JP2015097169A - Optical duct including rainbow pattern generating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide indoor emitted light having a decorative high added value like brightness and a rainbow pattern, by generating chromatic dispersion light to be the rainbow pattern from outdoor natural light taken into an optical duct, and discharging the light to a building inside.SOLUTION: A prism sheet 5 for generating chromatic dispersion light is provided on part of an optical path from a light-collecting portion 3a to a light-discharging portion 3c of a vertical mold optical duct 3 so as to output natural light emitted into the light-collecting portion 3a from the light-discharging portion 3c to an indoor space area 1, as the chromatic dispersion light according to the difference of a wave length. The light emitting side or light discharging side of the prism sheet 5 is provided with a louver 7 for adjusting the propagation direction of the natural light.

Description

  The present invention disperses the natural light incident on the daylighting unit according to the difference in wavelength, so that the incident natural light is divided into a plurality of wavelength components (monochromatic light) so that the color dispersed light is separated from the light emitting unit. The present invention relates to an optical duct having a rainbow pattern generation function that outputs to an indoor space.

  In particular, the present invention relates to an optical duct provided with a light dispersion sheet as a means for dispersing natural light into monochromatic light corresponding to a difference in wavelength in a part of an optical path in an internal space region (for example, an emission part or a lighting part).

As a light dispersion sheet, for each wavelength of light,
・ Prism type sheets using different refractive index and refraction angle ・ Diffraction grating type sheets using different diffraction directions of strong interference are used.

  Conventionally, it has been widely practiced to arrange optical ducts in buildings such as houses, condominiums, and buildings, and to actively send natural light collected from roofs and walls to the inside of the building.

International Publication No. 2009/008159

  Thus, the light duct has excellent convenience as a means for taking in the natural light into the building where there is no window and natural light from the outside does not reach.

  On the other hand, no consideration has been given to the addition of a function to send color-dispersed light in a color-coded form to the visible light component in natural light taken from the light duct.

  Therefore, in the present invention, by providing a light dispersion sheet (prism sheet, diffraction grating sheet) in the light emitting part or the daylighting part of the light duct, the color dispersion light that becomes a rainbow pattern from the outdoor natural light taken into the light duct. Was generated and emitted into the building.

  The present invention realizes an optical duct that can provide decorative added-value indoor outgoing light such as “brightness + rainbow pattern” by emitting light in a form including color dispersion light from the light emitting part to the inside of the building. The purpose is to make it easier.

The present invention solves the above problems as follows.
(1) Color-dispersed light obtained by dispersing natural light incident on a daylighting unit (for example, later-described daylighting units 2a and 3a) according to a difference in wavelength is used as a light emitting unit (for example, later-described light emitting units 2c, 2d, 2e, 2f, 3c) is an optical duct (for example, a horizontal light duct 2, a vertical light duct 3 described later) that outputs to an indoor space area (for example, an indoor space area 1 described later),
A light dispersion sheet (for example, a prism sheet 5 and a diffraction grating sheet 6 described later) for generating the chromatic dispersion light is provided in a part of an optical path from the light collecting unit to the light emitting unit.
The thing of a structure aspect is used.
(2) In (1) above,
The light dispersion sheet is
It is a prism type light dispersion sheet (for example, prism sheet 5 described later) using the difference in refractive index depending on the wavelength.
The thing of a structure aspect is used.
(3) In (1) above,
The light dispersion sheet is
It is a diffraction grating type light dispersion sheet (for example, a diffraction grating sheet 6 to be described later) utilizing the difference in diffraction direction of strong interference due to the wavelength.
The thing of a structure aspect is used.
(4) In the above (1), (2), (3),
On the light incident side or light emitting side of the light dispersion sheet,
Provided a louver (for example, louver 7 described later) for adjusting the propagation direction of the natural light,
The thing of a structure aspect is used.

  An optical duct having a rainbow pattern generation function configured as described above is an object of the present invention.

