JP2022112874A - Mirror and mirror device - Google Patents

Abstract

To provide a mirror and a mirror device capable of obtaining a natural lighting effect by a simple constitution.SOLUTION: A mirror includes: a glass plate 11; a light reflection layer 12 laminated on a first region 21 of one side 11B of the glass plate 11; and a refractive index adjusting layer 14 which is constituted of a material different from the glass plate 11 and laminated on a second region 22 adjacent to the first region 21 on one side 11B of the glass plate 11. The second region 22 of the glass plate 11 is formed to be larger in the surface roughness than the first region 21 of the glass plate 11.SELECTED DRAWING: Figure 2

Description

The present invention relates to mirrors and mirror devices.

2. Description of the Related Art In order to improve the appearance of a face or the like reflected in a mirror, a mirror device with illumination is known (for example, Patent Document 1). The mirror device described in Patent Literature 1 is configured such that light is scattered from the entire periphery of the mirror body through the light transmitting body, and the entire face is illuminated. As a result, shadows on the face and the like caused by external light can be offset. However, there is a problem that the influence of color due to external light such as an incandescent lamp cannot be eliminated.

Patent Document 2 discloses a scene changeover switch having a plurality of LEDs, a color temperature sensor, and a plurality of contact points for switching between daytime, nighttime, and indoor scenes, and switching by the scene changeover switch based on the detected value of the color temperature sensor. and a controller for toning the LEDs depending on the scene. In the mirror device described in Patent Literature 2, by adjusting the color of the LED based on the detection value of the color temperature sensor, the face, etc. can be viewed on the mirror in a state in which lighting effects are obtained according to daytime, nighttime, indoors, etc. can be projected on

Japanese Patent Application Laid-Open No. 2007-330685 JP 2012-148029 A

The mirror device described in Patent Literature 2 requires a color temperature sensor, a scene changeover switch, a control section for toning the LEDs, and the like, which makes the configuration of the mirror device complicated. In addition, it is difficult to obtain a natural lighting effect in the mirror device with a configuration in which the colors of the LEDs are toned. Therefore, there is room for improvement in mirrors and mirror devices in obtaining natural lighting effects.

In view of the above situation, a mirror and a mirror device that can obtain a natural lighting effect with a simple structure are desired.

A mirror according to the present invention is characterized by comprising a glass plate, a light reflecting layer laminated in a first region on one side of the glass plate, and a material different from that of the glass plate. and a refractive index adjusting layer laminated on a second region adjacent to the first region, wherein the second region of the glass plate is formed to have a larger surface roughness than the first region of the glass plate. in the point.

According to this configuration, the second region that does not have a mirror-finished light reflecting layer on one surface of the glass plate has a larger surface roughness than the first region of the glass plate. Therefore, the second region can increase the HAZE and enhance the light diffusion effect due to the unevenness formed on the surface. Furthermore, since the refractive index adjustment layer made of a material different from that of the glass plate is laminated in the second region, the HAZE in the second region can be adjusted by the refractive index adjustment layer. As a result, the second region of the mirror, which does not have the light reflecting layer, can have an appropriate light scattering function due to the irregularities on the surface of the glass plate and the refractive index adjusting layer. As a result, the mirror can obtain a natural lighting effect from the second area by irradiating illumination light from the back side of the mirror (one side where the unevenness is formed).

Another characteristic configuration is that a laminated region including the second region and the refractive index adjusting layer of the glass plate has a HAZE of 15% or more and 40% or less.

As in this configuration, when the HAZE of the laminated region including the second region of the glass plate and the refractive index adjustment layer in the mirror is 15% or more and 40% or less, the second region of the mirror is irradiated from the back side of the mirror. Illumination light can be widely diffused.

Another characteristic configuration is that the diffuse transmittance in the laminated region including the second region and the refractive index adjustment layer of the glass plate is 10% or more and 35% or less.

According to this configuration, when the diffuse transmittance of the laminated region including the second region of the glass plate and the refractive index adjustment layer in the mirror is 10% or more and 35% or less, the second region of the mirror is irradiated from the back side of the mirror. Illumination light can be widely diffused.

Another feature is that the refractive index adjustment layer is made of urethane resin.

According to this configuration, since the refractive index adjusting layer is made of urethane resin, the refractive index adjusting layer laminated on the uneven portion of the second region can be easily constructed. In addition, urethane resin has high waterproof performance and high chemical resistance compared to alkyd resin, which is a conventional protective layer. Therefore, even if the mirror is washed repeatedly, it can maintain its durability. In addition, urethane resin is resistant to discoloration and has high weather resistance.

Another characteristic configuration is that the second region is provided around the first region.

In the mirror, the first region is the portion that functions as a mirror. By providing the second area around the first area as in this configuration, a large first area can be ensured.

