JPH11324515A - Heat ray shut-off body and heat ray shut-off window member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a TV ghost due to reflection while maintaining efficient heating and cooling due to heat ray shut-off and ensure no mutual interference of radio waves and communication security. SOLUTION: Since slits 4 in the vertical direction are arranged per a predetermined pitch on a heat ray shut-off face consisting of a heat ray shut-off film 3 vapor-deposited on a transparent substrate 2 such as a window glass, TV public broadcasting radio waves of horizontal polarized wave components crossing at a right angle in the vertical direction of the slit 4 penetrate from the slits 4 and radio waves of a vertical polarized wave component parallel with the vertical direction of the slit 4 do not penetrate from the slits 4 and are reflected on a heat ray shut-off face to reduce the radio wave reflection effect harmful for TV public broadcasting due to a heat ray shut-off panel 1 down to within an allowance limit of TV ghost fault and utilize it in radio wave shut-off between indoor and outdoor sides of an indoor radio system so that the maintenance of communication security of the indoor radio system and effective use of radio waves can be achieved and energy efficiency in heating and cooling is hardly impaired in the same way as the heat ray shut-off face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for, for example, a window glass of an energy-saving building or a building that shuts off electromagnetic waves indoors and outdoors. And a heat ray shielding window member using the same.

[0002]

2. Description of the Related Art Heretofore, a heat insulating film as a heat ray shield of this type has a metal thin film provided on a film surface. The thin metal grating of this thin metal film has a wavelength of 80
Although it transmits most of the visible light of 0 nm (10 ^-9 m) or less, it has the function of reflecting heat waves and radio waves having a wavelength of 1000 nm or more, which is effective for air-conditioning. It is used as an effective means to cut off heat for efficiency and to cut off electromagnetic waves to prevent interference between radio waves.

[0003] Fig. 8 shows a cross-sectional structure of a wall portion including a window member using a conventional heat ray shield, wherein (a) is a schematic diagram showing an energy input / output state during cooling, and (b) is an energy input / output state during heating. It is a schematic diagram which shows a state.

At the time of cooling, as shown in FIG. 8 (a), a window glass 52 fitted and fixed in a window frame 51 constituting a window member of a wall 50 is provided with a heat-shielding body as a heat-shielding body. A planar heat-insulating film 53 is attached, and visible light A and heat rays B are applied from the outdoor to the cooling indoor.
And incident through. At this time, 60% of the visible light A is transmitted by the heat insulating film 53, and there is a certain degree of transparency. The heating wire B is a heat insulating film 53.
By transmitting 50% of the heat and 31% of the heat, 31% of the heat is reflected, so that the heat ray B from the outside is blocked to some extent, thereby suppressing an increase in the indoor temperature, thereby increasing the efficiency of cooling.

During heating, as shown in FIG. 8 (b), 22% of the infrared rays C due to indoor heating are transmitted by the heat insulating film 53 and 78% are reflected, so that infrared rays C can be emitted from the indoor area. Evacuation is cut off to some extent to suppress indoor temperature drop to improve heating efficiency. At this time, as described above, the visible light A is
The heat-insulating film 53 transmits 60% of the heat rays B, and the heat rays B transmit the heat-insulating film 53 50%.

On the other hand, in recent years, for example, cordless systems have been developed in offices and the like.
Information exchange and various types of information processing are being carried out by performing wireless communication using such methods. In wireless communication in such offices, there is a limit to the number of wireless lines that can be used in the same area, and in order to effectively utilize the number of wireless lines, each area using the wireless line must be Each room of the building, each floor, each building, etc. are divided. Therefore, between each divided area,
It is necessary to block radio waves that leak to the outside and radio waves that enter from outside.

