JP2008012759A - Decorative member, lighting fixture and decorative article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outer lens, a lighting fixture for vehicles or the like which is provided with an optical multilayer film so designed that it reduces the effect of colored light produced by internal reflection and makes the light observed as a desired metallic light. <P>SOLUTION: The outer lens 13 is composed of: a light-transmitting base 13a; and the optical multilayer film 14 formed on the outer or inner surface of the light-transmitting base and reflecting part of incident light. Moreover the outer lens 13 is so constituted that it has an indented shape 15 diffusely reflecting the reflected light or transmitted light. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicular lamp such as a rear combination lamp (hereinafter referred to as R / C), a tail lamp, a stop lamp, a blinker lamp, a marker lamp, a fog lamp, and a high-mount stop lamp used in an automobile, a general illumination lamp, and a game. The present invention relates to various lamps such as lamps for equipment, decorative members used for the above-mentioned various lamps and the like, and further to decorative articles used for game machines and the like and utilizing external light.

Conventionally, such a lamp is known from Patent Document 1, for example, and is configured as shown in FIG.
That is, in FIG. 11, a lamp 1 is a vehicular lamp that emits red or orange light, is disposed so as to surround the lamp 2 as a light source, and the light from the lamp 2 is emitted. The reflecting member 3 is configured to reflect toward the front in the emission direction, and the outer lens 4 is disposed in front of the reflecting member 3.

The lamp 2 is, for example, an incandescent bulb, a halogen bulb, or the like, and emits light when supplied with power from the outside.
Further, the reflecting member 3 is formed in a concave shape forward in the light emitting direction, for example, by forming a reflective film such as an aluminum vapor deposition film on the surface of the resin base material, thereby forming a concave parabolic reflection toward the front. It is formed as a surface.

The outer lens 4 is configured as a lens or a cover by a translucent base material 4a such as glass or a resin material, and is disposed so as to cover the entire open front surface of the reflecting member 3.
Further, the outer lens 4 is colored in accordance with a desired transmitted light color, that is, red or orange.
When the transmitted light color is white light, such coloring is omitted.

The outer lens 4 includes an optical multilayer film 5.
In the illustrated case, the optical multilayer film 5 is formed on the surface of the outer lens 4, transmits the colored light colored by the outer lens 4 as it is, and transmits light such as natural light from the outside to the outer lens 4. The colored portion is reflected by a color different from the color of the colored portion, for example, blue.
The optical multilayer film 5 is composed of a plurality of laminated films so as to reflect blue as described above.
Here, the optical multilayer film 5 reflects blue light, but is not limited thereto, and may be configured to reflect, for example, green, purple, or silver. In the case of reflecting silver, it is necessary to appropriately select the colors of the lamp 2 and the outer lens as shown in Patent Document 2.

According to the vehicular lamp 1 having such a configuration, at the time of lighting, the white light Lw emitted from the lamp 2 is reflected directly or on the surface of the reflecting member 3 and irradiated forward through the outer lens 4. It has come to be.
At that time, when the white light Lw from the lamp 2 passes through the outer lens 4, the wavelength component other than the transmitted light color is absorbed by the outer lens 4, so that the transmitted light is colored red or orange. Red or orange colored light Lo is irradiated forward in the light irradiation direction.

At the time of non-lighting, as shown in FIG. 12, a part of the external light L incident from the outside is reflected by the optical multilayer film 5 and emitted as blue light Lb.
Further, another part of the incident light passes through the optical multilayer film 5 and the outer lens 4 and enters the interior, is reflected by the reflecting member 3, and then passes through the outer lens 4 and the optical multilayer film 5 again. Red or orange colored light Lo is emitted to the outside.
In this case, since the colored light Lo is emitted to the outside according to the light distribution characteristics of the reflecting member, the amount of the colored light Lo varies depending on the viewing direction when viewed from the outside, so that the appearance changes. become.

Further, for example, as shown in Patent Document 3, the reflex reflector is provided with a multilayer filter composed of a filter base provided with an optical multilayer film on the front surface of the reflective element, so that when the reflector is observed from the outside, it is made of the optical multilayer film. The reflected light is visually recognized as a metallic color, and the light incident on the inside is colored when passing through the filter base and is visually recognized as colored light.
JP 2004-103343 A JP 2004-103366 A JP 2003-337213 A

By the way, in the vehicular lamp 1 having such a configuration, the reflected light from the optical multilayer film 5 is so-called regular reflection, so that the appearance is all visually recognized as a metal color.
At that time, when the optical multilayer film 5 has reflection characteristics in all wavelength bands, it is observed as a so-called silver color, and when the optical multilayer film 5 has a relatively high reflectance in a yellow region, It will be observed as a so-called gold color.

Therefore, when the base color of the lamp surrounding area combined with the vehicle lamp 1 is a metallic color, the vehicle lamp 1 has a good appearance, but the base color is gold, silver. In the case of a non-metallic color other than the above, the color of the metallic reflected light by the optical multilayer film 5 does not necessarily match the design with the base color, and the design is adversely affected. The merchantability of the automobile as a final product may be reduced.
Therefore, it is desired to obtain a desired metallic luster (metallic feel) and increase the degree of freedom in design as an appearance of the lamp.