Another feature is that the difference between the refractive index of the glass plate and the refractive index of the refractive index adjustment layer is 0.005 or more.

The HAZE of the lamination region including the glass plate and the refractive index adjustment layer increases in proportion to the difference in refractive index between the two. A suitable light diffusing effect can be obtained in the lamination region by setting the HAZE to a predetermined value or more. However, if the difference in refractive index between the two is too small, the laminated region including the glass plate and the refractive index adjustment layer cannot increase the HAZE to a predetermined value or more. Therefore, the difference between the refractive index of the glass plate and the refractive index of the refractive index adjusting layer is preferably 0.005 or more. When the difference in refractive index between the two is 0.005 or more, it becomes easy to increase the HAZE of the lamination region of the mirror to a predetermined value or more. Here, the difference between the two refractive indices can be calculated by defining the refractive index as the refractive index for the d-line (wavelength 587.6 nm), for example, and measuring it.

Another feature is that the refractive index adjustment layer has a thickness of 1.0 μm or more.

The HAZE of the laminated region including the glass plate and the refractive index adjusting layer increases in proportion to the thickness of the refractive index adjusting layer. However, if the thickness of the refractive index adjusting layer is too small, the laminated region including the glass plate and the refractive index adjusting layer cannot increase the HAZE to a predetermined value or more. Therefore, the thickness of the refractive index adjusting layer is preferably 1.0 μm or more. When the thickness of the refractive index adjustment layer is 1.0 μm or more, it becomes easy to increase the HAZE of the lamination region of the mirror to a predetermined value or more. Further, by increasing the thickness of the refractive index adjusting layer, the durability of the refractive index adjusting layer and the mirror is improved.

Another characteristic configuration is that the second region of the glass plate has an arithmetic mean roughness Ra of 0.1 μm or more and 200 μm or less as surface roughness.

The HAZE of the laminated region including the glass plate and the refractive index adjusting layer increases in proportion to the arithmetic mean roughness Ra, which is an index of the surface roughness of the second region of the glass plate. However, if the arithmetic mean roughness Ra is too small, the laminated region including the glass plate and the refractive index adjusting layer cannot increase the HAZE to a predetermined value or higher. Therefore, it is preferable that the arithmetic mean roughness Ra as the surface roughness of the second region of the glass plate is 0.1 μm or more. When the arithmetic mean roughness Ra in the second region is 0.1 μm or more, the HAZE of the laminated region of the mirrors can be easily increased to a predetermined value or more. However, if the arithmetic mean roughness Ra is too large, the difference in surface roughness tends to widen in the second region of the glass plate, so there is a possibility that a suitable light scattering effect cannot be obtained, and the strength of the mirror is reduced. There is also the possibility that it will decline. Therefore, the arithmetic mean roughness Ra as the surface roughness of the second region of the glass plate is preferably 200 μm or less.

The point is that an adhesive layer is provided between the second region of the glass plate and the refractive index adjusting layer.

According to this configuration, the adhesive layer can reliably fix the refractive index adjustment layer to the second region.

Another feature is that the refractive index adjusting layer is laminated over the light reflecting layer.

The light reflecting layer laminated on the glass plate to form a mirror surface is formed of, for example, a silver film. In addition to the difference in surface roughness between the first and second regions of the glass plate, acidic or alkaline chemicals used to clean the mirror may enter the boundary between the first and second regions. have a nature. Also, the silver film can be corroded by contact with acids and cleaning chemicals. Therefore, in this configuration, the refractive index adjusting layer is laminated over the light reflecting layer. That is, the refractive index adjustment layer is provided from the second region to the first region. With this configuration, the mirror can protect not only the second region but also the first region having the light reflecting layer by the refractive index adjusting layer. Further, since the boundary between the first region and the second region is covered with the refractive index adjusting layer, it is possible to prevent penetration of chemicals from the boundary and suppress corrosion of the light reflecting layer.

Another characteristic configuration is that a light diffusion layer is further laminated on the refractive index adjusting layer laminated on the second region of the glass plate.

According to this configuration, the diffusion transmittance of the illumination light emitted from the rear side of the mirror can be increased in the second region of the mirror by the light diffusion layer.

Another characteristic configuration is that a laminated region including the second region, the refractive index adjustment layer, and the light diffusion layer of the glass plate has a HAZE of 60% or more.

As in this configuration, when the HAZE of the laminated region including the second region of the glass plate, the refractive index adjustment layer, and the light diffusion layer in the mirror is 60% or more, the second region of the mirror is irradiated from the back side of the mirror. Illumination light can be diffused more widely.

Another characteristic configuration is that a laminated region including the second region, the refractive index adjustment layer, and the light diffusion layer of the glass plate has a diffuse transmittance of 50% or more.

