JPH0289019A - Rainbow generator - Google Patents

Abstract

PURPOSE:To miniaturize the title rainbow generator and to reduce a cost by using a single prism. CONSTITUTION:The rainbow generator is constituted of a light conductor 1 and a prism 3, and the light conductor 1 transfers a white light from a light source and a light beam is emitted from a light emitting end 2. As for the prism 3, its cross section is roughly a regular triangle, the end face holds a second apex angle B of the prism and the surface facing the apex angle B, respectively by a prism apex angle holding plate 33 and a prism holding plate 32 which are fixed to both side plates 31, both side plates 31 are fixed to a fitting plate 34, and the fitting plate 34 is provided fixedly on the fitting plate 53 of a stand 5 and fixed to the stand 5. A white light transferred to the light conductor 1 is radiated to a second apex angle B from the first apex angle A of the prism from the light emitting end 2, and a visible light which is made incident on the inside of the prism 3 is separated into spectral components in the prism 3, and a rainbow in which the upper part is red and the lower part is blue is emitted from a third apex angle C. In such a manner, the rainbow generator being simple and small in size, and also, inexpensive is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a rainbow generating device, more specifically, a rainbow generating device, more specifically, a decorative artificial rainbow that can be placed at any desired location, such as inside a building or other places with fountains or trees. The present invention relates to a device for generating.

Jomefuse: Modern buildings have been designed to provide places for relaxation, such as by installing fountains with decorative trees planted inside the buildings. In particular, hotels and the like are installing these facilities in their lobbies and gardens to improve the atmosphere. However, no matter how ingenious they are, there are limits to how much they can be used; they are all very similar, and there is no innovation that will attract the public's attention.

In view of the above-mentioned circumstances, the present applicant first developed a rainbow generating device that can artificially generate rainbows to further improve the atmosphere of hotel and building lobbies and provide a more enjoyable place to relax. I proposed about.

FIG. 4 is a configuration diagram for explaining an example of a rainbow generating device previously proposed by the present applicant. In the figure, 1 indicates sunlight or artificial light with a spectral component exhibiting white light, etc., which is focused by a lens. , a light guide through which the white light is transmitted; 2 is a lens disposed opposite to the light emitting end of the guide body 1; and 3 is a lens for converting the light emitted from the light emitting end into parallel light beams; An elongated prism for receiving and separating the parallel light beams from the lens 2. In the illustrated example, a large number of light guides 1 are arranged in a row, and the charge and discharge of the light guides arranged in this row is Elongated cylindrical lenses 2 are arranged opposite to the end rows, and elongated prisms 3 are arranged opposite to the elongated cylindrical lenses 2. Of course, this prism 3 may be a single prism, but as shown in the figure, a large number of prisms 3 may be stacked one on top of the other. The parallel lines from the cylindrical lens 2 are separated by the prism 3 arranged as described above, and the upper side becomes red (R) component light with a long wavelength, and the lower side becomes light with a short wavelength blue component (B
) component light, and the light in the middle is refracted according to each wavelength, forming a rainbow with red at the top and blue at the bottom, but this rainbow is divided into multiple rainbows depending on the distance from the prism 3. It is very varied and visually pleasing, as they sometimes appear to overlap.

FIG. 5 is a block diagram showing another example of the rainbow generating device previously proposed by the present applicant. In the figure, parts having the same function as those in FIG. It is numbered. In this example, the first light guide cable 1 is used as a light source, and a single circular lens 2 and a prism 3 formed in a substantially circular shape are used in conjunction with the first optical conductor cable 1. 3, a large number of prisms 3 are stacked in multiple stages as shown in the figure.

A prism having a circular shape as a whole or a single prism having a circular outer shape may be used. Therefore, according to this example, the optical conductor cable 1, the lens 2, the prism 3, etc. The arrangement is much easier, and the completed rainbow is approximately circular, creating an interesting rainbow. but,
In the above-mentioned rainbow generating device, the light emitted from the light guide is not directly projected onto the prism 3, but is converted into parallel light beams using a cylindrical lens or a circular lens before passing through the prism 3.
Because the light is projected onto the rainbow, the rainbow generator becomes large.

