JP2009085744A - Charged state inspection tool for lens and charged state inspection method for lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charged state inspection tool for a lens which can conveniently and inexpensively inspect a charged state of the plastic lens. <P>SOLUTION: The charged state inspection tool 1 for the lens comprises: a vessel 3 upwardly opened, and formed from a conductive material; a plurality of materials 4 accommodated in the vessel 3, and formed from a micro particulate dielectric material; a coating member 6 having light-transmitting properties and flexibility, covering an opening of the vessel 3, and preventing the materials 4 from flying out of the vessel 3; and a static charge generating member 7. When the plastic lens 2 is inspected, the plastic lens 2 is placed on the coating member 6. A concave surface 2b of the lens 2 is pressed by the static charge generating member 7. An static charge is generated by a friction. The materials 4 within the vessel are attracted, float, and are stuck to a lower surface of the coating member 6. The charged state of the lens is inspected by viewing the materials 4 stuck to the coating member 6 through the lens 2 and the coating member 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a charged state inspection tool for a lens for inspecting a charged state of a plastic lens and a charged state inspection method for a lens.

  As a device for inspecting the charged state of a dielectric material (insulator) such as plastic, a surface resistance meter for measuring the electrical resistivity of the surface (for example, product name “High Lester UP” manufactured by Mitsubishi Chemical), a predetermined measurement distance, etc. A charged state measuring device that measures the electric potential between a glass plate and a conductor facing each other and measures the polarity and charge amount of the glass plate from the result and the measurement distance (see, for example, Patent Documents 1 and 2) It has been known.

  In addition, as a simple method for inspecting the charged state of the lens surface, for example, the lens surface is pressed with a polyester cloth and rubbed a predetermined number of times. There are known methods for inspecting the charged / uncharged state of a lens (see Patent Document 1) or inspecting the charged state using a powdered polystyrene foam.

JP 2000-162780 A JP 2001-141901 A

However, it is difficult to remove a dielectric made of cigarette ash, powdered polystyrene foam, etc. directly on the surface of the charged lens by the Coulomb force caused by charging, and if the dielectric is removed by hand or blown away, There was a problem that it was scattered around and adhered to other articles, etc. or dropped on the floor, and the recovery was troublesome.
In addition, even if it is measured with a surface resistance meter or a charged state measuring device to evaluate the charged state of the lens surface, how much chargeability is obtained from the measured value alone, in other words, how much amount There is a problem that it is difficult to determine whether the dielectric material adheres.

  The present invention has been made in order to solve the above-described conventional problems, and an object of the present invention is to inspect a charged state of a lens that can visually inspect a charged state of a lens by a relatively simple method. It is an object to provide a method for inspecting the charged state of a tool and a lens.

  In order to achieve the above object, a charged state inspection tool for a lens according to the present invention comprises a container that is open at the top, a large number of substances made of minute granular dielectrics housed in the container, and a translucent property. And a covering member which has flexibility and prevents the substance from jumping out of the container by covering the opening of the container, and a plastic placed on the covering member with one optical surface facing down And a static electricity generating member that presses and rubs the other optical surface of the lens to generate static electricity on both optical surfaces of the lens.

  Further, according to the present invention, in the above invention, the container that is opened upward is made of a conductive material.

  The present invention is the above invention, wherein the substance is opaque or colored.

  Moreover, the present invention is the above invention, wherein the substance has a size of 0.1 to 2 mm and is formed in a spherical shape, an elliptical shape, an oval shape, or a cylindrical shape.

  In the invention described above, the covering member is formed in a net shape in which the mesh is smaller than the substance.

  The present invention is the above invention, wherein the covering member is formed of a transparent thin plastic sheet.

  Moreover, this invention is stored in the said container in the said invention so that the distance from the lowermost back surface of the said covering member to the said substance may exist in the range of 5-30 mm.

  Furthermore, in the method for inspecting the charged state of a lens according to the present invention, a large number of substances made of minute granular dielectric materials are housed inside, and the upper opening is covered with a covering member having translucency and flexibility. Placing the plastic lens on the covering member of the container with one optical surface facing down, and pressing and rubbing the other optical surface of the plastic lens with a static electricity generating member to generate static electricity on both optical surfaces of the lens A step of generating each and a step of visually confirming whether or not the substance in the container has adhered to the lower surface of the covering member through the lens and the covering member.

  In the present invention, when the optical surface on the plastic lens is rubbed by the static electricity generating member, triboelectricity (static electricity) is generated and both optical surfaces are charged. The amount of charge varies depending on the contact area between the static electricity generating member and the lens, the pressing force, the number of times of pressing and friction, and the amount of charging increases as the contact area and pressing force increases and the number of times of pressing and friction increases. growing. When the lens is charged, the covering member is also charged, so that the substance made of a dielectric in the container is attracted by the lens and the covering member, floats, and adheres to the lower surface of the covering member. By visually observing the substance adhering to the lower surface of the covering member through the lens and the covering member, the charged state of the lens can be inspected. The covering member prevents material from popping out of the container and adhering to the lens.