According to this configuration, when the diffuse transmittance of the laminated region including the second region of the glass plate, the refractive index adjustment layer, and the light diffusion layer in the mirror is 50% or more, the second region of the mirror can The irradiated illumination light can be diffused more widely.

A characteristic configuration of the mirror device according to the present invention is that it includes the mirror configured as described above and an illumination section capable of irradiating illumination light from the one side toward the second region.

According to this configuration, a natural lighting effect can be exhibited in the mirror device, and the appearance of the face or the like reflected in the mirror can be improved.

It is a front view of a mirror device of a 1st embodiment. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1; It is sectional drawing of the mirror apparatus of 2nd Embodiment. It is a table showing examples and comparative examples. It is a front view of the mirror apparatus of other embodiment. It is a front view of the mirror apparatus of other embodiment. It is a front view of the mirror apparatus of other embodiment.

EMBODIMENT OF THE INVENTION Below, embodiment of the mirror which concerns on this invention, and a mirror apparatus is described based on drawing. However, without being limited to the following embodiments, various modifications are possible without departing from the scope of the invention.

[First embodiment]
As shown in FIGS. 1 and 2, the mirror device 1 includes a mirror 10 and an illumination section 30. As shown in FIG. The mirror 10 includes a glass plate 11 having a first region 21 laminated with a mirror layer 12 (an example of a light reflecting layer) and a second region 22 not laminated with the mirror layer 12 . The glass plate 11 has a front surface 11A and a back surface 11B (an example of one side). The first region 21 and the second region 22 are arranged on the rear surface 11B of the glass plate 11 and are adjacent to each other.

The second region 22 is formed to have a larger surface roughness than the first region 21 of the glass plate 11 . In the second region 22, a primer layer 13 (an example of an adhesive layer) and a refractive index adjusting layer 14 are laminated in this order. The refractive index adjustment layer 14 is made of a material different from that of the glass plate 11 .

As the glass plate 11, a known glass for mirrors can be used, such as soda-lime glass. As shown in FIG. 1, the glass plate 11 of this embodiment is formed in a rectangular shape. The specular layer 12 is a metal film made of silver or a silver alloy and copper. The copper film is provided to prevent corrosion of the silver film. However, in this embodiment, since the refractive index adjusting layer 14 is laminated on the upper surface of the specular layer 12, it is not necessary to laminate the copper film on the silver film. Examples of methods for forming the specular layer 12 include electroless plating, vacuum deposition, and sputtering. The thickness of the glass plate 11 is preferably 1 mm or more and 15 mm or less, more preferably 3 mm or more and 8 mm or less.

The irregularities on the surface of the second region 22 can be formed by, for example, sandblasting, which is a type of shotblasting. The second region 22 of the glass plate 11 becomes more white due to the irregularities formed on the surface.

The primer layer 13 is a silane coupling agent or the like and is applied to improve the adhesion of the refractive index adjustment layer 14 .

The refractive index adjustment layer 14 is formed, for example, by applying a urethane resin or performing sputtering transfer. If the refractive index adjusting layer 14 is made of urethane resin, the refractive index adjusting layer 14 laminated on the second region 22 can be easily constructed. In addition, urethane resin has high waterproof performance and high chemical resistance compared to alkyd resin, which is a conventional protective layer. Therefore, even if the mirror 10 is washed repeatedly, it can maintain its durability. The refractive index adjustment layer 14 may be formed using phthalic acid resin, acrylic resin, silicone resin, fluororesin, epoxy resin, or the like.

It is preferable that the HAZE (haze) in the laminated region including the second region 22 of the glass plate 11 and the refractive index adjusting layer 14 is 15% or more and 40% or less. As a result, a predetermined HAZE is ensured in the mirror 10 , so that the illumination light emitted from the back side of the mirror 10 can be widely diffused in the second region 22 of the mirror 10 .

The diffuse transmittance in the laminated region including the second region 22 of the glass plate 11 and the refractive index adjustment layer 14 is 10% or more and 35% or less. As a result, a predetermined diffuse transmittance is ensured, so that the illumination light emitted from the rear side of the mirror 10 can be diffused appropriately in the second region 22 of the mirror 10 . HAZE and total light transmittance (TT) can be calculated from the following equations 1 and 2 by measuring diffuse transmittance (DIF) and parallel line transmittance (PT).
(Number 1)
HAZE (%) = (DIF/TT) x 100
DIF: diffuse transmittance (%)
TT: total light transmittance (%)
(Number 2)
TT = PT + DIF
PT: Parallel line transmittance (%)

In this embodiment, the second region 22 is surrounded by the first region 21 in the mirror 10, the first region 21 is arranged over most of the center and the circumference of the glass plate 11, and the second region 22 is glass. They are arranged on the left and right sides of the plate 11 . The shape of the second region 22 is a rectangular shape along the sides of the glass plate 11 .

