JP2012159526A - Method for manufacturing spectacle lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide means for forming a uniform coating layer by using a spin coat method.SOLUTION: Provided is a method for manufacturing a spectacle lens including forming a coating layer by applying coating liquid to a surface to be coated on a lens base material by using a spin coat method. Coating by using the spin coat method is performed in a state where a side surface of the lens base material is held in contact with an inner peripheral surface of a holding member having an annular opening containing a discontinuity area penetrating to an outside in the inner peripheral surface. In the state where the side surface is held, a partial area of a peripheral end part of the surface to be coated faces the discontinuity area, and the peripheral end part of the surface to be coated and an end part of the opening of the holding member forms a level difference in a state where the end part of the opening is at a high position in a vertical direction.

Description

  The present invention relates to a method for manufacturing a spectacle lens, and more particularly to a method for manufacturing a spectacle lens capable of providing a high-quality spectacle lens having a uniform coating layer.

  In general, a spectacle lens achieves a desired refractive index by a lens base material, and various performances (light control performance, antireflection performance, durability improvement, etc.) are imparted by a functional layer provided on the base material. . As a method for forming such a functional film, a spin coating method is widely used (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 5-19103

Many of the spin coaters currently on the market are coated with a holding member having a mechanism for holding the peripheral portion of the coated surface with a chuck claw or a holding member having a mechanism for sucking and holding the back surface of the coated surface with a suction pad. An object is fixed on the spin coater. However, when gripping with a chuck claw, an unpainted residue called sink is generated in a portion that has been in contact with the nail, so that the coating liquid cannot be uniformly applied to the entire surface to be coated. On the other hand, according to the holding by the suction pad, since the holding member does not touch the surface to be coated, it is possible to avoid the occurrence of partial unpainting at the peripheral edge of the surface to be coated. However, in the spin coating method, a centrifugal force is applied from the central part to the peripheral part in the coating liquid applied on the lens base material, so that a liquid pool tends to occur at the peripheral part. As a result of insufficient drying of the portion where such a liquid pool is generated, the liquid is insufficiently adhered and easily peels off. Although holding by an adsorption pad can prevent partial sinking, it is difficult to prevent liquid pooling.
Therefore, if the rotational speed at the time of spin coating is increased in order to blow off the liquid pool from the peripheral portion, the formed coating layer becomes thin and uneven coating occurs, resulting in unpainted areas called sink marks all around the peripheral portion. May end up.
The coating unevenness as described above becomes manifest as color unevenness in the coating layer (pigment layer) containing the coloring matter, which causes a reduction in the quality of the spectacle lens. In addition, if uneven coating occurs in a polarizing layer that exhibits a good polarizing function by uniformly arranging dichroic dyes, it causes a lack of polarizing function. Accordingly, when forming the dye layer by spin coating, it is required to realize uniform coating without uneven coating.

  Therefore, an object of the present invention is to provide means for forming a uniform coating layer by spin coating.

As a result of repeated studies to achieve the above object, the present inventor places the lens base material in the opening of the annular holding member so that the peripheral edge of the coated surface is lower than the edge of the holding member opening. It was found that sinking can be prevented at the peripheral edge by fitting. This is presumably because the inner peripheral surface of the holding member becomes a wall during spin coating, and it is possible to suppress excessive removal of the coating liquid from the surface to be coated. However, although the above method can prevent sink marks at the peripheral edge, it has not been possible to prevent liquid pooling from occurring at the peripheral edge.
Accordingly, as a result of further earnest studies, the present inventors have surprisingly found that the formation of a liquid pool can be prevented by providing a slit or a hole in a part of the annular holding member. This is because the liquid pool at the periphery of the surface to be coated is thought to be generated by isotropically applying centrifugal force around the entire periphery. The inventor speculates that the isotropic property is lost because a part is not surrounded by a wall and is is not surrounded by a wall.
The present invention has been completed based on the above findings.

That is, the above object has been achieved by the following means.
[1] A method for producing a spectacle lens, comprising: applying a coating solution on a surface to be coated on a lens substrate by spin coating to form a coating layer,
In the state where the side surface of the lens substrate is held in contact with the inner peripheral surface of the holding member having an annular opening including a discontinuous region penetrating to the outside on the inner peripheral surface, the application by the spin coating method is performed. Done
In the held state, a part of the peripheral edge of the coated surface is opposed to the discontinuous area, and the peripheral edge of the coated surface and the opening edge of the holding member are perpendicular to the vertical direction. The method of manufacturing a spectacle lens according to claim 1, wherein a step is formed in a state where the end of the opening is at a high position.
[2] The method for manufacturing a spectacle lens according to [1], wherein the coating solution is a polarizing layer forming coating solution containing a dichroic dye.
[3] The method for manufacturing a spectacle lens according to [1] or [2], wherein the surface to be coated has a convex shape.

