver fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the lens body by a manufacturing method using a high-pressure fluid described later. These silver fine particles are silver complexes (6, 6, 7, 7, 8, 8, 8-heptafluoro-2,2-dimethyl-3,5-octanesinate) silver (hereinafter referred to as AgFOD). In other words, by dissolving AgFOD, which is a precursor, into the lens body by bringing the lens body into contact with the lens body, and further bringing only the high-pressure fluid into contact with the lens body after the injection of the precursor, The precursor is removed from the surface of the main body to a depth of 10 nm, and the precursor is converted into metal fine particles by subsequent thermal decomposition or the like, so that the fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the lens main body. The obtained lens will be obtained.

(Embodiment 2)
In the present embodiment, the lens body is made of polycarbonate (hereinafter also referred to as PC). The lens body is formed by molding PC monomer as an organic polymer raw material into a desired lens shape by an injection molding method.

In addition, the type of fine particles, the type of precursor, and the like are the same as those in the first embodiment. Also in this embodiment, silver fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the lens body by a high-pressure fluid.

(Embodiment 3)
In the present embodiment, the lens body is made of polymethyl methacrylate (hereinafter also referred to as PMMA). The lens body is formed by molding MMA as an organic polymer material into a desired lens shape by an injection molding method.

In addition, the type of fine particles, the type of precursor, and the like are the same as those in the first and second embodiments. Also in this embodiment, silver fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the lens body by a high-pressure fluid.

(Embodiment 4)
In the present embodiment, titanium oxide is used as the inorganic fine particles in place of the silver in the above embodiment. Therefore, a metal alkoxide, more specifically titanium isopropoxide, is used as a precursor of the inorganic fine particles in place of the silver organometallic complexes of the first to fourth embodiments.

As the material of the lens body, the ADC resin, PC, or PMMA of the above-described embodiments can be used. The titanium oxide particles are injected and dispersed in the same manner as in the first to third embodiments.

(Embodiment 5)
In the present embodiment, silica (silicon oxide) is used as the inorganic fine particles in place of the silver oxide in the first to third embodiments or the titanium oxide in the fourth embodiment. Accordingly, siliconize (registered trademark) containing dimethylpolysiloxane as a main component is used in place of the silver organometallic complex or titanium isopropoxide of the above embodiment as a precursor of the inorganic fine particles.

  As the material of the lens body, the ADC resin, PC, or PMMA of the above-described embodiments can be used. Moreover, the injection | pouring and dispersion | distribution state of a silica particle are the same as that of Embodiment 1-4.

(Embodiment 6)
The present embodiment is an embodiment of a lens manufacturing method. FIG. 1 is a schematic block diagram of an apparatus used for manufacturing a lens as one embodiment. The apparatus of this embodiment includes a high-pressure pump 2, a pressure gauge 3, a thermostatic chamber 4, a back pressure valve 5, and a high-pressure cell 6.

  The high pressure pump 2 is a pump for supplying a high pressure fluid to the high pressure cell 6. In this embodiment, a plunger type high-pressure pump manufactured by JASCO Corporation was used, but besides this, a plunger type or diaphragm type, such as a product manufactured by Nihon Seimitsu Co., Ltd., Nikkiso Co., Ltd., or Fuji Pump Co., Ltd. High pressure pumps can generally be used. The high pressure pump 2 is connected to a cylinder 1 for supplying high pressure fluid. In this embodiment, carbon dioxide is used as the high-pressure fluid.

  The pressure gauge 3 is for detecting and displaying the pressure in the system at the time of operation, and is preferably installed in the front stage of the high-pressure cell 6 in order to prevent contamination inside the gauge. For example, pressure gauges manufactured by Nagano Keiki Co., Ltd., Yamazaki Keiki Co., Ltd. can be used. As a type, a diaphragm type or a Bourdon tube type can be used, but a diaphragm type is preferable for preventing contamination.

  The thermostat 4 is for precisely adjusting the temperature of the high-pressure cell 6, and air, water, oil, ethylene glycol, sand, and other mixtures thereof can be used as the heat conducting medium. Oil and sand are effective under high temperature conditions of 100 ° C. or higher, and water, ethylene glycol, and mixtures thereof are effective under low temperature conditions of 100 ° C. or lower. Air is effectively applicable to both ranges. In the present embodiment, an air circulation type thermostatic chamber manufactured by GL-Science Co., which enables precise temperature control is used.

  The back pressure valve 5 is a valve for keeping the pressure in the high pressure cell 6 constant, and a manual or automatic back pressure valve can be used. For example, back pressure valves such as those manufactured by AKICO, Toyo High Pressure, and JASCO can be used. From the viewpoints of fine adjustment of the decompression speed and reduction of pressure fluctuation, an automatic control back pressure valve is preferable.