  In the present invention, 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.

  In the present invention, since the substance is opaque or colored, the substance can be easily viewed through the lens and the covering member. 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.

  In the present invention, since the substances are formed in a spherical shape, an elliptical shape, an oval shape, or a cylindrical shape, the substances do not contact each other in a point or line shape and do not harden into a lumpy shape.

  In this invention, since the coating | coated member is formed in net shape, it can be visually recognized whether the substance has adhered through the mesh.

  In this invention, since the coating | coated member is formed with the transparent thin plastic sheet, it can be visually recognized whether the substance has adhered through the sheet | seat.

  In the present invention, since the substance is stored in the container so that the distance from the lowermost part of the back surface of the covering member to the substance is within the range of 5 to 30 mm, the substance can be attached to the covering member. When the thickness is 5 mm or less, the amount of adhesion increases, or when the lens is placed with the convex optical surface facing down, the covering member may follow the convex optical surface and may be deformed. Absent. If it is 30 mm or more, it is difficult to suck the substance even if the lens and the covering member are charged. A more preferable distance is 10 to 15 mm.

  In the present invention, “fine particles” refers to small pieces having a size of about 0.1 to 10 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. A scaly (lamellar) shape is also included in the “granular” shape herein.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
FIG. 1 is an exploded perspective view showing an embodiment of a charged state inspection tool for a lens according to the present invention, FIG. 2 is a cross-sectional view of the charged state inspection device for a lens, and FIG. 3 shows a state in which a plastic lens starts to be charged. FIG. 4 is a sectional view showing a state where charging is completed. In these drawings, a lens state-of-charge inspection tool 1 is used for inspecting whether a plastic lens (hereinafter referred to as a lens) 2 is charged, and is stored in the container 3 and the container 3. In addition, a large number of substances 4 made of a fine granular dielectric, a covering member 6 that covers the opening 5 of the container 3, and a static electricity generating member 7 that charges the lens 2 are provided.

  The lens 2 has a convex optical surface 2a and a concave optical surface 2b by being formed in a meniscus shape with a circular outer diameter of, for example, 75 mm. As the lens substrate of the lens 2, methacrylate resin, polyurethane resin, polycarbonate resin, acrylate resin, polyester resin, or the like is used.

  The container 3 is formed in a bottomed cylindrical shape whose upper side is opened by a conductive material such as SUS or aluminum, and has an outer diameter smaller than the outer diameter of the lens 2 (for example, 1/2 to 95/100 of the lens outer diameter). have.

  As the substance 4 made of the granular dielectric material, a material that is easily separated into positive and negative electrons, that is, a material that is easily charged, and that is relatively light is used. For example, fluorine resin, vinyl chloride, cellophane, celluloid, polyethylene, acrylic, polyester, polypropylene, polystyrene (styrol), wool that easily charges positive electricity, nylon (trademark), rayon, cotton, etc. Used. Considering the weight and processability of the substance 4, it is preferable to use polyethylene, acrylic, polyester, polypropylene, polystyrene, or the like. In a typical plastic triboelectric charge train, the amount of negative electricity generated increases in the order of rayon, polyester, urethane, polyethylene, vinyl, and fluororesin.

  Moreover, when using a plastic material as the substance 4, it is more preferable to use a foamed resin (for example, polystyrene foam which is a polystyrene foamed resin) because the substance 4 is reduced in weight. Furthermore, the substance 4 is preferably opaque rather than colorless and transparent or colored in an appropriate color, such as red or yellow, for easy visual recognition. In particular, it is more preferable that the color of the container 3 and the color of the covering member 6 are colored in order to make the substance 4 more easily visible.

  The shape of the substance 4 is preferably a round shape with few planes, for example, a spherical shape, an elliptical shape, an oval shape, or a cylindrical shape. With such a rounded shape, the substances 4 come in contact with each other in a dot or line shape, and therefore it is possible to prevent the material 4 from being hardened into a large lumpy shape.

  The size of the substance 4 is preferably in the range of 0.1 to 2 mm. If it is 0.1 mm or less, it is too small and it is difficult to remove it after adhering to the covering member 6. If it is 2 mm or more, it becomes unhealthy because it becomes heavy and hardly adheres to the covering member 6. When the substance 4 has an elliptical shape, an oval shape, or a cylindrical shape, it may have a minor axis of about 0.1 mm and a major axis of about 2 mm.