  According to the present invention, a high-quality spectacle lens having a uniform coating layer can be provided.

FIG. 1 is a schematic perspective view showing an example of a holding member that can be used in the present invention. FIG. 2 is a schematic perspective view showing an example of a holding member that can be used in the present invention. FIG. 3 is a partial schematic cross-sectional view showing a state in which the lens base material is held by the holding member. 4 is a schematic cross-sectional view showing a state in which the lens base material is held by the holding member shown in FIG. 1, and a lower view in FIG. 4 is a schematic view showing a state in which the lens base material is held by the holding member shown in FIG. It is sectional drawing. FIG. 5 is a photograph of the polarizing lens produced in Example 1 and Comparative Example 2 taken with a digital camera under a fluorescent lamp. The upper diagram in FIG. 5 is a photograph of the entire lens, and the lower diagram in FIG.

The present invention relates to a method for manufacturing a spectacle lens including applying a coating liquid on a surface to be coated on a lens substrate by spin coating to form a coating layer. In the eyeglass lens manufacturing method of the present invention, the side surface of the lens base material is held in contact with the inner peripheral surface of the holding member having an annular opening including a discontinuous region penetrating to the outside on the inner peripheral surface. In this state, coating is performed by the spin coating method. In the held state, the peripheral edge of the surface to be coated has a partial area facing the discontinuous region, and the peripheral edge of the surface to be coated and the opening edge of the holding member are in the vertical direction. On the other hand, a step is formed in a state where the end of the opening is at a high position.
According to such a method for manufacturing a spectacle lens of the present invention, the inner peripheral surface of the holding member becomes a wall, and the application liquid is prevented from being excessively removed from the peripheral portion of the surface to be coated, thereby causing sink marks at the peripheral portion. Can be prevented. In addition to this, it is possible to prevent a liquid pool from being generated at the peripheral portion of the coated surface due to the discontinuous region provided on the inner peripheral surface of the holding member. As described above, according to the present invention, in the coating layer formed by the spin coating method, it is possible to prevent the occurrence of sink marks or liquid pools at the peripheral portion.
Hereinafter, the manufacturing method of the spectacle lens of the present invention will be described in more detail.

  In the eyeglass lens manufacturing method of the present invention, the surface (surface to be coated) to which the coating liquid is applied may be the surface of the lens substrate, or the surface of the coating layer formed on the lens substrate. . The surface shape of the surface to be coated can be any shape such as a flat surface, a convex surface, or a concave surface. Since the coating liquid applied on the convex surface tends to spread toward the peripheral edge as compared with a flat surface or on the concave surface, and the liquid pool tends to occur particularly easily, the present invention capable of reducing the liquid pool is a convex surface. It is particularly suitable for application to an embodiment in which a coating layer is formed on the coated surface.

  The lens substrate is not particularly limited, and materials usually used for the lens substrate of spectacle lenses, specifically, those made of plastic, inorganic glass, and the like can be used. The thickness and diameter of the lens substrate are not particularly limited, but are usually about 1 to 30 mm in thickness and about 50 to 100 mm in diameter.

  Next, a method for holding the lens substrate during application by spin coating will be described with reference to the drawings.

1 and 2 are schematic perspective views showing an example of a holding member that can be used in the present invention.
The holding member 1 shown in FIG. 1 has a side slit 12 on the side surface of the annular opening 11. As a result, a discontinuous region penetrating to the outside is formed on the inner peripheral surface of the annular opening 11.
The holding member 1 shown in FIG. 2 has a side hole 13 on the side surface of the annular opening 11 so that a discontinuous region penetrating to the outside is formed on the inner peripheral surface of the annular opening 11.

