JP2012098515A - Glasses for appreciating stereoscopic image and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide stereoscopic image appreciating glasses capable of reducing materials to use to suppress manufacturing cost and a method for rationally manufacturing the glasses.SOLUTION: A pair of right and left lenses are mounted on a front frame, and each lens has a polarizing plate 1 that enables visual recognition corresponding to image light for the right eye or the left eye respectively. On one side of the polarizing plate 1 is formed a thermoplastic resin lens layer 2 by injection molding and on the other side is formed a phase difference plate 3, forming an integrated lamination layer with those components. On the other hand, the polarizing plate 1 is formed into a predefined curved surface by employing technical means for forming triacetyl cellulose films 12 and 12 on both sides of a polarizing film 11 in such a manner that the thermoplastic resin layer 2 corresponding to the eyepiece side is on the concave side and the phase difference plate 3 corresponding to the objective side is on the convex side.

Description

  The present invention relates to improvement of eyeglasses used for viewing stereoscopic images, and more particularly, to glasses for viewing stereoscopic images that can reduce the manufacturing cost by reducing the materials used, and a method for manufacturing the same.

  As a visual technology in recent years, two different images are superimposed on each other as a right-eye image and a left-eye image, and this composite image is used for viewing glasses equipped with different polarizing lenses on the left and right sides (for example, patent literature). An image device that has become three-dimensional (3D: three-dimensions) and can be viewed as a three-dimensional image has become widespread by wearing it (see 1) and viewing with both eyes.

  The right-eye and left-eye images in such a stereoscopic image have a circular polarization structure in which a linearly polarizing plate and a phase difference plate (for example, a quarter-wave plate) are optically overlapped. Corresponds to the direction of rotation of the incident light.

  Conventionally, a phase difference plate for making circularly polarized light necessary for forming a stereoscopic image has been attached to the surface on the monitor side or the projection device side.

  Therefore, there is a problem that this retardation plate needs to cover the entire monitor screen, which increases the manufacturing cost.

  On the other hand, the lens mounted on the spectacles for viewing comprises a polarizing lens by integrally mounting a film-shaped polarizing plate on a plastic lens body, and this polarizing lens is formed by inserting the polarizing plate into an insert mold. It is produced by injecting molten lens molding resin that is placed inside.

  As such a polarizing plate, for example, a polarizing plate prepared by sandwiching a polarizing sheet between a pair of films made of triacetyl cellulose (hereinafter sometimes referred to as “TAC”) is also known.

  However, since the circularly polarizing plate has a polarization axis, it has been necessary to position the lens so that the polarization axis does not shift during lens molding.

Registered Utility Model No. 3159962 (page 3-4, Fig. 1-3)

  The present invention has been made in view of the above-described problems in conventional stereoscopic image viewing glasses, and the object of the present invention is to reduce the material used and reduce the manufacturing cost. It is an object of the present invention to provide a stereoscopic image viewing spectacle that can be manufactured and a manufacturing method that can rationally manufacture the spectacle.

  Means employed by the present inventor for solving the above-described problems will be described with reference to the accompanying drawings.

That is, in the present invention, a composite image obtained by superimposing a pair of light beams having circular polarization axes rotating in opposite directions as the right-eye image light and the left-eye image light is projected by the projection device, and the composite image is displayed. A pair of spectacle glasses for stereoscopic viewing,
Each lens held in a pair of left and right on the front frame has a visible polarizing plate 1 corresponding to the right-eye image light and the left-eye image light, and is formed on one surface of the polarizing plate 1. The lens layer 2 made of thermoplastic resin by injection molding is integrally disposed, and the phase difference plate 3 is disposed on the other surface, and these members are laminated and integrated,
The polarizing plate 1 is configured by disposing triacetyl cellulose films 12 and 12 on both surfaces of a polarizing film 11, respectively.
Adopting technical means that the thermoplastic resin lens layer 2 corresponding to the eyepiece side is formed on the concave surface side and the retardation plate 3 corresponding to the objective side is formed on the convex surface side so as to form a curved surface with a predetermined curve. As a result, glasses for viewing stereoscopic images were completed.

  Further, in order to solve the above-described problems, the present invention provides the polarizing plate 1 and the thermoplastic resin lens layer 2, and the polarizing plate 1 and the retardation plate 3 in addition to the above means as necessary. A technical means was employed in which the members were laminated and integrated with an adhesive interposed between them.

  Furthermore, in order to solve the above-described problems, the present invention adds the thermoplastic resin lens layer 2 and the same resin to the concave surface side of the polarizing plate 1 by applying or applying a sheet material to the concave surface side of the polarizing plate 1 as necessary. The technical means of arranging and integrating the sheet material and the thermoplastic resin lens layer 2 together by stacking and injection molding the molten thermoplastic resin was adopted.