  The high-pressure cell 6 is a container for injecting a precursor 9 of inorganic fine particles into the lens body 8. Inside the high-pressure cell, a frame for fixing the lens body 8 and an agitation facility for agitating the fluid in the cell are provided. As the stirring equipment, either a stirring blade type or a fluid circulation type can be used. Although not shown, a visible window for internal observation may be attached in order to make it easy to observe the state inside the high-pressure cell 6.

  In addition, in the apparatus of this embodiment, each apparatus is connected by pressure-resistant piping, and further, a pressure-resistant valve is appropriately provided in the middle of the piping path for adjusting the flow rate of the fluid and opening and closing the flow path. (The pressure-resistant valve is omitted in the drawing). For example, a pressure resistant valve manufactured by Swagelok or Autoclave can be used. The material of the pressure-resistant component device is not particularly limited, but is preferably a pressure-resistant and corrosion-resistant material such as SUS304, SUS316, SUS316L, Hastelloy, Inconel, and Monel steel.

  Next, an embodiment of a method for manufacturing a lens using such an apparatus will be described.

  First, a lens body 8 made of an organic polymer material for injecting and dispersing inorganic fine particles is fixed to a material fixing base in a high-pressure cell 6, and a high pressure together with an inorganic fine particle precursor 9 and a stirring bar 7 for stirring. The cell 6 is sealed. In this embodiment, allyl diglycol carbonate (ADC resin), which is a functional plastic, is used as the lens body 8. As the inorganic fine particles, silver was selected which has little influence on the living body and can be expected to impart electromagnetic wave shielding and electrical conductivity. The silver precursor 9 is a silver complex (6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanesinate) silver (AgFOD) Was used.

  Next, after supplying carbon dioxide from the cylinder 1 to the high pressure cell 6 and purging the remaining air in the high pressure cell 6, the high pressure pump 2 is used to supply carbon dioxide to the high pressure cell 6, and the temperature and pressure are adjusted. did. The temperature was adjusted with the thermostat 4 and the pressure was adjusted with the back pressure valve 5. The temperature and pressure may be any conditions as long as the high-pressure fluid to be used becomes a subcritical fluid or a supercritical fluid. In this embodiment, carbon dioxide (critical temperature: 31.1 ° C., critical pressure: 7.38 MPa) is used as the high-pressure fluid, and therefore the temperature range is preferably 25 ° C. to 130 ° C. In short, when injecting an organometallic compound that is a precursor of inorganic fine particles into the base material, the temperature prevents the malfunction that the organometallic compound is not injected into the base material due to decomposition and mineralization. Choose a range. The pressure is preferably 6 MPa to 50 MPa from the viewpoint of device safety.

  After reaching the predetermined temperature and pressure conditions, the high-pressure pump 1 was stopped, the stirring in the high-pressure cell 6 was started by the stirrer 7, and carbon dioxide and the precursor 9 were mixed. In addition, although not shown in figure, the magnet-type stirring apparatus was used for rotation of the stirring element 7. FIG. After the start of stirring, the injection treatment was performed for a predetermined time.

  When the supercritical fluid of carbon dioxide contacts the lens body 8, the carbon dioxide penetrates into the lens body 8. Therefore, the organic polymer material constituting the lens body 8 swells and plasticizes, the glass transition temperature and the viscosity are lowered, and the movement characteristics of the substance inside the organic polymer material are remarkably improved. Furthermore, since the precursor 9 is dissolved in carbon dioxide, which is a supercritical fluid, the precursor 9 can be infiltrated into the organic polymer material using carbon dioxide as a medium. The treatment time at this time is preferably 5 minutes to 4 hours. This processing time is determined as the time required for the supercritical carbon dioxide to sufficiently penetrate into the lens body 8.

  After the injection process, the high pressure pump 6 was operated to continuously circulate carbon dioxide, and the precursor 9 excessively attached to the surface of the lens body 8 was removed. When carbon dioxide is continuously circulated, first, the precursor 9 flows out of the high-pressure cell 6, and then carbon dioxide comes into contact with the surface of the lens body 8, thereby excessively adhering to the lens body 8. The precursor 9 can be washed away. At this time, since the precursor 9 penetrating into the lens body 8 is fixed inside the lens body 8, it does not flow out to the outside. Further, before the carbon dioxide is circulated, the temperature of the precursor inside the lens body 8 is once reduced by cooling to a low temperature of 25 ° C. or less, and then the carbon dioxide may be circulated.

