JPH0257003B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method of manufacturing an optical component. Conventionally, many optical components such as lenses, mirrors, and filters have been made of glass. This is because there are many types of glass, and in addition to being able to form optical parts having optical properties that meet requirements, flat or spherical optical surfaces can be formed with high precision by polishing. However, polishing has the disadvantage that processing time is long and processing cost is also high. Moreover, especially when forming an aspherical optical element, there is a drawback that the processing cost becomes higher. Another method for manufacturing optical components that overcomes these drawbacks is to manufacture so-called plastic lenses by injecting a transparent resin into a mold and molding it. This method does not require polishing, and if appropriate molding conditions are selected, mass production is possible at low cost. However, it is not easy to make optical components with high optical precision, and they are inferior to glass materials in terms of physical and chemical properties, especially in terms of thermal expansion coefficient and thermal refractive index. The disadvantage is that the change is large, and internal distortion and sink marks are likely to occur during processing. As a method of compensating for the drawbacks of both glass materials and resin materials, there is a method of manufacturing optical components using a combination of both materials. In this method, a master having an optical surface of an optical component to be formed and a glass substrate are placed close to each other, and a resin is sandwiched or injected into the gap between the two and solidified. By forming a resin layer having an optical surface therebetween, and then separating the master and the glass substrate, an optical component consisting of the glass substrate and the resin layer is formed. In most cases, this method requires polishing the glass substrate to a certain degree of precision, but since the resin layer allows the optical precision to be achieved as an optical component, the polishing process of the glass itself can be largely omitted. Also, since the resin layer is a thin film, it is less affected by thermal expansion and changes in the refractive index due to heat.
Distortion and sink marks can also be minimized.
Optical parts with an aspherical surface such as an aspherical lens can also be easily formed in the same way as in the case of a spherical surface by making the shape of the master aspherical. The biggest problem with this method using a master is that after forming a resin layer between the master and the glass substrate, when separating the master and the glass substrate, the resin layer and the master damage the optical surface of the resin layer. The problem is that it is not easy to separate. Conventionally, in order to deal with this problem, there has been a method of mixing into the resin material a substance that prevents adhesion to the master and facilitates mold release, such as silicone oil and various waxes. These substances often have no or low compatibility with the resin material, and ooze out onto the surface of the molded resin layer to exert a mold release effect. Therefore, the mechanical properties, transparency, surface properties, etc. of the resin layer are often deteriorated. Furthermore, secondary processing such as adhering other optical components to the surface of the molded resin layer is not preferable because it reduces the adhesion of the adhesive. On the other hand, another commonly used method is to coat the surface of the master as a release layer without mixing the mold release agent into the resin material to prevent adhesion between the resin material and the master. As such a release layer, silicone oil,
Silicone grease, silicone varnish, carnauba wax, mineral wax, fluororesin powder or coating film, water-soluble resin, glycerin, various oil films, stearate, etc. are used. However, with these mold release agents,
A sufficient mold release effect could not be expected.
In particular, in conventional mold release agents, liquid monomers or oligomers such as acrylic resins and epoxy resins are often used as molding materials in precision molding of optical components such as lenses and mirrors. When such a liquid material is injected, especially in the case of a material with particularly good adhesive properties such as an epoxy resin, adhesion to the master is likely to occur. In addition, in the case of optical components, the molding accuracy of the surface of the resin layer is an issue, so it is desirable that the mold release layer be as thin as possible.However, with conventional mold release agents, it may not be possible to make it thin, or if it is made thin, it will not release partially. There was a problem with the mold layer peeling off. As one method for avoiding such difficulties, a method is conventionally known in which a vapor-deposited film of metal such as gold, silver, or copper is used as a release layer. To do this, first, these metals are formed as an extremely thin film on the master surface using methods such as sputtering or vacuum evaporation. A desired resin material is poured onto this by casting, for example, and the mold is released. At this time, the metal vapor deposition layer for mold release adheres to the surface of the molded product and is removed from the mold. Therefore, as the next step, it is necessary to remove the metal film of the mold release layer that adheres to the surface of the molded product.