  The present invention solves the above problem by emitting light in a form including chromatic dispersion light from the light emitting part of the light duct to the inside of the building, that is, indoors with high decorative added value such as “brightness + rainbow pattern”. Outgoing light can be provided.

It is explanatory drawing which shows the vertical optical duct provided with the rainbow pattern production | generation function. It is explanatory drawing which shows the horizontal type | mold optical duct provided with the rainbow pattern production | generation function. It is explanatory drawing which shows the output side rainbow pattern production | generation area | region set to the light emission part of a vertical light duct and a horizontal light duct. It is explanatory drawing which shows the incident side rainbow pattern production | generation area | region set to the lighting part of a horizontal type | mold light duct. It is explanatory drawing which shows the louver arrangement | positioning state when seeing the output side rainbow pattern production | generation area | region of FIG. 3 from the upper side. It is explanatory drawing which shows the louver installation to a light emission part, (a) shows the state by which the direction of the incident light to the prism sheet under it is narrowed down by louver installation, (b) is the wing provided in the louver The board is shown. It is explanatory drawing which shows the variation example of a louver, (a) shows the cross-sectional shape of the louver using the "<"-shaped slat, (b) shows the cross-sectional shape of the louver using the arc-shaped slat. (C) shows the cross-sectional shape of the louver in which the entire flat blades are aligned in an arc. It is explanatory drawing which shows a prism sheet, (a) shows the perspective state of a prism surface, (b) has shown the cross-sectional shape in the arrow direction of (a). It is explanatory drawing which shows a diffraction grating sheet | seat, (a) shows the perspective state of the diffraction grating surface, (b) has shown the cross-sectional shape in the arrow direction of (a). It is explanatory drawing which shows the verification example of the rainbow pattern generation | occurrence | production at about 16:00 on August 30, 2013 in a horizontal light duct, (a) shows the rainbow pattern produced in the indoor space area and its wall surface, (b) The wall rainbow pattern of (a) is mainly shown. It is explanatory drawing which shows the verification example of the rainbow pattern generation | occurrence | production at about 10:00 on August 30, 2013 in a horizontal type | mold light duct, (a) shows the rainbow pattern produced in the indoor space area, its wall surface, and the floor surface, b) Mainly shows the wall rainbow pattern of (a).

  In addition, the color photograph which becomes the basis of the verification example drawings of FIG. 10 and FIG. 11 will be submitted separately as reference material.

  The form for implementing this invention is demonstrated using FIGS. 1-11.

  The constituent elements (for example, the daylighting section 2a) of the reference numeral “number + alphabet” used in FIGS. 1 to 11 are in principle part of the constituent elements (for example, the horizontal light duct 2) of the reference numeral. Is shown.

1 to 11,
1 is an indoor space area such as a house or a building that is irradiated with “rainbow pattern” color dispersion light that is dispersed along with the natural light incident on the light duct.
2 is a horizontal light duct having an inner surface with a specular specification and emitting incident natural light from the outside to the indoor space area 1;
3 is a vertical light duct having an inner surface with a specular specification and emitting incident natural light from the outside to the indoor space area 1;
2a and 3a are natural light incident daylighting portions of the horizontal light duct 2 and the vertical light duct 3,
2b and 3b are light guide sections that follow the output side of the daylighting sections 2a and 3a,
2c, 2d, 2e, 2f, and 3c are light emitting portions for emitting the propagation natural light of the light guide portions 2b and 3b to the indoor space area 1, respectively.
Respectively.

Also,
4 is an acrylic or glass transparent plate fixed to the light emitting portions 2c, 2d, 2e, 2f, 3c,
5 is a prism sheet that is placed on the upper surface of the transparent plate 4 on the light incident side to generate a “rainbow pattern” made of chromatic dispersion light corresponding to the wavelength of incident natural light;
5a is the upper plane of the prism sheet,
5b is a prism surface formed on the opposite side of the plane 5a on the opposite side of the plane 5a, in the form of a triangular cross section extending in the direction of parallel straight lines, with a pair of peaks and valleys continuing in the transverse direction,
Respectively. In addition, in a light emitting part where the prism sheet 5 is not provided, that is, a “rainbow pattern” is not generated, a diffusing plate made of acrylic or glass is used instead of the transparent plate 4.

