JPH08129106A - Lighting louver - Google Patents

Abstract

PURPOSE: To decrease the quantity of the direct sunshine entering the human body, etc., but not to darken the interior of a room and further, to assure an external visual field by freely turnably disposing plural sheets of vane plates which are formed by laminating hologram sheets on a transparent plate and are long in a horizontal direction. CONSTITUTION: Plural sheets of the hologram sheets are adhered to transparent resin plates of a polycarbonate or acryl, etc., or transparent planar bodies of sheet glass, etc., thereby preparing the vane plates 1. Both ends of the respective vane plates 1 are freely turnably and pivotally supported by angle adjusting rods 2, 2. Further, a louver 4 supported by a vertically driving cord 3 for vertically moving the vane plates is built into the space part of two sheets of sheet glass 5, 5, by which the laminated glass 6 is formed. When the sunshine of altitude ϕ1 is made incident as light R1 of 80 deg. which is the culmination altitude of about, for example, latitude about 36 deg., most of this light is diffracted as diffracted light S1 like a solid line and most of the light longer in the wavelength than this light is further diffracted upward if the angle α of inclination of the vane plates is inclined 30 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects sunlight from an opening such as a window for building,
The present invention relates to a louver that reduces direct sunlight that enters an area (hereinafter, referred to as a predetermined area) that is not preferable when the equipment is directly irradiated with sunlight.

[0002]

2. Description of the Related Art Conventionally known blinds, louvers, and the like have a vane plate made of a light-shielding plate or a light-transmitting frosted glass.

When a light-shielding plate is used, light is completely blocked depending on the angle of the vane plate to darken the room, and even when the vane plate is horizontal, the external visibility is considerably impaired. .

When a light-transmitting plate such as frosted glass is used, scattering of light not only impairs the external field of view as in the case of using a light-shielding plate, but also
It is inevitable that direct sunlight will enter your eyes.

The present invention has been made in view of the above circumstances, and reduces the amount of direct sunlight entering the human body or the like, but does not darken the room, and can also secure the external visibility. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION The present invention is characterized in that a plurality of horizontally extending blade plates, each having a hologram sheet laminated on a transparent plate, are rotatably disposed.
It is preferable that the hologram diffracts sunlight into the interior of the room or the ceiling and removes it from a predetermined area to collect light, and a plurality of vanes may be provided between two transparent plate-like bodies to form a double-layer glass.

[0007]

The operation of the present invention will be described with reference to FIGS.
A hologram sheet is laminated on a transparent plate
Sunlight is reflected on a plurality of long blades 1₁Incident as
When there is no blade, it is almost T as shown by the dotted line.₁As
Go straight, but the wing plate 1 with hologram sheets laminated
Because there is sunlight R ₁Is a transparent hologram sheet
Whether it is a reflective type or a reflective type
Since it is diffracted so as to be specularly reflected by the diffraction grating,
Considering when the sun's altitude is highest at that time,
When altitude φ₁Light R₁(Angle of incidence on the hologram sheet
θ₁) Is incident on the human body, OA equipment, etc.
Diffracted light S outside the area₁(The angle to the horizontal line H is φ₂, Times
Diffraction angle θ formed by the folded light and the normal to the blade₂) Turn upwards
Fold. At this time, the diffraction angle changes depending on the wavelength of the incident light
However, the longer the wavelength of the incident light, the larger the diffraction angle.
Then, design based on blue light with a short wavelength, for example
In other words, when blue light is incident, the diffraction angle θ during exposure
₂Is diffracted according to
Furthermore, the diffraction angle becomes large.

Further, when the altitude decreases with the season or with time, if the vanes are rotated so that the incident angle of sunlight on the hologram sheet becomes constant,
As shown in the embodiment, the diffracted light further moves away from the horizontal direction.

Since the inclination of the blade plate (angle α with the horizontal line H) increases the incident angle θ _{1 of the} sun, the reflectance increases. Therefore, the inclination should be at least 50 ° or less, preferably 20 ° or less. Good.

However, if the antireflection layer is provided on the surface of the vane plate on the sun side (outdoor side), the incident angle θ ₁ can be increased to about 75 °. Even if the daylighting louver is used alone, the above effect can be obtained. However, when it is used as a double-layered glass by incorporating it between two transparent glass plates such as plate glass, the louver will not be contaminated. Not only does it prevent the angle of the blades from changing due to touching or blowing of wind, but also prevent the adhesion performance between the hologram sheet and the transparent plate from deteriorating due to the effect of moisture. It is also possible to use two sheet glasses or the like with functions such as heat ray reflection, heat ray absorption, ultraviolet ray absorption, visual field selection, and transmittance control (dimming).

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a main part of a multi-layer glass in which a daylighting louver of the present invention is incorporated between two plate glasses, and FIGS.
FIG. 3 is a diagram showing a path of light when sunlight is incident on one blade of the louver of the present invention, FIG. 2 shows a transmission hologram sheet, and FIG. 3 shows a reflection hologram sheet.

Example 1 With reference to FIGS. 1 and 2, regarding a double glazing having a transmission hologram incorporated therein as a louver, in the region near latitude 36 ° north, the south middle altitude (approx. 80 °) φ ₁ When the sun light enters, the bottom of the double glazing is 1 m from the floor, the horizontal distance between the person closest to the double glazing and the double glazing is 2 m, and the highest position (head) of the human body sitting An example will be described in which the direct sunlight is diffracted to the upper part while avoiding the human body closest to the double glazing under the condition of 1.2 m from the floor.

In the hologram, light from a laser light source that oscillates a blue light having a wavelength of 488 nm is divided into two by a light sensitive material such as a photopolymer by an optical system (not shown), and the respective incident angles are 20 ° and −80 from the same direction. It is irradiated with light to form interference fringes, and then subjected to normal development processing to manufacture.