  The covering member 6 covers the opening 5 that opens above the container 3 and is used to prevent the substance 4 from jumping out of the container 3 and adhering to the lens 2. Is formed in a circular shape larger than the outer diameter of the container 3 by an insulating material having a softness that does not damage the lens 2, and the outer peripheral edge is bent along the upper end of the outer peripheral surface of the container 3. It is fixed. When the covering member 6 is attached to the opening 5, it is preferable that the covering member 6 is attached in a bent state so as to substantially match the shape of the convex surface 2 a of the lens 2 as shown in FIG. If the lens 2 is mounted in such a bent state, when the lens 2 is placed on the covering member 6 with the convex optical surface 2a facing down, the covering member 6 is brought close to or in close contact with the convex surface 2a. be able to.

  As the covering member 6, a net knitted with a thin thread made of the same material as the substance 4 or a transparent thin plastic sheet is used. In the present embodiment, an example in which a net formed of a fiber such as polyester is used is shown. The net mesh has a size smaller than the particle size of the substance 4.

  When the covering member 6 is formed in a net shape, when the lens 2 is placed with the convex optical surface 2a facing down, if the convex optical surface 2a presses and extends the covering member 6, the mesh becomes Since the substance 4 may become large and jump out, it is desirable to attach the covering member 6 to the opening 5 of the container 3 so as to be in light contact or non-contact. On the other hand, in the case of a plastic sheet, there is no problem even if the convex optical surface 2a presses the covering member 6 to slightly extend because it does not have a minute hole.

  In a state where the covering member 6 is attached to the opening 5 of the container 3, the distance D (FIG. 2) from the center of the lower surface of the covering member 6 to the uppermost substance 4 is the weight, material, and charge amount of the lens 2. Depending on the above, it is 5 to 30 mm, and more preferably 10 to 15 mm. It is not preferable that the distance D is 5 mm or less because the adhesion amount of the substance 4 increases too much or the covering member 6 may come into contact with the substance 4 when the lens 2 is placed. If it is 30 mm or more, it is not preferable because it is too far away and the adhesion amount of the substance 4 decreases.

  The static electricity generating member 7 is used to generate static electricity by being pressed against the optical surface 2b on the lens 2 and rubbing it. Anything may be used. For example, general eyeglass lens wiping made of nylon or polyester may be used as the static electricity generating member 7. 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.

Next, the charged state inspection procedure by the lens charged state inspection tool 1 having the above structure will be described.
First, the charged state inspection tool 1 for lenses is prepared, and it is confirmed that the substance 4 is not attached to the lower surface of the covering member 6. When the confirmation is completed, the lens 2 is then placed on the covering member 6 with the convex surface 2a facing down, and the convex surface 2a is lightly brought into contact with or in close proximity to the covering member 6. In this state, the concave surface 2b of the lens 2 is pressed and rubbed by the static electricity generating member 7 a predetermined number of times (for example, 10 times) (FIG. 3).

  When the concave surface 2b of the lens 2 is pressed and rubbed by the static electricity generating member 7, static electricity is generated in the lens 2 and the static electricity generating member 7 due to the friction. In this case, if the lens 2 is not subjected to antistatic treatment on the lens surface and has a very high surface resistance, the convex surface 2a and the concave surface 2b are charged. This amount of charge varies depending on the contact area between the static electricity generating member 7 and the lens 2, the pressing force, the number of times of pressing and friction, and if the contact area and the pressing force are increased, the number of times of pressing and friction is increased. In addition, the charge amount increases. Further, when a cloth made of polyethylene or polyester is used as the static electricity generating member 7, negative electricity is generated on the surface of the static electricity generating member 7 that comes into contact with the lens 2, so that the concave surface 2b of the lens 2 is charged with positive electricity. Negative electricity is charged on the convex surface 2a.

  When the optical surfaces 2a and 2b of the lens 2 are charged, the covering member 6 is also charged accordingly. When the convex surface 2a of the lens 2 is negatively charged, the covering member 6 is positively charged on the front surface and positively charged on the back surface. In the substance 4 in the container 3, electrons are electrostatically separated into positive and negative by the charging of the lens 2 and the covering member 6, negative electricity is charged on the upper surface facing the covering member 6, and the lower surface. Positive electricity is charged. For this reason, the substance 4 is attracted by the lens 2 and the covering member 6 and floats, and adheres to the lower surface of the covering member 6. FIG. 4 shows this state. The adhesion amount of the substance 4 is larger as the lens is easily charged.