Mechanical means such as chemically dissolving with alkali, etc., or peeling off using adhesive tape, etc. are used. As a result, the surface of the molded product is affected by the chemicals, causing problems such as roughness and scratches, as well as the need for a step to remove the mold release layer. Accordingly, the present invention provides a method for manufacturing an optical component having a surface with high optical precision by using a mold release layer that has good mold release properties, excellent sustainability of mold release action, and can be formed thinly. The main purpose is to The present invention involves forming a resin layer on the surface of the glass substrate by interposing a resin in the gap formed between the master having a release layer on the surface and the glass substrate, and then separating the master and forming the resin layer between the glass substrate and the glass substrate. A method for manufacturing an optical component comprising: forming a release layer made of a compound having a fluorine-substituted hydrocarbon group and an alkoxysilane group or a halogenated silane group, and then forming the release layer in the presence of a polyhydric alcohol; This is characterized by treating the release layer so that the compound chemically bonds to the surface of the master. Typical embodiments of the method for manufacturing an optical component according to the present invention are shown in FIGS. 1 to 5. FIG. 1 shows a member on which a master 2 is fixed on a substrate 1 made of glass, metal, or the like. The surface of the master 2 has the optical surface precision to be molded, and is made of glass, metal, or the like. A release layer 3 is formed on this master 2 as shown in FIG. This release layer is formed of a compound having a fluorinated hydrocarbon group and an alkoxysilane group or a halogenated silane group. On the other hand, as shown in FIG. 3, a glass substrate 4 is fixedly mounted on a support member 5, and a small amount of resin 6 is dropped onto the glass substrate 4. Next, as shown in FIG. 4, by stacking the master 2 on the glass substrate 4, the resin fills the gap between the master 2 and the glass substrate 4 and solidifies, forming a resin layer 8. A desired gap between the master and the glass substrate is secured by the spacer 7. Next, by separating the master 2 from the glass substrate, a resin layer 8 and a glass substrate 4 having an optical surface as shown in FIG.
It is possible to form an optical component consisting of When the surface of the master is flat, spherical, or aspheric, optical parts such as filters, spherical lenses, aspheric lenses, mirrors, spherical mirrors, and aspheric mirrors can be molded. In the case of a mirror, it can be formed by forming a resin layer and then depositing a metal such as Al or Ag on it. A typical mold release agent used in the present invention is one having a fluorine-substituted hydrocarbon group and an alkoxysilane group (1) or a halogenated silane group (2) represented by the following general formula. -Si(OR〓) _o R〓(3-n) -(1) -SiX _n R〓(3-m) -(2) Here, R〓 and R〓 are alkyl groups (e.g.
methyl group, ethyl group, propyl group, butyl group, etc.), n and m are 1, 2 or 3, and R is an alkyl group (e.g. methyl group, ethyl group, propyl group, butyl group, etc.) or an alkoxy group (e.g. ,
Methoxy group, ethoxy group, butoxy group, etc. (X is a halogen atom (e.g. Cl, Br, I)
It is. Furthermore, if two or more R〓, R〓, R〓 or X are bonded to Si, within the range of the above groups or atoms, for example, two R〓 are an alkyl group and an alkoxy group. They can be different. Examples of fluorine-substituted hydrocarbon groups include CF ₃ (CF ₂ ) a-groups and others at one end of the molecular structure.

A fluorine-substituted hydrocarbon group having a perfluoro group (a and a' are integers) such as [Formula] group is preferable, and the length of the perfluoro group is preferably 2 or more carbon atoms, and CF ₃ ( CF ₂ )a-
The appropriate number of _two CF units for each CFC is five or more. Also, perfluoro groups do not need to be linear,
for example

It may have a branched structure as shown in [Formula]. In this case, a' is preferably 4 or more. As described above, the mold releasability in the present invention is exerted by this perfluoro group. One end of the mold release agent used in the present invention that does not have a perfluoro group has at least one alkoxysilane group or halogenated silane group. The alkoxysilane group -SiOR〓 and the halogenated silane group -SiX react with moisture to form -SiO, which then undergoes dehydration condensation or hydrogen bonding with the -OH group present on the surface of the mold material such as glass or metal. raise and combine. In other words, the mold release agent used in the present invention chemically bonds to the surface of the molding master at one end, and has perfluoro groups oriented at the other end to cover the master mold surface, making it thin, durable, and uniform. A mold release layer can be formed. The perfluoro group and the silicon atom of the alkoxysilane group or halogenated silane group may be directly bonded as structural units such as -( _CH2 )l-, -O-
( _CH2 )l-O-, -NH-( _CH2 )l-NH-, -
( _CH2 )-O-( _CH2 )-l-, -( _CH2 )l-NH-
( _OH2 )l-, -CONH-( _CH2 )l-, -COO
They may be bonded via a structure such as (CH ₂ )l-. These structures should be as short as possible.