  Furthermore, when the light is not turned on, the incident light that has entered the lamp is emitted outside again due to internal reflection or the like, contrary to the design intention that is visually recognized as a reflection color by the optical multilayer film 5 of external light. Colored light colored by the outer lens is mixed into the reflected color. In particular, when it is designed to be visually recognized as a color having a high metallic luster when not lit (hereinafter referred to as a metal color), the effect of the metal color is weakened by mixing the colored light into the metal color. It will be.

  Even when the outer lens is not colored, for example, when the optical multilayer film reflects blue light, the blue light is incident on the outer lens through the optical multilayer film. Is reflected by the optical multilayer film, the incident light to the inside becomes yellow light, and this yellow light is reflected by the reflecting member and is emitted to the outside again through the outer lens and the optical multilayer film. Similarly, yellow light (colored) is mixed into the light reflected by the optical multilayer film.

  Further, in the case of the reflector according to Patent Document 3, similarly, the incident light to the inside is reflected by the reflecting reflector and is emitted to the outside again, so that the colored light by the internal reflection is mixed into the reflected light by the optical multilayer film, Light having a wavelength different from that of the reflected light designed by the optical multilayer film is emitted.

In view of the above, the present invention can obtain a desired metallic luster for the appearance of the lighting device at the time of lighting and non-lighting, and has a high degree of freedom in design. An object of the present invention is to provide lamps such as lighting and general lighting, decorative members used for the lamps, and decorative parts.
Furthermore, it is used for lamps, lamps, etc. for vehicular lamps, lighting for game machines, general lighting, etc., in which the influence of colored light due to internal reflection is reduced so that light close to the color reflected by the optical multilayer film can be observed. The object is to provide a decorative member and a decorative part.

  According to the first configuration of the present invention, the above object comprises a translucent substrate and an optical multilayer film that reflects a part of incident light formed on at least one surface of the translucent substrate. A decorative member, characterized in that at least part of at least one surface of the translucent substrate or the surface of the optical multilayer film is provided with an uneven shape for irregularly reflecting light. Is achieved.

  In the decorative member according to the present invention, preferably, the concave / convex shape is formed at an interval or width of 1 μm or less and is randomly arranged. It is formed on the entire surface or at least a part of the optical multilayer film.

  In the decorative member according to the present invention, preferably, the translucent substrate is made of a coloring material mixed with a pigment, a dye or the like.

  The decorative member according to the present invention preferably includes a colored film that colors transmitted light on at least one surface of the translucent substrate or on the optical multilayer film formed on the translucent substrate. Yes.

  Furthermore, the object is a lamp having a light source and a reflecting member according to the second configuration of the present invention, wherein the decorative member according to any one of claims 1 to 4 is provided on a light irradiation side of the lamp. This is achieved by a lamp characterized in that is arranged.

  Further, according to the third configuration of the present invention, the above object is achieved by a decorative article characterized in that a reflective member is arranged on one side of the decorative member according to any one of claims 1 to 4. The

  In the decorative article according to the present invention, preferably, a reflex reflector is arranged on one side of the decorative member according to any one of claims 1 to 4.

According to the first configuration, for example, when used as a decoration member of a vehicular lamp, when the light source is turned on, the light emitted from the light source is reflected directly or by the reflection member and is externally passed through the decoration member. Exit.
At this time, the light from the light source is irradiated through the optical multilayer film.
Accordingly, when observed from the outside, the transmitted light or colored light from the translucent substrate is visually recognized from the vehicular lamp.
Furthermore, the light from the light source is scattered by the uneven shape. For this reason, diffused light is irradiated.

On the other hand, when natural light or the like is incident from the outside when the light source is not turned on, a predetermined wavelength component is reflected by the optical multilayer film, and light of a predetermined color is emitted to the outside. become.
The metallic luster appearance of the reflected light of the predetermined color differs depending on the formation position of the concavo-convex shape, and the case where the optical multilayer film is disposed outside the translucent substrate will be described below.

  When the uneven shape is formed on the surface of the optical multilayer film, light of a predetermined color is irregularly reflected when observed from the outside. For this reason, unlike the metal color by the conventional regular reflection, the diffuse reflection component is enhanced, and a color with a low metallic gloss (hereinafter referred to as a non-metallic color) is visually recognized.

  When the concavo-convex shape is formed on the inner side of the translucent substrate, the metal color specular reflection light from the optical multilayer film can be observed.

When the concavo-convex shape is formed on the outer side of the translucent substrate, the non-metallic color reflected light is more than the metallic color appearance of the regular reflection light when the concavo-convex shape is formed on the inner side of the translucent substrate. Can be observed. When the uneven shape is formed on the surface of the optical multilayer film when the uneven shape is formed on the outer side of the translucent substrate, a part of the light incident on the surface of the optical multilayer film from the outside is part of the uneven surface. It will be irregularly reflected by the shape and is visually recognized as a non-metallic color.
Thus, a desired metallic luster appearance can be obtained by forming the concavo-convex shape.

  Further, of the incident light from the outside, when the light that has passed through the optical multilayer film and entered the inside is reflected by the reflecting member, and again passes through the optical multilayer film and is emitted to the outside, this internally reflected light is Scattering is caused by the uneven shape. As a result, the ratio of the internally reflected light to the reflected light by the optical multilayer film is significantly reduced.