[0007]

However, when the above-mentioned heat ray shielding film is put into practical use, in particular, as shown in FIG.
When the metal thin film 60 as the heat ray shielding film is applied to a window glass of a high-rise building, the metal thin film 60 attached to the window glass of the high-rise building is transmitted from a television (hereinafter referred to as TV) transmission tower 61. It reflects public broadcast waves. Due to the reflection of the TV public broadcast wave, a TV ghost as a TV obstacle occurs in the surrounding area,
There is a problem that the TV images are superimposed and difficult to see.
In this TV ghost, a propagation time difference (phase shift) occurs between the directly arriving radio wave E1 arriving directly at the viewer antenna 62 and the reflected radio wave E2 reflected by the metal thin film 60 of the window glass of the high-rise building. This is what appears as a double ghost image shifted in position on the TV screen. The TV ghost causes the viewer to have impaired visual impairment, and the cost required for assuring it becomes high. Therefore, the practical use of the above-mentioned conventional heat ray shield is significantly restricted.

Further, the metal thin film 60 for blocking heat rays is also used as a multi-use technology of the same frequency indoors and outdoors, such as in a building, for effective use of a limited radio line (radio frequency band) when utilizing a radio communication system. Can be For example, as shown in FIG. 10, a window member 7 in which a metal thin film 60 for shielding heat rays is attached to a window glass of an office 70 having a building.
1 is installed, a radio terminal such as a portable radio terminal 73 in the office 70 is transmitted by a radio wave transmitted from the base station 72 of vertical polarization in the office 70 and received by the base station 72. Communication with the device is enabled. In addition, radio waves inside the office 70 and the office 70
The radio wave arriving from the outside of the
And is attenuated. For this reason, in the office 70, the chances of radio wave interference, intrusion, and interference from outside the office 70 are significantly reduced, and the opportunity for radio wave eavesdropping from outside the office 70 is also significantly reduced. As described above, the metal thin film 60 for blocking heat rays can reuse the same frequency between adjacent offices and between offices and outdoors, and thus can contribute to effective use of a radio line which is a limited radio wave resource. Things.

Also, in the case of an office 74 in a building adjacent to the office 70 provided with a window member 75 in which the metal thin film 60 for blocking heat rays is not used for a window glass, the office 74 has Radio waves transmitted from the vertically polarized base station 76 and received by the base station 76 enable communication with wireless terminal devices such as portable wireless terminals 77 and 78 inside and outside the office 74. However, a radio wave transmitted from, for example, the base station 76 in the office 74 passes through the window member 75 and leaks out of the building, and when an area where a wireless line is used is divided inside and outside the office 74, the office 74. Interference between internal and external radio waves may cause interference. For this reason, the wireless line cannot be used.
In addition, since radio waves leak from the inside of the office 74 and radio waves enter from outside the office 74, communication security such as radio wave interference, eavesdropping and intrusion is impaired, and important corporate information and personal information are not transmitted. It raises a new problem of leakage. In particular, it is fatal in the case of research institutes that value secrecy.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. It is an object of the present invention to prevent TV ghosts due to reflection and to solve the problems of radio wave interference and communication security while maintaining the efficiency of cooling and heating by cutting off heat rays. It is an object of the present invention to provide a heat-ray blocking body that can be used as well as a heat-ray blocking window member using the same.

[0011]

The heat ray shield of the present invention comprises:
A heat-ray blocking body having a function of blocking electromagnetic waves selectively and having a function of blocking heat rays, wherein gaps in one direction are arranged at a predetermined pitch on a heat-ray blocking surface formed of a heat-ray blocking film that reflects heat rays. Is what you do.

[0012] With this configuration, a plurality of gaps in one direction are arranged at predetermined intervals required for transmitting the wavelength band of the TV public broadcast wave of the horizontal polarization component on the heat ray blocking surface formed of the heat ray blocking film. If the direction is set to the vertical direction, it is possible to reduce the radio wave reflection effect harmful to TV public broadcasting due to the heat ray blocking surface to within an allowable limit of TV ghost failure.
In addition, since radio waves of vertical polarization component parallel to the vertical direction of the gap do not transmit regardless of the wavelength and are reflected at the heat ray blocking surface, they can be used for indoor radio communication systems to block radio waves between indoors and outdoors. Becomes In this way, the TV blindness is reduced, the communication security of the indoor wireless communication system is maintained and the radio waves are effectively used, and the energy efficiency of the conventional heating / cooling system using the heat ray cut-off surface is hardly impaired.