  Thereafter, the back pressure valve 5 is opened to reduce the pressure in the high pressure cell 6 to atmospheric pressure. At this time, when the pressure is reduced at a speed higher than 0.1 MPa / min, the organic polymer material constituting the lens body 8 is foamed by the carbon dioxide remaining in the lens body 8. When reducing the pressure without foaming the organic polymer material, it is preferable to reduce the pressure at a rate slower than 0.1 MPa / min.

  Furthermore, while the lens body 8 was held inside the high-pressure cell 6, heat treatment was performed in the thermostat 4 to reduce the precursor 9 inside the lens body 8 to metal fine particles, thereby manufacturing a lens.

  The operation conditions of the thermostat 4 were 160 ° C., which is the decomposition temperature of AgFOD as the precursor 9, and the treatment time was 2 hours. The precursor 9 can be converted from an organic substance to an inorganic substance by pyrolyzing, but at this time, since the pyrolysis temperature differs depending on the type of the precursor 9, a processing temperature is appropriately selected according to the type. be able to. For example, the silver acetylacetone complex is 100 ° C, the copper acetylacetone complex is 286 ° C, the nickel acetylacetone complex is 240 ° C, the platinum acetylacetone complex is 251 ° C, the palladium acetylacetone complex is 260 ° C, and the like. Moreover, the dimethylpolysiloxane which is a precursor of the oxide of silica is 100-150 degreeC.

(Embodiment 7)
In the equipment of this embodiment, as shown in FIG. 2, a solvent pump 10 is provided in addition to the high pressure pump 2, the pressure gauge 3, the thermostatic chamber 4, the back pressure valve 5, and the high pressure cell 6. A storage tank 11 is connected. That is, in this embodiment, carbon dioxide is used as the fluid, and a solvent is used as the auxiliary solvent.

  Next, only a different part is shown about the operation procedure on the comparison with Embodiment 6. FIG.

  After the lens body 8 and the precursor 9 are sealed in the high-pressure cell 6 and the remaining air is purged, carbon dioxide is circulated and set to a predetermined temperature and pressure. Subsequently, acetone as a solvent is added to the solvent pump 10. A predetermined amount is put into the high-pressure cell 6 using. After the acetone is charged, the high-pressure pump 6 and the solvent pump 10 are stopped and the injection process is performed for a predetermined time. The input amount of acetone is preferably from 0.5% to 10% in terms of molar ratio with respect to the input amount of carbon dioxide at a predetermined temperature and pressure condition.

  After the injection process, when the high-pressure pump 6 is operated to circulate carbon dioxide continuously, and when the precursor 9 adhering excessively to the surface of the lens body 8 is removed, acetone is added to enhance the cleaning effect. However, carbon dioxide can be flowed. Since the operation procedures other than the injection process of the precursor 9 and the cleaning removal process of the excess precursor 9 are the same as those in the sixth embodiment, the description thereof is omitted here.

  In this embodiment, since acetone, which is a good solvent for both the organic polymer material constituting the lens body 8 and the precursor 9, is used as the auxiliary solvent, the lens body 8 can be more easily plasticized. There is an effect that the precursor 9 can be more easily penetrated into the inside. Further, by increasing the solubility of the precursor 9 in carbon dioxide, the amount of the precursor 9 penetrating into the lens body 8 can be increased, and the auxiliary solvent is used in the cleaning process. There is an effect that it is possible to further improve the cleaning effect of the excess precursor 9 adhered to the substrate.

  From the viewpoint of producing such an effect, it is desirable that the solvent is selected as a good solvent for the lens body 8 and a good solvent for the inorganic fine particle precursor 9. In this embodiment, acetone is used as the solvent. However, the interaction between the auxiliary solvent and the precursor 9 or the lens body 8 is examined in advance, and the good solvent for the precursor 9, the good solvent for the lens body 8, or By confirming whether the precursor 9 and the lens body 8 are both good solvents, solvents other than acetone can be selected as appropriate. For example, lower alcohols such as methanol, ethanol, n-propanol, and isopropanol can be used.

(Embodiment 8)
In this embodiment, as shown in FIG. 3, there are provided two high-pressure cells, a high-pressure cell 6a dedicated to the dissolution / extraction of the inorganic fine particle precursor 9 and a high-pressure cell 6b dedicated to the processing of the lens body 8. Constant temperature baths 4a and 4b are installed in the high-pressure cell, respectively, and a circulation pump 12 and its circulation line 22 are installed for stirring in the system.