is preferably 3 or less. Specific examples of compounds include the following. (1) CF ₃ − (CF ₂ ) ₇ − (CH ₂ ) ₃ −NH− (CH ₂ ) ₃ −Si
(OCH ₃ ) ₃ (2) CF ₃ −(CF ₂ ) ₇ −O−(CH ₂ ) ₃ −O−Si
(OCH ₃ ) ₃ (3) CF ₃ − (CF ₂ ) ₇ −NH− (CH ₂ ) ₃ −NH−Si
(OCH ₃ ) ₃ (4) CF ₃ −(CF ₂ ) ₇ −(CH ₂ ) ₃ −O−(CH ₂ ) ₃ −Si
(OCH ₃ ) ₃ (5) CF ₃ − (CF ₂ ) ₆ −CONH− (OH ₂ ) ₃ −SI
(OC ₂ H ₅ ) ₃ C (6) CF ₃ − (CF ₂ ) ₇ − (CH ₂ ) ₃ −Si(OCH ₃ ) ₃ (7) CF ₃ − (CF ₂ ) ₆ −COO− (CH ₂ ) ₃ −Si(OCH ₃ ) ₃ (8) CF ₃ −(CF ₂ ) ₇ −(CH ₂ ) ₃ −NH−(CH ₂ ) ₃ −
SiCl ₃ (9) CF ₃ −(CF ₂ ) ₇ −O−(CH ₂ ) ₃ −O−SiCl ₃ The above-mentioned fluorine mold release agent is usually solid, but in order to apply it to the master surface, it needs to be dissolved in an organic solvent. Although it varies depending on the molecular structure of the mold release agent, in most cases, a fluorinated hydrocarbon solvent or a mixture thereof with some organic solvent is suitable. For example, CCl ₂ F−
_CCl2F , _CCl2F - _CClF2 , or a mixture of these with a compatible organic solvent such as methanol, ethanol, acetone, or trichlorethylene can be used. The concentration of the solvent is not particularly limited, but since the required release film is particularly thin, a low concentration is sufficient, and may be 1 to 3% by weight. To apply this solution to the surface of the master, conventional coating methods such as dip coating, spray coating, brush coating, etc. can be used. It is particularly undesirable for optical components to have dust and dirt attached to them, so it is necessary to remove dust from the coating solution, coating atmosphere, mold itself, etc. After coating, the solvent is usually evaporated by air drying to form a dry coating film.The thickness of the coated film at this time is not particularly limited, but is suitably 20 μm or less. In order to make the mold release layer strongly adhere to the master surface, it is effective to treat the mold release agent in the presence of a polyhydric alcohol so as to bond the mold release agent to the master surface. Examples of treatments for this include treatment with amines or acids. For example, a master coated with a release agent is heat-treated in a treatment solution containing an amine. The amine used here may be any of primary amines, secondary amines, and tertiary amines, but primary amines and secondary amines are particularly effective. Specifically, for example, primary amines such as ethylamine, propylamine, butylamine, amylamine, and hexylamine, and diethylamine and the like are examples of secondary amines. All of these amines are water-soluble amines and are soluble in water up to at least 20% by weight. These amines diffuse into the mold release layer from the treatment solution, react with the alkoxysilane or halogenated silane groups of the mold release agent, and cause -
Since its purpose is to promote dehydration condensation with OH, it is suitable that the molecular structure is as simple as possible, has a small molecular weight, and can easily diffuse into the mold release agent layer. The concentration of these amines is 15% by weight
Desirably, a content of about 0.5 to 3% by weight is suitable. Another effect of this treatment liquid is the -
Since the purpose of this process is to hydrolyze Si-OR or SiX to -SiOH, it is necessary that this treatment liquid contains water. Therefore, an aqueous solution of amine is used as the treatment liquid. The treatment in this treatment solution is 0.5 at a temperature of 60-95℃.