Also,
6 is a diffraction grating sheet for generating a “rainbow pattern” made of chromatic dispersion light similar to the prism sheet 5;
6a is a plane on one side (upper side) of the diffraction grating sheet,
6b is a diffraction grating surface on the opposite side to the plane 6a,
6c is a groove-like portion formed on the diffraction grating surface 6b in a transverse cross-sectional shape extending in the direction of parallel straight lines,
6d is an inter-groove plane in the direction of parallel straight lines set between adjacent groove portions 6c,
Respectively.

Also,
7 is a louver that is fixed to the inner surface portion of the optical duct so as to be positioned on the light incident side of the prism sheet 5 or the diffraction grating sheet 6, and reduces variations in the direction of incident light on the prism sheet.
7a is a plurality of elongated slats that are assembled parallel to each other, and light travels through the gaps.
7b is a framework for fixing a plurality of elongated slats in a parallel and substantially vertical state,
Respectively.

Also,
R1 is a rainbow pattern observed on the wall surface of the indoor space area 1 when the horizontal light duct 2 is installed,
R2 is a rainbow pattern observed on the floor surface of the indoor space area 1 when the horizontal light duct 2 is installed,
R3 is a rainbow pattern observed on the floor surface of the indoor space area 1 when the vertical light duct 3 is installed,
R4 is a rainbow pattern on the wall surface in the verification example of FIG.
R5 is a rainbow pattern on the wall surface in the verification example of FIG.
R6 is a rainbow pattern on the floor in the verification example of FIG.
α is the inclination of the daylighting unit 2a with respect to a horizontal plane such as the ceiling of the indoor space (see FIG. 4),
Respectively.

  In the following description, the combination of “transparent plate 4 + prism sheet 5 (or diffraction grating sheet 6) + louver 7” is referred to as a light emission side color dispersion set, and “transparent plate 4 + prism sheet 5 (or The combination of “diffraction grating sheet 6)” is called a daylighting side color dispersion set.

The basic features of the illustrated horizontal light duct 2 and vertical light duct 3 are as follows:
(11) Prism sheet 5 or diffraction grating sheet for generating a “rainbow pattern” as chromatic dispersion light of incident natural light on each of the light emitting portions 2c, 2d, 2e, 2f, 3c or the daylighting portions 2a, 3a 6 is arranged,
(12) Furthermore, a louver 7 is provided on the light incident side of the prism sheet 5 or the diffraction grating sheet 6 to reduce variations in the direction of incident light on the prism sheet.
That is.

  In this way, in the indoor space area 1, the natural light incident on the light duct includes a rainbow pattern in which the wavelength component is color-dispersed, so to speak, the light emitting portions 2 c, 2 d, 2 c, 2 d, The light is emitted from 2e, 2f, 3c.

  Due to the emission of chromatic dispersion light from the light emitting part, clear rainbow patterns R4 and R5 as shown in FIGS. 10 and 11 are projected onto, for example, the wall surface of the indoor space area 1. In the verification example of FIG. 11, a slightly rainbow pattern R6 was observed on the floor surface.

  FIG. 1 shows that a rainbow pattern is generated on the wall surface and floor surface of the indoor space area 1 when the horizontal light duct 2 is used.

  FIG. 2 shows that a rainbow pattern is generated on the floor surface of the indoor space area 1 when the vertical light duct 3 is used. This vertical light duct is provided between the roof of the three-story building (lighting part 3a) and the ceiling part (light-emitting part 3c) of the first floor.