  Therefore, even when the transmitted light of the outer lens becomes colored light, the influence of the colored light is greatly reduced, and the colored light is less likely to be emitted, so that the light of the predetermined color can be surely visually recognized. Become. That is, the mixing of colored light during non-lighting can be reduced as compared with a conventional lamp using an outer lens without an uneven shape. In addition, even when a metal color is obtained by the optical multilayer film, the reflected light of the metal color can be favorably visually recognized without being weakened by the mixing of colored light.

  The colored light is generated as light having a wavelength other than the predetermined wavelength reflected by the optical multilayer film not only when the translucent substrate is colored but also when the translucent substrate is colorless and transparent. To do.

  When the uneven shape is formed with an interval or width of 1 μm or less and arranged at random, the reflected light of the light from the outside is observed as a non-metallic color due to scattering by the uneven shape, and colored by internal reflection There is little influence of light, and a clear feeling can be obtained in the appearance of the outer lens.

  When the uneven shape is formed in a size of about 1 μm to several tens of millimeters, when the reflected light of the light from the outside is randomly arranged, the reflected light of the light from the outside It is observed as a non-metallic color due to scattering by the shape, the influence of colored light due to internal reflection is small, and the appearance of the outer lens can be visually recognized as whitish.

When the translucent substrate is composed of a coloring material mixed with a pigment, a dye, or the like, and further includes a colored film that colors transmitted light, and the colored film is at least one of the translucent substrates. Or the surface of the optical multilayer film formed on the translucent substrate, the transmitted light of the translucent substrate is colored by the coloring material or the colored film. Become.
Accordingly, since this colored light is scattered by the uneven shape, the light from the light source is irradiated in a wider angular range. In addition, since the colored light due to the incoming light from the outside is diffused, the color mixing ratio with respect to the color of the reflected light by the optical multilayer film is greatly reduced, and the influence of the colored light can be reduced.

  Thus, according to the decorative member according to the present invention, when the light source is not turned on, the reflected light from the optical multilayer film of the decorative member is scattered by the uneven shape, and can be observed as a non-metallic color. Moreover, when the transmitted light or colored light due to internal reflection is scattered by the uneven shape, the ratio of the transmitted light or colored light to the optical multilayer film is greatly reduced when observed from the outside. The influence is eliminated, and the reflected light from the optical multilayer film can be visually recognized more reliably.

According to said 2nd structure, when using a lamp as a vehicle lamp, for example, the light which reflected the light from the light source toward the light irradiation direction front with the reflection member is scattered by uneven | corrugated shape, and is ahead. The light that is irradiated and incident from the outside is reflected by a predetermined wavelength component at the optical multilayer film, so that light of a predetermined color is emitted to the outside.
Here, when this optical multilayer film is arranged on the inner side of the concavo-convex shape, light of a predetermined color is irregularly reflected from the outer lens when observed from the outside. A non-metallic color different from the metallic color will be visually recognized.

In addition, when incident light from the outside that has entered the inside through the optical multilayer film is reflected by the reflecting member, passes through the optical multilayer film again, and exits to the outside in the same manner. Scattering is caused by the uneven shape. As a result, the ratio of the incoming light to the reflected light by the optical multilayer film is significantly reduced.
Therefore, when the transmitted light of the translucent substrate is colored light, the influence of the colored light is greatly reduced, and the light of the predetermined color, that is, the non-metallic color can be surely visually recognized. .

  Furthermore, according to the third configuration, when the ornament is attached to, for example, a gaming machine or the like, the light incident from the outside reflects the predetermined wavelength component at the optical multilayer film, The light of a predetermined color is emitted to the outside.

Here, in a decorative article in which the optical multilayer film is arranged on the inner side of the concave / convex shape (decorative article using a decorative member having a concave / convex shape in the optical multilayer film), it diffuses by the concave / convex shape when observed from the outside. The reflected light of the predetermined color is observed from the outside. For this reason, a non-metallic color different from the metallic color of the regular reflection light by the optical multilayer film in which the conventional uneven shape is not formed is visually recognized.
In addition, in a decorative article in which this optical multilayer film is disposed outside the concave-convex shape (decorative article using a decorative member having a concave-convex shape inside the translucent substrate), the metal color is regularly reflected by the optical multilayer film. In addition to being able to observe light, colored light that has passed through the optical multilayer film out of incident light from the outside is reflected inside and scattered again by the irregular shape when it passes through the decorative member and exits to the outside. It becomes difficult to be emitted and colored light is greatly reduced. Therefore, it is possible to obtain emitted light of a predetermined color as designed by the optical multilayer film.

Therefore, when the transmitted light of the translucent substrate is colored light, the influence of the colored light is greatly reduced, and the light of the predetermined color, that is, the non-metallic color can be surely visually recognized. .
In this way, it is possible to provide a decorative article that can be observed as reflected light having a desired metallic luster and further reduces the influence of colored light due to internal reflection.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS.
The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. As long as there is no description of the effect, it is not restricted to these aspects.

[Example 1]
FIG. 1 shows the configuration of a first embodiment of a vehicular lamp provided with an outer lens according to the present invention.
In FIG. 1, a vehicular lamp 10 is a vehicular lamp that emits colored light, and is disposed so as to surround a lamp 11 as a light source and the lamp 11, and light from the lamp 11 is forward in the light irradiation direction. And the outer lens 13 disposed in front of the reflecting member 12 in the optical axis direction.

  The lamp 11 is, for example, an incandescent bulb, a halogen bulb, an LED lamp, or the like, and emits light when supplied with power from the outside.