It is preferable to carry out the treatment for about 3 hours. A high temperature is better in terms of a reaction accelerator, but 95
If the temperature exceeds .degree. C., the water will boil and bubbles will be generated violently, attacking the master surface and mechanically causing the release agent layer to fall off, so as mentioned above, the appropriate temperature is 60 to 95.degree. Further, in a preferred embodiment of the present invention, an aqueous solution of an amine compound or an acid is applied to the surface of the master in advance, and after drying, at least a perfluoro group and an alkoxysilane group or a halogenated silane group are applied as described above. A mold release film can also be formed by applying a mold release agent having the following properties. The amine is applied to the surface of the master in advance during the mold release process, and at this time, it forms a hydrogen bond or simply adsorbs with the -OH group present on the surface of the glass or metal used as the master material. and bond to the master surface.
Next, a mold release agent is applied on top of this, and when the hot water treatment described below is performed, the terminal − of the mold release agent molecular structure is
These amines exert a catalytic effect when hydrolyzing SiOR or -SiX to -SiOH and further causing dehydration condensation with -OH on the mold surface. Therefore, since the presence of water is essential, it is appropriate to use the amine used in advance as an aqueous solution. However, the mold release agent used next is not compatible with water, so if the surface of the master is wet with liquid water or amine after this amine treatment, it must be separated from the solution when applying the mold release agent. The molding agent precipitates and a uniform coating cannot be obtained. Therefore, it is necessary to dry the master after applying the amine solution. However, it is meaningless to completely eliminate amines from the mold surface, so drying is done by air drying or
It should be stopped for a short time at a temperature of ~70℃. Then pre-apply the amine like this,
The process of applying the above-mentioned mold release agent onto the dried master is used. After the release agent has been applied to the master, it is then treated in hot water. In this treatment, water is diffused onto the master surface through the mold release agent layer, hydrolyzing the alkoxysilane groups or halogenated silane groups in the mold release agent mentioned above together with the pre-applied amine, and hydrolyzing the -OH of the master surface. This is a necessary treatment to promote the chemical reaction that bonds with the group. Therefore, a higher temperature is preferable for the purpose of promoting the reaction, but care must be taken because if the water boils, the mold release layer will be destroyed by bubbles and pinholes will occur. Therefore, a preferable treatment temperature is 60 to 95°C, and a preferable treatment time is about 0.5 to 3 hours to obtain good results. In another preferred embodiment of the present invention, a mold release treatment agent having at least a perfluoro group and an alkoxysilane group or a halogenated silane group is applied onto the master, and then the mold is released by immersion in an aqueous acid solution. layers can be formed. The mold after application of the mold release agent is heat-treated, especially in an aqueous acid solution. As the acid used here, inorganic acids such as hydrochloric acid, nitric acid, sulfuric acid, and phosphoric acid, and organic acids such as formic acid, acetic acid, oxalic acid, and toluenesulfonic acid can be used. These acids diffuse through the mold release agent coating from the treatment solution, reach the interface with the master surface, react with the alkoxysilane groups or halogenated silane groups of the mold release agent, and hydrolyze them to form -SiOH. It also acts as a catalyst to cause condensation with the -OH groups present on the master surface. At this time, the presence of water is necessary to convert -SiOR〓 or -SiX to -SiOH, so these acids are used as an aqueous solution, the concentration of which is 5% by weight or less, and the pH of the treatment liquid is It is desirable that the concentration be 3.0 or lower. The processing conditions in this processing solution are 60 to 95°C for about 0.5 to 50 hours. A high temperature is preferable for the purpose of promoting the reaction, but if the temperature exceeds 95°C, boiling will occur and the mold release agent may fall off due to bubbles, which is not preferable. Both amines and acids are treated as an aqueous solution, but the treatment conditions at this time are preferably as high as possible from the standpoint of reaction acceleration; on the other hand, when the treatment solution boils, bubbles cause the mold release layer to fall off. There is a risk of being exposed. For this purpose, the treatment is performed at a temperature of about 60 to 95°C for, for example, 0.5 to 50 hours. However, even if severe boiling does not occur, many small bubbles may be generated on the surface that has been subjected to mold release treatment. This phenomenon occurs even at relatively low temperatures, such as 60°C. Since the surface of the master coated with a mold release agent is hydrophobic, such air bubbles once generated cannot be easily removed due to their surface energy even by mechanical stirring or the like. Further, even if the air bubbles that have been generated are completely removed by taking the master out of the processing liquid, removing moisture, and then putting it back into the processing liquid, the air bubbles will continue to form again. Naturally, the part of the release layer to which air bubbles have adhered cannot be brought into contact with the treatment liquid, and therefore the chemical treatment described above does not proceed. In some cases, bubbles may be generated not from the surface of the release layer but from inside the release layer, creating holes in the release layer and exposing the underlying layer. Therefore, as a medium for the amine or acid treatment liquid, a polyhydric alcohol such as ethylene glycol, polyethylene glycol, glycerin, etc., which has a high boiling point and is completely compatible with water, such as dihydric alcohol or trihydric alcohol, is used. That is, the treatment solution is a solution obtained by dissolving an amine or an acid required for the above reaction in a polyhydric alcohol. As a result of various experiments, it was found that the water content has an important relationship with bubble generation.The concentration of water dissolved in the polyhydric alcohol was set at 15% by weight or less.
