Stock material or miscellaneous articles – Composite
Reexamination Certificate
2001-09-05
2003-09-02
Boykin, Terressa M. (Department: 1711)
Stock material or miscellaneous articles
Composite
C264S176100, C351S163000, C359S494010, C528S196000, C528S198000, C528S271000, C528S272000, C428S412000
Reexamination Certificate
active
06613433
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a technique of providing an optical composite having a large impact strength incorporated with a polarizer, such as a lens base material, which is used as goggles, sunglasses, prescription sunglasses, etc., each having impact strength.
Goggles and spectacles, which are used in sport fields such as skiing, snow boarding, ice skating, yachting, boating, bicycling, motorcycling, etc., and industrial fields such as general manufacturing industries, building and civil engineering, etc., are used for the purpose of preventing from dazzling by direct rays and deflected rays and also protecting eyes from winds, snows, rains, sea water, water, sands, chemicals, foreign matters, etc. Also, sunglasses for general use and prescription sunglasses are used for the purpose of preventing dazzling light and reflected light.
Hitherto, there are a polarizing glass lens formed by covering both surfaces of a polarizer sheet with a glass and a polarizing plastic lens formed by inserting a polarizing sheet in a mold and cast molding them, such as a polarizing CR-39 lens.
Also, an optical composite molded material, which is obtained by inserting a polarizing plate of a laminated layer structure formed by holding a polarizer sheet between two polycarbonate sheets in a mold, and further insert injection molding them such that a polycarbonate resin layer is heat-adhered to the polycarbonate sheets, is known (Japanese Patent Laid-Open No. 52817/1996).
In each case, a glass, CR-39, or a polycarbonate sheet is used as a protective sheet for a polarizer sheet, that is, a material of one kind only is used as a protective sheet.
In the above-described polarizing glass lens sheet formed by covering both surfaces of a polarizer sheet with glass, there are problems that the sheet is liable to be broken because of using a glass base material, and the workability is insufficient caused by that the base material is hardly subjected to thermoforming.
Also, in the polarizing plastic lens formed by inserting a polarizer sheet in a mold and cast molding, because a high technique is required for incorporating the polarizer sheet in the mold, and the polarizer sheet is shrunk and thermally decomposed by a heat received for long time during cast molding, there is a problem that the polarizing performance is lowered.
Furthermore, in the optical composite molded material obtained by an insert injection molding method so that the polycarbonate resin layer is heat-adhered to the polycarbonate sheet of the outermost layer of the polarizing plate as shown in Japanese Patent Laid-Open No. 52817/1996, because the polarizing plate is too near the resin layer, and thus the heat at molding is conducted straight to the polarizing plate, as in the case of cast molding, the polarizer sheet causes shrinkage and thermal decomposition, whereby there is a problem that the polarizing performance is lowered.
SUMMARY OF THE INVENTION
The technical means of the invention for solving the above-described technical problems is in the viewpoint of a polarizing optical composite equipped with a polarizing plate holding a polarizer sheet layer between two protective sheet layers, wherein
the polarizer sheet layer has on one side thereof at least two layers, in a body, constructed of different materials each other.
Other technical means of the invention is in the viewpoint of a polarizing optical composite equipped with a polarizing plate holding a polarizer sheet layer between two protective sheet layers, wherein
the polarizer sheet layer has, in a body, on the outside of one of the layer in contact with one side of the polarizer sheet and the layer in contact with other side of the polarizer sheet, a layer constructed of a different material or a material having a different composition from the layer in contact with the polarizer sheet.
Still other technical means of the invention is in the viewpoint of a polarizing optical composite equipped with a polarizing plate holding a polarizer sheet layer between two protective sheet layers, wherein
the polarizing plate is laminated on both sides thereof with a layer constructed of a material different from the protective sheet layer via an adhesive, and the laminated layer is laminated, in a body, with a layer constructed of a different material or a material having a different composition from the protective layer in contact with the polarizer sheet layer.
Other technical means of the invention is in the viewpoint that laminated layers constructed of different materials each other or materials having different compositions each other are laminated on both sides of a polarizer sheet layer via an adhesive, and further a layer constructed of a different material or a material having a different composition from each of the laminated layers is laminated, in a body, on one of the laminated layers.
Still other technical means of the invention is in the viewpoint of a polarizing optical composite equipped with a polarizing plate holding a polarizer sheet layer between two protective sheet layers, wherein
a layer constructed of a material different from the protective sheet layers is laminated, in a body, on both sides of the polarizing plate via an adhesive.
Other technical means of the invention is in the viewpoint of a polarizing lens equipped with a polarizing plate holding a polarizer sheet layer between two protective sheet layers, wherein
the polarizer sheet layer has on one side thereof at least two layers, in a body, constructed of different materials each other.
Still other technical means of the invention is in the viewpoint of a polarizing lens equipped with a polarizing plate holding a polarizer sheet layer between two protective sheet layers, wherein
layers laminated in a body are formed on the concave side of the protective sheet in contact with the polarizer sheet layer at the concave side of the polarizing lens, and the laminated layers are constructed of a different material or a different composition from the protective sheet layer in contact with the polarizer sheet layer at the convex side of the polarizing lens.
Other technical means of the invention is in the viewpoint that laminated layers constructed of different materials or materials of different compositions from each other are laminated on both sides of a polarizer sheet layer via an adhesive, and further, a layer constructed of a different material or a material of a different composition from each of the laminated layers is laminated, in a body, on one side of the laminated layers.
Still other technical means of the invention is in the viewpoint that each of both sides of the polarizer sheet layer is equipped with a polarizing plate formed by laminating protective sheets constructed of a triacetate, a film is stuck to one side of the polarizing plate, and by injection molding the same material as the film by an in-mold treatment, the film is integrated with the polarizing plate.
Other technical means of the invention is in the viewpoint of being equipped with a polarizing plate formed by laminating a protective sheet layer constructed of a triacetate on one side of a polarizer sheet layer, and also laminating a protective sheet layer constructed of a different material or a triacetate of a different composition from the triacetate on the other side of the polarizer sheet layer, a film is stuck to one side of the polarizing plate, and by injection molding the same material as the film by an in-mold treatment, the film is integrated with the polarizing plate.
Still other technical means of the invention is in the viewpoint of a polarizing lens equipped with a polarizing plate holding a polarizer sheet layer between two protective sheet layers, wherein
the protective sheet layers of the polarizing plate are each constructed of a polycarbonate having a different composition each other, a film is stuck to one side of the polarizing plate, and by injection molding the same material as the film by an in-mold treatment, the film is integrated with the polarizing plate.
Other tec
Oka Koichiro
Okamoto Masahiko
Yamamoto Tamenobu
Boykin Terressa M.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Yamamoto Kogaku Co., Ltd.
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