A primer layer 13 is provided between the second region 22 of the glass plate 11 and the refractive index adjusting layer 14 . Thereby, the primer layer 13 can reliably fix the refractive index adjusting layer 14 to the uneven second region 22 .

The refractive index adjusting layer 14 is laminated on the entire back surface 11B of the glass plate 11 . That is, the refractive index adjustment layer 14 is laminated not only on the second region 22 but also on the mirror surface layer 12 of the first region 21 . The mirror surface layer 12 of the glass plate 11 is formed of a silver film or the like. Here, the silver film may be corroded by contact with acidic or alkaline chemicals. Therefore, in this embodiment, the refractive index adjusting layer 14 is laminated over the mirror surface layer 12 . As a result, the specular layer 12 of the glass plate 11 can be protected by the refractive index adjusting layer 14, so corrosion of the specular layer 12 can be suppressed.

A method for manufacturing the mirror 10 is, for example, as follows. On the back surface 11B of the glass plate 11, the specular layer 12 is formed in the first area 21, which is a preset area. A region having no mirror layer 12 is formed as a second region 22 on the glass plate 11 other than the first region 21 . Next, the second region 22 is sandblasted. As a result, the surface of the second region 22 of the glass plate 11 is roughened, and the glass plate 11 is given whiteness. That is, the HAZE increases in the plate thickness portion including the second region 22 in the mirror 10 . By roughening the surface of the second region 22, the HAZE of the second region 22 can be increased, for example, to about 90%. Next, the primer layer 13 and the refractive index adjusting layer 14 are sequentially laminated on the entire back surface 11B of the glass plate 11 (the first region 21 and the second region 22). Specifically, a primer layer 13 formed of a silane coupling agent or the like is applied to the rear surface 11B of the glass plate 11, and a transparent refractive index adjustment layer 14 formed of urethane resin or the like is applied on the primer layer 13. do. Thereby, the HAZE of the second region 22 of the glass plate 11 can be adjusted. That is, by changing the refractive index and thickness of the refractive index adjustment layer 14 according to the size of the HAZE of the second region 22 before the refractive index adjustment layer 14 is laminated, the HAZE of the second region 22 is adjusted to an appropriate value. value can be adjusted. As another manufacturing method of the mirror 10, the specular layer 12 of silver film may be formed on the entire back surface 11B of the glass plate 11, and the second region 22 may be formed by sandblasting the specular layer 12. The second region 22 may be formed by peeling the mirror layer 12 from the glass plate 11 by other mechanical polishing, or by peeling the mirror layer 12 from the glass plate 11 by chemical polishing such as etching or electrolytic polishing. may

In this embodiment, the second region 22 having no mirror surface layer 12 on the rear surface 11B of the glass plate 11 is formed to have a surface roughness larger than that of the first region 21 of the glass plate 11 . As a result, the HAZE of the second region 22 increases due to the unevenness of the surface, so that the mirror 10 can enhance the light diffusion effect in the second region 22 . Furthermore, since the refractive index adjustment layer 14 made of a material different from that of the glass plate 11 is laminated in the second region 22 , the HAZE in the second region 22 can be adjusted by the refractive index adjustment layer 14 . Also, the second region 22 can be protected by the refractive index adjustment layer 14 . Accordingly, a proper light scattering function can be added to the second region 22 of the mirror 10 that does not have the mirror surface layer 12 . As a result, the mirror 10 can obtain a natural lighting effect from the second region 22 by irradiating the illumination light from the rear side of the mirror 10 .

Generally, the HAZE of the laminated region including the glass plate 11 and the refractive index adjustment layer 14 increases in proportion to the difference in refractive index between the two. A suitable light diffusing effect can be obtained in the lamination region by setting the HAZE to a predetermined value or more. However, if the difference in refractive index between the two is too small, the laminated region including the glass plate 11 and the refractive index adjustment layer 14 lacks whiteness for light diffusion, and the HAZE cannot be increased to a predetermined value or more. . Therefore, the difference between the refractive index of the glass plate 11 and the refractive index of the refractive index adjustment layer 14 is preferably 0.005 or more. When the difference in refractive index between the two is 0.005 or more, the HAZE of the lamination region of the mirror 10 can be easily increased to a predetermined value or more. Note that the refractive index of the same substance varies depending on the wavelength of light. Therefore, here, the refractive index is defined as a value at the d-line (wavelength of 587.6 nm), and the difference between the refractive index of the glass plate 11 and the refractive index of the refractive index adjustment layer 14 at that time is 0.005 or more. do. The difference between the refractive index of the glass plate 11 and the refractive index of the refractive index adjustment layer 14 is more preferably 0.010 or more, and even more preferably 0.050 or more.