  In Embodiments 6 and 7, the precursor 9 is dissolved in one high-pressure cell and the plasticizing process of the lens body 8 is performed. In this embodiment, the precursor 9 is dissolved and extracted in the high-pressure cell 6a. And the plasticizing process of the lens body 8 in the high-pressure cell 6b.

  More specifically, first, the valve 13 on the high-pressure pump 2 side, and the valves 14, 15, 16, 17 at the inlet and outlet of the high-pressure cell 6a and the high-pressure cell 6b are opened, and the other valves 18, 19, 20, 21 are closed, the remaining air in the high pressure cells 6 a, 6 b is purged, and then the high pressure pump 6 is used to discharge carbon dioxide from the cylinder 1 until the predetermined temperature and pressure are reached. , 6b.

  After reaching the predetermined pressure, the high pressure pump 2 is stopped, the valve 13 on the high pressure pump 2 side is closed, the valves 20 and 21 in the circulation line 22 are opened, and the circulation pump 12 is operated. Let As a result, the high-pressure fluid circulates in the circulation line 22 and is supplied to the high-pressure cells 6a and 6b. The high-pressure fluid efficiently dissolves the precursor 9 and also efficiently contacts the material 8, thereby surplus precursor. 9 can be prevented from inadvertently contacting and adhering to the material 8.

  After the precursor 9 is injected into the lens body 8 in this way, the valves 14 and 15 at the inlet and outlet of the high pressure cell 6a are closed, and the valve 18 therebetween is opened. The precursor 9 is not supplied to the high pressure cell 6a, and only the high pressure fluid is supplied to the high pressure cell 6b. As a result, the lens body 8 is cleaned in the same manner as in the above embodiments. In this cleaning process, the precursor 9 remaining in the high-pressure cell 6a does not need to be discharged outside the high-pressure cell 6a, and the carbon dioxide is continuously circulated only in the high-pressure cell 6b, thereby reducing the lens in a shorter time. The main body 8 can be cleaned.

  After the above injection and cleaning processes are completed, the back pressure valve 5 is opened to remove carbon dioxide in the high pressure cell 6b, the high pressure cell 6b is opened, and a new lens body 8 is placed in the high pressure cell 6b. Install and do the same. In this case, since the precursor 9 is accommodated in a high-pressure cell 6a different from the high-pressure cell 6b in which the lens body 8 is accommodated, only the lens body 8 inside the high-pressure cell 6b is replaced, so The internal precursor 9 can be used effectively for the processing of the next new material from what was initially charged.

  As described above, in this embodiment, the high-pressure cell 6a dedicated to dissolution / extraction and the high-pressure cell 6b dedicated to the processing of the lens body 8 are provided, and the system is stirred by the circulation pump 12. Thus, the precursor 9 dissolved in the high-pressure fluid efficiently contacts the lens body 8 inside the high-pressure cell 6a, and the excess precursor 9 is prevented from inadvertently contacting and adhering to the lens body 8. In the next cleaning step, the precursor 9 remaining in the high-pressure cell 6a is not removed from the high-pressure cell 6a in advance, and carbon dioxide is continuously passed through only the high-pressure cell 6b. The main body 8 can be cleaned, and by replacing only the lens main body 8 inside the high-pressure cell 6b, the precursor 9 initially charged can be used effectively in the next step.

(Embodiment 9)
In the apparatus of the present embodiment, as shown in FIG. 4, a solvent storage tank 11 and a solvent pump 10 are provided in addition to the components of the eighth embodiment. Therefore, in this embodiment, carbon dioxide is used as the fluid, and a solvent is used as the auxiliary solvent. The operational effects obtained by using a solvent in addition to carbon dioxide are the same as those in the seventh embodiment.

  Next, only a different part is shown about the operation procedure on the comparison with Embodiment 8. FIG. That is, the lens body 8 and the inorganic fine particle precursor 9 are sealed in the high-pressure cells 6a and 6b, respectively, and after purging the remaining air, carbon dioxide is circulated and set to a predetermined temperature and pressure. A predetermined amount of acetone as a solvent is supplied to the high pressure cell 6a and the high pressure cell 6b using the solvent pump 11. After the supply of acetone, the high-pressure pump 2 is stopped and an injection process is performed for a predetermined time. At this time, the circulation pump 12 can be operated to uniformly stir the fluid in the system. As in the second embodiment, the supply amount of acetone is preferably 0.5 to 10% in terms of molar ratio with respect to the input amount of carbon dioxide under predetermined temperature and pressure conditions.