For example, the reflecting member 12 is formed in a concave shape toward the front in the light irradiation direction, for example, by forming a reflective film such as an aluminum vapor deposition film on the surface of the resin base material. It is configured as a reflective surface. The reflecting member is formed with a reflecting surface in the light irradiation direction of the lamp, and reflects a part of light from the light source and light from the outside incident through the outer lens.
Here, the reflecting surface of the paraboloidal system includes not only a rotating paraboloid but also a free-form surface based on a paraboloid.

Further, the outer lens 13 is configured as a lens or a cover by a translucent substrate 13a such as glass or a resin material, and in the illustrated case, the outer lens 13 is arranged so as to cover the entire open front surface of the reflecting member 12. .
Further, the outer lens 13 is mixed and dispersed with a light-transmitting substrate so that the light-transmitting substrate 13a can transmit a desired transmitted light color, that is, red or orange light, for example. By coloring, it is colored.
When a light source that emits a desired color is used, such as by using an LED as a light source, such coloring is omitted, and a transparent substrate is used that is colorless and transparent.

Further, the outer lens 13 includes an optical multilayer film 14.
As shown in FIG. 2, the optical multilayer film 14 is formed on the translucent substrate 13a on the surface (front surface) of the outer lens 13, and transmits the colored light colored by the translucent substrate 13a as it is. . Further, light such as natural light from the outside is reflected by a color different from the coloring of the translucent substrate 13a, for example, blue.
Here, the optical multilayer film 14 is composed of a so-called multilayer film formed by laminating a plurality of layers.
The optical multilayer film 14 reflects blue light, but is not limited thereto, and may be configured to reflect light of, for example, green, yellow, and silver.

Further, as shown in FIG. 2, the outer lens 13 has an uneven shape 15 on the entire front surface of the translucent substrate 13a. Each convex or concave portion of the irregular shape 15 has an arbitrary shape such as a triangular shape, a rectangular shape, or a round shape.
Further, the uneven shape 15 may scatter incident light from the outside, and the size and arrangement thereof are arbitrary. The uneven shape 15 may be visible such as a lens cut, or may be fine unevenness, and is regular. Even if arrange | positioned, you may arrange | position at random. Here, the size of the concavo-convex shape refers to the interval between the concavo-convex portions (for example, the interval between the convex portion and the convex portion) when indicating a regular arrangement, and the concave or convex shape when indicating a random arrangement. The width of the part is the diameter of a circle, the length of one side of a square.
However, when the size of the concavo-convex shape is 1 μm or less, it is necessary to avoid interference with external light so that the characteristics are not emphasized with respect to a specific wavelength. Therefore, when the interval or width of the concavo-convex shape is 1 μm or less, preferably, the concavo-convex shape is randomly selected or randomly arranged. More preferably, the spacing or width and the arrangement are randomly configured.

As a result, the uneven shape 15 affects the surface of the optical multilayer film 14 when the optical multilayer film 14 is formed thereon. An uneven shape will appear.
As a result, light incident on the optical multilayer film 14 from the outside is not regularly reflected by the optical multilayer film 14 but diffusely reflected.
The uneven shape 15 formed on the translucent substrate 13a of the outer lens 13 affects the surface of the optical multilayer film 14, and the uneven shape appears on the surface of the optical multilayer film 14. The surface of 14 may be smoothed and formed flat.

The vehicular lamp 10 according to the embodiment of the present invention is configured as described above, and the white light Lw is emitted from the light emitting portion of the lamp 11 as shown in FIG. The light is emitted, reflected by the reflecting member 12, becomes substantially parallel light, and is irradiated forward in the light irradiation direction through the outer lens 13 and the optical multilayer film 14.
In this case, when the white light Lw from the lamp 11 passes through the outer lens 13, it is colored, for example, red or orange by the outer lens 13 and passes through the optical multilayer film 14, and the colored light Lo is Irradiated forward in the light irradiation direction.
In this case, the light Lw from the lamp 11 is scattered by the concavo-convex shape 15, so that the amount of far irradiation light at the time of lighting tends to be slightly reduced.

Further, when the lamp 11 is not turned on, as shown in FIG. 3, when external light L such as natural light is incident on the optical multilayer film 14 from the outside, the incident light is reflected by the optical multilayer film 14, and at that time, blue light is reflected. The light is emitted as Lb.
Here, based on the uneven shape 15 on the surface of the optical multilayer film 14, incident light is irregularly reflected without regular reflection, so that it does not become a metallic color but is reflected as a nonmetallic color.
Thereby, when not lit, the blue light Lb is irregularly reflected from the optical multilayer film 14 on the surface of the outer lens 13 when observed from the outside. For this reason, a non-metallic color different from the metallic color by the conventional regular reflection is visually recognized.

Further, of the incident light from the outside, the incoming light Li that has passed through the optical multilayer film 14 and the outer lens 13 and entered the interior is reflected by the reflecting member 12 and again passes through the outer lens 13 and the optical multilayer film 14. And exits to the outside.
At this time, the light by such internal reflection is colored by the outer lens 13 to become colored light Lo. Further, part of the uneven shape 15 is diffusely reflected inward, and the other part is diffused and emitted to the outside.
Therefore, the ratio of the internally reflected light Li to the reflected light Lb by the optical multilayer film 14 is significantly reduced. For this reason, for example, the influence of the colored light Lo transmitted through the outer lens 13 is greatly reduced, and the above-described non-metallic blue light Lb can be surely visually recognized.