  The horizontal light duct 2 has a total of four light emitting portions 2c, 2d, 2e, 2f, and a light emission side color dispersion set can be selectively set in each of the light emitting portions.

  The rainbow pattern generation location in the indoor space 1 can be selected by selectively setting the emission side chromatic dispersion set in each of these emission sections 2c, 2d, 2e, and 2f.

  Conversely, when a daylighting color dispersion set is set in the daylighting part 2a of the horizontal light duct 2, an indoor space is formed from each of the light emission parts 2c, 2d, 2e, and 2f regardless of the presence or absence of the light emission side color dispersion set. In the area 1, “rainbow pattern” color dispersion light based on the daylighting side color dispersion set is emitted.

  A vertical light duct having a shape in which a new light emission part 3c is provided on a peripheral surface portion of a different vertical position (for example, different floor) of the vertical light duct 3 of FIG. 2 is also used.

  In the case of the vertical light duct provided with the plurality of light emitting parts, the light emitting side color dispersion set can be selectively set to each light emitting part as in the case of the horizontal light duct 2 in FIG. The lighting side color dispersion set can be set to 3a.

  FIG. 3 shows the form of the light emitting portions 2c, 2d, 2e, 2f, 3c (outgoing side rainbow pattern generation region) in the horizontal light duct 2 and the vertical light duct 3 of FIGS.

  FIG. 4 shows the form of the daylighting portion 2a (incident side rainbow pattern generation region) in the horizontal light duct 2 of FIG.

3 and 4,
(21) The transparent plate 4 is fixed to the horizontal light duct 2 and the vertical light duct 3 through a flange (not shown),
(22) The prism sheet 5 and the diffraction grating sheet 6 are attached to the upper surface portion of the transparent plate 4 by pasting, etc.
(23) The louver 7 has a frame 7b of an elongated slat 7a attached to the horizontal optical duct 2 and the vertical optical duct 3 by fixing means such as screwing, riveting, and bonding (see FIG. 3).

  FIG. 6A shows a state in which the light incident direction to the prism sheet 5 and the diffraction grating sheet 6 is narrowed by disposing the louver 7 to the light emitting portions 2c, 2d, 2e, 2f, 3c. .

  A louver 7 disposed on the upstream side of the prism sheet 5 and the diffraction grating sheet 6 directs incident light to the prism sheet and the like.

  This directing action of the louver 7 with respect to the incident light suppresses randomization of the incident direction to the prism sheet 5 or the like of diffused light that is difficult to prevent in the horizontal optical duct 2 and the vertical optical duct 3 on the specular inner surface. ing.

  That is, the incident light to the prism sheet 5 or the like is directed by the louver 7, so that the emitted light from the prism sheet or the like is narrowed down to an optical path in a certain direction that is more aligned than when the louver 7 is not installed.

  As a result, more beautiful rainbow patterns R1, R2, and R3 appear on the floor and wall surfaces of the indoor space area 1.

  Of course, the direction alignment of incident light by the louver 7 is secured in each of the horizontal light duct 2 and the vertical light duct 3.

  As shown in FIG. 7, various types of louvers 7 can be used. For example, the wing plate 7a has a “<” shape or an arc shape (see FIGS. 7 (a) and 7 (b)), or a plurality of flat plate wing plates 7a have an arc shape that protrudes upward as a whole. While aligning, the interval between the slats may be set so that the light exit side is wider than the light entrance side (see FIG. 7C).

  FIG. 8 shows the prism sheet 5 on which incident light is emitted in the form of wavelength-dispersed chromatic dispersion light (rainbow pattern).

  The prism sheet 5 is known per se and comprises a flat surface 5a on one side and a prism surface 5b on the opposite side.

  The prism surface 5b includes a pair of adjacent planes (slopes) that constitute each of a plurality of triangular prism-shaped portions continuously arranged in parallel straight lines.

