JP2001142033A - Translucent body having reflected latent image and fashion glasses using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sunglasses which do not substantially exert an optical influence to transmitted light and can provide ornamentallity in appearance or a translucent body which is applicable to windows, etc., of buildings. SOLUTION: The sunglasses have at least >=2 layers of layer constitution and are constituted by providing the front surface of the first layer 26 with ruggedness and forming a translucent reflection film layer 27 of a thin film thereon and further a second layer 28 thereon so as to flatten the ruggedness with a material having nearly the same refractive index as the refractive index of the first layer. Such shapes as to form holograms of a reflection type together with the reflection film layer are imparted to the ruggedness to make the hologram images observable by the reflected light from outside. Such shapes as to form diffraction gratings of a reflection type, prisms, Fresnel lenses, etc., are imparted to the lenses to impart optical effects, such as the spectral splitting of the reflected light observed from outside or the reflection, convergence, etc., to specific directions, by which ornamentality is imparted to the sunglasses.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a translucent transparent structure for reducing light, such as sunglasses or window glass of a building, and particularly to a transmitted light which has no optical effect other than intensity. The present invention relates to a translucent body that imparts an optical effect to light to achieve decorativeness and other functions, and a fashion glass using the same.

[0002]

2. Description of the Related Art In sunglasses, window glasses of buildings, etc., glass or resin films which can control light transmittance or coloring by applying fine metal particles for the purpose of dimming are widely used. . Functionally, current technology is sufficient,
With regard to fashionability that appeals to sensibility, it is difficult to create a structure that affects transmitted light, and at the very least, it has been realized to the extent that the color tone of the appearance is changed. Japanese Patent Application Laid-Open Nos. 8-248361, 10-39263 and 10-39263 show examples of such orientations.
Japanese Patent Application Laid-Open No. 11-52305 exists, but the visibility is not sufficiently distorted, for example, the visibility is not sufficiently secured, or the condition that does not affect the transmitted light other than the intensity is not clear, and the visibility remains problematic. It was difficult to apply to the required application.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sunglass or a building which can give a decorative appearance without substantially affecting the transmitted light optically. An object of the present invention is to realize and provide a translucent body applicable to windows and the like.

[0004]

The translucent body according to the present invention has at least two layers, a first layer having irregularities on its surface, and a thin translucent reflective film layer thereon. Further, a second layer is formed thereon by using a material having substantially the same refractive index as the first layer so as to flatten the irregularities. This realizes a translucent body that can exert an optical effect only on reflected light without optically affecting transmitted light.

The irregularities are formed to form a reflection type hologram together with a reflection film layer so that a hologram image can be observed by reflected light from the outside, and a reflection type diffraction grating, a prism, a Fresnel lens and the like are provided. A decorative shape is imparted by giving an optical effect such as spectroscopy or reflection or convergence in a specific direction to reflected light observed from the outside by giving a shape to be formed.

As described above, according to the translucent body according to the present invention, the sum of the thicknesses of the first layer and the second layer is invariable at any place, and the two layers have almost the same refractive index, so that the transmissivity is high. There is no optical change to light. In addition, the reflected light gives an optical change due to the unevenness of the reflection film layer,
It can give a decorative effect to external observers.

In addition to providing decorativeness, the present invention is applied to a cover glass of a timepiece, an image display device, or the like, and has an optical function of reflecting external incident light in a specific direction so as to be invisible to an observer. By incorporating a grating or the like, it is possible to realize a clock, an image display device, or the like that is hardly affected by external light.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram for explaining the principle, operation, effects, and the like of the present invention, and is a perspective view showing a translucent body having a reflective latent image so that the configuration can be understood. In FIG. 1, a translucent body 10 having a reflective latent image showing the basic structure of the present invention is:
A reflective film composed of a first transparent layer 11, a reflective film layer 12, and a second transparent layer 13 and formed of a metal thin film having a thickness of about several tens of angstroms on irregularities provided on one surface of the first transparent layer 11. A layer 12 is formed, and a second transparent layer 13 is further formed thereon to flatten the irregularities.

The first transparent layer 11 and the second transparent layer 13 are made of materials having substantially the same refractive index so that the difference between them is about 0.1 or less. The sum of the paths of the first and second transparent layers 11 and 13 through which the light 14 passes is always constant, and the thickness of the reflective film layer 12 is formed sufficiently smaller than the wavelength of the visible light, so that the transmitted light 1
No. 5 has little optical effect other than a decrease in intensity. Further, since the unevenness is formed as an unevenness forming a hologram, a hologram image built in the unevenness, that is, a reflected latent image can be observed from the reflected light 16 from the reflective film layer 12 having the unevenness. .

The incident light 17 is incident light having an incident angle different from that of the incident light 14, and becomes a transmitted light 18 and a reflected light 19. If a latent image of a hologram built in as the unevenness of the reflective film layer 12 is formed so that different latent images can be observed at different angles of incident light, different hologram images can be observed with the reflected lights 16 and 19. Can be made, and further decorativeness can be given.

Even if the first transparent layer 11 is formed as a glass substrate with irregularities by etching or other methods, a transparent resin such as acrylic or polycarbonate in a flowing state is poured into a bag-shaped mold having irregularities and a flat surface. It can also be formed by polymerizing and hardening with. The reflection film layer 12 is made of, for example, Ti, Cr,
A thin film of metal such as Co, Ni, Nb or the like, a thin film of metal oxide or the like is deposited and deposited by vapor deposition, sputtering or the like to about 50 angstroms. The second transparent layer 13 is completed by applying an ultraviolet curable resin having substantially the same refractive index as that of the first transparent layer 11 on the reflective film layer 12 and irradiating ultraviolet rays while pressing a flat surface to cure the resin. . Each technique is well-known, and will not be described in detail.