Preferably, in the heat ray blocking window member according to the present invention, the heat ray blocking film is provided on the transparent substrate, and a gap is provided between the heat ray blocking film and the heat ray blocking film in one direction at a predetermined pitch. It has. Further, preferably, the heat ray blocking film has a light transmitting property.

According to this structure, if the heat ray shielding film is provided so that a space between the heat ray shielding film and the surface of the heat ray shielding film along the surface direction of the heat ray shielding film becomes a vertical gap with respect to the already installed windows and the like. The structure of the heat ray shield of the invention is simplified. Further, if the base such as a glass plate is transparent and the heat-ray shielding film provided thereon also has a light-transmitting property, if this is applied to a window, it is possible to cut off heat rays and radio waves without a feeling of blockage.

Further, the heat ray blocking body according to claim 1 or 2 is a heat ray shielding panel or a heat ray shielding film provided with a heat ray shielding film, and the heat ray shielding panel or the heat ray shielding film is used as a heat ray shielding window member. ing.

With this configuration, the heat ray shielding panel or the heat ray shielding film can be easily applied to the heat ray shielding window member as the heat ray shielding body of the present invention.

Preferably, in the heat ray blocking window member according to the present invention, the heat ray blocking body according to claim 1 or 2 is a heat ray blocking film, and the heat ray blocking film is provided on a panel.

According to this configuration, the already installed windows can be easily reduced by a simple additional construction in which the heat ray shielding film provided on the film is attached to the panel, so that the TV visual impairment can be reduced. Thus, it is possible to maintain the communication security of the indoor wireless system and to effectively utilize radio waves, and to provide the heat ray shielding window of the present invention capable of maintaining the energy efficiency of cooling and heating.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment in which a heat ray shield according to the present invention is applied to a window member will be described with reference to the drawings. However, the present invention is not limited to the following embodiments. is not.

FIG. 1 is a view in which a heat ray shield according to one embodiment of the present invention is applied to a window member, (a) is a front view thereof,
(B) is a schematic longitudinal sectional view thereof.

1 (a) and 1 (b), a heat ray shielding panel 1 as a heat ray shielding body is directly or indirectly attached to an indoor surface of a transparent substrate 2 such as a resin plate or a glass plate of polyester or the like. In addition, a heat ray blocking film 3 made of a conductive metal thin film such as gold or tungsten that reflects heat rays is provided by being deposited or attached. Vertical slits (gap) 4 are arranged at predetermined intervals on the heat ray blocking surface of the heat ray blocking film 3. A conductive panel frame 5 that fits and supports the outer peripheral edge of the heat ray shielding panel 1 is provided around the heat ray shielding panel 1. In the present embodiment, the heat ray shielding panel 1 has a panel frame 5 as a window frame (aluminum sash) attached to a wall of a room such as a building, for example.

The heat ray blocking film 3 is made of a conductive metal thin film and is deposited on a resin plate or a glass plate, and transmits visible light having a wavelength of 800 nm (800 × 10 ⁻⁹ m) or less that can pass through the crystal metal lattice. However, it has a function of reflecting waves such as heat rays and radio waves (TV public broadcast radio waves and wireless radio waves) having a wavelength of 1000 nm or more. By the way, the frequency band of the TV public broadcast wave is 90 to 222 MH in VHF.
z (ch1-12), 470-770MHz in UHF
(Ch13 to 62). This heat ray reflection is effective in improving the efficiency of cooling and heating, and the reflection of radio waves is effective in preventing interference between radio waves. However, in order to prevent TV ghosts, it is necessary to adopt a configuration in which only the radio waves of TV public broadcasting are not reflected. In the present invention, a plurality of vertical slits 4 are provided at a predetermined pitch on the heat ray shielding surface of the heat ray shielding film 3 to prevent reflection of the TV public broadcast radio wave.