  Furthermore, in order to solve the above-mentioned problems, the present invention employs technical means for making the lens layer 2 itself made of a thermoplastic resin into a prescription lens for visual correction in addition to the above-described means as necessary.

  Furthermore, in order to solve the above-mentioned problems, the present invention is technically that, in addition to the above-described means, the material of the thermoplastic resin lens layer 2 is made of a highly transparent material such as polycarbonate, acrylic or nylon. Adopted means.

  Furthermore, the present invention provides a technical means for providing the surface protective layer 5 on the surface of the thermoplastic resin lens layer 2 and the phase difference plate 3 in addition to the above means as necessary in order to solve the above-mentioned problems. It was adopted.

In the present invention, a composite image obtained by superimposing a pair of light beams having circular polarization axes rotating in opposite directions as right-eye image light and left-eye image light is projected by a projection device, and the composite image is displayed. A method for manufacturing spectacles for viewing for stereoscopic viewing,
In correspondence with the image light for the right eye and the image light for the left eye, the polarizing plate 1 that can be visually recognized is prepared by disposing the triacetyl cellulose films 12 and 12 on both surfaces of the polarizing film 11, respectively. While the phase difference plate 3 is laminated and integrated on the surface of one triacetyl cellulose film 12,
The laminate is bent into a predetermined curve so that the polarizing plate 1 corresponding to the eyepiece side is on the concave side and the retardation plate 3 corresponding to the objective side is on the convex side, and is installed in the insert mold. ,
The cavity created on the polarizing plate 1 side is filled with a molten thermoplastic resin,
Thereafter, the molten thermoplastic resin is cooled and cured to form the lens layer 2 and bonded and integrated with the polarizing plate 1.
In this way, a pair of lenses having the phase difference plate 3 rotating in the opposite direction is manufactured, and the technical means of holding the respective lenses on the left and right eyes of the front frame is adopted. Completed.

  Further, in order to solve the above-described problems, the present invention provides the polarizing plate 1 and the thermoplastic resin lens layer 2, and the polarizing plate 1 and the retardation plate 3 in addition to the above means as necessary. The technical means of laminating and integrating the adhesives between the members was adopted.

  Furthermore, in order to solve the above-described problems, the present invention adds the thermoplastic resin lens layer 2 and the same resin to the concave surface side of the polarizing plate 1 by applying or applying a sheet material to the concave surface side of the polarizing plate 1 as necessary. A technical means was adopted in which the thermoplastic resin lens layer 2 in a molten state was integrally bonded and laminated and integrated by injecting the thermoplastic resin.

In the present invention, each lens held in a pair of right and left on the front frame has a polarizing plate that can be visually recognized corresponding to the image light for the right eye and the image light for the left eye, and this polarizing plate. A thermoplastic resin lens layer formed by injection molding is integrally disposed on one surface of the liquid crystal, and a phase difference plate is disposed on the other surface. The plate is configured by arranging a film made of triacetyl cellulose on both sides of the polarizing film,
The thermoplastic resin lens layer corresponding to the eyepiece side is formed on the concave surface, and the retardation plate corresponding to the objective side is formed on the convex surface so that the material used is reduced. Therefore, it can be said that the practical utility value is extremely high since the manufacturing cost can be suppressed.

It is a whole perspective view showing the glasses for stereoscopic image appreciation of the embodiment of the present invention. It is explanatory sectional drawing showing the structure of the lens of embodiment of this invention. It is an explanation expanded sectional view showing details of a structure of a lens of an embodiment of the present invention. It is a perspective view showing the manufacturing process of the lens of embodiment of this invention. It is a perspective view showing the manufacturing process of the lens of embodiment of this invention. It is sectional drawing showing the manufacturing process of the lens of embodiment of this invention.

  The mode for carrying out the present invention will be described in more detail with reference to the drawings specifically illustrated as follows.

  An embodiment of the present invention will be described with reference to FIGS. In the figure, the reference numeral 1 indicates a polarizing plate, the reference numeral 2 indicates a thermoplastic resin lens layer, and the reference numeral 3 indicates a retardation plate. Further, what is indicated by reference numeral 4 is an adhesive layer, and what is indicated by reference numeral 5 is a surface protective layer.

  Thus, in the present embodiment, a composite image obtained by superimposing a pair of light beams composed of circular polarization axes rotating in opposite directions as image light for the right eye and image light for the left eye is projected by the projection device. An eyeglass for viewing worn for stereoscopic viewing of an image, the configuration is as follows.

  First, each of the lenses held in a pair of left and right glasses has a polarizing plate 1 that can be visually recognized corresponding to the image light for the right eye and the image light for the left eye.

  Further, a thermoplastic resin lens layer 2 formed by injection molding is integrally disposed on one surface of the polarizing plate 1, and a phase difference plate 3 is disposed on the other surface. Are laminated and integrated.

