JP5679858B2 - Spectacle inspection jig for spectacle lens and electrification inspection method for spectacle lens - Google Patents

Description

  The present invention relates to a spectacle lens charge inspection jig and a spectacle lens charge inspection method.

  Devices for inspecting the charged state of dielectric materials (insulators) such as plastic include surface resistance meters that measure the electrical resistivity of surfaces, and the potential between a glass plate and a conductor facing each other at a predetermined measurement distance. There is known a charged state measuring device for measuring the polarity and the charge amount of a glass plate from the measurement result and the measurement distance.

  A simple method for inspecting the charged state of the lens surface is, for example, whether the lens surface is pressed with a polyester cloth and rubbed a predetermined number of times, and the rubbed surface is brought close to a powdered foamed polystyrene. There is known a method for inspecting the charged / uncharged state of a lens depending on whether or not (see, for example, Patent Document 1).

JP 2009-85744 A

  However, a medium made of a fine dielectric material that adheres to the surface of a charged lens is an insulator. When the medium is charged, the other party is electrostatically adsorbed regardless of whether it is an insulator or a conductive substance. Therefore, in Patent Document 1, if the medium is not charged, it functions as an inspection jig. However, if the medium is charged, it may not function as an inspection jig.

  Here, a case where a conventional medium is used will be described. When the lens is charged, the same phenomenon as described above occurs, and the media is adsorbed to the lens. However, in this case, the media itself is easily charged. If the medium is charged, regardless of whether the lens is charged or not, as shown in FIG. 5, a charge having a polarity opposite to that of the medium is generated on the lens surface, and as a result, adsorbed on the lens. Since this medium is an insulator, once charged, the charged state is maintained for a long time. In order to solve this state, there are only methods such as ionizer irradiation and water application to the medium (reducing electrical resistance of the surface with water to release electric charges). For this reason, the apparatus becomes large, the weight of the media increases due to moisture adsorption, the medium is not attracted, and the humidity in the jig is increased, so that charging becomes difficult to occur and inconvenience occurs. Ordinary media is gradually charged by repeating vibration, movement, and adsorption.

  Static electricity is also affected by the environment. For example, when the humidity is high, static electricity is hardly generated, and when the humidity is 30% or less, static electricity is likely to be generated. This jig is designed as a store demonstration, and it is not desirable to conduct a test (demo) under the influence of the outside world (for example, it is difficult to generate static electricity in the summer, so the demonstration is demonstrated). It ’s hard.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a charging test for a spectacle lens capable of visually inspecting a charged state of a lens by a relatively simple method. An object of the present invention is to provide a charging inspection method for a jig and a spectacle lens.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  [Application Example 1] A container whose upper side is opened, a large number of substances formed by applying a conductive material on the surface of the dielectric, and a small granular dielectric housed in the container, and an opening of the container A spectacle lens placed with one optical surface facing down to cover the portion, and a static electricity generating member that presses and rubs against the other optical surface of the spectacle lens to generate static electricity in the spectacle lens. An electrification inspection jig for spectacle lenses characterized by the above.

  According to this, when the optical surface on the spectacle lens is rubbed by the static electricity generating member, triboelectricity (static electricity) is generated and the spectacle lens is charged. The amount of charge varies depending on the contact area between the static electricity generating member and the spectacle lens, the pressing force, the number of times of pressing and friction, and the amount of charge increases if the contact area and pressing force increase and the number of pressing and friction increases. Also grows. When the spectacle lens is charged, a substance made of a dielectric in the container is attracted by the spectacle lens and floats and adheres to the lower surface of the spectacle lens. The charged state of the spectacle lens can be inspected by visually observing the substance adhering to the lower surface of the spectacle lens through the spectacle lens.

  At that time, a conductive material was applied to the surface of the substance so that the substance was not charged. As a result, since the surface of the substance is conductively processed, electrons can move smoothly, and charge can be easily supplied to and released from the container. Can be used as a purpose. By using the present invention, charging of a substance can be prevented.