In order to inspect whether the lens 2 is charged, the lens 2 is visually recognized from above, and whether the substance 4 is attached to the covering member 6 is visually confirmed through the lens 2 and the covering member 6. Good. When the substance 4 adheres to the covering member 6, the lens is easily charged, easily contaminated, and difficult to remove. On the other hand, when the substance 4 is not attached or the amount of attachment is very small, the lens is difficult to be charged, and it is difficult to get dirt, and even if it is dirty, it is easy to take dirt. As a result of the measurement, the adhesion of the substance 4 was not confirmed in the lens having a surface resistance of 5 × 10 ⁹ Ω / □, and the adhesion of the substance 4 was confirmed in the lens of 10 ¹² to ¹³ Ω / □.

  As described above, according to the charged state inspection tool 1 for a lens according to the present invention, the lens 2 is placed on the covering member 6 and the lens 2 is pressed by the static electricity generating member 7 and rubbed as many times as necessary. Since it is only necessary to visually check whether the lens 6 is attached or not, it is possible to easily and reliably inspect whether or not the lens 2 is an easily charged lens, and the substance 4 may adhere to the lens 2. There is no possibility that the substance 4 in the container 3 may jump out of the container 3 even if the inspection is completed and the lens 2 is removed from the charged state inspection tool 1 for the lens. It is not necessary and the surrounding environment can be kept clean. In addition, after the inspection is finished, the charged state of the covering member 6 gradually weakens, and after a certain period of time, the adhered substance 4 falls due to falling by its own weight or by applying vibration to the covering member 6. The next lens can be inspected.

  In addition, the charged state inspection tool for lenses 1 is simple in structure and can be manufactured at low cost, and is extremely easy and easy to handle. Or, it can be used for a charging test by a third person such as a spectacle wearer.

  Furthermore, since the container 3 is formed of a conductive material, the substance 4 is not excessively charged or attached to the container.

  In the above-described embodiment, the case where the lens 2 is placed on the covering member 6 with the convex optical surface 2a facing down has been described. However, the lens 2 may be placed with the concave optical surface 2b facing down. . In this case, the distance between the concave optical surface 2b and the covering member 6 is increased depending on the curve of the concave optical surface 2b, and therefore, the static electricity generating member 7 is compared with the case where the convex optical surface 2a is placed downward. It is desirable to increase the amount of static electricity generated by increasing the number of times of friction by pressing.

  In the above-described embodiment, the container 3 is made of a conductive material, but is not limited thereto, and a glass container (petri dish) may be used.

It is a disassembled perspective view which shows one Embodiment of the charged condition inspection tool for lenses which concerns on this invention. It is sectional drawing of the charged condition inspection tool for lenses. It is sectional drawing which shows the state which started charging the plastic lens. It is sectional drawing which shows the state which has fully charged.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lens charged state inspection tool, 2 ... Plastic lens, 3 ... Container, 4 ... Substance, 5 ... Opening part, 6 ... Cover member, 7 ... Static electricity generating member.

Claims (8)

  A container that is open at the top, a large number of substances composed of minute granular dielectrics housed in the container, and a container of the substance that has translucency and flexibility and covers the opening of the container A covering member that prevents the outside from jumping out, and the other optical surface of the plastic lens placed on the covering member with one optical surface facing down is pressed and rubbed, and static electricity is applied to both optical surfaces of the lens. A charged state inspection tool for a lens, comprising: a static electricity generating member to be generated. The charged state inspection tool for lenses according to claim 1,
The container is made of a conductive material, and the charged state inspection tool for lenses. The charged state inspection tool for lenses according to claim 1 or 2,
The charged state inspection tool for lenses, wherein the substance is opaque or colored. The charged state inspection tool for lenses according to any one of claims 1 to 3,
The charged state inspection tool for a lens, wherein the substance has a size of 0.1 to 2 mm and is formed in a spherical shape, an elliptical shape, an oval shape, or a cylindrical shape. The charged state inspection tool for lenses according to any one of claims 1 to 4,
The charged state inspection tool for lenses, wherein the covering member is made of an insulating material in a net shape smaller than the substance. The charged state inspection tool for lenses according to any one of claims 1 to 4,
The charged state inspection tool for lenses, wherein the covering member is formed of a transparent thin plastic sheet. In the charged state inspection tool for lenses according to any one of claims 1 to 6,
The charged state inspection tool for lenses, wherein the substance is stored in the container so that a distance from the lowermost part of the back surface of the covering member to the substance is within a range of 5 to 30 mm. A plastic lens is placed on one of the optical surfaces on the covering member of the container in which a large number of fine particles of dielectric material are housed and the upper opening is covered with a covering member having translucency and flexibility. A step of placing the material downward,
The other optical surface of the plastic lens is pressed and rubbed by a static electricity generating member to generate static electricity on both optical surfaces of the lens, and
Visually recognizing whether the substance in the container has adhered to the lower surface of the covering member through the lens and the covering member;
A charged state inspection method for a lens, comprising:

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