  Natural light incident on the flat surface 5a of the prism sheet 5 disposed in the light emitting portions 2c, 2d, 2e, 2f, and 3c is refracted by each of the flat surface and the one prism surface 5b, and is indoors from the one prism surface. The light is emitted into the space 1.

  The natural light incident on the flat surface 5a of the prism sheet 5 disposed in the daylighting portions 2a and 3a is also refracted in the same manner as the incident light to the light emitting portion and is emitted from the prism surface 5b to the light guide portions 2b and 3b. To do.

  Since the natural light incident on the prism sheet 5 of the light emitting part and the daylighting part has a different refractive index for each wavelength, it is emitted to the indoor space 1 and the light guide parts 2b and 3b in the form of chromatic dispersion light. To do.

  This color dispersion light is finally projected as a rainbow pattern R1, R2, R3 on the wall surface or floor surface of the indoor space area 1.

  FIG. 9 shows a diffraction grating sheet 6 from which incident natural light is emitted in the form of chromatic dispersion light (rainbow pattern) corresponding to the wavelength.

  The diffraction grating sheet 6 is known per se and comprises one flat surface 6a and a diffraction grating surface 6b on the opposite side.

  The diffraction grating surface 6b has a plurality of parallel straight and jumping groove-like portions 6c and an inter-groove plane 6d continuous in the parallel linear direction therebetween.

Of the natural light incident on the plane 6a of the diffraction grating sheet 6,
(31) The incident light traveling to the groove 6c is irregularly reflected and refracted in various directions in the groove,
(32) The incident light traveling to the inter-groove plane 6d is refracted in a state corresponding to the wavelength when passing through the inside of the diffraction grating sheet 6 in the linear direction and exiting from the inter-groove plane.

  As is well known, chromatic dispersion light as interference fringes due to strengthening of color components for the same wavelength is observed by the diffraction / interference action of each of the refracted light beams from the adjacent inter-groove planes 6d.

  That is, as in the case of the prism sheet 5 described above, the color dispersion of incident natural light on the light emitting portions 2c, 2d, 2e, 2f, 3c and the diffraction grating sheets 6 disposed in the daylighting portions 2a, 3a. Light is emitted.

  The chromatic dispersion light from the diffraction grating sheet 6 is projected as a rainbow pattern on the wall surface and floor surface of the indoor space area 1 as in the prism sheet 5.

in this way,
(41) In the horizontal light duct 2 and the vertical light duct 3 using the prism sheet 5, chromatic dispersion light is generated by utilizing the fact that the refractive index differs depending on the wavelength of incident natural light,
(42) In the horizontal light duct 2 and the vertical light duct 3 using the diffraction grating sheet 6, chromatic dispersion light is generated by utilizing the interference action for each wavelength after the diffraction of incident natural light.

  The verification example of FIGS. 10 and 11 uses the horizontal light duct 2 in the horizontal state of FIG. 1 and the light emission side of “transparent plate 4 + prism sheet 5 + louver 7” only on the light emission part 2c closest to the daylighting part 2a. The rainbow pattern state of the indoor space area 1 when the color dispersion set is disposed is shown.

This verification experiment
(51) A daylighting side color dispersion set is not arranged in the daylighting unit 2a,
(52) As a horizontal optical duct 2 in a horizontal state,
The inclination α of the daylighting unit 2a is 20 degrees (see FIG. 4)
-Square shape with the opening surface of the daylighting part 2a being "24cm x 14cm"-The length of the light guide part 2b from the daylighting part 2a to the light emission part 2c is 62cm
-The total length of the light guide 2b is 140cm
-Using a light duct having a square shape with a cross-section of the light guide portion 2b of "22.5cm x 5cm" and a square shape with an opening surface of the light emission portion 2c of "22.5cm x 6cm"
(53) As the prism sheet 5 of the light emitting part 2c, "SOLF" of Sumitomo 3M Limited is used,
(54) The louver 7 has a shape in which rectangular blades 7a having a planar shape of “60 mm × 10 mm” and a thickness of 0.5 mm are arranged in parallel at 5 mm intervals in the direction of the light guide portion 2b ( FIG. 6),
It is done in the environment.

