JP2015049439A - Glass polarizer and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass polarizer having a wide wavelength band.SOLUTION: A glass polarizer 1 comprises: glass material 10; a plurality of polarization layers 11a and 11b. The plurality of polarization layers 11a and 11b is arranged on the glass material 10 respectively. The plurality of polarization layers 11a and 11b comprises a plurality of metal containing particles 12a and 12b oriented along one direction respectively. The plurality of polarization layers 11a and 11b comprises a plurality of kinds of polarization layers where at least one of the length and aspect ratio of the metal containing particles is different from each other.

Description

  The present invention relates to a glass polarizer and a method for producing the same.

  Conventionally, resin polarizers and glass polarizers (hereinafter referred to as “glass polarizers”) are used as polarizers. A glass polarizer is superior in durability, such as heat resistance and weather resistance, than a resin polarizer. For this reason, glass polarizers are frequently used for applications that require high durability.

  For example, Patent Document 1 describes an example of a glass polarizer. Patent Document 1 describes a glass polarizer containing particles containing copper halide and silver metal having an aspect ratio of 6: 1 to 300: 1.

  Patent Document 1 describes the following method as a method for producing a glass polarizer. First, a glass material containing halogen and copper is prepared. By heating the glass material, copper halide is precipitated in the glass material. Copper halide precipitates on the surface layer of the glass material. Thereafter, the copper halide is converted into particles containing copper halide and metallic silver by ion exchange. Therefore, in the glass polarizer described in Patent Document 1, particles containing copper halide and metallic silver are present in the surface layer.

JP-A-7-97235

  There is a desire to expand the wavelength range in which the polarizing function of a glass polarizer is manifested. In other words, there is a desire to increase the wavelength band of the glass polarizer.

  A main object of the present invention is to provide a glass polarizer having a wide wavelength band.

  The glass polarizer according to the present invention includes a glass material and a plurality of polarizing layers. Each of the plurality of polarizing layers is provided on a glass material. Each of the plurality of polarizing layers includes a plurality of metal-containing particles oriented along one direction. The plurality of polarizing layers include a plurality of types of polarizing layers in which at least one of the length and aspect ratio of the metal-containing particles is different from each other.

  It is preferable that at least one of the plurality of polarizing layers is provided inside the glass material.

  The glass material preferably contains at least one of Au ions, Cu ions, and Ag ions.

  The plurality of polarizing layers include a first polarizing layer provided inside the glass material and a second polarizing layer provided on the surface layer of the glass material, the first polarizing layer and the second polarizing layer, Thus, at least one of the length and the aspect ratio of the metal-containing particles may be different.

  It is preferable that at least two types of polarizing layers of the plurality of types of polarizing layers are laminated along one direction.

  At least two types of polarizing layers among the plurality of types of polarizing layers may be provided at different positions in plan view.

  The manufacturing method of the glass polarizer which concerns on this invention is related with the method of manufacturing the said glass polarizer. In the manufacturing method of the glass polarizer which concerns on this invention, the metal containing particle | grains contained in at least 1 type of polarizing layer of multiple types of polarizing layers are formed by irradiating a glass material with a laser beam.

  The first polarizing layer may be formed by irradiating the inside of the glass material with a laser beam, and then the second polarizing layer may be formed on the surface layer of the glass material by heating the glass material in an atmosphere.

  The glass material preferably contains at least one of Au ions, Cu ions, and Ag ions.

  According to the present invention, a glass polarizer having a wide wavelength band can be provided.

It is a typical sectional view of the glass polarizer concerning a 1st embodiment. It is typical sectional drawing for demonstrating the manufacturing process of the glass polarizer which concerns on 1st Embodiment. It is typical sectional drawing for demonstrating the manufacturing process of the glass polarizer which concerns on 1st Embodiment. It is a typical sectional view of a glass polarizer concerning a 2nd embodiment. It is a schematic plan view of the glass polarizer which concerns on 3rd Embodiment. It is typical sectional drawing of the line VI-VI part of FIG.

  Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

  Moreover, in each drawing referred in embodiment etc., the member which has a substantially the same function shall be referred with the same code | symbol. The drawings referred to in the embodiments and the like are schematically described. A ratio of dimensions of an object drawn in a drawing may be different from a ratio of dimensions of an actual object. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

  In each of FIGS. 1 to 4 and FIG. 6, hatching to be added to the cross section is omitted.

(First embodiment)
FIG. 1 is a schematic cross-sectional view of a glass polarizer according to the first embodiment. As shown in FIG. 1, the glass polarizer 1 includes a glass material 10. The kind of glass which comprises the glass material 10 is not specifically limited. The glass material 10 is, for example, silicate glass, borosilicate glass, phosphate glass, or the like, and glass containing at least one of Au ions, Cu ions, and Ag ions is formed by a draw method. Can be configured.

  The shape dimension of the glass material 10 is not specifically limited. The glass material 10 may be, for example, a plate shape, a lens shape, a rectangular parallelepiped shape, a spherical shape, an elliptical shape, a cylindrical lens shape, or the like. Hereinafter, in the present embodiment, an example in which the glass material 10 has a plate shape will be described.

  The glass material 10 is provided with a plurality of polarizing layers 11a and 11b. Specifically, in the present embodiment, the glass material 10 is provided with two polarizing layers, a first polarizing layer 11a and a second polarizing layer 11b. The first polarizing layer 11a and the second polarizing layer 11b are provided inside the glass material 10, respectively. For this reason, it is prevented that the 1st and 2nd polarizing layers 11a and 11b contact external air. Therefore, the first and second polarizing layers 11a and 11b are not easily altered.

  The first polarizing layer 11a and the second polarizing layer 11b are provided along the direction in which the main surface of the glass material 10 extends. The first polarizing layer 11a and the second polarizing layer 11b are provided over substantially the entire glass material 10 in plan view. The first polarizing layer 11a and the second polarizing layer 11b are stacked along the thickness direction.

  The first polarizing layer 11a has a plurality of metal-containing particles 12a. The plurality of metal-containing particles 12a are oriented along one direction. A polarization function is imparted to the first polarizing layer 11a by the plurality of metal-containing particles 12a.

  The second polarizing layer 11b has a plurality of metal-containing particles 12b. The plurality of metal-containing particles 12b are oriented along one direction. A polarization function is imparted to the second polarizing layer 11b by the plurality of metal-containing particles 12b. The orientation direction of the metal-containing particles 12b and the orientation direction of the metal-containing particles 12a may be the same or different.

  The metal-containing particles 12a and 12b only need to contain a metal. The metal-containing particles 12a and 12b may be made of, for example, metal, or may be made of metal oxide, metal chloride, metal sulfide, or the like.

  The metal-containing particles 12a and 12b have an elongated shape. The metal-containing particles 12a and 12b are preferably acicular. In order to change light having a wavelength longer than the visible range, the metal-containing particles 12a and 12b are preferably needle-shaped with an aspect ratio of 5: 1 or more. In order to change the light having a wavelength longer than the infrared region, the metal-containing particles 12a and 12b are preferably needle-shaped with an aspect ratio of 10: 1 or more. The metal-containing particles 12a and 12b may be needle-like crystals of a metal or a metal compound.

  The metal-containing particles 12a included in the first polarizing layer 11a and the metal-containing particles 12b included in the second polarizing layer 11b are different in at least one of length and aspect ratio. For this reason, the first polarizing layer 11a and the second polarizing layer 11b have different wavelength ranges of polarized light.

  As described above, the glass polarizer 1 has a plurality of types of polarizing layers 11a and 11b in which at least one of the length and the aspect ratio of the metal-containing particles is different from each other and the wavelength ranges of polarized light are different from each other. For this reason, the wavelength range which the glass polarizer 1 polarizes is wide. That is, the glass polarizer 1 has a wide wavelength band. When a wide wavelength band is required by the glass polarizer, three or more polarizing layers may be laminated along the thickness direction.

  In the present invention, the length and aspect ratio of the metal-containing particles in the polarizing layer are the average length and aspect ratio of the metal-containing particles included in the range of 1 mm × 1 mm of the cross section of the glass polarizer. .