In the above description, the reflective film layer 12 is a translucent layer in which metal fine particles are formed in a thin film shape to reflect a part of incident light and transmit a part thereof. A different dielectric may be formed to form the reflective film layer. However, as the purpose of the present invention, it is desired to avoid an optical effect other than the intensity on the transmitted light, so that the film thickness is formed to be sufficiently smaller than the wavelength of the visible light.

In the above description, the concavities and convexities provided on the first transparent layer 11 are described only as concavities and convexities for forming a hologram image, and the details and forming method thereof are not described. The method of formation or mass replication is also a well-known technique. In addition to holograms, it is easy to adopt a diffraction grating that causes light interference due to unevenness to reflect light in a specific direction or to reflect light in a specific direction, or to adopt a unevenness that forms a reflection-type Fresnel lens, etc., to achieve a separate effect. It is.

FIG. 2 shows a fashion glass as an embodiment using the present invention. FIG. 2 (a) is a perspective view of a fashion glass 20, and FIG. The enlarged view of the end face 23 is shown. In the figure, a fashion glass 20 includes a glass part 21 and a vine 22.
And the glass part 21 includes the first and second glass plates 2.
The third and fourth transparent layers 26 and 28 made of an ultraviolet curable resin are provided between the first and second transparent layers 4 and 25, and the reflection film layer 27 is further formed. An ultraviolet-curing resin 26 is applied to the first glass plate 24, and a master (not shown) having hologram information recorded thereon as irregularities is pressed thereon, and the irregularities of the master are transferred by irradiating ultraviolet rays. A semi-transparent reflective film layer 27 is formed by sputtering or vapor-depositing metal fine particles to about 50 angstroms, and an ultraviolet curable resin 28 is further formed thereon.
Is applied, and the second glass plate 25 is pressed to irradiate ultraviolet rays to cure the fourth layer ultraviolet curable resin 28 to complete the glass portion 22. The reflection film layer 27 having such irregularities
Since the unevenness is flattened by sandwiching the same ultraviolet curable resin 26 and 28 before and after, there is almost no difference in light refractive index, and there is no optical change in transmitted light other than intensity. On the other hand, a hologram image caused by the unevenness can be observed from the reflected light, and the decorative glass does not affect the field of view of the wearer of the present invention while giving a decorative effect to an external observer.

The effect of the present invention does not change even if the entire fashion glass is formed into a curved surface, or if the entire shape of the glasses is a concave lens or a convex lens as prescription glasses.
The type of the metal fine particles constituting the reflective film layer 27 can be selected in consideration of the color tone of the appearance, and the configuration can be the same as that of the conventional sunglasses in this regard.

[0015]

According to the present invention, the transmitted light has an optical effect other than the intensity by flattening the unevenness with a material having the same refractive index across the translucent layer of the thin film having the unevenness. A decorative property can be added by ensuring that the field of view can be ensured without reflection and that the reflected light can be observed with a built-in latent image using holograms, diffraction gratings, or the like. It is clear from the embodiment of the fashion glasses that the present invention can be used for glasses, building windows, automobile windows, and the like.

From a different point of view, the present invention can be applied to a cover glass of a watch or a cover glass of various display devices. In particular, when observing the transmitted light from the display device from the outside, such as a display device, a hologram or diffraction grating that reflects external light from the side in a harmless direction without directing the light to the observer in front is used. If it is formed, an effect more than simply providing decorativeness can be expected. These are also included in the present invention.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the principle, operation, and the like of a translucent body having a reflective latent image.

FIG. 2 is a view for explaining a structure of a fashion glass as an embodiment.

[Explanation of symbols]

10... A translucent body having a reflective latent image, 11.
.First transparent layer, 12 ... reflective film layer,
13 ... second transparent layer, 14, 17 ... incident light, 15, 18 ... transmitted light, 1
6, 19 ... reflected light 20 ... fashion glass, 21 ...
・ Glass part, 22 ・ ・ ・ vine,
23: end of glass part, 24: first glass plate, 25: second glass plate, 26
... third transparent layer, 27 ... reflective film layer, 28 ... fourth transparent layer

Claims (4)

[Claims] 1. A translucent body having at least two or more layers, wherein a surface of a first layer is provided with irregularities, a thin translucent / reflective film layer is formed thereon, and a first layer is further formed thereon. By forming the second layer so as to flatten the irregularities with a material having substantially the same refractive index, the transmitted light has no optical effect other than the intensity, and only the reflected light has an optical effect. Translucent body having a reflective latent image characterized by acting and fashion glass using the same 2. The translucent body having a reflective latent image according to claim 1 and a fashion glass using the same, wherein the translucent / reflective film layer is formed of metal fine particles or metal oxide by vapor deposition, sputtering, coating or the like. A translucent body having a reflective latent image, which is a translucent film formed of a thin film or the like with a thickness sufficiently smaller than the wavelength of visible light and reflecting part of light and transmitting part of light. And fashion glasses using it 3. A transflective body having a reflective latent image according to claim 1 and a fashion glass using the same, wherein the unevenness on the surface of the first layer is a reflection type diffraction grating together with a thin translucent / reflective film layer. , Lens surface, Fresnel lens surface, etc., and splits, reflects, scatters,
Translucent body having a reflective latent image characterized by giving an optical change such as focusing, and a fashion glass using the same 4. A semi-transparent body having a reflective latent image according to claim 1 and a fashion glass using the same, wherein the unevenness on the surface of the first layer is a reflection type hologram together with a thin translucent / reflective film layer. A translucent body having a reflective latent image formed therein and capable of externally observing an image or the like embedded in the hologram by light incident from the outside, and a fashion glass using the same.