FIG. 3 is a partial schematic cross-sectional view showing a state in which the lens base material is held by the holding member.
As shown in FIG. 3, at the time of application by the spin coat method in the present invention, the opening end portion 110 of the annular opening portion of the holding member 1 is more perpendicular to the peripheral end portion 210 of the surface to be coated 21 on the lens substrate. On the other hand, it is in a high position. Thereby, the inner peripheral surface of the holding member becomes a wall at the time of spin coating, and it is possible to prevent the coating liquid from being excessively removed from the peripheral portion of the surface to be coated and the occurrence of sink marks at the peripheral portion. The vertical distance between the peripheral edge of the surface to be coated and the opening edge of the holding member (the distance between the arrows in FIG. 3) is the viscosity of the coating liquid to be used and the spin coating conditions (rotation speed, In consideration of the rotation time, etc., an appropriate amount of the coating solution may be determined so as to be held at the periphery of the coated surface. In consideration of the material and spin coating conditions used for the production of ordinary spectacle lenses, the distance is preferably about 0.1 mm to 5 mm, and more preferably about 0.5 mm to 1 mm. The holding member shown in FIG. 3 is provided with a stepped portion 14 inside the annular opening. In the aspect shown in FIG. 3, the lens base material is positioned and held by bringing the upper end portion of the stepped portion 14 into contact with the rear surface peripheral edge portion of the lens base material. This is advantageous in positioning the lens substrate at a desired position and stably holding the lens substrate during spin coating. Instead of the stepped portion, it is also possible to provide a ring-shaped protruding band along the circumferential direction of the inner peripheral surface, or to provide several protruding portions in the circumferential direction in order to maintain the positioning of the lens substrate. is there. Moreover, the lens base material inserted in the holding member opening can be stably held by its elasticity using a holding member made of an elastic material having an inner diameter slightly smaller than the outer diameter of the lens base material.

  However, as described above, when the peripheral edge portion of the surface to be coated is surrounded by the inner peripheral surface of the holding member over the entire circumference, a liquid pool is generated in the peripheral edge portion. On the other hand, in the present invention, a holding member having a discontinuous region penetrating to the outside is used in a part of the inner peripheral surface, and a partial region of the peripheral edge of the coated surface is opposed to the discontinuous region. The lens substrate is held by the holding member. Thereby, it can prevent that a liquid pool arises in a peripheral part. 4 is a schematic cross-sectional view showing a state in which the lens base material is held by the holding member shown in FIG. 1, and a lower view in FIG. 4 is a schematic view showing a state in which the lens base material is held by the holding member shown in FIG. It is sectional drawing. In the drawing, the lens base disposed in the annular opening of the holding member is indicated by a dotted line. Thus, by providing an opening area (slit, hole, etc.) on the side surface of the holding member, a discontinuous area penetrating to the outside can be provided on the inner peripheral surface of the holding member. By making the partial areas face each other, it is possible to prevent a liquid pool from being generated at the peripheral edge. The inventor speculates that this is due to the fact that the opposed portions break the isotropy of centrifugal force during spin coating.

  In the upper view of FIG. 4, a part of the side surface of the lens base is opposed to the side slit of the holding member so that the entire region in the thickness direction is open to the outside. However, in the present invention, it is not essential that the portion facing the discontinuous region on the side surface of the lens substrate is opened to the outside in the entire thickness direction. As shown in the lower part of FIG. 4, the upper part including the peripheral edge of the coated surface may be opened to the outside, and the lower part of the side surface may be in contact with the continuous region of the inner peripheral surface of the holding member. When a part of the side surface of the lens substrate is open to the outside over the entire thickness direction, the coating liquid blown off from the surface to be coated may wrap around the back surface of the lens substrate. In this case, as a post-process, a process of removing the wrapped coating liquid by wiping or the like is necessary. On the other hand, as shown in the lower diagram of FIG. 4, when only the upper part of the side surface of the lens base material is open to the outside, the coating liquid does not wrap around the back surface of the lens base material. This is advantageous. The number and size of the opening regions provided on the side surface of the holding member are not particularly limited. However, as the discontinuous region on the inner peripheral surface of the holding member increases, the stability of holding the lens substrate decreases. It is preferable to provide an opening region having a number and a size that can stably hold the. An area of about 5 to 30% (preferably about 5 to 10%) of the peripheral edge of the surface to be coated faces the discontinuous area and is opened to the outside. It is preferable for achieving both retention.

The holding member may be made of metal or resin. The holding member is preferably made of resin from the viewpoint of holding the lens base material inserted into the opening and easy removal after spin coating. The resin-made holding member can be usually obtained by molding a thermoplastic resin used for manufacturing a casting polymerization gasket by a known molding method such as injection molding. Opening regions such as slits and holes on the side surface of the holding member may be formed by cutting a part of the molded body having a cylindrical portion with a cutter or the like, or the holding member may be formed using a mold capable of forming the region. You may produce by shape | molding. From the viewpoint of ease of attachment to and removal from the annular opening, it is preferable that both the lens substrate to be held and the annular opening are circular in plan view.
Note that one end of the holding member used in the present invention is an opening as described above, but the other end may be open or closed. Further, the shape of the other parts is not particularly limited as long as the holding member has the above-described configuration.

