JPH06239644A - Pane glass material, far-infrared light sensor device using the same and production of the material - Google Patents

Abstract

PURPOSE:To enable easy production of a far infrared light-transmitting pane glass of greatly improved transmittance by making the pane glass from a glass material comprising at least one of Ge and As besides chalcogens. CONSTITUTION:Pane glass 20 is produced by press-molding a glass material comprising at least one selected from Ge and As besides chalcogens in a temperature range from 10 to 100 deg.C higher than the softening point of the glass material to 400 deg.C and set to the window part of the infrared light sensor unit 1. Thus, the infrared light transmittance is increased compared with polyethylene plate, thus wrong and foul operations of the far-infrared light sensor device can be avoided whereby the reliability of ventilation system is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass window material which can be used for a sensor device for detecting far infrared light of precision optical equipment, a sensor device for detecting far infrared light using the same, and the glass window material. Manufacturing method.

[0002]

2. Description of the Related Art In recent years, an air conditioning system has been developed in which far infrared light emitted by a human body is detected by a pyroelectric sensor and the signal thereof is used for control. This system has a wavelength of 4 to 12 μm that the human body selectively emits
Using m far infrared light, the number of people existing in the air-conditioned space and the skin temperature are measured to provide optimum air conditioning.

As an example, a domestic air conditioner equipped with the sensor unit (sensor device for detecting far infrared light) of FIG. 3 has been realized. A far-infrared light sensing sensor device 1 for sensing far-infrared light includes a chopper 3 driven by a drive unit 2 to form a waveform, an infrared lens 4 for collecting infrared light, and an infrared lens 4 from the infrared lens 4. By moving the pyroelectric sensor 5 that outputs an electric signal according to the amount of infrared light, the amplifier circuit 6 that amplifies the output from the pyroelectric sensor 5, the infrared lens 4, the pyroelectric sensor 5, and the amplifier circuit 6, A horizontal drive unit 7 for changing the field of view, detects far-infrared light emitted from a subject 8 as an object, and outputs a signal thereof to a control unit 9 including a microcomputer.
It is designed to output to. Here, in the case of the sensor device 1 for detecting far-infrared light of this air conditioner, a polyethylene plate 1 having a thickness of about 2 mm is used for the purpose of maintaining the aesthetic appearance of the air conditioner body.
The polyethylene plate 10 has a far-infrared light transmittance of 20 when the wavelength is 8 μm.
%, 50% for 10 μm, 40% for 12 μm
Met.

[0004]

However, in the far infrared light sensing sensor device 1 having the above-mentioned conventional structure, more than half of the far infrared light is absorbed by the polyethylene plate 10.
The sensor sensitivity was significantly reduced, causing many malfunctions and malfunctions.

The present invention is intended to solve the above problems, and a glass window material which does not reduce the sensor sensitivity of a far infrared light sensing sensor device, and a far infrared light sensing sensor device using the same. It is an object of the present invention to provide a method for manufacturing this glass window material.

[0006]

In order to solve the above-mentioned problems, the glass window material of the present invention is formed of a glass element body containing at least one of germanium and arsenic and a chalcogen element.

Further, in the far-infrared light sensing sensor device of the present invention, the glass window material of the far-infrared light sensing sensor device is formed of a glass element body containing at least one of germanium and arsenic and a chalcogen element. It is a thing.

The method of manufacturing a glass window material of the present invention is
A glass body made of at least one of germanium and arsenic and a chalcogen element is not subjected to a pre-polishing process or a pre-forming process, and is 10 ° C to 10 ° C from the softening point of the glass body.
A window material is manufactured by press molding in a temperature range of 0 ° C. higher and 400 ° C. or lower, and further, press molding is performed by a mirror finish molding die.

[0009]

According to the glass window material having the above structure, the far infrared light transmittance is 70% when the wavelength is 8 μm and 70% when the wavelength is 10 μm.
%, It becomes 50% in the case of 12 μm, the transmittance of far infrared light is improved by about 40% as compared with the polyethylene plate, and excellent far infrared light transmittance can be obtained.

Further, by disposing the glass window member in the window portion of the sensor device for detecting far infrared light, the transmittance of far infrared light is improved, so that malfunctions and malfunctions of the sensor are eliminated. Further, according to the method for manufacturing a glass window material having the above structure,
Since glass can be pressed and formed with sufficient fluidity at a temperature (400 ° C or less) that does not change the shape of the pressing press mold, it is possible to manufacture good window materials without bubbles, and also to give a mirror finish. By press-molding with a die, the window material surface after pressing can be manufactured with high precision, which is extremely close to the mirror surface of the die. Further, since the glass is molded and processed at a low temperature without performing preliminary polishing, it is possible to provide a glass window material for infrared light transmission with high productivity and at low cost.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A window material for a sensor device for detecting far infrared light according to an embodiment of the present invention and a method for manufacturing the same will be described below with reference to the drawings. In addition, the same reference numerals are given to those having the same functions as the conventional ones, and the description thereof will be omitted.

FIG. 1 is a block diagram showing a schematic structure of a sensor device for detecting far infrared light in the air conditioning system of this embodiment. The difference from the conventional air conditioning system is that the window material is changed from polyethylene to chalcogenide glass. That is, the glass window member 20 is formed of a glass element body containing at least one of germanium and arsenic and a chalcogen element.