  The polarizing plate 1 is configured by arranging films 12 and 12 made of triacetyl cellulose on both surfaces of a polarizing film 11, respectively.

  As this polarizing film 11, a uniaxially stretched sheet of a resin sheet such as polyvinyl alcohol (PVA), polyvinyl acetal, polyvinyl butyral, etc., having a substantially uniform thickness of 0.1 mm or less, or those subjected to stabilization treatment such as a formalized product thereof. The degree of polarization is preferably 80% or more. At this time, in order to obtain a high degree of polarization, the uniaxially stretched sheet can be doped with iodine or a dichroic dye.

  The triacetyl cellulose (TAC) film 12 disposed on the surface of the polarizing film 11 is a film-like member formed by extrusion molding or solvent method casting. Triacetyl cellulose, which is a material used for the film 12, has a low photoelastic coefficient and a small optical anisotropy.

  Next, the thermoplastic resin lens layer 2 will be described. In the present embodiment, the thermoplastic resin used for the thermoplastic resin lens layer 2 is not only polycarbonate but also a material with as little optical anisotropy as acrylic and nylon, which is highly transparent and colorless. Those having high impact resistance and high heat resistance can be employed.

  In particular, as the polycarbonate material, for example, polybisphenol A carbonate can be employed, but in addition, 1,1′-dihydroxydiphenyl-phenylmethylmethane, 1,1′-dihydroxydiphenyl-diphenylmethane, 1,1 ′ -Dihydroxy-3,3'-dimethyldiphenyl-2,2-propane homopolymerized polycarbonate, a copolymer polycarbonate of each other, and a copolymerized polycarbonate with bisphenol A can also be employed.

  Next, as the retardation plate 3 in the present embodiment, for example, a quarter wavelength plate made of cycloolefin polymer (COP) can be adopted, and the thickness is 0.05 mm, the assumed wavelength is 550 nm, and the retardation is 140 ± 10 nm. Those having an optical axis angle of 90 ± 2 deg can be used.

  The entire lens has a predetermined curve with respect to the polarizing plate 1 such that the thermoplastic resin lens layer 2 corresponding to the eyepiece side is on the concave surface side and the phase difference plate 3 corresponding to the objective side is on the convex surface side. It is formed in a curved surface shape (see FIG. 2).

  In the present embodiment, the thermoplastic resin lens layer 2 itself may be a lens with a degree for visual correction.

<About manufacturing method>
Next, a method for manufacturing viewing glasses according to the present invention will be described below.

  First, in correspondence with the image light for the right eye and the image light for the left eye, the polarizing plate 1 that can be visually recognized is disposed, and the triacetyl cellulose films 12 and 12 are disposed on both surfaces of the polarizing film 11, respectively.

  In the present embodiment, the polarizing plate 1 and the thermoplastic resin lens layer 2 and the polarizing plate 1 and the retardation plate 3 are laminated and integrated with an adhesive (or an adhesive) between these members. (See FIG. 3).

  As this adhesive, isocyanate type, polyurethane type, polythiourethane type, epoxy type, vinyl acetate type, acrylic type, wax type can be adopted, and as the adhesive, vinyl acetate type, acrylic type can be used. System type can be adopted.

  These adhesives or pressure-sensitive adhesives can be applied by a known gravure coating method, offset coating method or the like. At this time, the thickness of the adhesive layer (or pressure-sensitive adhesive layer) is about 0.1 to 100 μm.

  At this time, in order to improve the bonding force of the adhesive layer or the pressure-sensitive adhesive layer, the surface of each film may be subjected to chemical chemical treatment with acid, alkali, etc., ultraviolet treatment, plasma discharge or corona discharge treatment. it can.

  Next, the phase difference plate 3 is laminated and integrated on the surface of one of the triacetyl cellulose films 12.

  In the present embodiment, the laminated body of the polarizing plate 1 and the retardation plate 3 is die-molded from the sheet master into substantially the same shape (strip shape) as the sink hole provided in the mold (FIG. 4). reference). By molding in this way, the linear edge portion e can be positioned so as to match the peripheral shape of the concave sink hole formed in the lens molding die, and the polarization axis of the retardation plate 3 can be positioned. Misalignment can be prevented.

  Then, the laminate is bent into a predetermined curve so that the polarizing plate 1 corresponding to the eyepiece side is on the concave side and the retardation plate 3 corresponding to the objective side is on the convex side (spherical heat press molding). ) And installed in the insert mold (see FIGS. 5 and 6).

  Next, a molten thermoplastic resin (polycarbonate in this embodiment) is filled in the cavity created on the polarizing plate 1 side.

  Thereafter, the molten thermoplastic resin is cooled and cured to form the lens layer 2 and bonded and integrated with the polarizing plate 1.