A plurality of sheets obtained by adhering the thus obtained hologram sheet to a transparent resin plate such as polycarbonate or acrylic or a transparent plate such as thin glass is prepared as a vane plate 1, and both ends of each vane plate are prepared. Is rotatably supported by the angle adjusting cords 2 and 2, and the louver 4 supported by the vertical drive cord 3 for vertically moving the blade plate is incorporated in the space portion of the two glass plates 5 and 5 so that the louver 4 can be combined. Layer glass 6 was used.

When the altitude φ _{1 of} the sunlight is incident on such a double glazing 6 as light R ₁ of 80 ° which is the south-middle altitude at latitudes around 36 °, the inclination angle α of the blades is changed. Thirty
When tilted at °, a part of the light of blue wavelength (10% of the light having a diffraction efficiency of 90% for blue light) is transmitted, but most of the light has a diffraction efficiency of 90% for blue light. 90% of the light is diffracted as diffracted light S ₁ as indicated by the solid line, and most of the light with a longer wavelength is diffracted further upward, so it is possible that the human body will not be directly exposed to sunlight. Absent.

When the light R ₂ enters at a low altitude and is incident as the light R ₂ , the vane plate is rotated counterclockwise to the position 1'shown by the dotted line so that the incident angle on the vane plate (hologram sheet) becomes substantially constant. The diffracted light S _{2 at} that time can be guided further upward.

Further, the incident angle with respect to the daylighting louver is set to 5
Since the reflection by the daylighting louvers is suppressed as much as possible at 0 ° or less, most of the light enters the room through the daylighting louvers, and has the effect of making the room brighter.

Example 2 With reference to FIGS. 1 and 3, the design conditions are the same as in Example 1 and the hologram is a reflection type.

The hologram is obtained by splitting light from a laser light source that oscillates a blue light having a wavelength of 488 nm into a light-sensitive material such as a photopolymer by an optical system (not shown) and divides the incident angle from both sides of the light-sensitive material to 0. Light is irradiated at a temperature of 80 ° to form interference fringes, and then a normal development process is performed to manufacture the film.

A plurality of the hologram sheets thus obtained, which were adhered to a transparent plate-like body in the same manner as in Example 1, were prepared as a vane plate 1 to obtain a double-layer glass 6. With respect to such a double glazing 6, the altitude φ _{1 of} the sunlight is latitude 36
In the case of the light R ₁ of 80 ° which is the south-middle altitude of around °, if a tilt angle α of the blade plate is tilted to 10 °, a part of the light of the blue wavelength (the diffraction efficiency for the blue light is increased). 5% if 95%
Light) is transmitted, but most (95% light with a blue light having a diffraction efficiency of 95%) is diffracted as diffracted light S ₁ as indicated by the solid line, and most of the light with a longer wavelength is Since the light is diffracted further upward, the human body is not directly exposed to sunlight.

When the light R ₂ enters at a low altitude and is incident as light R ₂ , the vane plate is rotated to the left to the position 1'shown by the dotted line so that the incident angle on the vane plate (hologram sheet) becomes substantially constant. The diffracted light S _{2 at} that time can be guided further upward.

Further, since the incident angle of sunlight to the daylighting louvers is set to 50 ° or less to suppress the reflection by the daylighting louvers as much as possible, most of the light enters the room through the daylighting louvers, thereby making the room brighter.

Although the preferred examples have been described above, the present invention is not limited to these, and various applications are possible. In the embodiment, the louver is interposed between two plate glasses to form a double-layer glass, but in this case, the plate glass has heat ray reflection, heat ray absorption, ultraviolet ray absorption, visual field selection, and transmittance control (adjustment). It may be used with the function of (light), and may also be used as a single unit of a daylighting louver like an ordinary blind.

Although the vane plate of the daylighting louver may be manually driven, a sensor for detecting the altitude of the sun is provided outdoors and is automatically driven by an electric motor or the like in conjunction with this sensor. You may do it.

The light source for exposing the hologram is preferably blue laser light having a short wavelength, but red and green laser light may be added to this light source to perform multiple exposure with light of three primary colors.

Further, the application of such a daylighting louver can be applied to a window of a hospital, a window near a showcase, a show window, a greenhouse, etc., in addition to a window of a normal building.

[0027]

INDUSTRIAL APPLICABILITY The present invention is capable of reducing the amount of direct sunlight entering the human body and the like, but is not darkened in the room, and the outside field of view can be sufficiently secured.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a multi-layer glass having a daylighting louver of the present invention built in between two plate glasses.

FIG. 2 is a diagram showing a path of light when sunlight is incident on one vane plate of the louver of the present invention, and shows a case where the vane plate is formed of a transmission hologram sheet.

FIG. 3 is a diagram showing a path of light when sunlight is incident on one blade of the louver of the present invention, and shows a case where the blade is formed of a reflection hologram sheet.

[Explanation of symbols]

 1 Blade plate 2, 2 Angle adjustment string 3 Vertical drive string 4 Daylighting louver 5, 5 Plate glass 6 Multi-layer glass

Claims (3)

[Claims] 1. A daylighting louver characterized in that a plurality of horizontally elongated vane plates, each having a hologram sheet laminated on a transparent plate, are rotatably disposed. 2. A daylighting louver according to claim 1, wherein the plurality of blades are provided between two transparent plate-like bodies. 3. The daylighting according to claim 1, wherein the hologram diffracts sunlight into the interior of the room or the ceiling so that the sunlight is taken out of an area where it is not desirable to be directly irradiated with sunlight. louver