  After the injection process, the high-pressure pump 2 is operated to continuously circulate carbon dioxide, and the precursor 9 excessively attached to the surface of the lens body 8 is removed. At this time, in order to enhance the cleaning effect, carbon dioxide can be allowed to flow while adding acetone. Furthermore, if the valves 14 and 15 at the inlet and outlet of the high pressure cell 6a are closed and the valve 18 between them is opened during the cleaning process, carbon dioxide is supplied only to the high pressure cell 6b side. It is not necessary to perform the step of removing the precursor 9 remaining in 6a in advance, and the cleaning operation can be performed more effectively. In this embodiment, the valve 23 is provided not only on the high-pressure pump 2 side but also on the solvent pump 10 side. The other steps are the same as those in the fifth to seventh embodiments, and the description thereof is omitted here.

(Embodiment 10)
In this embodiment, a metal alkoxide is used as the inorganic fine particle precursor 9 in place of the silver organometallic complexes of the above-described Embodiments 6 to 9. More specifically, titanium isopropoxide was used. In this embodiment, ethanol or isopropanol is used as the solvent.

  And after inject | pouring this precursor 9 into the lens main body 8, water is distribute | circulated with a carbon dioxide. As a result, titanium isopropoxide was hydrolyzed to titanium oxide, and as a result, fine particles of titanium oxide were injected and dispersed in the lens body 8. The apparatus used and the material of the lens body 8 are the same as those in the sixth to ninth embodiments.

(Embodiment 11)
In the present embodiment, the inorganic fine particle precursor 9 is siliconized (registered trademark) having dimethylpolysiloxane as a main component in place of the silver organometallic complexes of the sixth to ninth embodiments and the titanium isopropoxide of the tenth embodiment. Was used. In this embodiment, no solvent is used.

In this embodiment, instead of the method of converting the silver complex of Embodiments 6 to 9 into a metal and the method of mineralizing titanium isopropoxide of Embodiment 10, in this embodiment, siliconize as a precursor 9 is injected into the lens body 8. Then, the siliconize was mineralized by heat treatment at a temperature of 100 ° C. to 150 ° C. for 30 minutes to 2 hours.

  The apparatus used and the material of the lens body 8 are the same as those in the sixth to tenth embodiments.

Embodiment 12
In the present embodiment, polymethyl methacrylate (PMMA) is used as the organic polymer material constituting the lens body 8 instead of the allyl diglycol carbonate (ADC resin) of the above-described Embodiments 6 to 11. The inorganic fine particle precursor 9 uses the same silver complex as in Embodiments 6 to 9, and the manufacturing apparatus and operation procedure are also performed in the same manner, so that a lens in which silver fine particles are dispersed in the lens body 8 can be obtained. It was.

(Other embodiments)
In Embodiments 1 to 12, allyl diglycol carbonate (ADC resin), polymethyl methacrylate (PMMA), polycarbonate (PC), or the like is used as the organic polymer material constituting the lens body 8. The material is not limited to this, and for example, a transparent plastic such as polystyrene or transparent polyimide can be used. In short, any transparent organic polymer material that can be molded as a lens is not limited.

  Also, the kind of fine particles is not limited to the silver, titanium oxide, and silica of the above-described first to twelfth embodiments. For example, metals such as gold, platinum, palladium, copper, gadolinium, lead, iron, and these metals It is also possible to use oxides.

Further, the precursor of the fine particles is not limited to the above embodiment, and an acetylacetone complex, an alkoxide, a carbonyl complex, and derivatives thereof, organometallic complexes, polymethylsiloxane, polysiloxane derivatives, and the like can be used. In short, it is only necessary that these precursors can be converted into inorganic substances such as metals and metal oxides by post-treatment.

  In addition, the type of the high pressure valve located in the middle of the piping of the apparatuses of Embodiments 6 to 12 may be a needle type, a diaphragm type, a ball valve type, or the like. A needle type is preferably used for pressure adjustment, and a ball valve type is preferably used for efficient opening and closing of the flow path. Moreover, in order to prevent the inflow of impurities into the bulb, a diaphragm type is preferable.

  Further, the high-pressure cell is preferably provided with a visible window in order to observe changes in the internal lens body 8 or fluid. Moreover, in order to prevent the reactant in the high pressure cell from adhering to the inner surface of the visible window, it is preferable to attach a protective cover such as mica to the inner surface of the visible window.

Furthermore, the use of the lens of the present invention is not limited, and it can be used for eyeglass lenses, contact lenses, sports glasses, loupe lenses, optical instrument lenses, optical instrument window materials, and the like.

  Examples of the present invention will be described below.