A preferable result is obtained when the amount is 5% by weight or more. The concentration of the amine or acid used in the treatment may be adjusted to several percent by weight as required. The above describes a method in which a mold release layer is applied directly onto a master, but in addition to this, a method has also been developed in which a mold release agent is applied after the master is previously treated with an amine solution or an acid solution. In this case, after applying the mold release agent, heat treatment is performed using only water in the same process as in the above two methods, but small air bubbles are generated at this time as well, and the behavior of the air bubbles is exactly the same as above. It is. Therefore, when using this method, during the heat treatment after applying the mold release agent, instead of treating with water alone, for example, the above polyhydric alcohol is used.
A solution containing 15% by weight or less and 5% by weight or more of water is used. By doing so, a release layer without pinholes or defects can be formed on the mold without generating bubbles during processing. The mold release layer thus formed is subjected to a thinning treatment, if necessary. This thin film treatment is performed by removing the other mold release agents while uniformly leaving at least a small amount of the mold release agent that adheres to the master surface through chemical bonds through the above-mentioned amine or acid treatment. do by doing. This removal method may be selected as appropriate, such as rubbing the release layer or dissolving the surface of the release layer with a solvent, but in particular, ultrasonic cleaning by placing it in a fluorinated hydrocarbon-based solvent, etc. It is preferable that the excess mold release agent is dissolved or the resin is once cured on the surface of the mold release layer and then separated so that only the thin mold release layer bonded to the master surface remains without being removed. In some cases, a layer may be added after this to promote bonding with the master surface and create an even stronger release layer.
Heat treatment may be performed at a temperature of 100 to 150°C for 1 to 2 hours. Examples of the resin for forming the resin layer include acrylic monomers or oligomers such as methyl methacrylate, styrene or mixtures of comonomers for the purpose of copolymerization mainly based on styrene, or oligomers thereof, epoxy resins, unsaturated polyester resins, etc. Materials such as prepolymers can be used. Example 1 A master member (approximately 25 mm in diameter) whose surface has been polished to an aspherical surface is adhered to a circular substrate of BK-7 glass with a diameter of approximately 50 mm and a thickness of 10 mm using an epoxy adhesive. This was immersed in a solution in which the fluorine-based organic siloxane compound FS-116 (trade name, manufactured by Daikin Industries, Ltd.) was diluted approximately three times with the fluorine-based solvent Daiflon S-3 (manufactured by Daikin Industries, Ltd., trade name). Apply FS-116 evenly to the surface and dry naturally. Next, it was treated at 90° C. for 1 hour in a treatment solution consisting of 1% by weight of n-propylaion, 5% by weight of water, and 94% by weight of ethylene glycol. During this treatment, no bubbles were observed on the surface to be treated. After wiping off the water droplets, the master pulled up from the treated solution was placed in Daiflon S-3 and subjected to ultrasonic cleaning for about 3 minutes. After ultrasonic cleaning, the excess FS-116 was removed and the surface was visually indistinguishable from the untreated surface. Next, as shown in FIG. 3, a glass substrate 4 made of lens-shaped SF-4 glass with a concave spherical surface is placed in the center of the brass support member 5, and the master placed on top of the glass substrate 4 is connected to the glass substrate 4. Approximately 0.3mm at the largest part between
Place the spacer 7 prepared so as to create a gap of about 0.1 mm at the smallest part. Next, a small amount of transparent epoxy resin Epotek 301-2 (manufactured by Epoxy Technology Co., Ltd., trade name) was placed in the recessed part of the glass substrate.