  The holding member can be used by being fixed to a spin coater by a known chuck device such as a collet chuck.

  Application of the coating liquid onto the surface to be coated on the lens substrate can be performed by a normal spin coating method except that the holding is performed by the holding member. The spin coating method includes a method in which application is performed from the center of the surface to be applied toward the outer edge, and a method in which application is performed from the outer edge to the center. Any method may be adopted in the present invention. For the relatively low-viscosity coating solution, it is preferable to use the former method, and for the relatively high-viscosity coating solution, it may be difficult to uniformly spread the entire surface to be coated by centrifugal force. Therefore, it is preferable to use the latter method.

  The surface to be coated on which the coating liquid is applied may be the surface of the lens substrate or the surface of the coating layer formed on the surface of the lens substrate. In the latter case, a coating layer having a surface to be coated when held by a holding member as described above and applied by spin coating may be formed by application by the same spin coating method. The film may be formed by the spin coating method or other film forming methods (dip method, vapor deposition method, etc.). When manufacturing a spectacle lens having a plurality of coating layers, it is preferable to form at least a coating layer that is easily affected by sink marks or liquid pools by spin coating using a holding member as described above.

As the coating liquid applied to the surface to be coated in a state where the lens substrate is held by the holding member as described above, a functional film-forming coating liquid for providing desired performance to the spectacle lens is manufactured. What is necessary is just to select according to the specification of a lens. As described above, since uneven coating is a major cause of quality deterioration in the dye layer, the method for manufacturing a spectacle lens of the present invention that can suppress the occurrence of uneven coating is applied as a method for manufacturing a spectacle lens having a dye layer. It is preferable. Examples of the dye layer include a photochromic layer containing a photochromic dye, a polarizing layer containing a dichroic dye, and the like. Further, as described above, the occurrence of coating unevenness causes a lack of polarization function, and therefore, the method for manufacturing a spectacle lens of the present invention is applied as a method for manufacturing a polarizing lens having a polarizing layer containing a dichroic dye. Is particularly preferred.
Hereinafter, the polarizing layer containing a dichroic dye will be described in more detail.

  “Dichroism” means a property in which the color of transmitted light varies depending on the propagation direction because the medium has selective absorption anisotropy with respect to light. Light absorption increases in a specific direction of the dye molecule, and light absorption decreases in a direction perpendicular thereto. Among dichroic dyes, those that exhibit a liquid crystal state in a certain concentration and temperature range when water is used as a solvent are known. Such a liquid crystal state is called lyotropic liquid crystal. If the dye molecules can be arranged in one specific direction using the liquid crystal state of the dichroic dye, stronger dichroism can be expressed. A dichroic dye can be uniaxially oriented by forming a groove on the surface of the lens substrate or the arrangement layer and applying a coating solution containing the dichroic dye on the surface having the groove. A polarizing layer having excellent polarization can be formed.

  In the present invention, the dichroic dye used for forming the polarizing layer is not particularly limited, and examples thereof include various dichroic dyes usually used for polarizing members. Specific examples include azo, anthraquinone, merocyanine, styryl, azomethine, quinone, quinophthalone, perylene, indigo, tetrazine, stilbene, and benzidine dyes. Moreover, the thing etc. which are described in US Patent 24000877 specification and Japanese translations of PCT publication No. 2002-527786 may be used.

  The dichroic dye-containing coating solution can be a solution or a suspension. Since most dichroic dyes are water-soluble, the coating solution is usually an aqueous solution using water as a solvent. Although content of the dichroic pigment | dye in a coating liquid is about 1-50 mass%, for example, as long as desired polarization property is obtained, it is not limited to the said range.

  The coating liquid may contain other components in addition to the dichroic dye. Examples of other components include dyes other than dichroic dyes, and a polarizing lens having a desired hue can be produced by blending such dyes. Furthermore, additives such as a rheology modifier, an adhesion promoter, a plasticizer, and a leveling agent may be blended as necessary from the viewpoint of improving applicability and the like.