That is, in the Babinet and Booker's extension theorem, in the case of a vertical slit 4, the electric field of a horizontal radio wave (horizontal polarization component H) orthogonal to the slit 4 is Although passing through the slit 4, the electric field of the vertical radio wave (vertical polarization component V) parallel to the slit 4 is reflected by the heat ray blocking film 3. Currently, T
V Public broadcast radio waves have a horizontal polarization component H in which the electric field fluctuates in the horizontal direction
In addition, the radio wave of the wireless system is a vertical polarization component V in which an electric field fluctuates in the vertical direction. Therefore, if a plurality of vertical slits 4 are provided at predetermined intervals on the heat ray blocking surface of the heat ray blocking film 3, the radio wave of the vertical polarization component V is reflected, and the TV public broadcast of the horizontal polarization component H is provided. The radio wave is transmitted through the slit 4 and reflected.

The width and pitch of the slit 4 are as follows:
There is an appropriate value according to the wave diffraction theory of Young and Fresnel. By setting the width and pitch of the slits 4 to appropriate values, the horizontal polarization component H, which is frequently used in TV public broadcast waves, efficiently passes through the slits on the film surface to reduce the reflection of the radio waves and move indoors. It is possible to block indoor and outdoor electromagnetic waves while maintaining the reflection of the vertically polarized component V that is frequently used in wireless systems. Further, as described above, the vertical slit 4 is provided with a Babinet and a booker.
According to the extension theorem according to r), there are preferable conditions for transmitting the TV public broadcast wave of the horizontal polarization component H, and preferable conditions for maintaining the reflection of the radio wave of the vertical polarization component V. By utilizing these conditions, it is possible to both reduce reflection of TV public broadcast radio waves and cut off radio waves.

Here, as shown in FIG. 1, a vertical slit 4 having a width of 1 mm is formed in the heat ray shielding surface of the heat ray shielding film 3.
An experimental example in the case of arranging at intervals of 6 mm (pitch) will be described below. The specific example of the slit 4 having a width of 1 mm and a pitch of 46 mm is an appropriate value obtained from Young's and Fresnel's theory of wave diffraction. In general, in physics, when the dispersion characteristic can be neglected (when the physical unit does not change with the frequency and the wavelength), it is proven that the operation is the same even with the scale model. Here, instead of an experiment on a large building, the effect will be described with an experimental example of a scale model that can measure more precisely.

The heat ray shielding panel 1 is installed so as to face the opening of the transmitted radio wave, and as shown in FIG. 2, the incident light L passing through the slit 4 between the heat ray shielding films 3.
Is projected onto the projection surface 15 located at a distance D from the heat ray shielding film 3. The width of the slit 4 is 2a, the pitch of the slit 4 is d, and the incident light L incident on the slit 4 at the incident angle θa is diffracted by the output angle θ. The x direction is a horizontal direction orthogonal to the plurality of slits 4 in the vertical direction.

As shown in FIG. 3, the TV public broadcast radio wave of the horizontal polarization component H and the radio wave of the vertical polarization component V incident on the heat ray shielding panel 1 are a heat absorption component D and a reflection component E. And a transmission component F. The heat absorption is caused by the resistance component of the film. If the energy of the heat absorption component D and the energy of the transmission component F are large, the energy of the reflection component E is reduced accordingly.