Insert the master from above as shown in FIG. This is placed in a constant temperature bath and heated at 80°C for 3 hours to harden the resin, slowly cooled, and then taken out. Next, when the master is pulled out from the support member 5, the glass substrate is attached to the surface of the master via the hardened epoxy resin, and the master is taken out. By applying a razor blade along the surface of the master and applying a slight impact, the glass substrate can be easily released from the master along with the hardened resin layer, forming a lens made of the glass substrate and resin layer as shown in Figure 5. It was done. The surface of this aspherical lens is an extremely precise aspherical surface, making it an excellent optical component. Using this master, lenses were molded without additional mold release treatment, and mold release was possible up to 7 times. Incidentally, the infrared absorption spectrum of FS-116 is shown in FIG. As is clear from this chart, FS-116 has CF ₃ (CF ₂ ) n group and Si
(OCH ₃ ) ₃ groups. In the figure, 11 is the vibration spectrum of C-F, and 12 is
13 shows the vibrational spectrum of SiOCH ₃ and SiO. Example 2 In Example 1, the master coated with FS-116 was treated with n-propylamine/water/ethylene glycol solution, and then the master was treated with an n-propylamine/water/ethylene glycol solution without performing ultrasonic cleaning in Daiflon S-3. A lens molding experiment similar to 1 was conducted. It is extremely easy to release the lens after molding, and it can be removed for up to 7 days without any additional release process.
I was able to release the mold up to 3 times. On the surface of the molded lens, some interference fringes were observed in the first molded lens, but after the second molding, there were no abnormalities and the surface was in good condition. Example 3 Special silane LP-8T for liquid crystal alignment (manufactured by Shin-Etsu Chemical Co., Ltd., trade name) having the chemical structure of n-C ₈ F ₁₇ CH ₂ CH ₂ Si (OCH ₃ ) ₃ was treated with Daiflon S-3. A solution having a concentration of 2% by weight was used in place of FS-116 in Example 2, and a lens molding experiment was conducted in exactly the same manner as in Example 2. It was extremely easy to release the master from the molded lens by applying a razor blade to the surface of the master and applying a slight impact. Furthermore, when molding was continued without additional mold release treatment, mold release was possible up to 7 times.
The precision of the resin surface of the molded lens showed the same excellent precision as the master, except for the first time.
In the first experiment, only about 1/2λ was observed in the optical interference fringes. Example 4 The coating treatment of the master used in Example 1 was performed using a Daiflon S-3 solution containing approximately 2% by weight of the fluorine-based organosiloxane compound C ₇ F ₁₅ CONHCH ₂ CH ₂ CH ₂ SI (OCH ₃ ) ₃ . I went. this
HCl3% by weight, water 5% by weight, ethylene glycol
The sample was treated at 90°C for 1 hour in a treatment solution having a composition of 92% by weight. No bubbles were observed on the master surface during this treatment. Thereafter, this was placed in Daiflon S-3 and subjected to ultrasonic cleaning for about 3 minutes to wash off the above-mentioned compound adhering to the master surface, and the appearance was exactly the same as the untreated master surface. When a lens was molded using this master in the same process as in Example 1, the lens could be released from the mold very easily. This mold release effect was effective up to seven times, and the precision of the resin surface of the molded lens was extremely good. Example 5 Application of Meister used in Example ₁ using about 2% by weight Daiflon S-3 solution of fluorine-based organosiloxane compound C ₇ F ₁₅ COOCH ₂ CH ₂ CH ₂ Si(OCH ₃ ) 3 I processed it. This is n
-Butylamine 1% by weight, water 5% by weight glycerin
It was placed in a treatment solution having a composition of 94% by weight, and heat treated at 90°C for about 1 hour. Thereafter, this was placed in Daiflon S-3 and subjected to ultrasonic cleaning for about 5 minutes to wash off the above compound adhering to the master surface, and the surface exhibited an appearance that was completely indistinguishable from that of the untreated master. . When a lens similar to that in Example 1 was molded using this master, the lens could be released from the mold very easily. This mold release effect remained effective up to seven moldings. Furthermore, the precision of the surface after molding was extremely high, and the surface of the master was faithfully transferred. Example 6 A master member shown in FIG. 1 was made into one piece by grinding using YSS maraging steel YAG (manufactured by Hitachi Metals Co., Ltd., trade name) as a metal material for molds. The master surface part has an aspherical polished finish. This master is approximately 3% by weight of FS-116.