Also, the HAZE of the laminated region including the glass plate 11 and the refractive index adjustment layer 14 increases in proportion to the thickness of the refractive index adjustment layer 14 . However, if the thickness of the refractive index adjusting layer 14 is too small, the lamination region including the glass plate 11 and the refractive index adjusting layer 14 lacks whiteness for light diffusion, and the HAZE may be increased to a predetermined value or more. Can not. Therefore, the thickness of the refractive index adjustment layer 14 is preferably 1.0 μm or more. When the thickness of the refractive index adjustment layer 14 is 1.0 μm or more, it becomes easy to increase the HAZE of the laminated region of the mirror 10 to a predetermined value or more. The thickness of the refractive index adjustment layer 14 is more preferably 2.0 μm or more, and even more preferably 5.0 μm or more. The upper limit of the thickness of the refractive index adjustment layer 14 is determined based on the desired value of HAZE in the laminated region of the mirror 10 .

Also, regarding the surface roughness of the second region 22 of the glass plate 11, the HAZE of the laminated region including the glass plate 11 and the refractive index adjustment layer 14 is proportional to the arithmetic mean roughness Ra, which is an index of the surface roughness. and grow. However, if the arithmetic mean roughness Ra is too small, the lamination region including the glass plate 11 and the refractive index adjustment layer 14 lacks whiteness for light diffusion, and the HAZE cannot be increased to a predetermined value or higher. Therefore, it is preferable that the arithmetic mean roughness Ra as the surface roughness of the second region 22 of the glass plate 11 is 0.1 μm or more. When the arithmetic mean roughness Ra of the second region 22 is 0.1 μm or more, the HAZE of the lamination region of the mirror 10 can be easily increased to a predetermined value or more. However, if the arithmetic mean roughness Ra is too large, the difference in surface roughness tends to widen in the second region 22 of the glass plate 11, so there is a possibility that a suitable light scattering effect cannot be obtained. There is also a risk that the strength of the Therefore, the arithmetic mean roughness Ra as the surface roughness of the second region 22 of the glass plate 11 is preferably 200 μm or less. The arithmetic mean roughness Ra is more preferably 0.5 μm or more and 100 μm or less, and further preferably 1.0 μm or more and 50 μm or less.

The mirror device 1 includes a mirror 10 and an illumination section 30 capable of illuminating the second region 22 from the rear surface 11B side. The lighting unit 30 can be configured using, for example, a light emitting diode (LED), a liquid crystal display (LCD), a vacuum fluorescent display (VFD), or an organic EL (OLED).

[Second embodiment]
As shown in FIG. 3 , the mirror 10 in the mirror device 1 of this embodiment is laminated on the second region 22 of the glass plate 11 , and the light diffusion layer 15 is further laminated on the refractive index adjustment layer 14 . Other configurations of the mirror device 1 are the same as those of the first embodiment, so description thereof is omitted.

The light diffusing layer 15 can be formed by mixing aluminum hydroxide as a light diffusing material into a transparent liquid agent (eg, transparent paint), for example. Examples of resins used for the transparent liquid agent include urethane resins, phthalate resins, acrylic resins, silicon resins, fluorine resins, and epoxy resins. By laminating the light diffusion layer 15 on the refractive index adjustment layer 14, the HAZE of the laminated region in the second region 22 of the mirror 10 and the diffusion transmittance of the illumination light can be increased. Light diffusion materials contained in the light diffusion layer 15 include talc (eg, RL119 manufactured by Fuji Talc Co., Ltd.), glass beads (eg, GB-T20 manufactured by Potters Ballotini Co., Ltd.), titanium oxide, and hydroxide. Calcium or the like may also be used. Other white inorganic powder can also be used as the light diffusing material. If the amount of the light diffusion material in the light diffusion layer 15 is too small, the HAZE or diffuse transmittance in the laminated region of the second region 22 will not increase. The translucency in the laminated region of region 22 becomes too low. Therefore, the amount of the light diffusion material in the light diffusion layer 15 is preferably 0.1% by weight or more and 40% by weight or less.

Also, the HAZE of the laminated region of the second region 22 of the mirror 10 increases in proportion to the thickness of the light diffusion layer 15 . However, if the thickness of the light diffusion layer 15 is too small, the lamination region lacks whiteness for light diffusion, and the HAZE cannot be increased to a predetermined value or more. Therefore, the thickness of the light diffusion layer 15 is preferably 1.0 μm or more. When the thickness of the light diffusion layer 15 is 1.0 μm or more, it becomes easy to increase the HAZE of the laminated region of the mirror 10 to a predetermined value or more. The thickness of the light diffusion layer 15 is more preferably 2.0 μm or more, and even more preferably 5.0 μm or more. The upper limit of the thickness of the light diffusing layer 15 is determined based on the desired HAZE value in the laminated region of the mirror 10 .