When a water-soluble dye is used as the dichroic dye, it is preferable to apply a water-insoluble treatment after coating and drying the coating liquid in order to improve film stability. The water insolubilization treatment can be performed, for example, by ion exchange of the terminal hydroxyl group of the dye molecule or by creating a chelate state between the dye and the metal ion. For this purpose, it is preferable to use a method in which the formed polarizing film is immersed in an aqueous metal salt solution. The metal salt that can be used is not particularly limited, and examples thereof include AlCl ₃ , BaCl ₂ , CdCl ₂ , ZnCl ₂ , FeCl _2, and SnCl ₃ . After the water-insoluble treatment, the surface of the polarizing layer may be further dried.

When the polarizing lens is manufactured according to the present invention, a known method can be applied without any limitation with respect to the details of the manufacturing process, except that the coating method is adopted. For example, reference can be made to JP-T-2008-527401, JP-A 2010-256895, JP-A 2010-134424, JP-A 2010-102234, and the like.
For the polarizing layer, in order to increase the film strength and stability, a dye protective layer can be formed (the dichroic dye is fixed) as described in the above publication. This immobilization treatment is desirably performed after the above water-insolubilization treatment. By the fixing treatment, the orientation state of the dichroic dye can be fixed in the polarizing film. Although the thickness of a polarizing layer is not specifically limited, Usually, it is about 0.05-5 micrometers. The dye protective film penetrates into the polarizing layer and is substantially contained in the polarizing layer.

  In the following, the present invention will be further explained by examples. However, this invention is not limited to the aspect shown in the Example.

[Example 1]
1. Production of Holding Member Using a polyethylene elastomer (Excellen FX, manufactured by Sumitomo Chemical Co., Ltd.), which is an olefinic thermoplastic resin, a cylindrical body having a recess having a depth of 12.5 mm was obtained by injection molding. The cylindrical body had an opening outer diameter of 82 mm, an opening inner diameter of 70 mm, and an inner diameter of 65.5 mm from a position 2.5 mm lower than the opening to form a stepped portion in the recess.
The holding member shown in FIG. 1 was obtained by producing eight slits with a width of 2 mm at equal intervals from the upper end to the lower end of the side surface of the obtained cylindrical body.

2. Formation of the alignment layer A phoenix lens (manufactured by HOYA Corporation, refractive index 1.53, with hard coat, diameter 70 mm, base curve 4) was used as the lens substrate, and the thickness was set to 0. A 2 μm SiO ₂ film was formed.
On the formed SiO ₂ film, an abrasive-containing urethane foam (abrasive: trade name POLIPLA 203A manufactured by Fujimi Incorporated, Al ₂ O ₃ particles having an average particle size of 0.8 μm, urethane foam: almost the same as the curvature of the convex surface of the lens. Shape) was applied for 30 seconds under conditions of a rotational speed of 350 rpm and a polishing pressure of 50 g / cm ² . The lens subjected to the polishing treatment was washed with pure water and dried.

3. Holding and fixing of lens substrate In the opening of the holding member produced in the above 2. The lens base material on which the alignment layer was formed was inserted with the convex surface facing upward. As a result, the lens substrate was positioned and held by the stepped portion inside the holding member at a position where the peripheral edge of the coated surface (array layer surface) was 0.5 mm lower than the opening edge of the holding member.
A collet chuck was attached to the bottom surface of the holding member holding the lens substrate as described above, and the lens substrate together with the holding member was fixed on the spin coater.

4). Formation of polarizing layer 2 to 3 g of a 5% by weight aqueous solution of a dichroic dye (trade name “Varilight solution 2S”, manufactured by Sterling Optics Inc.) on the surface of the array layer of the lens substrate fixed on the spin coater Was used to spin coat to form a polarizing layer. Spin coating is performed by supplying a dye solution from a dispenser disposed above the center of the surface of the array layer (for 10 seconds) at a rotation speed of 171 rpm, then holding at 285 rpm for 40 seconds, and then holding at 1000 rpm for 25 seconds. It was.
After spin coating, an aqueous solution of pH 3.5 having an iron chloride concentration of 0.15 M and a calcium hydroxide concentration of 0.2 M was prepared, and the lens obtained above was immersed in this aqueous solution for about 30 seconds, and then pulled up. It was thoroughly washed with pure water. By this step, the water-soluble dye is converted into hardly soluble.
Thereafter, the lens was immersed in a 10% by mass aqueous solution of γ-aminopropyltriethoxysilane for 15 minutes, washed with pure water three times, and thermally cured at 85 ° C. for 30 minutes. Further, after cooling, the lens was immersed in a 2% by mass aqueous solution of γ-glycidoxypropyltrimethoxysilane for 30 minutes in the air, and then cured in a furnace at 100 ° C. for 30 minutes and cooled after curing to form a dye protective film. Formation (immobilization treatment).

