JPS61267003A - Control member for transmitted light - Google Patents

Abstract

PURPOSE:To control the quantity, directivity, diffusivity and convergence of transmitted light in any direction by interposing an optical rectifying member in a light transmissive member in one body and forming lens type curved surfaces at one-terminal sides of all or some of plural optical rectifying elements. CONSTITUTION:Hexagonal optical rectifying elements 1a which have axial length are coupled by a material through which light is hardly transmitted to form the optical honeycomb rectifying member 1, which is embedded in the light transmissive material 2 in one body so that the axial direction of hexagonal parts of the optical rectifying elements 1a is perpendicular to the surface of the light transmissive material 2. Light which is incident slantingly is cut off by the optical rectifying elements 1a. The respective optical rectifying elements 1a cross the surfaces of the light transmissive material 2 at right angles and light transmitted through the light transmissive material 2 is limited to light incident on the surface of the light transmissive material 2 at right angles; and light when projected out of a recessed part 2a is refracted at the recessed part 2a and diffused widely. Consequently, the directivity of incident light is controlled to control the quantity of transmitted light.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transmitted light control member that can freely control the amount and directionality of transmitted light, as well as diffusivity, light convergence, and the like.

(Prior Art and its Problems) A polarizing plate formed with parallel slits at minute intervals has conventionally been used as a member for controlling the amount, directionality, etc. of transmitted light.

However, since this polarizing plate is formed only of parallel slits at minute intervals, two polarizing plates are required to control the amount of transmitted light. That is, it was necessary to provide two polarizing plates parallel to the optical axis direction, rotate each polarizing plate relatively around the optical axis, and form each slit so as to be parallel or perpendicular to each other.

In addition, the parallel slit group can block only light beams that are perpendicular to these, but cannot block light beams that are parallel to these.

In addition, in order to manufacture a polarizing plate, transparent material sheets and non-transparent material sheets are laminated alternately, and they are compressed and brought into close contact to integrate them, and then thinly layered in a direction orthogonal to the 8i layer direction. It is necessary to slice the polarizing plate, making it difficult to freely change the size of the polarizing plate. Furthermore, there are many manufacturing steps, the management of which is complicated, and the polarizing plate is also expensive.

[Purpose of the invention]

The present invention has been made in view of these points, and it is possible to freely control the light amount, directionality, diffusivity, and light convergence of transmitted light in all directions, and it is easy to manufacture.
It is an object of the present invention to provide a transmitted light control member that can be freely changed in size and shape, has high strength, and is inexpensive.

[Summary of the invention]

The transmitted light control member of the present invention comprises a plurality of light rectifying elements formed in an annular shape substantially parallel to one optical axis direction and made of a material through which light does not easily pass, and connected in a direction intersecting the one optical axis direction. It is characterized in that the rectifying member is integrally contained within the light-transmitting material, and a lens-shaped curved surface is formed at at least one end of all or some of the plurality of light rectifying elements.

[Embodiments of the invention]

The present invention will be described below with reference to embodiments shown in FIGS. 1 to 6.

1 and 2 show one embodiment of the invention.

In this embodiment, a honeycomb-shaped light rectifying member 1 is formed integrally within a transparent material 2. As shown in FIG.

To explain further, the light rectifying member 1 is made of a material that does not easily transmit light in order to perform light rectification. Materials that do not allow light to pass through include those that do not allow any light to pass through, such as metals, paper, ceramics, and synthetic resins, as well as those that allow some light to pass through, and those that have inferior translucency compared to translucent materials. I'm here. Therefore, for materials that do not allow light to pass through,
This includes opaque, translucent, transparent, and colored materials.

Further, the light-transmitting material 2 is made of acrylic resin, polyester resin, or other transparent resin material, and is further formed into a concave lens shape at one end of each light rectifying element 1a, that is, at the top surface in FIG. There is.

When manufacturing this transmitted light control member, the light rectifying member 1 is formed in advance into a honeycomb shape by connecting hexagonal light rectifying elements 1a having a plurality of axial lengths using a material that does not easily transmit light. It is loaded into a resin injection mold (not shown), and then a translucent material 2 made of, for example, liquid acrylic resin is injected into the resin injection mold, the acrylic resin is cured, and at the same time each light rectifying element 1a is The concave portion 2a is formed in one end, that is, the upper surface in FIG. 2, and then the mold is released. As a result, the light rectifying member 1 is integrally embedded in the transparent material 2.

In this embodiment, the transparent material 2 has a thickness of, for example, 5xt.
The light rectifying element 1a is embedded in a flat plate shape with the hexagonal portion of the light rectifying element 1a perpendicular to the surface of the light-transmitting material 2, that is, parallel to the normal direction to the surface.

Next, transmitted light control in this embodiment will be explained with reference to FIG.