In the mirror 10, the higher the HAZE or the diffuse transmittance in the laminated region of the second region 22, the higher the diffusion of the illumination light in the second region 22, and the illumination light irradiated from the surface 11A side of the second region 22 is natural light. will come closer. However, if the HAZE or the diffuse transmittance in the laminated region of the second region 22 is too small, the second region 22 may not sufficiently diffuse the illumination light. Therefore, in the laminated region including the second region 22 of the glass plate 11, the refractive index adjustment layer 14, and the light diffusion layer 15, the HAZE is preferably 60% or more, and the diffuse transmittance is preferably 50% or more. preferable. The second region 22 has a HAZE of 60% or more or a diffuse transmittance of 50% or more in the laminated region, so that the second region 22 of the mirror 10 can diffuse the illumination light emitted from the back side of the mirror 10. can be sufficiently secured.

In the laminated region in the second region 22 of the mirror 10, the HAZE is more preferably 70% or more, and even more preferably 80% or more. Further, in the lamination region, the diffuse transmittance is more preferably 60% or more, and more preferably 70% or more.

〔Example〕
Examples that more specifically disclose the present invention are shown below. It should be noted that the present invention is not limited only to these examples.

HAZE, diffuse transmittance (DIF), etc. were measured using Examples 1 to 10 shown in the table of FIG. Examples 1 to 10 are samples assuming a laminated region including the second region 22 of the mirror 10, and the comparative example is a single glass plate. In Examples 1 to 9, only the refractive index adjusting layer 14 is laminated on one side of the glass plate. In Example 10, a refractive index adjusting layer 14 and a light diffusion layer 15 are laminated on one side of the glass plate. Each of the glass plates in Examples 1 to 10 and Comparative Example had a rectangular shape of 100 mm×150 mm and a thickness of 5 mm. In Examples 1 to 10, as the primer layer 13, a silane coupling agent KBE-903 (manufactured by Shin-Etsu Chemical Co., Ltd.) was applied to 1 μm, and as the refractive index adjustment layer 14, Retan PG80 (urethane resin paint, Kansai Paint Co., Ltd. ) was applied. In Example 10, as the light diffusion layer 15, a mixture of 20% by weight of aluminum hydroxide (C-310, manufactured by Sumitomo Chemical Co., Ltd.) in Retan PG80 (manufactured by Kansai Paint Co., Ltd.) was coated to a thickness of 15 μm. .

The refractive index was measured using a spectroscopic ellipsometer. Here, the refractive index is a value obtained when a d-line (wavelength: 587.6 nm) light beam is used. The refractive index difference (|n1-n2|) was calculated from the measured values of the respective refractive indices. HAZE and total light transmittance (T.T) were measured using a HAZE meter (NDH-5000, manufactured by Nippon Denshoku Industries Co., Ltd.). Parallel line transmittance (P.T) and diffuse transmittance (DIF) were calculated using measurements of HAZE and total light transmittance (T.T). The surface roughness was measured using a surface roughness measuring instrument (SJ-500, manufactured by Mitutoyo Corporation). The measurement results are as shown in the table of FIG. As for the refractive index of the refractive index adjustment layer 14, it can be understood from the measurement results shown in FIG. 4 that there is almost no effect due to the size of the thickness, and variations in values are small.

[About measurement results]
When Example 1 and Example 4 are compared, there is no significant difference in the refractive index difference (|n1−n2|) and the arithmetic average roughness Ra, but the thickness of the refractive index adjustment layer 14 is the same as in Example 4. Example 4, which is 30 times or more as large as 1, has a larger HAZE value. When Example 2 and Example 3 are compared, there is no significant difference in the values of the refractive index difference and the thickness of the refractive index adjustment layer 14, but the arithmetic mean roughness Ra is 170 times that of Example 2. The HAZE value of Example 3, which is the above value, is larger. When Example 1 and Example 3 are compared, there is no significant difference in the values of the arithmetic mean roughness Ra and the thickness of the refractive index adjustment layer 14, but the refractive index difference is five times that of Example 1. The value of HAZE is larger in Example 3, which is the value of . That is, in Examples 1 to 4, the HAZE of the laminated region including the second region 22 in the mirror 10 was proportional to the refractive index difference, the size of the arithmetic mean roughness Ra, and the thickness of the refractive index adjustment layer 14. proven to grow.