  In this way, a pair of lenses having the phase difference plate 3 rotating in the opposite direction is manufactured, and held on the left and right eyes of the front frame to complete the stereoscopic image viewing glasses.

  Further, in the present embodiment, the thermoplastic resin lens layer 2 and the same resin as the sheet material are attached or applied to the concave surface side of the polarizing plate 1 to inject the thermoplastic resin. Thus, the thermoplastic lens layer 2 in a molten state can be integrally bonded and laminated and integrated. By doing so, the adhesive layer 4 can be omitted.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the claims, for example, a spectacle lens. The lens shape and the curve of the front frame can also be arbitrarily designed and belong to the technical scope of the present invention.

1 Polarizing plate
11 Polarizing film
12 Triacetylcellulose film
13 Adhesive layer 2 Thermoplastic resin lens layer 3 Retardation plate 4 Adhesive layer 5 Surface protective layer M Insert mold e Edge

Claims (9)

A composite image composed of a pair of light beams consisting of circularly polarized axes rotating in opposite directions as the image light for the right eye and the image light for the left eye is projected by the projection device and mounted for stereoscopic viewing of this composite image Eyeglasses for viewing,
Each lens held in a pair of left and right on the front frame has a polarizing plate (1) that can be visually recognized corresponding to the image light for the right eye and the image light for the left eye, and this polarizing plate (1) A lens layer (2) made of thermoplastic resin by injection molding is integrally disposed on one surface of the lens, and a phase difference plate (3) is disposed on the other surface, and these members are laminated. While being integrated,
The polarizing plate (1) is composed of triacetyl cellulose films (12, 12) disposed on both sides of a polarizing film (11),
The thermoplastic resin lens layer (2) corresponding to the eyepiece side is formed in a curved surface with a predetermined curve so that the phase difference plate (3) corresponding to the objective side is on the concave surface side. Spectacles for viewing 3D images.   In the polarizing plate (1) and the thermoplastic resin lens layer (2), and the polarizing plate (1) and the retardation film (3), an adhesive is interposed between these members, and the layers are integrated. The stereoscopic image viewing glasses according to claim 1, wherein the stereoscopic image viewing glasses are provided.   On the concave surface side of the polarizing plate (1), the thermoplastic resin lens layer (2) is disposed by adhering or coating the same resin sheet material, and the molten thermoplastic resin is injection-molded, whereby the sheet The stereoscopic image viewing spectacles according to claim 1, wherein the material and the thermoplastic resin lens layer (2) are integrally bonded and laminated together.   The glasses for stereoscopic image viewing according to any one of claims 1 to 3, wherein the lens layer (2) itself made of a thermoplastic resin is a prescription lens for visual correction.   The material for the thermoplastic resin lens layer (2) is a highly transparent material such as polycarbonate, acrylic, or nylon, and the stereoscopic image viewing glasses according to any one of claims 1 to 4.   The three-dimensional object according to any one of claims 1 to 5, wherein a surface protective layer (5) is provided on the surface of the thermoplastic resin lens layer (2) and the phase difference plate (3). Glasses for viewing images. A composite image composed of a pair of light beams consisting of circularly polarized axes rotating in opposite directions as the image light for the right eye and the image light for the left eye is projected by the projection device and mounted for stereoscopic viewing of this composite image A method of manufacturing spectacles for viewing,
Corresponding to the image light for the right eye and the image light for the left eye, a polarizing plate (1) that can be visually recognized, and a triacetyl cellulose film (12, 12) are arranged on both sides of the polarizing film (11), respectively. While producing and laminating and integrating the retardation plate (3) on the surface of one triacetyl cellulose film (12),
The laminate is bent to a predetermined curve so that the polarizing plate (1) corresponding to the eyepiece side is on the concave surface side and the retardation plate (3) corresponding to the objective side is on the convex surface side. Installed in the
Fill the cavity created on the polarizing plate (1) side with a molten thermoplastic resin,
After that, the molten thermoplastic resin is cooled and cured to form a lens layer (2), and bonded and integrated with the polarizing plate (1),
In this way, a pair of lenses having the phase difference plate (3) rotating in the opposite direction is manufactured and held on each of the left and right eyes of the front frame.   In the polarizing plate (1) and the thermoplastic resin lens layer (2), and the polarizing plate (1) and the retardation plate (3), an adhesive is interposed between these members, and they are laminated and integrated. The method for manufacturing stereoscopic image viewing glasses according to claim 7.   On the concave surface side of the polarizing plate (1), the thermoplastic resin lens layer (2) is disposed by attaching or coating the same resin sheet material, and the thermoplastic resin in a molten state is injected by injecting the thermoplastic resin. The method for manufacturing glasses for viewing stereoscopic images according to claim 7, characterized in that the lens-making lens layer (2) is integrally bonded and laminated and integrated.

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