(Example 1)
In this example, the influence of temperature and pressure on the amount of silver injected into allyl diglycol carbonate (ADC) constituting the lens body was examined. The apparatus of Embodiment 2 was used as a test apparatus. The operation procedure is as follows.
First, an ADC test piece (a lens shape having a diameter of 60 mm × thickness of 2 mm) is prepared as a material, and is fixed to a sample gantry. As a precursor, an acetylacetone complex of 10 wt% or 15 wt% of Ag with respect to the weight of the test piece [Ag (acac)] (manufactured by Aldrich) was enclosed in a high-pressure cell together with a stirring bar.

  Subsequently, the remaining air in the high-pressure cell was purged with carbon dioxide, and then the temperature was adjusted to 35 ° C. and the pressure was adjusted to 20 MPa. After reaching a predetermined condition, acetone as an auxiliary solvent was charged with a high-pressure pump. The input amount of acetone was 10% with respect to the number of moles of carbon dioxide. After adding acetone, stirring in the high-pressure cell was started, and an injection treatment was performed for 2 hours. The weight of the sample piece before and after the injection was measured, and the amount of silver injected was determined from the difference.

  Next, the temperature was changed to 50 ° C. and 70 ° C., and the amount of silver injected at 20 MPa was determined in the same manner. Moreover, the pressure was changed to 25 MPa, the temperature was changed to 35 ° C., 50 ° C., and 70 ° C., and the amount of silver injected was similarly determined. And the weight increase rate was calculated | required from the injection amount. The results are shown in Table 1, and the correlation between the increase / decrease in the amount of injected silver and the temperature and pressure is shown in FIG.

  As is clear from FIG. 5, at 35 ° C. and 50 ° C., the amount of injection was larger at 25 MPa than at the pressure of 20 MPa, and thus the rate of increase in weight was higher. However, at 70 ° C., in both cases of 20 MPa and 25 MPa The injection volume was almost the same.

(Example 2)
In this example, the temperature dependence of the injection amount of silver with respect to ADC or PMMA constituting the lens body was examined. Specifically, the rate of weight increase due to temperature change was examined. The test apparatus and method were the same as in Example 1. An acetylacetone complex was used as the precursor in the same manner as in Example 1, and the amount of acetone charged was also 10 mol% as in Example 1. The pressure was 20 MPa. The weight increase rate of ADC is shown in Table 1 above, and the weight increase rate of PMMA is shown in Table 2. The change in the weight increase rate is shown in FIG.

  As is clear from FIG. 6, the weight increase rate of PMMA increased significantly as the temperature was increased to 35 ° C., 50 ° C., and 70 ° C. On the other hand, the weight increase rate of ADC did not change as in the case of PMMA even when the temperature was raised, but a weight increase rate of about 1% by weight was observed at 35 ° C., and 1.5 wt. A weight increase rate of nearly% was observed.

(Example 3)
In this embodiment, Ag (acac) or AgFOD (6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octa) is used for the ADC constituting the lens body. The influence of the complex, which is the precursor, on the amount of silver injected into the screw anate) was investigated. Specifically, the rate of weight increase due to pressure change was examined. The test apparatus and method were the same as in Examples 1 and 2 above. The amount of acetone charged was also 10 mol% as in Example 1. The temperature was 35 ° C. The weight increase rate of Ag (acac) is shown in Table 1, and the weight increase rate of AgFOD is shown in Table 3. The change in the weight increase rate is shown in FIG.

  As apparent from FIG. 7, the weight increase rate when Ag (acac) was used was about 0.9% by weight at a pressure of 20 MPa, and increased to about 1.1% by weight at 25 MPa. When AgFOD was used, the weight did not increase at a pressure of 20 MPa, but was about 0.4% by weight at 25 MPa.

Example 4
In this example, the influence of the complex which is the precursor on the amount of silver injected into the ADC constituting the lens body was examined. Specifically, for each of Ag (acac) and AgFOD, the rate of weight increase when 10 mol% acetone was used as an auxiliary solvent and when no auxiliary solvent was used was examined. The test apparatus and method were the same as those in Examples 1 to 3. The temperature was 35 degrees and the pressure was 25 MPa. The weight increase rate of Ag (acac) is shown in Tables 4 and 5 in addition to Table 1, and the weight increase rate of AgFOD is shown in Tables 3, 6 and 7. The change in the weight increase rate is shown in FIG.

  As is clear from FIG. 8, the weight increase rate when Ag (acac) was used as the precursor was about 0.5% by weight when no auxiliary solvent was used, but 10 mol% of acetone was added. When used, it was about 0.4-0.5% by weight when no auxiliary solvent was used, but about 0.3-0.4% by weight when 10 mol% acetone was used. And conversely decreased.