Here, the concavo-convex shape 15 described above varies in scattering effect as follows according to the size and density of each concavo-convex (total area ratio of the recesses) and the occupied area ratio with respect to the diameter of the outer lens 13. .
When the density is 80%, the reflected light from the optical multilayer film 14 is visually recognized as a non-metallic color when the size is 1 μm or less. Further, the influence of the internal reflection light is small, and the clearness of the outer lens 13 is obtained. If the size is 1 μm or more, it is similarly visually recognized as a non-metallic color and is less affected by the internally reflected light, but the clear feeling is reduced and the whole is observed whitish.
When the size is 0.3 μm, when the density is 50% or more, the reflected light from the optical multilayer film 14 is visually recognized as a non-metallic color, and the influence of the internal reflected light is small, but the clear feeling is reduced and the whole is observed as whitish. Will be. On the other hand, when the density is 50% or less, the reflected light from the optical multilayer film 14 is visually recognized as a non-metallic color + a metallic color, and the influence of the internal reflected light is relatively large, but a clear feeling of the outer lens 13 is obtained. Therefore, the amount of light emitted from the distance at the time of lighting is relatively large.

Further, as shown in FIGS. 4A to 4E, the optical multilayer film 14 is formed as an optical multilayer film of silver (red + green + blue) reflection, yellow (red + green) reflection, blue reflection, and green reflection, respectively. When configured, the reflection color of the conventional optical multilayer film 14 is silver, gold, metallic green, and metallic blue, but by providing the concave and convex shape 15, the reflected colors are white and yellow, respectively. , Non-metallic green and non-metallic blue.
The table shown in FIG. 4 shows an example of the configuration of the optical multilayer film. In these configurations, TiO _{2 is} used as a high refractive index material, and a plurality of SiO ₂ layers are alternately stacked as a low refractive index material. Yes.

The materials are not limited to these, and as high refractive index materials, Nb ₂ O ₅ , Ta ₂ O ₅ , Si, a-Si, Poly-Si, La ₂ O ₅ , ZrO _2, etc. Al ₂ O ₃ , MgF _{2 and the} like can also be used.
FIG. 4E shows the reflectance characteristics of the optical multilayer film 14 corresponding to FIG. It can be confirmed that the higher the density of the concavo-convex shape, the lower the specular reflection component, and the higher the scattering effect. In addition, the result of the reflectance characteristic shown to FIG. 4 (A)-(E) used what formed the optical multilayer film on the transparent base | substrate. Further, in the sample obtained as a result of FIG. 4E, the concave and convex shape is randomly arranged with circular concave portions having a diameter of 20 μm ± 10 μm by dry etching on the surface of the optical multilayer film (surface not in contact with the transparent substrate). Formed. For any sample, the light of the halogen lamp was irradiated from the optical multilayer film side in the direction perpendicular to the optical multilayer film at an incident angle of 30 degrees, and among the reflected lights, the light with a reflection angle of 30 degrees was detected to obtain the result. It was.

  In this way, when the size of each concave or convex portion of the concavo-convex shape 15 is 1 μm or more (up to several tens of mm) and the density is 50% or more, the transparency of the outer lens 13 and the optical multilayer film 14 is high. It will decrease and be observed whitish. On the other hand, when the size is 1 μm or less, the transparency of the outer lens 13 and the optical multilayer film 14 is increased, and a clear feeling is obtained.

Therefore, the density is preferably 50% or less in order to increase the amount of far-irradiated light at the time of lighting, and the higher the density is better in order to increase the non-metallic color at the time of non-lighting.
In particular, in the case of automobile turn lamps, stop lamps, general lighting fixtures for illuminating products, etc., if the density is too high, the amount of irradiation light may decrease, resulting in insufficient performance. It is necessary to select a density of 15 as appropriate, or to increase the light quantity of the light source.
On the other hand, in the case of a tail lamp, since the irradiation distance may be short, the density can be increased.

In the vehicle lamp 10 described above, the uneven shape 15 is formed on the front surface of the outer lens 13, but the present invention is not limited to this, and the uneven shape 15 may be formed on the surface of the optical multilayer film 14 as shown in FIG. 5. Good.
Moreover, in the vehicle lamp 10 mentioned above, although the uneven | corrugated shape 15 is formed over the whole front surface of the outer lens 13, it is not restricted to this, As shown in FIG. It may be formed.
In this case, only in this partial region, the non-metallic color is visually recognized when not turned on, and the influence of the colored light due to the internally reflected light can be reduced.

[Example 2]
FIG. 6 shows a configuration of a second embodiment of a vehicle lamp provided with an outer lens according to the present invention.
In FIG. 6, the vehicular lamp 20 has the same configuration as the vehicular lamp 10 shown in FIG. 1, and thus the same components are denoted by the same reference numerals and description thereof is omitted.
Compared with the vehicular lamp 10 shown in FIG. 1, the vehicular lamp 20 has, instead of the lamp 11 and the concavo-convex shape 15, as shown in FIG. The structure is different only in that it has a concavo-convex shape 22 provided in part.

According to the vehicular lamp 20 having such a configuration, when the LED 21 is supplied with electricity from the outside and emits light, the light L1 is emitted from the LED 21 and reflected directly or by the reflecting member 12 as shown in FIG. Thus, the light becomes substantially parallel light and is irradiated forward in the light irradiation direction through the outer lens 13 and the optical multilayer film 14.
In this case, when the light L1 from the LED 21 passes through the outer lens 13, it is colored, for example, red or orange by the outer lens 13, and the colored light Lo passes through the optical multilayer film 14 and is irradiated with light. Irradiated forward in the direction.
In this case, the light L1 from the LED 21 is scattered by the concavo-convex shape 22, so that the amount of far-irradiated light at the time of lighting tends to be slightly reduced.

Further, when the LED 21 is not lit, as shown in FIG. 8, when external light L such as natural light is incident on the optical multilayer film 14 from the outside, the incident light L is regularly reflected by the optical multilayer film 14, and the metal It will be emitted as colored blue light Lb.
As a result, when not lit, blue light is regularly reflected from the optical multilayer film 14 on the surface of the outer lens 13 when observed from the outside, so that the metallic blue light Lb is visually recognized. .

Further, of the incident light from the outside, the incoming light Li that has passed through the optical multilayer film 14 and the outer lens 13 and entered the interior is reflected by the reflecting member 12 and again passes through the outer lens 13 and the optical multilayer film 14. And exits to the outside.
At this time, the light Li caused by such internal reflection is colored by the outer lens 13, and part of the colored light Lo is diffusely reflected inward by the uneven shape 22, and the other part is diffused and emitted to the outside. Will do.
Therefore, the ratio of the internally reflected light Lo to the reflected light Lb by the optical multilayer film 14 is significantly reduced. For this reason, for example, the influence of the colored light Lo transmitted through the outer lens 13 is greatly reduced, and the above-described metallic blue light Lb can be reliably recognized.

Here, the concavo-convex shape 22 described above varies in the scattering effect as follows according to the size and density of the individual concavo-convex portions (the total area ratio of the concave portions) and the occupied area ratio with respect to the diameter of the outer lens 13. .
The size of the concavo-convex shape refers to the interval between the concavo-convex portions (for example, the interval between the convex portions and the convex portion) when indicating a regular arrangement, and when the concavo-convex portions are circular when indicating a random arrangement. If it is a diameter or square shape, it means the length of one side.
When the size is 5 mm, when the density is 30%, the reflected light from the optical multilayer film 14 is visually recognized as a metallic color, the internal reflected light is large, the clearness of the outer lens 13 is obtained, and the amount of distant irradiation light at the time of lighting There were many. Further, when the density was 80%, it was also visually recognized as a metallic color, the internal reflection light was small, the clear feeling was reduced, and the whole was observed as whitish, and the amount of far irradiation light at the time of lighting was reduced.
Also, when the size is 0.5 mm, when the density is 30%, the reflected light from the optical multilayer film 14 is visually recognized as a metallic color, and there is a lot of internal reflected light, but a clear feeling is obtained, and the amount of far irradiation light at the time of lighting There were many. On the other hand, when the density was 80%, the reflected light from the optical multilayer film 14 was visually recognized as a metal color, the internal reflected light was small, and the whole was observed as whitish, and the amount of far irradiation light at the time of lighting was small.

Here, since the uneven shape 22 only has to scatter internal incident light, the size may be visually observable like a lens cut, and the size or / and arrangement thereof are regular or random. But you can.
However, when the size is 1 μm or less, since it is close to the visible light wavelength, in order to obtain a clear feeling, the individual convex portions or concave portions of the concave-convex shape 22 are not emphasized with respect to a specific wavelength. It is necessary to avoid interference with external light. For this reason, when the space | interval or width | variety of uneven | corrugated shape is 1 micrometer or less, Preferably selection or arrangement | positioning of the space | interval or width | variety is selected at random.

  Moreover, it is preferable that the size of the unevenness requires an optical film thickness of a quarter wavelength or more. This is because in the case where the uneven shape has an optical film thickness smaller than a quarter wavelength, visible light is transmitted and diffused light cannot be obtained. Therefore, since the lower limit of visible light wavelength is 380 nm and the refractive index of the translucent substrate is about 1.52 to 1.6 (the refractive index of polycarbonate is 1.52), the size of the unevenness is formed to be 55 nm or more. It is preferable to do.

Further, the density is preferably 50% or less in order to increase the amount of far irradiation light at the time of lighting, and the higher density is preferable in order to increase the non-metallic color at the time of non-lighting.
In particular, in the case of automobile turn lamps, stop lamps, general illumination lamps for illuminating products, etc., if the density is too high, there is a risk that the amount of irradiated light will decrease and the performance will be insufficient. For this reason, it is necessary to appropriately select the density of the uneven shape 15 or to increase the light amount of the light source.

  The concavo-convex shape is formed by an appropriate method such as dry etching, sand blasting or molding depending on the shape, size, and member to be formed. A thin film containing particles can also be formed by coating or the like. When the unevenness is 55 nm to 10 μm, it is preferable to use dry etching, and when it is 10 μm to several tens of mm, it is preferable to form by dry etching, sand blasting or molding, particularly 100 μm or more. In some cases, molding is preferred.

In the vehicle lamp 20 described above, the concavo-convex shape 22 is formed on the rear surface of the outer lens 13 (translucent base 13a). However, the present invention is not limited to this, and as shown in FIG. 9, the translucent base 13a. It may be formed on the front surface of. In FIG. 9A, the uneven shape 23 formed on the translucent substrate 13 a of the outer lens 13 affects the surface of the optical multilayer film 14, and the uneven shape 24 is also formed on the surface of the optical multilayer film 14. However, the surface of the optical multilayer film 14 may be smoothed and formed flat as shown in FIG.
Moreover, in the vehicle lamp 20 described above, the concave and convex shape 22 is formed in a partial region of the rear surface of the outer lens 13, but not limited thereto, it may be formed over the entire surface of the outer lens 13. Good.

In the first and second embodiments described above, the decorative member and the lamp using the decorative member of the present invention have been described as a specific example of an outer lens for a vehicle lamp and a vehicle lamp, but the present invention is limited to a vehicle. However, it can be used as a general lighting, a lamp for a game machine, and a decorative member thereof.
Further, in the vehicle lamp in the first and second embodiments described above, the decorative member is configured as an outer lens, but may be configured as an inner lens or may be provided with a separate outer lens.

[Example 3]
In FIG. 10, while showing the structure of embodiment of the ornament 30 used for a signboard, a game machine, etc. by this invention, the structure of embodiment of the decoration member 34 used for it is shown.
A decorative member 34 made of a translucent base 31 on which an optical multilayer film 32 having a concavo-convex shape 33 is formed is provided on a support 35 serving as a main body of a signboard or a game machine. On the support 35, a reflecting member 36 formed by aluminum vapor deposition or the like is provided at a portion irradiated with light from the outside through the decorative member 34. As the reflecting member, not only a reflecting plate but also a reflex reflector is used, and a desired decorative effect can be obtained. In addition, even if it does not use a reflecting member, it can comprise as a decorative article which has the desired metallic luster appearance by providing the decoration member 34 in the support body 35. FIG. The translucent substrate 31 is made of, for example, a resin such as polycarbonate, glass, or the like, and may be flat or curved as shown in FIG.

  The light incident on the optical multilayer film 32 from the outside with respect to the decorative article 30 of the present embodiment reflects light having a predetermined wavelength designed by the optical multilayer film 32, but the surface of the optical multilayer film 32 is uneven. Since the shape is formed, it is irregularly reflected. Therefore, it is visually recognized as a nonmetallic appearance.

  Further, of light incident on the optical multilayer film 32 from outside, light (colored light) having a wavelength other than the reflection wavelength of the optical multilayer film 32 is transmitted and then reflected by the reflecting member 36. When the light is transmitted and emitted to the outside, a part thereof is irregularly reflected inward by the uneven shape 33 and a part is diffused and emitted to the outside. Therefore, the influence of the colored light in the light emitted from the decorative article 30 (or the decorative member 34) can be extremely small, and the light having a predetermined wavelength by the optical multilayer film 32 is visually recognized.

  The shape, size, arrangement, density and the like of the uneven shape are arbitrarily selected according to a desired decoration effect. Here, the size of the concavo-convex shape indicates the interval of the concavo-convex (for example, the interval between the convex portion and the convex portion) when indicating a regular arrangement, and the size of the concave or convex portion when indicating a random arrangement. The width is the diameter of a circle and the length of one side of a rectangle. A fine one of several micrometers by roughening treatment or a large one of several tens of millimeters such as lens cut or prism formation may be arbitrarily selected. However, in the case where the concavo-convex shape has an optical film thickness smaller than a quarter wavelength, from the viewpoint of transmitting visible light, the size of the concavo-convex is an optical film having a wavelength equal to or greater than a quarter wavelength of the visible light lower limit wavelength. It is preferable to form the film with a thickness of about 55 nm or more to ensure the thickness. In addition, when the interval or width of the uneven shape is 1 μm or less, it is necessary to avoid interference with external light so that the characteristics are not emphasized for a specific wavelength. Are randomly selected or randomly arranged.

In the decorative article of the present embodiment, the optical multilayer film 32 is provided on the outer side of the translucent substrate 31, but may be provided on the inner side or on both sides. The uneven shape is formed on the surface of the optical multilayer film, but may be provided on at least one surface of the translucent substrate. In this embodiment, since the unevenness is formed on the optical multilayer film provided on the translucent substrate, it is visually recognized as non-metallic appearance. For example, the optical multilayer film is provided on the translucent substrate. When the optical multilayer film is provided inside the translucent substrate, it is visually recognized as a metallic appearance.
That is, since the metallic glossy appearance of the reflected light by the optical multilayer film can be changed depending on the position where the uneven shape is provided and the position where the optical multilayer film is provided, a desired metallic glossy appearance (look) can be obtained, It is possible to increase the degree of freedom in the design of a decorative product and a product using the decorative product.

  Regardless of the position where the optical multilayer film is formed or the position where the concavo-convex shape is formed, the internal incident light having a wavelength other than the reflection wavelength of the optical multilayer film is internally reflected, and the amount of light emitted from the decorative article is It can be reduced by diffuse reflection. Therefore, light having a wavelength closer to the designed reflection wavelength of the optical multilayer film can be visually recognized.

Although not shown in the above-described embodiments, the decorative member in the present invention may include a colored film, a protective film, and the like.
In the first and second embodiments described above, the outer lens (decorative member) of the vehicular lamps 10 and 20 is colored in order to color the transmitted light. However, the present invention is not limited to this. A colored film may be provided. The same applies to the decorative member 34 in the third embodiment.
Here, the colored film can be provided on the front surface or / and the rear surface of the translucent substrate constituting the decorative member, or on the front surface of the optical multilayer film.
In the case where a colored film is provided on the front surface of the optical multilayer film 14, if the film thickness is large, cracks may occur in the colored film itself. Therefore, it is desirable that the colored film has a thickness of 20 μm or less.

In the above-described embodiment, the optical multilayer film 14 is provided on the front surface of the decorative member (front surface of the translucent substrate). However, the present invention is not limited thereto, and the optical multilayer film 14 is provided on the rear surface or both surfaces of the translucent substrate. May be provided.
In this case, the uneven shape is arranged on the light source side of the optical multilayer film, so that the internally reflected light is scattered by the uneven shape, and the influence of the internally reflected light on the reflected light by the optical multilayer film 14 on the surface can be reduced. It becomes.
In addition, by arranging the uneven shape on the opposite side (front side) of the light source of the optical multilayer film, external light is scattered by the uneven shape, and non-metallic color reflected light can be observed.

In the embodiment described above, it has been shown that the metallic gloss can be controlled by the shape, size, and density of the concavo-convex shape. The glossiness can be controlled.
For example, in a lamp in which an optical multilayer film is formed on the rear surface (light source side surface) of the translucent substrate, the surface on which the concavo-convex shape is formed is (1) the surface of the optical multilayer film on the light source side is in contact with the translucent substrate. (2) Only the surface where the optical multilayer film and the translucent substrate are in contact with each other, and (3) Only the surface on the light source side of the optical multilayer film, the appearance of the lighting device when not lit is (1), It is nonmetallic in the order of (2) and (3).

  In the above-described embodiment, the vehicular lamp 10 is simply described as a lamp. However, the present invention is not limited to this, and other types of vehicular lamps, for example, auxiliary headlamps such as fog lamps, and ornaments for game machines and the like It is also possible to configure as lighting or general lighting.

In this way, according to the present invention, it is possible to achieve a very excellent lamp that achieves a desired metallic gloss with respect to the appearance of the lamp when lit and when not lit, and a desired metallic gloss. A decorative member may be provided.
Furthermore, it is possible to provide an extremely excellent decorative member, lamp, and decorative article that reduce the influence of colored light due to internal reflection and achieve a desired reflected color.
That is, it is possible to provide a decorative member capable of increasing the degree of freedom in designing a product such as a lamp provided with a decorative member using an optical multilayer film and obtaining light having a wavelength close to the reflection wavelength designed by the optical multilayer film. .

It is a schematic sectional drawing which shows the structure of 1st embodiment of the vehicle lamp by this invention. It is a partial expanded sectional view which shows the outer lens and optical multilayer film in the vehicle lamp of FIG. It is a schematic sectional drawing which shows the reflection state of the external light at the time of the non-lighting in the vehicle lamp of FIG. It is a figure which shows the structure and reflectance characteristic in five structural examples of the optical multilayer film in the vehicle lamp of FIG. FIG. 3 is a partially enlarged cross-sectional view similar to FIG. 2, illustrating an arrangement with different uneven shapes in the vehicle lamp of FIG. 1. It is a schematic sectional drawing which shows the structure of 2nd embodiment of the vehicle lamp by this invention. It is the (A) partial expanded sectional view and (B) schematic perspective view which show the outer lens and optical multilayer film in the vehicle lamp of FIG. It is a schematic sectional drawing which shows the reflective state of the external light at the time of the non-lighting in the vehicle lamp of FIG. FIG. 3 is a partially enlarged cross-sectional view similar to FIG. 2, illustrating an arrangement with different uneven shapes in the vehicle lamp of FIG. 1. It is a schematic sectional drawing which shows the structure of 3rd embodiment of the vehicle lamp by this invention. It is a schematic sectional drawing which shows the structure of an example of the conventional vehicle lamp. It is a schematic sectional drawing which shows the reflection state of the external light at the time of the non-lighting in the vehicle lamp of FIG.

Explanation of symbols

10, 20 Vehicle lamp 11 Lamp (light source)
DESCRIPTION OF SYMBOLS 12 Reflective member 13 Outer lens 13a Translucent base material 14 Optical multilayer film 15, 22 Uneven shape 21 LED

Claims (7)

A translucent substrate;
An optical multilayer film that reflects a part of incident light formed on at least one surface of the translucent substrate, and a decorative member,
A decorative member, wherein at least one part of at least one surface of the translucent substrate or the surface of the optical multilayer film is provided with an uneven shape for irregularly reflecting light.   The decorative member according to claim 1, wherein the uneven shape is formed at an interval or a width of 1 μm or less and is randomly arranged.   The decorative member according to claim 1, wherein the translucent substrate is made of a coloring material mixed with a pigment, a dye, or the like.   2. A colored film for coloring transmitted light is provided on at least one surface of the translucent substrate or on the optical multilayer film formed on the translucent substrate. 4. The decorative member according to any one of 3 to 4. A lamp having a light source and a reflective member,
A lamp characterized in that the decorative member according to any one of claims 1 to 4 is disposed on a light irradiation side of the lamp.   A decorative article, wherein a reflective member is arranged on one side of the decorative member according to claim 1.   An ornamental product, wherein a reflex reflector is arranged on one side of the ornamental member according to any one of claims 1 to 4.

Images