  As a diffraction grating sheet 6 in place of the prism sheet 5, “PN” manufactured by Edka Industries Co., Ltd. is used.

In the verification example of FIG. 10, a clear rainbow pattern R4 is projected on the wall surface of the indoor space area 1.
In the verification example of FIG. 11, a clear rainbow pattern R5 is clearly projected on the wall surface of the indoor space area 1, and some rainbow pattern R6 is projected on the floor surface of the indoor space area 1.

  As described above, the color photographs (reference materials) of the verification examples in FIGS. 10 and 11 are submitted separately.

Of course, the light duct provided with the rainbow pattern generation function of the present invention is not limited to the above embodiment, for example,
(61) Various products other than the above are adopted as the prism sheet 5 and the diffraction grating sheet 6 for generating the rainbow pattern.
(62) The numerical values of the various components described above are merely examples, and values appropriately changed are used instead of the above values.
(63) The prism sheet 5 and the diffraction grating sheet 6 are connected to any one of the optical paths of the horizontal light duct 2 and the vertical light duct 3 other than the daylighting sections 2a and 3a and the light emitting sections 2c, 2d, 2e, 2f and 3c. Arranged in the part,
(64) The prism sheet 5 and the diffraction grating sheet 6 are arranged upside down (upside down).
(65) The louver 7 is disposed below the prism sheet 5 and the diffraction grating sheet 6;
(66) The direction of the louver 7 is set to a state rotated by an arbitrary angle from that of FIG. 5, for example, the parallel linear direction of the prism surface 5b of the prism sheet 5 or the parallel of the groove-like portion 6c of the diffraction grating sheet 6. Set in the direction orthogonal to the linear direction,
(67) The louver 7 is set so that the entire slat 7a is assembled in a vertical and horizontal grid pattern.
You may do it.

1: Indoor space area 2: Horizontal light duct 3: Vertical light duct 2a, 3a: Daylighting part 2b, 3b: Light guide part 2c, 2d, 2e, 2f, 3c: Light emitting part 4: Transparent plate 5: Prism sheet 5a: plane 5b: prism surface 6: diffraction grating sheet 6a: plane 6b: diffraction grating surface 6c: groove-shaped portion 6d: inter-groove plane 7: louver 7a: slat 7b: framework

R1: Rainbow pattern observed on the wall surface of the indoor space area when the horizontal light duct is installed R2: Rainbow pattern observed on the floor surface of the indoor space area when the horizontal light duct is installed R3: Vertical light Rainbow pattern R4 observed on the floor surface in the indoor space when the duct is installed: Rainbow pattern R5 on the wall surface in the verification example of FIG. 10: Rainbow pattern R6 on the wall surface in the verification example of FIG. 11: Verification example of FIG. Rainbow pattern α on the floor surface of the floor: inclination of the daylighting section with respect to the horizontal plane (see FIG. 4)

Claims (4)

A light duct that outputs chromatic dispersion light, in which natural light incident on a daylighting unit is dispersed according to a difference in wavelength, from a light emitting unit to an indoor space area,
A light dispersion sheet for generating the color dispersion light is provided in a part of an optical path from the daylighting unit to the light emission unit.
An optical duct with a rainbow pattern generation function. The light dispersion sheet is
It is a prism-type light dispersion sheet using the difference in refractive index due to the wavelength,
An optical duct having a rainbow pattern generation function according to claim 1. The light dispersion sheet is
A diffraction grating type light dispersion sheet utilizing the difference in diffraction direction of strong interference due to the wavelength,
An optical duct having a rainbow pattern generation function according to claim 1. On the light incident side or light emitting side of the light dispersion sheet,
Provided a louver for adjusting the propagation direction of the natural light,
An optical duct having a rainbow pattern generation function according to any one of claims 1 to 3.