(Example 5)
In this example, the absorbability of ultraviolet rays was examined for a test piece made of ADC into which silver particles were injected. Specifically, the absorbance of the test piece was measured using a UV-2400 type UV-VIS spectrophotometer manufactured by Shimadzu. An untreated ADC test piece was used as a reference. A test piece having a size of 20 mm × 20 mm × 2 mm was used. Three types were tested: one using 10 mol% acetone as a cosolvent, one using 5 mol% acetone, and one using no cosolvent. The results of the test are shown in FIGS. As is clear from FIGS. 9 and 12, no particular absorption was observed for the untreated ADC test piece in which no silver particles were injected, but in the case of a test piece made of ADC in which silver particles were injected, 400 nm to 500 nm. It was found to absorb light in the wavelength region of.

  However, when the auxiliary solvent is not used, the absorbance in the vicinity of 420 nm to 440 nm is low at about 0.1, and when 5 mol% of acetone is used as the auxiliary solvent, the absorbance in the wavelength region is about 0.3. When 10 mol% acetone was used as the auxiliary solvent, the absorbance in the wavelength region was further increased to about 0.9. From this, it was found that the ultraviolet absorption effect was produced by injecting silver particles as compared with the untreated case, and that the ultraviolet absorption effect was further enhanced by using the auxiliary solvent.

(Example 6)
In this example, dimethylpolysiloxane was injected into PMMA, and the elongation and tensile strength of the test piece after heat treatment were measured. Specifically, three types were tested: untreated untreated, treated at 50 ° C. and 20 MPa, treated at 70 ° C. and 20 MPa, and treated at 70 ° C. and 15 MPa. The injection apparatus and method were the same as those in Examples 1 to 4. In this example, no solvent as an auxiliary solvent was used. The tensile strength and breaking elongation of the sample were measured using a DP-LSC type small tabletop testing machine manufactured by JTTOHSI. The test results are shown in Table 8 and FIG.

As is clear from FIG. 10, those treated at 70 ° C. and 20 MPa did not change much in elongation and tensile strength, but those treated at 50 ° C. and 20 MPa, and 70 ° C., Those treated at 15 MPa improved both elongation and tensile strength compared to untreated ones.

(Example 7)
In this example, the dispersion state of the Ag fine particles injected into the PMMA test piece was observed by observing the cross section of the sample piece with a transmission electron microscope (TEM). The apparatus was observed at an acceleration voltage of 125 kV using a Hitachi H-7100 transmission electron microscope. As a sample, an ultrathin section was prepared with an ultramicrotome (using a diamond knife), the section was loaded on a copper mesh, and subjected to a carbon vapor deposition process as a reinforcing process to obtain a sample for a TEM microscope. The obtained TEM image is shown in FIG.

  As is clear from FIG. 11 and the like, it was found that metal Ag particles were dispersed in a portion deeper than 10 nm from the surface of PMMA. Moreover, the particle size of 500 or more particles was measured from the obtained TEM image, and the average particle size was obtained. The average particle diameter was 20 nm, and the width of the particle diameter was 4 nm to 40 nm. Furthermore, the volume content of Ag fine particles with respect to the base material was 8%.

  Next, the absorbability of ultraviolet rays as one of the functions of PMMA in which Ag fine particles are dispersed was examined. Specifically, the absorbance of the test piece was measured using a UV-2400 type UV-VIS spectrophotometer manufactured by Shimadzu. An untreated PMMA specimen was used as a reference. As a result of the measurement, it was found that the test piece obtained in this example absorbs light in the wavelength region of 350 nm to 450 nm.

  Incidentally, PMMA originally does not absorb light in the wavelength region of 350 nm to 450 nm, but by combining Ag fine particles as described above, it absorbs light in this wavelength region and, as a result, is suitably applied to, for example, contact lenses. can do. Furthermore, in order to confirm the presence or absence of peeling of the functional layer due to chemicals, the surface of the above test piece was further wiped with acetone, and similarly the light absorption was examined. As a result, there was no difference in absorbability before and after wiping. It was. From this result, it was confirmed that the detachment of fine particles from the dispersed layer was not observed even by the drug.

  The lens of the present invention can be widely applied to optical lenses such as eyeglass lenses, contact lenses, sports glasses, magnifying microscopes, cameras, telescopes, binoculars, and other various lenses composed of transparent plastic materials. .

