JPH11281935A - Spectacles for protecting electromagnetic wave and spectacle glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to protect the eyeballs against the electromagnetic waves radiated from office automation apparatus by providing spectacle glass formed by providing the one surface of a glass material with a transparent conductive film consisting essentially of indium oxide and tin oxide. SOLUTION: The spectacle glass is constituted by laminating a first AR coating layer 2, an ITO film 3 and a second AR coating layer 4 on the surface of the glass material 1. The glass material 1 has a central thickness of 1.5 to 1.7 mm and is worked as a lens at need. The compsn. of the glass body is not particularly limited. The glass body contains rare earth elements (cerium Ce, neodymium Nd, praseodymium Pr). As a result, a deep valley is formed on the upper side of a wavelength 550 nm which is the peak of visual sensitivity in a transmission characteristic and a high-contrast lens having the improved visibility of a visible region is embodied. Since the spectacle glass has electrical conductivity, the direct irradiation of the eyeballs with the electromagnetic waves from the office automation apparatus may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to spectacle glasses provided with a transparent conductive film and spectacles provided with such spectacle glasses, and relates to an invention for surely protecting eyes from electromagnetic waves radiated from OA equipment. It is.

[0002]

2. Description of the Related Art For the purpose of rationalizing administrative departments, now that OA has been established in each company, it is indispensable for female employees, in particular, to operate OA equipment including computers in their daily work. Considering such business environment,
2. Description of the Related Art Conventionally, it has been proposed to electromagnetically shield a human body from a computer device. For example, apron-shaped protective clothing for women has been used.

[0003]

However, even if such protective clothing is worn, the human body still has a portion exposed to the electromagnetic waves, and particularly the eyes of the human eyes watch the display screen of the OA equipment. Even though he / she is tired, electromagnetic waves from the display screen are constantly radiated to the eyeballs, and there is a concern that this may adversely affect the human body. The present invention has been made in view of this problem, and an object of the present invention is to provide spectacles capable of protecting eyes from electromagnetic waves radiated from OA devices, and to provide spectacle glasses therefor.

[0004]

In order to achieve the above-mentioned object, an eyeglass according to the present invention comprises a transparent conductive film (ITO) containing indium oxide and tin oxide as main components on one side of a glass material.
And a spectacle glass provided with a film.
Further, the spectacle glass according to the present invention, on one side of the glass material,
A transparent conductive film mainly containing indium oxide and tin oxide is provided. In these inventions, since the eyeglasses are conductive, it is possible to prevent the electromagnetic waves from the OA equipment from being directly radiated to the eyes. And
When the thickness of the transparent conductive film is several thousand angstroms or less, the average transmittance in the visible region can be maintained at 70% or more, and there is no problem in use. In addition, since the eyeglass glasses of the present invention are conductive, they are prevented from being charged by static electricity (discharge occurs when a finger touches the glass material), and dust and the like are hardly attached.

[0005] The spectacle glass according to the present invention preferably comprises
The glass material after the polishing process is immersed in a chemical strengthening solution, and the strengthening process is performed by ion exchange.
Further, a low reflection film is vacuum deposited. In the case of this invention,
Since the glass cloth is thinned to about 1 mm to 2 mm (preferably 1.5 to 1.7 mm) by polishing, chemical strengthening treatment by ion exchange is performed instead of heat strengthening treatment.
The reason why the chemical strengthening treatment is performed is to simultaneously pursue the lightness of the lens and the strength of the lens. The chemical strengthening liquid for ion exchange contains potassium nitrate as a main component, and potassium ions enter the polished glass material to strengthen the glass material. The chemical strengthening liquid is preferably 4
It is heated to about 00 ° C. to 500 ° C., more preferably to about 450 ° C. The glass material is not particularly limited, but preferably contains Na ₂ O. In addition, a low-reflection film (AR coat) is preferably vacuum-deposited on the glass material after the strengthening treatment. As the low-reflection film, a multilayer film in which a metal oxide and a fluoride are laminated is formed on one surface of the glass material. Preferably, it is formed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments. FIG. 1 illustrates a cross-sectional shape of eyeglass glasses according to an example. A first AR coat layer 2, an ITO film 3, and a second AR coat layer 4 are formed on a surface of a glass material 1. It is configured to be laminated. The glass material 1 has a center thickness of 1.5 to 1.7 mm, and is subjected to lens processing as necessary. Although the composition of the glass cloth is not particularly limited, the composition in Table 1 is used in this example. This glass fabric is characterized by the fact that rare earth elements (cerium Ce, neodymium Nd, praseodymium Pr) are mixed therein, and has a transmission characteristic as shown in FIG. That is, by mixing neodymium Nd or praseodymium Pr, a deep valley is formed above the wavelength of 550 nm, which is the peak of visibility, and a high-contrast lens with improved visibility in the visible region can be realized. The refractive index N _D measured by sodium light source is a N _D = 1.5415.