As shown in the figure, the light enters from the flat part, and the concave part 2
Let it be radiated from a. In this embodiment, as shown in FIG. 2, light obliquely incident on each light rectifying element 1a of the light rectifying member 1 is blocked by the material of the light rectifying element 1a through which light does not easily pass. In this embodiment, each annular light rectifying element 1a of the light rectifying member 1 is perpendicular to the surface of the light-transmitting material 2, so that the light passing through the light-transmitting material 2 is It is limited to only incident light that is incident at right angles to the surface of the material 2. When the light exits from the recessed part 2a, the light is refracted at the recessed part 2a and widely diffused. In this way, the incident light is rectified into parallel beams by the light rectifying member 1, and then diffused by the recessed portion 2a. Further, by adjusting the angle of the transmitted light control member itself with respect to the incident light, the directionality of the incident light can be controlled, and the amount of transmitted light can also be controlled.

Taking advantage of this property, if the transmitted light control member of this embodiment is installed in front of a point light source such as an electronic sign board, with its flat portion facing each other and the recessed portion 2a facing outward, the transmitted light control member can be placed opposite the light rectifying element 1a. Only the light emitted from the light source is allowed to enter the transmitted light control member and then diffused from the front surface, making it possible to provide a clear electrical display.

Further, as shown in FIG. 3, if recesses 2a are formed at both ends of the optical rectifying element 1a, the light diffusion state will be further improved.

This also increases the design effect.

Further, as shown in FIG. 4, the annular light rectifying element 1a of the light rectifying member 1 may be embedded so as to be inclined at a constant angle θ with respect to the surface of the transparent material 2.

As a result, the light rectifying element 1a transmits only the light that is inclined at an angle θ with respect to the surface, and then the recessed part 2a
It is diffused in Therefore, when used as a standing wall, it exhibits a blind effect.

Alternatively, the end face of the light rectifying element 1a may be formed into a convex surface in the shape of a convex lens to exert a light condensing effect and control transmitted light. Alternatively, one side may be a concave surface and the other side may be a convex surface.

Note that the shape of the light rectifying element 1a may be any shape as long as it is formed in an annular shape substantially parallel to one optical axis direction, and in addition to the honeycomb shape of the above embodiment, a circular shape as shown in FIG. 5(a) may be used. , it can be formed in an S-shape as shown in FIG. 3(b), or in a lattice shape as shown in FIG. 1(c).

Furthermore, as shown in FIGS. 6(a) and 6(b), the light rectifying member 1
By utilizing the good workability of the light-transmitting material, the entire structure can be easily formed into various shapes such as curved or bent.

As described above, the transmitted light control member of the present invention can effectively and reliably exhibit light rectification and light shielding properties for light beams in all directions, and at the same time can diffuse and condense transmitted light. Further, the degree of light rectification and light shielding can be easily adjusted by changing and combining the axial length and cross-sectional shape of each light rectifier element depending on the purpose of use. Further, since the light rectifying member 1 is integrally contained in the light-transmitting material 2, the strength is high, and the light-transmitting material has excellent weather resistance. In addition, it can be manufactured by simply injecting the transparent material 2 into the light rectifying member 1, which has been manufactured in advance according to the purpose of use, and is easy to manufacture, and its size, shape, etc. can be changed freely. I can do it.

The transmitted light control member of the present invention can be used in a wide range of applications by utilizing the above-mentioned property of freely and easily controlling the amount of transmitted light, controlling direction, controlling diffusion, and controlling light concentration. For example, it can be used as a filter for light control, a display, a decorative wall member or panel member for buildings, and a condensing lens plate.

〔Effect of the invention〕

In this way, the transmitted light control member of the present invention can freely control the light intensity, directionality, diffusivity, and light convergence of transmitted light in all directions, is easy to manufacture, and has a small size. In addition, the shape can be changed freely, the strength is high, the cost is low, and it has a wide range of uses.

[Brief explanation of drawings]

The drawings show an embodiment of the transmitted light control member of the present invention, and FIG. 1 is a plan view of one embodiment, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIGS. 3 and 4. The figures are cross-sectional views showing other embodiments, FIGS. 5(a), (b), and (c) are plan views showing modified examples of the optical rectifying element, and FIGS. 6(a) and (b) are further sectional views showing other embodiments. FIG. 1... Light rectifying member, 1a... Light rectifying element, 2...
Translucent material.

Claims (1)

[Scope of Claims] 1) A light rectifier in which a plurality of light rectifying elements formed in an annular shape substantially parallel to one optical axis direction and made of a material through which light does not pass are connected in a direction intersecting the one optical axis direction. 1. A transmitted light control member, characterized in that the member is integrally contained in a light-transmitting material, and a lens-shaped curved surface is formed at at least one end of all or some of the plurality of light rectifying elements. 2) The entire transmitted light control member is formed into a flat plate shape, and the axial direction of each light rectifying element of the light rectifying member included in the transparent material is set to the normal to the surface of the flat transmitted light control member. 2. The transmitted light control member according to claim 1, wherein the transmitted light control member is formed parallel to or inclined to. 3) The transmitted light control member according to claim 1 or 2, wherein the light rectifying member is formed in a honeycomb shape.