  Through the above steps, a spectacle lens (polarizing lens) having a polarizing layer with a thickness of about 1.0 μm was obtained.

[Comparative Example 1]
Above 1. A polarizing lens was produced in the same manner as in Example 1 except that no slit was formed.

[Comparative Example 2]
A polarizing lens was produced in the same manner as in Example 1 except that spin coating was performed in a state where the lens substrate was fixed by a chuck mechanism that held three peripheral edge portions of the coated surface and held by a chuck claw.

Confirmation of the occurrence of sink marks and liquid pools When the polarizing lens obtained by the above steps was visually observed under a fluorescent lamp, no liquid pool was observed at the peripheral portion of the polarizing layer surface of the polarizing lens prepared in Example 1. It was. Although the unpolarized portion of the polarizing layer (sink) was observed at the periphery of the lens, the sink width was 0.5 mm or less, which was a practically satisfactory level.
In the polarizing lens obtained in Comparative Example 2, sink marks having a width of about 2 to 3 mm were observed over the entire circumference of the periphery of the polarizing layer surface, and particularly, the sink marks were remarkably generated at locations held by the nails.
The photograph which image | photographed the polarizing lens produced in Example 1 and the comparative example 2 with the digital camera under the fluorescent lamp is shown in FIG. The upper diagram in FIG. 5 is a photograph of the entire lens, and the lower diagram in FIG. 5 is a partially enlarged photograph.
On the other hand, in the polarizing lens produced in Comparative Example 1, it was confirmed that a band-like region having a thick film thickness was formed due to liquid accumulation over the entire periphery of the polarizing layer. This is presumably due to the peripheral edge of the coated surface being surrounded by the inner circumferential surface of the holding member over the entire circumference.

Measurement of Polarization Efficiency and Transparency (Haze Value) The polarization efficiency and transparency (haze value) of the polarizing lens prepared in Example 1 were measured by the following method.
(1) Polarization efficiency Polarization efficiency (P _eff ) was evaluated by calculating parallel transmittance (T _// ) and vertical transmittance (T⊥) according to ISO 8980-3, and calculating by the following formula. Parallel transmittance and vertical transmittance were measured using a visible spectrophotometer and a polarizer.
P _eff (%) = [(T _{// −} T⊥) / (T _// + T⊥)] × 100
(Evaluation criteria)
A: Polarization efficiency over 98%, B: Polarization efficiency of 90% to 98%, X: Polarization efficiency of less than 90% (2) Transparency (haze value)
The haze value of the produced polarizing lens was measured with a haze meter MH-150 manufactured by Murakami Color Research Laboratory Co., Ltd., and the presence or absence of cloudiness was judged.
(Evaluation criteria)
○: No cloudiness (haze value ≦ 1.0%)
X: Cloudy (haze value> 1.0%)

  As a result of the above measurement, the polarizing lens produced in Example 1 was evaluated as “偏光” for the polarization efficiency and “◯” for the transparency (haze value). From this result, it was confirmed that a spectacle lens having high polarization efficiency and excellent transparency was obtained. As described above, when uneven coating occurs in the polarizing layer, the polarization function is insufficient. However, since the polarizing lens produced in Example 1 showed very good polarization efficiency, uniform polarization without uneven coating was achieved. It can be confirmed that a layer is formed.

  INDUSTRIAL APPLICABILITY The present invention is useful in the field of manufacturing eyeglass lenses having a dye layer, particularly eyeglass lenses having a polarizing layer containing a dichroic dye.

Claims (3)

A method for producing a spectacle lens, comprising forming a coating layer by applying a coating liquid on a surface to be coated on a lens substrate by a spin coating method,
In the state where the side surface of the lens substrate is held in contact with the inner peripheral surface of the holding member having an annular opening including a discontinuous region penetrating to the outside on the inner peripheral surface, the application by the spin coating method is performed. Done
In the held state, a part of the peripheral edge of the coated surface is opposed to the discontinuous area, and the peripheral edge of the coated surface and the opening edge of the holding member are perpendicular to the vertical direction. The method of manufacturing a spectacle lens according to claim 1, wherein a step is formed in a state where the end of the opening is at a high position. The method for producing a spectacle lens according to claim 1, wherein the coating solution is a polarizing layer forming coating solution containing a dichroic dye. The spectacle lens manufacturing method according to claim 1, wherein the surface to be coated has a convex shape.