Next, a method of manufacturing the glass window material 20 will be described. First, a glass material made of at least one of germanium and arsenic and a chalcogen element is formed into a rod shape, which is then sliced to obtain a flat glass body. Then, this glass body is molded by a molding device.

FIG. 2 is a sectional view showing the schematic construction of the glass window material molding apparatus. As shown in FIG. 2, a pair of molding dies 21, 22 made of tungsten carbide or the like is installed in a body mold 24 made of tungsten carbide or the like so as to be retractable and retractable, and between the molding dies 21, 22. The flat glass body 23 is sandwiched between them. The glass body 23 is pressed by the press cylinders 26 and 27 having the heater 25 therein.
The glass window member 20 having a predetermined shape and a predetermined optical mirror surface is obtained by heating at a temperature 10 ° C. higher than the softening point of 3 and then lowering the press cylinder 27 to press-mold the glass body 23. .

Six types of glass were used in this example, and (Table 1) shows the lens surface roughness when the material and the pressing temperature are changed, the degree of mold deformation, and the state of bubble of the lens. Show. The softening point of the glass body 23 was adjusted by changing the composition ratio of at least one of germanium and arsenic to the chalcogen element.

[0016]

[Table 1]

All of these chalcogenide glasses satisfactorily transmit infrared light, and their far infrared light transmittance is 8 wavelengths.
70% for μm, 70% for 10 μm, 12μ
In the case of m, it became 50%. The surface roughness of the flat glass body 23 before pressing is about 2 μm,
It was not an optical mirror surface.

As can be seen from (Table 1), in this embodiment, the glass body 23 having a softening point higher than 400 ° C. is not suitable for press molding because thermal deformation of the molding dies 21 and 22 cannot be avoided. Can be judged. Further, when the glass body 23 having a softening point of 390 ° C. or less in (Table 1) is press-molded at the temperature of the softening point, the molding dies 21 and 22 are hardly deformed, but the press molding is performed at the softening point. Even if the glass body 23 is insufficient in fluidity, air bubbles are generated and the glass window member 20 does not function. On the other hand, when pressure molding is performed in a temperature range higher than the softening point by 10 to 100 ° C., bubbles are not caught in the surface of the glass window material 20, and the surface of the glass window material 20 is sufficiently smooth and has an optical mirror surface. Therefore, the transmission characteristics of the glass window material 20 for transmitting infrared light were sufficiently satisfied. In addition, when press molding is performed at a temperature higher than the softening point by 100 ° C. or more, the glass body 23 becomes the molding dies 21, 22.
However, there is a problem that the glass body 23
When pressed at a temperature lower than the softening point of
No. 3 was cracked without having a predetermined window shape.

From this result, as the glass body 23,
The glass window material 20 is formed by press molding in a temperature range of 10 ° C. to 100 ° C. higher than the softening point of the glass body 23 and 400 ° C. or less.
It can be seen that it is suitable to manufacture

Although the glass window member 20 is used in the far infrared light sensing sensor device in the above-mentioned embodiments, other glass devices can be used as long as they utilize the excellent infrared light transmission characteristics. It can also be applied to products.

[0021]

As described above, according to the glass window material of the present invention, by forming the glass window material from the glass element body containing at least one of germanium and arsenic and the chalcogen element, the far infrared light transmittance is improved. Is improved by about 40% as compared with the polyethylene plate, and excellent far infrared light transmittance can be obtained.

By providing this glass window material in the window portion of the far infrared light sensing sensor device, the far infrared light transmittance can be increased, and the far infrared light sensing sensor device malfunctions. And malfunctions can be prevented, and the reliability of the air conditioning system can be improved.

Further, a glass body made of at least one of germanium and arsenic and a chalcogen element is provided at a temperature of 10 to 100 ° C. and 400 ° C. above the softening point of the glass body.
By manufacturing the window material by pressure molding in the following temperature range,
It is possible to obtain a window material that does not generate bubbles on the surface of the window material during press molding, and by pressing with a mirror-finished die, the surface of the window material after pressing is highly accurate, very close to the mirror surface of the die. You can make things. Further, since the molding process is performed at a low temperature without performing preliminary polishing, it is possible to manufacture the window material for transmitting infrared light with high productivity and at low cost. Easy to make.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a far infrared light sensing sensor device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a molding device for a glass window material of a sensor device for detecting far infrared light according to one embodiment of the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a conventional far infrared light sensing sensor device.

[Explanation of symbols]

 1 Far Infrared Light Sensing Sensor Device 8 Subject (Object) 20 Glass Window Material 21, 22 Molding Mold 23 Glass Element Body 24 Body 25 Heater 26, 27 Press Cylinder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiko Yoshida 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A glass window material formed of a glass body containing at least one of germanium and arsenic and a chalcogen element. 2. A far-infrared light sensing sensor device for sensing far-infrared light emitted by an object, wherein at least one of germanium and arsenic and a chalcogen element are included in a window portion into which far-infrared light is incident. A far-infrared light sensing sensor device provided with a glass window material formed of a glass body. 3. A glass window material obtained by press-molding a glass body composed of at least one of germanium and arsenic and a chalcogen element in a temperature range of 10 ° C. to 100 ° C. higher than the softening point of the glass body and 400 ° C. or lower. A method for manufacturing a glass window material for manufacturing. 4. The method for manufacturing a glass window material according to claim 3, wherein the glass window material is manufactured by press molding with a mirror-finishing molding die to produce a glass window material having an accuracy close to the mirror surface of the molding die.