  The manufacturing method of the glass polarizer 1 is not specifically limited. The glass polarizer 1 can be manufactured, for example, in the following manner.

  First, a glass material 10 is prepared by forming glass containing at least one of Au ions, Cu ions, and Ag ions by a draw method. Next, as shown in FIG. 2, a portion of the glass material 10 where the first polarizing layer 11a is to be formed is irradiated with laser light. Specifically, the laser light source 13 is placed along the direction in which the main surface of the glass material 10 extends in a state where the laser light is focused on the depth portion where the first polarizing layer 11a of the glass material 10 is to be formed. Scan. Thereby, the metal containing particle | grains 12a are deposited and the 1st polarizing layer 11a is formed.

  Next, as shown in FIG. 3, the portion of the glass material 10 where the second polarizing layer 11b is to be formed is irradiated with laser light so that the laser light does not pass through the first polarizing layer 11a formed in advance. To do. Specifically, the laser light source 13 is moved along the direction in which the main surface of the glass material 10 extends in a state where the laser light is focused on the depth portion where the second polarizing layer 11b of the glass material 10 is to be formed. Scan. Thereby, the metal-containing particles 12b are deposited to form the second polarizing layer 11b. The glass polarizer 1 can be completed by the above process.

  The first and second polarized light beams are simultaneously irradiated with laser light from a first laser light source disposed on one side of the glass material 10 and a second laser light source disposed on the other side of the glass material 10. The layers 11a and 11b may be formed simultaneously.

  Hereinafter, other examples of preferred embodiments of the present invention will be described. In the following description, members having substantially the same functions as those of the first embodiment are referred to by the same reference numerals, and description thereof is omitted.

(Second Embodiment)
FIG. 4 is a schematic cross-sectional view of a glass polarizer according to the second embodiment.

  As shown in FIG. 4, the glass polarizer 20 according to the present embodiment includes a first polarizing layer 11c, a second polarizing layer 11d, and a third polarizing layer 11e. The first polarizing layer 11c includes a plurality of metal-containing particles 12c oriented along one direction. The second polarizing layer 11d includes a plurality of metal-containing particles 12d oriented along one direction. The third polarizing layer 11e includes a plurality of metal-containing particles 12e oriented along one direction.

  The first polarizing layer 11 c is provided inside the glass material 10. The second polarizing layer 11 d is provided on the surface layer on one side of the glass material 10. The third polarizing layer 11 e is provided on the surface layer on the other side of the glass material 10.

  The first polarizing layer 11c can be formed by laser light irradiation, for example, in the same manner as the method described in the first embodiment. Each of the second polarizing layer 11d and the third polarizing layer 11e can be formed by laser light irradiation, or can be formed by heating the glass material 10 in an atmosphere. When the second and third polarizing layers 11d and 11e are formed by heating the glass material 10 in the atmosphere, the metal-containing particles 12d included in the second polarizing layer 11d and the metal included in the third polarizing layer 11e The length, aspect ratio, and orientation direction of the contained particles 12e are substantially the same. When the second and third polarizing layers 11d and 11e are formed by heating the glass material 10 in the atmosphere, the first polarizing layer 11c is formed before the second and third polarizing layers 11d and 11e. It is preferable to leave

  In the glass polarizer 20, at least one of the metal-containing particles 12c included in the first polarizing layer 11c, the metal-containing particles 12d included in the second polarizing layer 11d, and the metal-containing particles 12e included in the third polarizing layer 11e. On the other hand, at least one of length and aspect ratio is different. For this reason, the wavelength range of the polarized light is different between the first polarizing layer 11c and at least one of the second and third polarizing layers 11d and 11e. Therefore, the glass polarizer 20 according to the present embodiment also has a wide wavelength band.

(Third embodiment)
FIG. 5 is a schematic plan view of a glass polarizer according to the third embodiment. 6 is a schematic cross-sectional view taken along line VI-VI in FIG.

  1st and 2nd embodiment demonstrated the example in which each polarizing layer was provided in the substantially whole glass material in planar view. However, the present invention is not limited to this configuration. For example, at least one of the plurality of polarizing layers may be provided on a part of the glass material in a plan view.