Further, when the width 2a of the slit 4 in FIG. 2 is close to the wavelength of the radio wave, it can be analyzed by the equation (1), and the width 2a of the slit 4 is smaller than the wavelength of the radio wave. In this case, it can be analyzed by the equation (Equation 2). The former equation (Equation 1) is known as an extension of Young's diffraction theory, and the latter equation (Equation 2) is known as an extension of Fresnel's diffraction theory. Summarizing the calculation results of these equations, when the width 2a of the slit 4 is larger than the wavelength of the radio wave (when the wavelength of the radio wave is shorter than the gap), it corresponds to the transmission of a heat ray, and FIG. Heat ray shielding film 3
The projection pattern in which the incident light L passing through the slit 4 is projected onto the projection surface 15 in FIG. 4B has a high energy intensity and the shape of the slit itself. Therefore, the amount of transmitted heat rays is given by the ratio of the area of the slit 4 to the area of the film.

Further, the wavelength of the radio wave becomes longer and the slit 4
In the case where the wavelength is close to the width 2a or the horizontal polarization component H, the incident light L that has passed through the slit 4 that is the slit of the heat ray blocking film 3 in FIG. The energy intensity of the projection pattern projected on the surface 15 becomes wavy. In the case where the wavelength of the radio wave is further increased and the wavelength is longer than the width 2a of the slit 4 or in the case of the vertical polarization component V, it passes through the slit 4 which is the slit of the heat ray shielding film 3 in FIG. The incident light L is projected onto the projection surface 1 shown in FIG.
The energy intensity of the projection pattern projected on 5 is slightly broadened as a whole.

[0030]

(Equation 1)

[0031]

(Equation 2)

As described above, depending on whether the width 2a of the slit 4 is substantially equal to or smaller than the wavelength of the radio wave, the Young's diffraction theory of (Equation 1) and the Fresnel's diffraction theory of (Equation 2) are used. Perform the operation. As a result, the condition of the transmission loss characteristic shown in FIG. Although the exact solution of the heat absorption has not been completed yet, it can be understood qualitatively that it is generated for the horizontal polarization component H by the theory proposed by Babinet. These theories are linear, and the results of the scale model can be adapted to any frequency. The optimal design based on the equations (1) and (2) is also an element of the present invention.

FIG. 5 is an actual measurement example of the transmission loss with respect to the frequency of the horizontal polarization input and the vertical polarization input. As is clear from FIG. 5, almost all electromagnetic waves are transmitted through the horizontal polarization component H with slight reflection, whereas almost (about 999/1000) the vertical polarization component V is transmitted. It can be seen that only about 1/1000 is reflected and reflected, and a large transmission loss is received. Therefore, the transmission loss differs between the horizontal polarization component H and the vertical polarization component V by 1000 times. This indicates that light is well reflected without transmitting.

FIG. 7 shows the reflection characteristics measured by the measurement system shown in FIG. In FIG. 6, there is a 12-element log-periodic antenna 12 between which a signal from the signal generator 11 can be transmitted and a DUT (400 × 400 mm metal reflector and a film with a slit). Position at a distance of 150 mm (wavelength 300
18mm diameter loop antenna 13
, And a measuring device 14 is connected to the loop antenna 13. The heat ray shielding panel 1 as an object to be measured is configured to be movable so that the distance from the 12-element log periodic antenna 12 can be changed.

In this measurement system, the loop antenna 13
The measuring device 14 measures the difference between the electric field energy of the radio wave arriving from the 12-element log periodic antenna 12 and the electric field energy of the radio wave reflected and returned by the heat ray shielding panel 1 as an object to be measured. It is possible.

The accuracy of the reflection characteristic is considered to be difficult due to the surrounding environment, and the value M of the metal plate is also shown for reference. As is clear from FIG. 7, a return loss of 20 dB, which is the allowable limit of the TV ghost failure, is obtained for the horizontal polarization component H. On the other hand, the vertical polarization component V is accompanied by a loss of 30 dB or more, which reduces the chances of interference, interference, eavesdropping, and intrusion of indoor and outdoor communication systems by 1/1000.
The following shows the improvement.