Schematic block diagram of an apparatus for producing inorganic fine particle composite organic polymer material as one embodiment Schematic block diagram of an apparatus for producing inorganic fine particle composite organic polymer material as one embodiment Schematic block diagram of an apparatus for producing inorganic fine particle composite organic polymer material as one embodiment Schematic block diagram of an apparatus for producing inorganic fine particle composite organic polymer material as one embodiment The graph which shows the correlation of the weight increase rate by silver injection | pouring with respect to an ADC sample, temperature, and a pressure. The graph which shows the correlation of the weight increase rate by silver injection | pouring with respect to an ADC sample and a PMMA sample, and temperature. The graph which shows the correlation with the weight increase rate by the injection | pouring of silver, and a pressure at the time of using Ag (acac) and AgFOD as a precursor with respect to an ADC sample, respectively. The graph which shows the correlation with the weight increase rate by injection | pouring of silver at the time of using Ag (acac) and AgFOD as a precursor with respect to an ADC sample, respectively, and the presence or absence of use of an auxiliary solvent, respectively. The chart which shows the ultraviolet absorption spectrum of the ADC sample which inject | poured silver. The graph which shows the correlation with the elongation and tensile strength, temperature, and pressure when a dimethylpolysiloxane is inject | poured with respect to a PMMA sample. The transmission electron micrograph which shows the state which disperse | distributed silver with respect to the sample. The chart figure which shows the ultraviolet absorber spectrum of the ADC sample which has not inject | poured silver.

Claims (13)

A lens characterized in that inorganic fine particles are injected and dispersed in a lens body made of an organic polymer material. A lens in which inorganic fine particles are injected and dispersed in a lens body by bringing the lens body made of an organic polymer material into contact with a high-pressure fluid. The lens according to claim 1 or 2, wherein the lens body is composed of at least one of allyl diglycol carbonate, polycarbonate, polymethyl methacrylate, polyimide, or polystyrene. The lens according to any one of claims 1 to 3, wherein the inorganic fine particles are at least one of silver, gold, platinum, palladium, copper, gadolinium, lead, titanium, silica, and iron. The lens according to any one of claims 1 to 4, wherein inorganic fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the lens body. The lens according to any one of claims 1 to 5, wherein a volume content of the inorganic fine particles in the lens body is 0.001% or more and 10% or less. The lens according to any one of claims 1 to 6, wherein the particle diameter of the inorganic fine particles is 1 nm or more and 100 nm or less. The precursor is injected into the lens body by bringing a lens body made of an organic polymer material into contact with a high-pressure fluid in which a precursor of fine particles to be converted into inorganic fine particles is dissolved, and then the precursor is injected. The lens body is brought into contact with the high-pressure fluid and washed to remove the precursor from the surface of the lens body to a depth of 10 nm, and then the precursor is converted into inorganic fine particles. A method for producing a lens, comprising producing a lens in which fine particles are injected and dispersed in a region deeper than 10 nm. A lens body made of an organic polymer material and a precursor of fine particles to be converted into inorganic fine particles are housed in separate high-pressure cells, and a high-pressure fluid is supplied to the high-pressure cell containing the precursors to bring the precursors into high pressure. The precursor is dissolved by supplying the high-pressure fluid dissolved in the fluid and then the precursor to the high-pressure cell in which the lens body is accommodated, and contacting the lens body with the high-pressure fluid in which the precursor is dissolved. Is injected into the lens body, and then only the high-pressure fluid is supplied to the high-pressure cell in which the lens body is housed, and the lens body into which the precursor is injected is brought into contact with the high-pressure fluid, and 10 nm from the surface of the lens body Wash to remove the precursor up to the depth of, then convert the precursor to inorganic fine particles, and manufacture the lens in which the inorganic fine particles are injected and dispersed in a portion deeper than 10 nm from the surface of the lens body Method of manufacturing a lens, wherein the door. 10. The lens according to claim 8, wherein a solvent capable of dissolving or plasticizing at least one of the lens body and the precursor is added as an auxiliary solvent together with the high-pressure fluid when the inorganic fine particle precursor is injected into the lens body. Production method. After injecting the precursor of the inorganic fine particles into the lens body, the lens body is cooled to a temperature lower than the processing temperature at the time of injection before removing the precursor from the surface of the lens body to a depth of 10 nm. The manufacturing method of the lens in any one of Claims 8 thru | or 10. The means for converting a precursor of inorganic fine particles into inorganic fine particles is means for thermally decomposing the precursor by increasing the temperature of the organic polymer material constituting the lens body. Lens manufacturing method. The lens according to claim 12, wherein the precursor of the inorganic fine particles is an alkoxide, a carbonyl complex, or an acetylacetone complex, a metal complex mainly composed of an alkoxide, a carbonyl complex, or an acetylacetone complex, or a polymethylsiloxane or a polysiloxane derivative. Manufacturing method.

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