This was applied by dipping into a Daiflon S-3 solution, and then placed in a treatment solution consisting of 1% by weight of n-butylamine, 5% by weight of water, and 94% by weight of ethylene glycol, and heat-treated at 90°C for about 1 hour. Ivy. This was placed in Daiflon S-3 and subjected to ultrasonic cleaning for about 5 minutes. The master surface had the same appearance as the untreated one. Using this master, lenses were molded in the same process as in Example 1. When the molded lens and master were released from the mold using a razor blade, it was possible to release the mold very easily. This master could be released from the mold up to seven times without additional mold release treatment, and showed excellent surface accuracy with faithful transfer of the master surface in each case. Comparative Example 1 A silicone paste mold release agent KS-61 (manufactured by Shin-Etsu Chemical Co., Ltd., trade name) was applied to the surface of the master used in Example 1 using a nonwoven fabric. At this time, the master was heated to about 60°C, and the mold release agent was wiped off to make the master surface as smooth as possible. Using this master, lenses were molded by the process shown in Example 1. After the resin had hardened, an attempt was made to release the mold using a razor blade, but although some peeling occurred, the lens could not be removed. Comparative Example 2 Silicone varnish mold release agent KS-700 (manufactured by Shin-Etsu Chemical Co., Ltd.,
(trade name) diluted approximately 10 times with n-hexane was applied. This was wiped clean using a non-woven cloth so as not to impair the precision of the optically curved surface, then baked at 270°C for 1 hour and then slowly cooled. Next, when a lens molding experiment similar to that in Example 1 was carried out using this master, the lens had insufficient mold releasability and cracks appeared in the glass substrate of the striking part of the razor blade. Comparative Example 3 The master used in Example 1 is heated to about 80°C, and carnauba wax (melting point about 65°C) is rubbed onto the surface of the master and applied while melting. Next, use a non-woven cloth to wipe off any excess carnauba wax that has adhered and melted, and wipe the surface to a smooth treated surface before returning it to room temperature. Lenses were molded using this master in the same manner as in Example 1, but the mold release was insufficient and some of the lenses were broken. On the resin surface of the lens in the area where the mold was released, minute irregularities due to uneven wiping of the mold release agent were seen in the reflected image of the surface.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a master used in the present invention. FIG. 2 is a sectional view of a master with a release layer formed on its surface. FIG. 3 is a sectional view of a glass substrate placed on a support member to form an optical component. FIG. 4 is a cross-sectional view of the glass substrate and master stacked together. FIG. 5 is a cross-sectional view of the formed optical component. FIG. 6 is a graph showing the infrared absorption spectrum characteristics of the mold release agent used in the examples. 1...Substrate, 2...Master, 3...Release layer,
4...Glass substrate, 5...Supporting member, 6...Resin, 7...Spacer, 8...Resin layer.

Claims (1)

[Claims] 1. After forming a resin layer on the surface of the glass substrate by interposing a resin in the gap formed between the master having a release layer on the surface and the glass substrate, the master is separated and the glass substrate is removed. In a method for manufacturing an optical component consisting of a substrate and a resin layer, after forming a release layer made of a compound having a fluorine-substituted hydrocarbon group and an alkoxysilane group or a halogenated silane group, release is performed in the presence of a polyhydric alcohol. A method for manufacturing an optical component, comprising treating a mold release layer so that a compound forming the mold layer is chemically bonded to the master surface. 2. Formed by applying a compound having a fluorine-substituted hydrocarbon group and an alkoxysilane group or a halogenated silane group to the master surface, and then leaving part of the applied compound uniformly over the entire master surface and removing the other part. The method for manufacturing an optical component according to claim 1, which is a release layer.