In addition, if a rough calculation is made, the reflection loss for the horizontal polarization component H is 20 dB (VSWR = 1.22),
For the vertically polarized component V, the return loss is 12.7 dB (VS
WR = 1.6), the return loss for the metal plate F is 5.8d
B (VSWR = 3.1), and the reflection loss of the horizontal polarization component H of 20 dB can be said to be within the allowable limit of the TV ghost failure.

Therefore, by arranging the vertical gaps at a predetermined interval on the heat ray blocking surface made of the heat ray blocking film, the TV public broadcast radio wave of the horizontal polarization component orthogonal to the vertical direction of the gap is transmitted through the gap, Since the radio wave of the vertically polarized component parallel to the vertical direction does not pass through the gap and is reflected by the heat ray shielding surface, the radio wave reflection effect harmful to the TV public broadcasting associated with the heat ray shielding panel 1 using the metal thin film of the present invention is taken into consideration. It can be reduced to within the allowable limit of ghost failure, and it can be used for indoor radio system indoor and outdoor radio wave blocking, maintaining communication security of indoor radio system and effectively utilizing radio waves, As with the conventional heat ray blocking surface, the energy efficiency of cooling and heating is hardly impaired.

In this embodiment, as an example of the heat ray blocking body, a heat ray blocking film 3 made of a thin metal film is provided on a transparent substrate 2 such as a resin plate or a glass plate of polyester by vapor deposition. Although the heat ray shielding panel in which vertical gaps are arranged at predetermined intervals on the heat ray shielding face has been described, the invention is not limited to this, and the transparent substrate 2 may be a film such as polyester. The heat ray blocking film 3 made of a metal thin film may be provided by vapor deposition or the like, and a heat ray blocking film in which vertical gaps are arranged at predetermined intervals on the heat ray blocking surface of the heat ray blocking film 3 may be used. When such a heat ray blocking body of the present invention is applied to a window, it is desirable that the heat ray shielding film 3 has translucency.

In particular, when a metal thin film is vapor-deposited on a film and further attached to the glass surface, stress is generated between the film and the glass due to a difference in expansion coefficient between the film and the glass, and the deterioration occurs over time. According to the invention, the stress can be minimized by the presence of the gap (slit).

Further, in the present embodiment, the heat ray shielding film 3 is provided so that the slits 4 having a width of 1 mm are arranged at intervals of 46 mm, but this is within the range indicated by the above-mentioned equations (1) and (2). Is a specific example, and the effect of the present invention is not limited only to this numerical value.

Further, in the above embodiment, the heat ray shielding film 3
Although the electromagnetic shielding panel 1 provided on the window glass has been described as being configured to be freely inserted into the window frame, a roll blind for shielding heat rays may be used. In this case, the heat blind roll blind is placed near the window glass of a room such as a building,
The heat ray shielding sheet drawn from the winding roll may be provided by being folded back via a play roll. This heat ray shielding sheet has slits arranged in one direction (vertical direction) at a predetermined pitch on a heat ray shielding surface composed of a heat ray shielding film 3 on a transparent film sheet made of resin or a light shielding film sheet for sunshade. Then, the effects of the present invention can be obtained.

In addition to such a heat-ray-blocking roll blind, a "push-up" provided near the window glass,
Even if slits in one direction (vertical direction) are arranged at a predetermined pitch on the heat ray shielding surface composed of the heat ray shielding film 3 on a member surface such as a roll screen, a blind and a curtain, the principle and effects of the present invention are not changed. Absent.

All the operations described above are based on the principle of reversibility in electromagnetic waves, regardless of the arrival direction of electromagnetic waves.
It is clear that it works. It can be seen that it is electromagnetically possible to correct the number of inserted glasses and the dielectric constant in addition to this operation.

