JPH0654025U - Rainbow generator - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rainbow generating device capable of projecting a rainbow using a single prism without using a cylindrical lens or a circular lens. [Structure] An optical conductor cable 1 composed of a plurality of optical conductors through which white light is transmitted, and a prism 3 having a cross section of a substantially equilateral triangle, and white light emitted from a light emitting end of the optical conductor cable 1 , The light is emitted from a first apex angle A including the first ridgeline of the prism 3 toward a second apex angle B in the light traveling direction, and the light is emitted from the third apex angle C to emit a spectrum. The light emitting end of the conductor cable and the prism are arranged.

Description

[Detailed description of the device]

[0001]

【Technical field】

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainbow generating device, and more particularly to a device for generating a decorative artificial rainbow in a building, or any other desired place such as a place with a fountain or a tree.

[0002]

[Prior art]

 In recent buildings, etc., a fountain in which a tree is decoratively planted is installed in the building to provide a place for relaxation. In particular, hotels and other facilities are equipped with these facilities in the lobby and gardens to improve the atmosphere. However, these have limitations even if they are devised, and they are all similar or close to each other, and no novel ones are especially noticeable. In view of the above-mentioned circumstances, the present applicant firstly artificially generates a rainbow to further improve the atmosphere of the lobby of a hotel or building and to provide a more enjoyable place for relaxation. I proposed a device.

FIG. 5 is a block diagram for explaining an example of a rainbow generating device previously proposed by the present applicant. In FIG. 5, reference numeral 101 denotes the sunlight or artificial light of a spectral component that presents white light. The light guide 102 which is focused by and transmits the white light (light including all wavelength components of visible light) is arranged opposite to the light emitting end of the light guide 101, and is emitted from the light emitting end. A lens for converting the collimated light into parallel rays, and 103, an elongated prism for receiving and splitting the parallel rays from the lens 102. In the illustrated example, a large number of optical conductors 101 are arranged in a line. The elongated cylindrical lenses 102 are arranged so as to face the light emitting end rows of the light guides arranged in this row, and the elongated prisms 103 are arranged so as to face the elongated cylindrical lenses 102. There is. This prism 103 may of course be a single prism, but it may also be constructed by stacking a large number of prisms 103 as shown in the drawing. The parallel line from the cylindrical lens 102 is split by the prism 103 arranged as described above, the upper side becomes a red (R) component light with a long wavelength, and the lower side is a blue (B) component with a short wavelength. It becomes light, and the middle is refracted according to each wavelength, forming a rainbow with red on the upper side and blue on the lower side. In this rainbow, many rainbows overlap depending on the distance from the prism 103. It is very varied and fun to look at.

FIG. 6 is a block diagram showing another example of the rainbow generating device previously proposed by the present applicant. In the figure, the same reference numerals as in FIG. Numbered. Thus, in this example, the first light guide cable 101 is used as the light source, and the single circular lens 102 and the prism 103 formed in a substantially circular shape are used in accordance with the first light guide cable 101. As shown in the figure, the prism 103 may be formed by stacking a large number of prisms 103 in multiple stages to form a circular shape, or may be a single prism having a circular outer shape. Therefore, according to this example, the arrangement configuration of the light guide cable 101, the lens 102, the prism 103, etc. becomes very easy, and the rainbow that emerges is also substantially circular, so that an interesting rainbow can be formed. However, in the rainbow generating device, the light emitted from the light guide is not directly projected onto the prism 103, but is converted into parallel rays by a cylindrical lens or a circular lens and then projected onto the prism 103. Therefore, there is a problem that the rainbow generator becomes large and expensive.

[0005]

【Purpose】

 The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a rainbow generating device capable of projecting a rainbow using a single prism without using a cylindrical lens or a circular lens. It was done for the purpose.