[0007]

[Table 1]

The glass cloth having the above composition is polished and finished to a mirror surface, and thereafter, is heated and stirred in a strengthening solution for 16 hours to be chemically strengthened. Here, the strengthening liquid is a liquid composed of 99.5% of potassium nitrate (Potassium Nitrate) and 0.5% of silicic acid (Silicic Acid). 16
Let react for hours. By this treatment, Na ions having a small ionic radius are replaced with K ions having a large ionic radius, and the strength of the glass surface is increased. The chemically strengthened layer on the glass surface is about several microns.

[0009] The sample subjected to such chemical strengthening treatment was subjected to an impact resistance test by a public organization, and the diameter was 55 mm.
Sample of the US national standard (ANSI Z80.199)
When the test was performed under the conditions specified in 6), a test result of “conformity” was obtained. This impact resistance test is 16mm in diameter
(5 / 8-in), a steel ball weighing 16.1 g (0.57 oz) was allowed to fall naturally onto the sample from a height of 1.27 m, but the sample was not crushed.

In this embodiment, a first AR coating (anti-reflect) is applied to the glass material 1 which has been chemically strengthened.
ion) layer 2 is provided. Specifically, the AR coat layer 2 is formed by laminating a metal oxide and a fluoride. On the AR coat layer 2, an ITO film 3 made of a mixture of indium oxide and tin oxide is formed. This I
The thickness of the TO film 3 is usually several hundreds to several thousand angstroms. In this embodiment, the thickness of the TO film 3 is 1500 angstroms. Finally, a second AR coat layer 4 is formed by laminating a metal oxide and a fluoride on the ITO film 3. Due to the presence of such an AR coat layer, reflection on the spectacle glass surface is suppressed, and a high transmittance can be realized due to a small reflection loss.
As described above, in the spectacle glass illustrated in FIG. 1, since the ITO film 3 is provided on the front surface of the spectacle lens, the OA
Electromagnetic waves radiated from the device and the like are blocked by the ITO film 3, and the eyeball of the device worker is reliably protected.
FIG. 3 shows the transmittance of the ITO film 3, and the average transmittance in the visible region is maintained at 70% or more.

[0011]

As described above, according to the present invention, it is possible to realize spectacles capable of protecting eyes from electromagnetic waves radiated from OA equipment and the spectacle glasses.

[Brief description of the drawings]

FIG. 1 illustrates a cross-sectional structure of eyeglass glasses according to an embodiment.

FIG. 2 illustrates the transmission characteristics of the glass cloth used in this example.

FIG. 3 illustrates the transmission characteristics of an ITO film used in this example.

Claims (4)

[Claims] An eyeglass comprising eyeglass glass provided with a transparent conductive film mainly containing indium oxide and tin oxide on one surface of a glass material. 2. Glasses having a transparent conductive film containing indium oxide and tin oxide as main components on one surface of a glass material. 3. A glass material after polishing is immersed in a chemical strengthening solution, a strengthening process is performed by ion exchange, a low-reflection film is vacuum-deposited on the glass material after the strengthening process, and then the transparent conductive film is provided. 3. The glasses according to claim 2, further comprising vacuum-depositing a low reflection film. 4. The glasses according to claim 3, wherein the low reflection film is a multilayer film in which a metal oxide and a fluoride are laminated.