[0045]

As described above, according to the first aspect, by arranging the vertical gaps at predetermined intervals on the heat ray blocking surface made of the heat ray blocking film, the horizontal polarization component of the gap perpendicular to the vertical direction of the gap is formed. TV public broadcast radio waves are transmitted through the gap, and radio waves of vertically polarized components parallel to the vertical direction of the gap are not transmitted through the gap but are reflected by the heat ray cut-off surface. It is possible to prevent TV ghost due to reflection, and to solve problems of radio wave interference and communication security.

According to the second and third aspects of the present invention, the heat rays are shielded so that a gap between the heat rays shielding film and the surface of the heat rays shielding film in the surface direction becomes a vertical gap with respect to the already installed windows and the like. It is sufficient to provide a film, and the configuration of the heat ray shield of the present invention can be simplified. Further, the substrate such as a glass plate is transparent, the heat ray blocking film provided thereon also has a light-transmitting property,
If this is applied to a window, it is possible to realize blocking of heat rays, blocking of radio waves, and prevention of reflection of TV public broadcast radio waves without a feeling of blockage.

Further, according to the fourth aspect, the heat ray shielding panel or the heat ray shielding film can be easily applied to the heat ray shielding window member as the heat ray shielding body of the present invention.

Further, according to the fifth aspect, the window already installed is easily reduced by additional work of merely providing the heat ray shielding film on the heat ray shielding panel, so that TV obstruction obstruction can be easily reduced. The heat ray shielding window of the present invention can maintain communication security and effectively use radio waves, and can maintain energy efficiency of cooling and heating in the same manner as a conventional heat ray shielding surface.

[Brief description of the drawings]

FIG. 1 is a view in which a heat ray shield according to an embodiment of the present invention is applied to a window member, where (a) is a front view thereof and (b) is a schematic longitudinal sectional view thereof.

FIG. 2 is a cross-sectional view of the heat ray shield of FIG. 1 for explaining each element of (Equation 1) and (Equation 2).

FIG. 3 is a view showing reflection, transmission and absorption of the heat ray shield of FIG. 1 with respect to a wave;

FIG. 4 is a diagram showing energy intensity on a projection plane of a wave transmitted through a slit of the heat ray shield of FIG. 1;

FIG. 5 is an actual measurement diagram of transmission loss with respect to the frequency of the horizontal polarization input and the vertical polarization input in the heat ray shield of FIG. 1;

FIG. 6 is an experimental view showing a reflection measurement system of a horizontal polarization input and a vertical polarization input in the heat ray shield of FIG. 1;

FIG. 7 is an actual measurement diagram by the reflection measurement system of FIG. 6;

8A and 8B show a cross-sectional configuration of a wall portion including a window member using a conventional heat ray shield, wherein FIG. 8A is a schematic diagram showing an energy input / output state during cooling, and FIG. 8B is a schematic view showing an energy input / output state during heating. FIG.

FIG. 9 is a diagram for explaining a principle of a ghost failure in TV public broadcasting.

FIG. 10 is a diagram for explaining a conventional indoor / outdoor wireless communication system using the same frequency.

[Description of Signs] 1 Heat ray shielding panel 2 Transparent substrate 3 Heat ray shielding film 4 Gap 5 Panel frame

Claims (5)

[Claims] 1. A method for selectively blocking electromagnetic waves from electromagnetic waves,
What is claimed is: 1. A heat-ray blocking body having a heat-ray blocking function, wherein one-way gaps are arranged at a predetermined pitch on a heat-ray blocking surface formed of a heat-ray blocking film that reflects heat rays. 2. The heat ray shielding body according to claim 1, wherein the heat ray shielding film is provided on a transparent substrate, and has a gap in one direction at a predetermined pitch between the heat ray shielding films. 3. The heat ray blocking body according to claim 1, wherein the heat ray shielding film has a light transmitting property. 4. The heat ray shielding window member according to claim 1, wherein the heat ray shielding body is a heat ray shielding panel or a ray shielding film provided with a ray shielding film. 5. A heat ray blocking window member, wherein the heat ray blocking body according to claim 1 is a heat ray blocking film, and the heat ray blocking film is provided on a panel.