  The glass polarizer 30 shown in FIGS. 5 and 6 has first to fourth polarizing layers 11f to 11i. The first to fourth polarizing layers 11f to 11i are respectively provided on a part of the glass material 10 in plan view. The first polarizing layer 11f and the second polarizing layer 11g are provided at different locations in plan view.

  The metal-containing particles 12f included in the first polarizing layer 11f and the metal-containing particles 12h included in the third polarizing layer 11h are different in at least one of length and aspect ratio. For this reason, the wavelength range of the light which the 1st polarizing layer 11f polarizes differs from the wavelength range of the light which the 3rd polarizing layer 11h polarizes. The first polarizing layer 11f and the third polarizing layer 11h are provided so as to overlap in the thickness direction.

  The metal-containing particles 12g included in the second polarizing layer 11g and the metal-containing particles 12i included in the fourth polarizing layer 11i are different in at least one of length and aspect ratio. For this reason, the wavelength range of the light which the 2nd polarizing layer 11g polarizes differs from the wavelength range of the light which the 4th polarizing layer 11i polarizes. The second polarizing layer 11g and the fourth polarizing layer 11i are provided so as to overlap in the thickness direction.

  Thus, also in the glass polarizer 30, the multiple types of polarizing layer from which the metal-containing particle contained differs in at least one of the length and aspect ratio is laminated | stacked on the thickness direction. Therefore, the glass polarizer 30 also has a wide wavelength band.

  The metal-containing particles 12f included in the first polarizing layer 11f have a length that is the same as that of each of the metal-containing particles 12g included in the second polarizing layer 11g and the metal-containing particles 12i included in the fourth polarizing layer 11i. And the aspect ratio may be substantially equal, or at least one of the length and the aspect ratio may be different. The metal-containing particles 12g included in the second polarizing layer 11g have a length and an aspect, respectively, of the metal-containing particles 12f included in the first polarizing layer 11f and the metal-containing particles 12h included in the third polarizing layer 11h. The ratios may be substantially equal, or at least one of length and aspect ratio may be different.

1, 20, 30: Glass polarizer 10: Glass materials 11a to 11i: Polarizing layers 12a to 12i: Metal-containing particles 13: Laser light source

Claims (9)

Glass material,
A plurality of polarizing layers provided on the glass material and including a plurality of metal-containing particles oriented along one direction;
With
The plurality of polarizing layers include a plurality of types of polarizing layers in which at least one of a length and an aspect ratio of the metal-containing particles is different from each other.   The glass polarizer according to claim 1, wherein at least one of the plurality of polarizing layers is provided inside the glass material.   The glass polarizer of Claim 1 or 2 in which the said glass material contains at least 1 type among Au ion, Cu ion, and Ag ion. The plurality of polarizing layers are:
A first polarizing layer provided inside the glass material;
A second polarizing layer provided on the surface layer of the glass material;
Including
The glass polarizer according to any one of claims 1 to 3, wherein at least one of a length and an aspect ratio of the metal-containing particles is different between the first polarizing layer and the second polarizing layer.   The glass polarizer according to any one of claims 1 to 4, wherein at least two kinds of polarizing layers of the plurality of kinds of polarizing layers are laminated along one direction.   The glass polarizer according to any one of claims 1 to 5, wherein at least two types of polarizing layers of the plurality of types of polarizing layers are provided at different positions in plan view. It is a manufacturing method of the glass polarizer according to any one of claims 1 to 6,
The manufacturing method of the glass polarizer which forms the metal containing particle | grains contained in the at least 1 type of polarizing layer of the said multiple types of polarizing layers by irradiating the said glass material with a laser beam.   The first polarizing layer is formed by irradiating a laser beam inside the glass material, and then the second polarizing layer is formed on the surface layer of the glass material by heating the glass material in an atmosphere. The manufacturing method of the glass polarizer of 7. The manufacturing method of the glass polarizer of Claim 7 or 8 in which the said glass material contains at least 1 type among Au ion, Cu ion, and Ag ion.

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