The HAZE of Examples 1-10 is higher than the HAZE of the Comparative Example (0.24%). Therefore, all of Examples 1 to 10 have improved light diffusibility over the comparative example. However, in Examples 1 to 4, since the HAZE is less than 15%, the light diffusibility is low. In Example 5, the arithmetic mean roughness Ra is small, but the refractive index difference and the thickness of the refractive index adjustment layer 14 are large, so the HAZE is increased to 18.1% (15% or more). In Examples 6 to 9, the refractive index difference is 0.005 or more, the arithmetic mean roughness Ra is 0.1 μm or more, the thickness of the refractive index adjustment layer 14 is 1 μm or more, and the HAZE is increased to 20% or more. . Therefore, in Examples 5 to 9, the light diffusibility is improved. Also in Example 10, the refractive index difference is 0.01 or more, the arithmetic mean roughness Ra is 0.1 μm or more, the thickness of the refractive index adjustment layer 14 is 1 μm or more, and the light diffusion layer 15 is provided. is increased to over 90%. Therefore, in Example 10, the light diffusibility is further improved.

The weather resistance of the mirror 10 was verified by conducting the following chemical resistance test (mirror chemical resistance pre-test). A glass plate of 100 mm×150 mm and a thickness of 5 mm was used as a test object, and a sample in which a mirror layer 12 was laminated on half of one surface of the glass plate was used. A silver film of 70 nm to 120 nm was used as the mirror layer 12 . The sample was sandblasted in a region (corresponding to the second region 22) having no mirror surface layer 12 on one side of the glass plate, and the following was used as the primer layer 13, the refractive index adjustment layer 14, and the light diffusion layer 15. It was laminated on the entire surface of the glass plate 11 on the side where the mirror surface layer 12 was present. As the primer layer 13, a silane coupling agent KBE-903 (manufactured by Shin-Etsu Chemical Co., Ltd.) was used. As the refractive index adjustment layer 14, 15 μm thick Retan PG80 (urethane resin paint, manufactured by Kansai Paint Co., Ltd.) was used. As the light diffusing layer 15, a mixture of 20% by weight of aluminum hydroxide (C-310, manufactured by Sumitomo Chemical Co., Ltd.) in retane PG80 was coated to a thickness of 15 μm.

As a chemical resistance test, the above sample was immersed in 10% diluted Sunpol (manufactured by Dainippon Pyrethrum Co., Ltd.), which is an acidic chemical, and Kabikiller undiluted solution (manufactured by Johnson Co., Ltd.), which is an alkaline chemical, for 24 hours. I checked the status after the passage of time. After 24 hours had elapsed, the sample had a slightly increased whiteness in the portion corresponding to the second region 22, and no corroded portion was found. Therefore, in this chemical resistance test, it was confirmed that the weather resistance of the mirror 10 of the above embodiment was improved.

The sample used for the chemical resistance test had the refractive index adjustment layer 14 extending from the second region 22 to the first region 21 of the glass plate 11, like the mirror 10 of the first and second embodiments. Laminated. As a result, the boundary portion between the first region 21 having the mirror layer 12 and the second region 22 not having the mirror layer 12 is sealed by the refractive index adjustment layer 14 . As a result, it is considered that the refractive index adjustment layer 14 prevents penetration of the chemical from the boundary portion, thereby improving the weather resistance of the sample. Therefore, the weather resistance can be improved even in the mirror 10 having the same configuration as the sample. In addition, the urethane resin used as the refractive index adjustment layer 14 has high waterproof performance, and since it contains a curing agent, it is also a resin with high chemical resistance.

[Another embodiment]
(1) In the above embodiment, the mirror 10 has the second regions 22 arranged on the left and right sides of the glass plate 11, but the positions of the second regions 22 are not particularly limited. For example, as shown in FIG. 5 , the second region 22 may be arranged adjacent to the first region 21 on the surface of the glass plate 11 . In the mirror 10, the first region 21 is a portion that functions as a mirror. By providing the second region 22 around the first region 21 as in this embodiment, the first region 21 can be widened in the mirror 10 . As shown in FIG. 6 , the second region 22 may be provided adjacent to the periphery of the first region 21 , and the first region 21 may also be provided adjacent to the periphery of the second region 22 . As shown in FIG. 7 , a third region 23 different from the first region 21 and the second region 22 may exist between the first region 21 and the second region 22 . The third region 23 is, for example, a portion of the back surface 11B of the glass plate 11 that does not have the specular layer 12 and has a flat surface. That is, in the example shown in FIG. 7, the first region 21 and the second region 22 are not adjacent to each other in the mirror 10, but the first region 21 and the second region 22 are adjacent to each other. The third region 23 may be a region configured so as not to transmit light.

(2) In the above embodiment, the glass plate 11 has a rectangular shape, but the shape of the glass plate 11 is not limited to this. The shape of the glass plate 11 may be square, polygonal such as triangular, pentagonal, or hexagonal, or may be circular or elliptical.