Another problem was that it was expensive.

The present invention has been made in view of the above-mentioned circumstances, and
The object of this invention is to provide a rainbow generating device that can project a rainbow using a single prism without using a cylindrical lens or a circular lens.

Figure 1 is a diagram showing the configuration of an embodiment of the rainbow generating device according to the present invention, and Figure 2 is a plan view of the prism mounting section in Figure 1. Inside, 1 is a light guide, and 3 is a prism. The light guide 1 transmits white light from a light source (not shown), and is emitted from a light emitting end 2. The light guide 1 is held at the light emitting end 2 by a holding fitting 4 . The holding fitting 4
is fixed to the stand 5 via a support plate 7 so as to be movable and rotatable. That is, the support plate 7 has a rectangular shape with slots 71 bored in the longitudinal direction, and can slide in the slots 71, rotate, and when the light emitting end 2 reaches a predetermined direction and position, the stand 5 is tightened with a set screw 72. will be permanently installed. 41
A stopper is used to rotatably fix the support plate 7 and the holding metal fitting, and increases the degree of freedom in setting the position of the light emitting end. As shown in the figure, the prism 3 has a substantially equilateral triangular cross section, and the prism apex angle B and the apex angle B of the prism are controlled by a prism apex angle presser plate 33 and a prism apex angle presser plate 32 fixed to both side plates 31 at the end face. The two side plates 31 are fixed to the mounting plate 34, with the surfaces facing each other being held.

The mounting plate 34 is fixed to the mounting plate 53 of the stand 5 and fixed to the stand 5. The mounting relationship between the prism 3 and the light emitting end 2 is such that the optical axis of the light emitting end 2 is fixedly installed so as to be perpendicular to the first ridge line at the first apex angle A of the prism 3.
The direction of the optical axis is toward the second apex angle B. The base plate 51 of the stand 5 is fixed to the outer casing 6 with screws 52 and stored in the stand 5. A portion of the outer casing 6 that faces the third apex angle C of the prism 3 has an inclined surface, and a transparent plate 61 is inserted into the storage frame 63 of the outer casing 6 on the inclined surface. is fixed to the outer casing 6. In the relationship between the prism 3 and the light emitting end 2, the present applicant has proposed that the white light transmitted to the light guide 1 is transmitted from the light emitting end 2 to the first apex angle A of the prism 3 to the second apex angle B. Prism 3
The visible light that enters the prism 3 is separated into spectra in the third prism 3.
It was confirmed that a rainbow with red at the top and blue at the bottom was emitted from the apex angle C. The emitted rainbow passes through the transparent plate 61 and is illuminated to the outside of the outer casing.

FIG. 3 is a perspective view showing the appearance of the rainbow generating device of the present invention. By arranging a plurality of light emitting ends 2 in parallel, a stronger parallel rainbow can be obtained.

As is clear from the above explanation, according to the present invention, an inexpensive rainbow generating device can be provided using a simple device that does not require a cylindrical lens or a circular lens, and is small in size, making it portable. Since it can be used as a device, it can be used in a wide range of applications.

[Brief explanation of the drawing]

FIG. 1 is a side view of essential parts of an embodiment of the rainbow generating device of the present invention, FIG. 2 is a plan view of the prism installed, and FIG.
FIG. 1 is a perspective view of the external appearance of the embodiment, and FIG. 4.5 is a diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1... Light guide, 2... Light emission end, 3... Prism, A... 1st apex angle, B... 2nd apex angle, C... 3rd...
Vertical angle, 5...stand, 6...outer casing, 61...transparent plate. Diagram

Claims (1)

[Claims] 1. A light guide through which white light is transmitted, and a prism having a substantially equilateral triangular cross section, the light emitting end of the light guide being arranged such that the axis of the light emitting end is orthogonal to the first ridgeline. The visible light of the light guide is projected from a first apex angle including the first ridgeline of the prism toward a second apex angle in the light traveling direction, and spectral light is emitted from a third apex angle. A rainbow generator featuring: