JPH0518312U - Base material for jewelry - Google Patents

Abstract

(57) [Summary] [Object] To provide a base material for an accessory in which a multilayer coat film having different shades on the front and back sides is formed according to the shape of a curved surface. A transparent glass body 1 having a flat transparent surface 2 and a reflecting surface 3 located on the opposite side of the transparent surface 2 and having different angles with respect to the transparent surface 2 has a specific wavelength of light. A multi-layer coat film 4 that selectively reflects only is formed. When this accessory base material is viewed from the transparent surface 2 side, a portion with a small inclination angle to the transparent surface 2 looks like a specific color due to the selective reflection light, and a portion with a large angle looks bright white due to total reflection. On the other hand, when this is viewed from the reflecting surface 3 side, different tones of brightness appear depending on the brightness of the background.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a base material used for accessories such as earrings and broaches.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, as a base material for jewelry, a glass body coated with a colored filter glass or glass enamel is known. Further, as shown in FIGS. 3 and 4, it is known that a multi-layer coating film 14 is formed on a flat surface 12 of a hemispherical glass body 11. 3 and 4 are optical principle diagrams of a base material for jewelry, in which representative strong light is represented by a thick solid line, white light is represented by a thin solid line, and selectively reflected light is represented by a dashed line. The translucent light is represented by broken lines. The multi-layer coat film 14 has a property of selectively reflecting only light having a specific wavelength of incident light and transmitting the other. Therefore, when the multi-layer coat film 14 is formed, the hue of the glass body changes depending on the viewing angle due to the relation of reflection and refraction of light. That is, when the glass body 11 is viewed from the plane 12 side, as shown in FIG. 3, the incident light A 3, B 3, C 3, D 3 is reflected by the multilayer coating film 14 as reflected light a 3, b 3, c 3, d 3 of a specific wavelength. Therefore, only the reflected light of a specific color can be seen. Further, when the glass body 11 is viewed from the curved surface 13 side, as shown in FIG. 4, the incident light A4, B4, C4, D4 becomes the reflected light a4, b4, c4, d4 of a specific wavelength by the multilayer coating film 13. As a result, although there is a slight difference in density between the center and the surroundings due to the lens effect, the whole looks like a specific color as in the previous case.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional base material for accessory, since the multilayer coating film 13 is formed on the flat surface 11, light is selectively reflected uniformly, and both the front and back have the same color and do not change, which is not good. There is a drawback. Therefore, an object of the present invention is to provide a base material for an accessory that exhibits different shades depending on the shape of a curved surface.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, in the present invention, a transparent or semi-transparent surface having a flat transparent surface 2 and a reflecting surface 3 located on the opposite side of the transparent surface 2 and having a partially different angle with respect to the transparent surface 2 is provided. On the reflecting surface 3 of a substrate such as the glass body 1, a multi-layer coating film 4 that selectively reflects only light of a specific wavelength is formed.

[0005]

[Action]

 When the base material for accessory of the present invention is viewed from the transparent surface 2 side, incident light is selectively reflected by the multilayer coat film 4 at the portion of the reflective surface 3 having a small inclination angle with respect to the transparent surface 2. On the other hand, in the portion of the reflecting surface 3 having a large inclination angle with respect to the transmitting surface 2, since the incident angle is larger than the field angle, the selective reflection by the multilayer coating film 4 does not occur, and all the incident light is reflected. Will be. Therefore, the glass body 1 looks like a specific color due to the selectively reflected light at a portion where the inclination angle with respect to the transmission surface 2 is small, and looks bright white due to total reflection at a portion where the angle is large. On the other hand, when the glass body 1 is viewed from the reflection surface 3 (multilayer coating surface) side, the incident light is selectively reflected by the multilayer coating film 4 and the entire surface looks like a specific color (for example, blue), but the light from behind is Since the light is selectively transmitted in the part where the inclination angle is small, the brightness of different tones appears depending on the brightness of the background.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 and 2 are optical principle diagrams of a base material for jewelry, in which representative strong light is represented by a thick solid line, white light is represented by a thin solid line, and selectively reflected light is represented by a dashed line. The translucent light is represented by broken lines. Reference numeral 1 is a hemispherical transparent glass body having a flat transmitting surface 2 and a curved reflecting surface 3. A multilayer coat film 4 is formed on the curved surface 3. This multilayer coat film 4 has a property of selectively reflecting only light of a specific wavelength.

For example, in order to form the multilayer coat film 4, first, TiO is vapor-deposited at an oxygen partial pressure of 7 to 10 × 10 −5 [Torr] to form a TiO 4 layer of 300 to 370 [Å]. Next, MgF2 having a thickness of 750 [angstroms] is vapor-deposited on the TiO2 layer while the deposition target is kept at 200 [deg.] C. or higher. Then, this process is repeated to form a coat having 6 to 20 layers. The multilayer coating film 4 thus obtained has a refractive index of 2.6 to 2.9 for light having a wavelength in the visible light region of TiO2 and a quarter wavelength of 300 to 370 [angstroms]. , The reflected light is from ultraviolet to blue. Further, the refractive index corresponding to this reflected light is limited to 2.9. Actually, the degree of oxidation varies depending on the conditions during vapor deposition, and it is necessary to correct it based on the measured data. By the way, since the multilayer coat film 4 obtained in this example reflects light having a wavelength of 4000 to 4500 [angstroms], it looks blue to the naked eye and shows a yellow color in which green and red are combined to be 5000 [angstroms] or more. The light of the wavelength is transmitted.

When the glass body 1 is viewed from the transmission surface 2 side, as shown in FIG. 1, the incident light B 1 and C 1 incident on the inner side of the transmission surface 2 is a portion where the inclination angle of the reflection surface 3 is relatively small. Is reflected by the coating film to become reflected light b1 and c1 having a specific wavelength. Therefore, this part shows a specific color. However, the incident lights A1 and D1 incident on the outside of the transmissive surface 2 are incident on the part of the reflective surface having a relatively large inclination angle at a critical angle or more and become almost the reflected lights a1 and d1. Therefore, this part has a bright white color. On the other hand, as shown in FIG. 2, when the glass body 1 is viewed from the reflecting surface 3 side, incident light B2, C2 incident on a portion near the top of the reflecting surface 3 having a relatively small inclination angle is reflected by the coating film 4. The reflected light becomes reflected lights b2 and c2 of a specific wavelength. Therefore, this part shows a specific color. Further, from the rear side as well, it is incident on the portion of the peripheral portion of the reflecting surface 3 where the inclination angle is relatively small, and this is also selectively reflected. For example, if this is used as a pendant and put on a black-colored garment and the reflecting surface 3 is faced up, the background is dark, so there is little incident light A from the rear, so the periphery is dark, the color is dark blue, and the center is relative. Bright and pale blue. Also, when combined with a background that efficiently reflects light (complementary color light) that has been transmitted through the multilayer coat film 4 without being reflected, when combined with a white blouse, yellow light that is complementary color light enters the glass body 1. Then, it concentrates in the central part and permeates through the multilayer coating film 4 to enter the eyes, so that the central part of the pendant looks yellow. Thus, when the front and back of the glass body 1 are changed and the background is changed, the color changes accordingly.

The multilayer coating film adjusts the wavelength of the reflected light not only by alternately superposing the high-refractive index film and the low-refractive index film, but also by appropriately combining integral multiples of ¼ wavelength. be able to. For example, assume that the reflection surface of the glass body is three-dimensionally shaped like a strawberry, and the other surface is a flat surface, and the reflection surface is provided with a multilayer coating film that reflects light of ¼ wavelength 1500 [Angstrom]. Formed so that it appears red to the naked eye. That is, a layer of HHLHHLHH is formed on the glass body by using CeO2 for the high refractive index film (H) and MgF2 for the low refractive index film (L). The color tone of this glass body is as follows. When viewed from a curved surface on a dark background, the strawberry ground is red, and the small depressions and seeds surrounding the seeds are dark. When viewed from the flat side on a dark background, the strawberries are red and the depressions and surroundings of the seed are light. When viewed from the curved surface on a light-colored background, the strawberry is green, and the depressions and surroundings of the seeds are green with almost no change. When viewed from the flat side on a light-colored background, the strawberries are green, and the depressions and surroundings of the seeds are light-colored.

[0009]

[Effect of the device]

 As described above, in the present invention, the transparent or semitransparent glass body having the flat transparent surface 2 and the reflecting surface 3 located on the opposite side of the transparent surface 2 and having different angles with respect to the transparent surface 2 partially. Since the base material for the accessory is formed by forming the multi-layer coating film 4 that selectively reflects only the light of the specific wavelength on the reflective surface 3 of the base material such as 1, the hue changes depending on the reverse of the front and back and the color arrangement of the surroundings. Therefore, it is possible to enjoy the change in color with one piece of jewelry and to enhance the decorative value.

[Brief description of drawings]

FIG. 1 is an optical principle diagram of a base material for accessory of the present invention.

FIG. 2 is an optical principle diagram of a base material for accessory of the present invention.

FIG. 3 is an optical principle diagram of a conventional base material for accessory.

FIG. 4 is an optical principle diagram of a conventional base material for accessory.

[Explanation of symbols]

 1 glass body 2 transmissive surface 3 reflective surface 4 multilayer coating film

Claims (1)

[Scope of utility model registration request] 1. A transparent or semi-transparent material having a flat transmissive surface and a reflective surface located on the opposite side of the transmissive surface and having different angles with respect to the transmissive surface.
A base material for accessory, comprising a multi-layer coating film that selectively reflects only light of a specific wavelength.