(3) In the above embodiment, an example in which the primer layer 13 is arranged as an adhesive layer is shown, but the refractive index adjustment layer 14 may be laminated on the second region 22 of the glass plate 11 without an adhesive layer interposed therebetween. .

(4) In the above embodiment, in the mirror 10, not only the second region 22 but also the first region 21 having the mirror surface layer 12 is laminated with the refractive index adjustment layer 14 and the light diffusion layer 15. The refractive index adjustment layer 14 and the light diffusion layer 15 may be laminated only on the second region 22 , or at least one of the refractive index adjustment layer 14 and the light diffusion layer 15 may be laminated on the first region 21 . Also, in the mirror 10, an alkyd resin may be laminated on the outer surface of the specular layer 12 instead of the refractive index adjusting layer 14. FIG.

(5) The mirror 10 may be coated with an edge coating material made of epoxy resin or the like on the outer edge portion of the back surface 11B. By arranging the edge coating material on the mirror 10, the corrosion resistance of the mirror 10 can be improved.

(6) In the above embodiment, the second regions 22 are arranged continuously along the outer edge of the glass plate 11 on the back surface 11B of the glass plate 11. However, the arrangement of the second regions 22 is 11 may be scattered on the rear surface 11B of the mirror 11, and the shape and arrangement of the second regions 22 can be appropriately set according to the use of the mirror 10. FIG. In addition, in the above-described embodiment, the shape of the second region 22 in the glass plate 11 is a rectangular shape or a rectangular frame shape, but the shape of the second region 22 is not limited to this. The shape of the second region 22 may be a square, a polygon such as a triangle, a pentagon, or a hexagon, or may be circular or elliptical.

(7) In the above embodiment, the outermost layer on the back surface 11B side of the mirror 10 is the refractive index adjustment layer 14 or the light diffusion layer 15 . The mirror 10 may further laminate a shield layer such as silica coating on the refractive index adjustment layer 14 or the light diffusion layer 15 . Silica coating is realized, for example, by applying a silica coating agent. The mirror 10 can be improved in antifouling property, anticorrosion property, etc. by silica coating.

The invention can be widely applied to mirrors and mirror devices.

1: mirror device 10: mirror 11: glass plate 11A: front surface 11B: back surface (one side)
12: Mirror layer 13: Primer layer (adhesive layer)
14: refractive index adjustment layer 15: light diffusion layer 21: first region 22: second region 23: third region 30: illumination section

Claims (14)

a glass plate and
a light reflecting layer laminated on a first region on one side of the glass plate;
a refractive index adjustment layer made of a material different from that of the glass plate and laminated on a second region adjacent to the first region on the one side of the glass plate;
The mirror, wherein the second region of the glass plate has a larger surface roughness than the first region of the glass plate. 2. The mirror according to claim 1, wherein the laminated region including the second region and the refractive index adjusting layer of the glass plate has a HAZE of 15% or more and 40% or less. 3. The mirror according to claim 1, wherein the diffuse transmittance of the laminated region including the second region and the refractive index adjusting layer of the glass plate is 10% or more and 35% or less. 4. The mirror according to any one of claims 1 to 3, wherein the refractive index adjusting layer is made of urethane resin. 5. The mirror according to any one of claims 1 to 4, wherein said second region is provided around said first region. 6. The mirror according to claim 1, wherein the difference between the refractive index of said glass plate and the refractive index of said refractive index adjustment layer is 0.005 or more. 7. The mirror according to any one of claims 1 to 6, wherein the refractive index adjusting layer has a thickness of 1.0 [mu]m or more. The mirror according to any one of claims 1 to 7, wherein the second region of the glass plate has an arithmetic mean roughness Ra of 0.1 µm or more and 200 µm or less as surface roughness. 9. The mirror according to any one of claims 1 to 8, further comprising an adhesive layer between said second region of said glass plate and said refractive index adjusting layer. 10. The mirror according to any one of claims 1 to 9, wherein the refractive index adjusting layer is laminated over the light reflecting layer. 11. The mirror according to any one of claims 1 to 10, wherein a light diffusion layer is further laminated on said refractive index adjusting layer laminated on said second region of said glass plate. 12. The mirror according to claim 11, wherein the laminated region including the second region, the refractive index adjustment layer, and the light diffusion layer of the glass plate has a HAZE of 60% or more. 13. The mirror according to claim 11, wherein a laminated region including said second region of said glass plate, said refractive index adjusting layer and said light diffusing layer has a diffuse transmittance of 50% or more. a mirror according to any one of the preceding claims;
and an illumination unit capable of irradiating illumination light toward the second area from the one side.

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