[0006]

【Constitution】

 FIG. 1 is a diagram showing a configuration for explaining an embodiment of a rainbow generating device according to the present invention, and FIG. 2 is a plan view of a prism mounting portion of FIG. 1, in which 1 is a plurality of optical conductors. In a bundled optical conductor cable, a lens for concentrating sunlight or artificial light (white light), for example, is provided at each end (not shown) of each optical conductor. Light is being introduced. Reference numeral 3 is a prism, and the light guide cable 1 is composed of a large number of light guides 1a, 1b ... 1g as shown in FIG. 3, and light close to white light is introduced into each light guide through the lens as described above. Although the light is emitted from the emission end 2, the number of the light guide cables may be one, or a plurality of the light guide cables may be arranged in the length direction of the prism.

The light guide cable 1 is held by the holding metal fitting 4 at the light emitting end 2. The holding metal fitting 4 is fixed to a stand 5 via a support plate 7 so as to be movable and rotatable. Immediately, the support plate 7 has a rectangular shape with a slot 71 formed in the longitudinal direction and can slide in the slot 71, rotate, and stop when the light emitting end 2 reaches a predetermined direction and position. It is fixedly mounted on the stand 5. Reference numeral 41 denotes a stopper which rotatably fixes the support plate 7 and the holding metal to increase the degree of freedom in setting the position of the light emitting end.

The prism 3 has a substantially equilateral triangle in cross section as shown in the figure, and the end surface is covered by the prism apex holding plate 33 and the prism holding plate 32 fixed to both side plates 31 and the second apex angle B of the prism and the prism apex. The side plates 31 are respectively fixed to the mounting plate 34 while holding the surfaces facing the apex angle B, and the mounting plate 34 is fixed to the mounting plate 53 of the stand 5 and fixed to the stand 5. The prism 3 and the light emitting end 2 are mounted such that the optical axis of the light emitting end 2 is fixed so that the optical axis of the light emitting end 2 is orthogonal to the first ridgeline at the first apex angle A of the prism 3. Is directed to the second apex angle B. The stand 5 is fixedly mounted on the stand 5 by the base plate 51 of the stand 5, and is fixedly housed in the outer casing 6 by screws 52.

A portion of the outer casing 6 facing the third apex angle C of the prism 3 has an inclined surface, and a light-transmitting plate 61 is inserted into the housing frame 63 of the outer casing 6 on the inclined surface, The holding frame 62 is fixed to the outer casing 6. Regarding the relationship between the prism 3 and the light emitting end 2 described above, the present applicant has found that the white light transmitted to the light guide 1 is from the light emitting end 2 to the first apex angle A to the second apex angle B of the prism 3. Visible light radiated toward the prism 3 and entering the prism 3 is dispersed in the prism 3 and a rainbow is drawn from the third apex angle C that draws an arc with the upper part red and the lower part blue. Was confirmed. The emitted rainbow is illuminated to the outside of the outer casing through the transparent plate 61. Note that FIG. 4 shows an external view of the rainbow generating device of the present invention.

[0010]

【effect】

 As is apparent from the above description, the present invention is based on the discovery that a rainbow can be generated by light emitted from a light guide cable that bundles a plurality of light guides. A light guide cable that uses multiple light guides that does not require a lens can generate a stronger rainbow at a lower cost with a simple device, and it is also compact, making it a portable device. Because it is possible, it can be widely used.

[Brief description of drawings]

FIG. 1 is a side view of essential parts of an embodiment of a rainbow generating device of the present invention.

FIG. 2 is a plan view of a mounted state of a prism.

FIG. 3 is a light emitting end view of a light guide cable.

FIG. 4 is a perspective view of the appearance of the embodiment shown in FIG.

FIG. 5 is a diagram showing a conventional example.

FIG. 6 is a diagram showing a conventional example.

[Explanation of symbols]

1 ... Light guide cable, 2 ... Light emitting end, 3 ... Prism, A
... first apex angle, B ... second apex angle, C ... third apex angle, 5 ... stand, 6 ... outer casing, 61 ... translucent plate.

Claims (1)

[Scope of utility model registration request] 1. A light guide cable comprising a plurality of light guides for transmitting white light, and a prism having a cross section of a substantially equilateral triangle. Light is projected from a first apex angle including the first ridgeline of the prism toward a second apex angle in the light traveling direction,
A rainbow generating device, characterized in that the light emitting end of the light guide cable and the prism are arranged so as to emit the spectrum from the apex angle.