  In addition, in order to eliminate the influence of the environment during the charged state inspection, the eyeglass lens is covered with a lid, and the space where the substance exists is sealed. Thereby, it is possible to perform the charge inspection with good reproducibility by maintaining the low humidity. Therefore, it is a structure that improves reproducibility and stability optimal for demonstration at a store without being influenced by the environment.

  Furthermore, since the spectacle lens functions as a lid, the material is prevented from scattering. Further, since there is no net for preventing scattering of substances as in Patent Document 1, it is easy to observe.

  [Application Example 2] A charging inspection jig for spectacle lenses, wherein the conductive material is an antistatic agent.

  According to this, positive and negative charges generated in the dielectric move through the antistatic layer and neutralize, and the residual charges in the dielectric are reduced to prevent the substance from being charged.

  The antistatic layer preferably contains at least one of a siloxane antistatic agent, a surfactant antistatic agent and a polymer antistatic agent. According to these materials, film formation is easy, and there is an advantage that an appropriate specific resistance value can be easily obtained in terms of prevention of charging and prevention of leakage current.

  As the antistatic agent, an antistatic agent usually used for antistatic treatment of a fabric can be used. Specifically, aliphatic sulfonate, higher alcohol sulfate ester salt, higher alcohol ethylene oxide adduct sulfate ester, higher alcohol phosphate ester salt, higher alcohol ethylene oxide adduct phosphate ester salt, higher alcohol ethylene oxide adduct polyethylene glycol fatty acid ester And polyhydric alcohol fatty acid esters, quaternary ammonium salt cationic surfactants, or higher alcohol phosphate organic amines. These antistatic agents can be used alone or in combination of two or more.

  [Application Example 3] A charging inspection jig for spectacle lenses, wherein the antistatic agent is a surfactant.

  According to this, the hydrophilic group of the surfactant present in the substance surface layer attracts water vapor in the air, and a thin water layer is formed on the substance surface layer. This water layer imparts conductivity to the surface layer of the material (the surface resistance value (Ω / □) decreases), and discharge does not occur.

  Application Example 4 A charging inspection jig for spectacle lenses, wherein the substance is opaque or colored.

  According to this, since the substance is opaque or colored, it is easy to see the substance through the spectacle lens. In particular, when the container is colored in a color different from the color of the container or the covering member, the substance can be more easily recognized.

  Application Example 5 In the above-described spectacle lens charging inspection jig, the substance has a size of 1 to 5 mm and is formed in a spherical shape, an elliptical shape, an elliptical shape, or a cylindrical shape. A charging inspection jig for spectacle lenses.

  According to this, since the substance is formed in a spherical shape, an ellipse shape, an oval shape, or a cylindrical shape, the substances do not contact each other in a point or a line shape and are not hardened in a dam shape.

  In the present invention, “fine particles” refers to small pieces having a size of about 1 to 5 mm, and the shape of the particles is not particularly limited. Specific particle shapes include not only a solid shape having a curved surface such as a spherical shape, an elliptical shape, an oval shape, or a cylindrical shape, but also a flat surface obtained by cutting the sheet into an appropriate shape such as a square, a rectangle, or a polygon. The scale-like (lamellar) shape is also included in the “granular” shape here.

  [Application Example 6] A charging inspection jig for spectacle lenses, wherein the container is made of a conductive material.

  According to this, since the container having an open top is made of a conductive material, adhesion of substances to the inner wall of the container due to static electricity is suppressed. In addition, even when charged by friction between substances, charge flows into a container made of a conductive material, so that excessive charging of the substance is prevented.

  [Application Example 7] A small granular dielectric substance is housed inside and contains a large number of substances formed by applying a conductive material on the surface of the dielectric substance. Placing the other optical surface of the spectacle lens against the friction force by pressing the other optical surface of the spectacle lens with a static electricity generating member, and generating the static electricity on the optical surface of the spectacle lens, and the substance in the container is the spectacle lens And a step of visually recognizing whether or not it adheres to the lower surface of the eyeglass lens through the spectacle lens.

  According to this, when the optical surface on the spectacle lens is rubbed by the static electricity generating member, triboelectricity (static electricity) is generated and the spectacle lens is charged. The amount of charge varies depending on the contact area between the static electricity generating member and the spectacle lens, the pressing force, the number of times of pressing and friction, and the amount of charge increases if the contact area and pressing force increase and the number of pressing and friction increases. Also grows. When the spectacle lens is charged, a substance made of a dielectric in the container is attracted by the spectacle lens and floats and adheres to the lower surface of the spectacle lens. The charged state of the spectacle lens can be inspected by visually observing the substance adhering to the lower surface of the spectacle lens through the spectacle lens.

FIG. 2 is an exploded perspective view showing a spectacle inspection jig for spectacle lenses according to the present embodiment. FIG. 3 is a cross-sectional view of a charging inspection jig for spectacle lenses according to the present embodiment. FIG. 3 is a cross-sectional view illustrating a state in which the spectacle lens according to the embodiment has started to be charged. FIG. 3 is a cross-sectional view showing a state where the spectacle lens according to the present embodiment has been charged. Sectional drawing which shows the charged state of the conventional substance.

  The spectacle lens charging inspection jig according to the present embodiment is used to inspect whether or not the spectacle lens is charged.

  FIG. 1 is an exploded perspective view showing the spectacle lens charging inspection jig according to the present embodiment, and FIG. 2 is a cross-sectional view of the spectacle lens charging inspection jig according to the present embodiment. The spectacle lens charging inspection jig 2 according to the present embodiment covers the container 10 that opens upward, a large number of minute granular substances 16 housed in the container 10, and the opening 18 of the container 10. A spectacle lens 22 placed with the concave optical surface 20 facing down, and a static electricity generating member 26 that presses and rubs against the convex optical surface 24 of the spectacle lens 22 to generate static electricity in the spectacle lens 22. .

  The spectacle lens 22 has a convex optical surface 24 and a concave optical surface 20 by being formed in a meniscus shape with a circular outer shape of, for example, 75 mm. As the lens substrate of the spectacle lens 22, methacrylate resin, polyurethane resin, polycarbonate resin, acrylate resin, polyester resin, or the like is used. The eyeglass lens 22 also functions as a lid of the container 10 to prevent the substance 16 from scattering and to block the outside from the inside of the container 10 (maintaining low humidity).

  The spectacle lens 22 covers the opening 18 that opens above the container 10 and is used to prevent the substance 16 from jumping out of the container 10. The spectacle lens 22 has translucency and flexibility, and has spectacles. The insulating material or dielectric material having a softness that does not damage the lens 22 is formed in a circular shape larger than the outer shape of the container 10, the outer peripheral edge is bent along the upper end of the outer peripheral surface of the container 10, and is fixed by an adhesive. Yes.

  The container 10 prevents the substance 16 from scattering. The container 10 holds a spectacle lens 22. The container 10 is formed in a bottomed cylindrical shape opened upward by a dielectric material such as plastic or ceramic, or a conductive material such as SUS or aluminum, and has an outer diameter smaller than the outer shape of the spectacle lens 22 (for example, the spectacle lens 22 The outer diameter is 1/2 to 95/100). By using a dielectric material for the container 10, the container 10 itself is charged. Further, by using a conductive material for the container 10, the container 10 itself is not charged.

  The shape of the substance 16 is preferably formed in a rounded shape with few planes, for example, a spherical shape, an elliptical shape, an oval shape, or a cylindrical shape. In such a rounded shape, the substances 16 come into contact with each other in the form of dots or lines, so that they can be prevented from solidifying into large lumps.

  The size of the substance 16 is preferably in the range of 1 to 5 mm. If it is 1 mm or less, it is too small and is difficult to remove after adhering to the spectacle lens 22. If it is 5 mm or more, it becomes unhealthy because it becomes heavy and hardly adheres to the spectacle lens 22. When the substance 16 has an elliptical shape, an elliptical shape, or a cylindrical shape, the short diameter may be about 1 mm and the long diameter may be about 5 mm.

  The substance 16 is formed of a minute granular dielectric (media) 12 and a conductive material 14 applied to the surface of the medium 12. The medium 12 is preferably a light and large material (the fine particles are adsorbed for a long time because they are less affected by gravity when adsorbed on the surface).

  As the granular medium 12, a material that is easily electrostatically separated into positive and negative, that is, a material that is easily charged, and that is relatively lightweight is used. For example, fluorine resin, vinyl chloride, cellophane, celluloid, polyethylene, acrylic, polyester, polypropylene, polystyrene (styrol), wool that is easily charged positively, nylon (trademark), rayon, cotton, etc. are used. . In consideration of the weight and workability of the media 12, it is preferable to use polyethylene, acrylic, polyester, polypropylene, polystyrene, or the like. In a typical plastic triboelectric charge train, the amount of negative charges generated increases in the order of rayon, polyester, urethane, polyethylene, vinyl, and fluororesin.

  In the case where a plastic material is used as the medium 12, it is more preferable to use a foaming resin (for example, a polystyrene foam which is a polystyrene foaming resin) because the substance 16 is reduced in weight. Furthermore, the substance 16 is preferably opaque rather than colorless and transparent or colored in an appropriate color, for example, red or yellow, for easy visual recognition. In particular, it is more preferable that the color of the container 10 or the color of the eyeglass lens 22 is different from that of the container 10 in order to make the substance 16 visible more easily.

  The surface of the media 12 is coated with a conductive material 14 so that static electricity is not generated. As the conductive material 14, a surfactant as an antistatic material is mainly used. Specifically, alkylbenzene sulfonate, tetraalkylammonium salt, alkylbetaine and other ionic surfactants, or glycerin fatty acid ester, polyoxyethylene alkyl ether and other nonionic surfactants can be employed. Examples include materials such as Lion Elegard.

  The static electricity generating member 26 is used to generate static electricity by being pressed against the convex optical surface 24 on the spectacle lens 22 and rubbed, and a material that easily contacts the spectacle lens 22 is easily charged. Any material can be used as long as it is made of. For example, an ordinary eyeglass lens 22 made of nylon or polyester may be used as the static electricity generating member 26. In addition, it may be in a form in which cotton is put inside and bag-bound. Further, it may be one in which one surface of a cube is covered with a cloth that is easily charged, like a blackboard eraser.

  In a state where the spectacle lens 22 is attached to the opening 18 of the container 10, the distance D (see FIG. 2) from the center of the lower surface of the spectacle lens 22 to the uppermost substance 16 is the weight, material, and spectacle lens 22. Although it depends on the charge amount and the like, it is within a range of 5 to 30 mm, more preferably 10 to 15 mm. If the distance is 5 mm or less, the amount of the substance 16 attached may increase too much, which is not preferable. If it is 30 mm or more, it is not preferable because it is too far away and the adhesion amount of the substance 16 decreases.

  FIG. 3 is a cross-sectional view illustrating a state in which the spectacle lens according to the present embodiment has started to be charged, and FIG. 4 is a cross-sectional view illustrating a state in which the spectacle lens according to the present embodiment has been charged. First, the spectacle lens charging inspection jig 2 is prepared, and it is confirmed that the substance 16 is not attached to the lower surface of the spectacle lens 22. When the confirmation is finished, next, as shown in FIG. 3, the convex optical surface 24 of the spectacle lens 22 is pressed and rubbed by the static electricity generating member 26 a predetermined number of times (for example, 10 times).

  When the convex optical surface 24 of the spectacle lens 22 is pressed and rubbed by the static electricity generating member 26, static electricity is generated between the spectacle lens 22 and the static electricity generating member 26 due to the friction. In this case, if the spectacle lens 22 is not subjected to antistatic treatment on the surface of the spectacle lens 22 and has a very high surface resistance, the spectacle lens 22 is charged. The amount of charge varies depending on the contact area between the static electricity generating member 26 and the spectacle lens 22, the pressing force, the number of times of pressing and friction, and the number of times of pressing and friction increases as the contact area and the pressing force increase. In this case, the charge amount increases. When a cloth made of polyethylene or polyester is used as the static electricity generating member 26, a negative charge is generated on the surface of the static electricity generating member 26 that comes into contact with the spectacle lens 22, so that the spectacle lens 22 is charged with a negative charge. Therefore, a positive charge is attracted to the upper surface (on the spectacle lens 22 side) of the substance 16 installed below the spectacle lens 22 by electrostatic induction (electrical polarization), and it floats against gravity and is adsorbed on the spectacle lens 22 surface. At this time, the substance 16 itself is not charged, and is separated into a positive charge on the spectacle lens 22 side and a negative charge on the opposite side by electrostatic induction (electrical polarization). It is sex. Therefore, when the spectacle lens 22 is not charged, the electrostatic induction (electric polarization) of the substance 16 is also released, and the spectacle lens 22 is not attracted to the surface. FIG. 2 shows this state. The adhesion amount of the substance 16 is as large as the spectacle lens 22 that is easily charged.

  In order to inspect whether or not the spectacle lens 22 is charged, the spectacle lens 22 is viewed from above, and whether or not the substance 16 is attached to the spectacle lens 22 is viewed through the spectacle lens 22. Good. When the substance 16 is attached to the spectacle lens 22, the spectacle lens 22 is easily charged, and the spectacle lens 22 is easily stained and difficult to remove. On the other hand, when the substance 16 is not attached or when the amount of attachment is very small, the spectacle lens 22 is less likely to be charged, and the spectacle lens 22 is less likely to get dirty and easy to remove dirt even if dirty. As a result of the measurement, adhesion of the substance 16 was not confirmed in the spectacle lens 22 having a surface resistance of 5 × 10 9 Ω / □, and adhesion of the substance 16 was confirmed in the spectacle lens 22 of 1012 to 1013 Ω / □.

  DESCRIPTION OF SYMBOLS 2 ... Charging inspection jig for spectacle lenses 10 ... Container 12 ... Media (dielectric) 14 ... Conductive material 16 ... Substance 18 ... Opening 20 ... Concave side optical surface 22 ... Eyeglass lens 24 ... Convex side optical surface 26 ... Static electricity Generating member.

Claims (7)

A container having an upper opening ;
A number of substances formed by applying a conductive material to the surface of the dielectric, with a minute granular dielectric housed in the container,
Static electricity generation that generates static electricity on the spectacle lens by pressing and rubbing the other optical surface of the spectacle lens placed with one optical surface facing down so as to cover the upper opening of the container in the charge inspection of the spectacle lens Members,
A charge inspection jig for spectacle lenses, comprising: The electrification inspection jig for spectacle lenses according to claim 1,
The electrically conductive material is an antistatic agent. The electrification inspection jig for spectacle lenses according to claim 2,
The antistatic agent is a surfactant, a charging inspection jig for spectacle lenses, wherein: In the electrification inspection jig for spectacle lenses according to any one of claims 1 to 3,
A charging inspection jig for spectacle lenses, wherein the substance is opaque or colored. In the electrification inspection jig for spectacle lenses according to any one of claims 1 to 4,
The substance has a size of 1 to 5 mm and is formed in a spherical shape, an elliptical shape, an oval shape, or a cylindrical shape. In the eyeglass lens charging inspection jig according to any one of claims 1 to 5,
The container is made of a conductive material, and is a spectacle inspection charging jig for spectacle lenses. A spectacle lens is placed with one optical surface facing down in the upper opening of a container containing a large number of substances formed by applying a conductive material on the surface of the dielectric, with a fine granular dielectric inside. And a process of
Pressing and rubbing the other optical surface of the spectacle lens with a static electricity generating member to generate static electricity on the optical surface of the spectacle lens; and
A step of the substance in the container is visible it through spectacle mirror lens whether attached to the lower surface of the spectacle lens,
A method for inspecting electrification of spectacle lenses, comprising:

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