WO1990005924A1

WO1990005924A1 - Illuminator

Info

Publication number: WO1990005924A1
Application number: PCT/JP1985/000081
Authority: WO
Inventors: Hiroshi Yamashita; Kanenaga Fujii; Junji Hayakawa; Toru Komiyama; Shun Koizumi
Original assignee: Hiroshi Yamashita; Kanenaga Fujii; Junji Hayakawa; Toru Komiyama; Shun Koizumi
Priority date: 1985-02-22
Filing date: 1985-02-22
Publication date: 1990-05-31

Abstract

The illuminator according to this invention consists of a rod adapted to transmit the light entering one end thereof to the other end, diffusion stripes, which are formed on the outer circumferential surface of the rod so that the diffusion layer extends continuously or intermittently in the axial direction of the rod, and which are composed of particulate bodies of a high refractive index, a transparent protective cylinder covering the outer circumferential surface of the rod with a clearance left between surface of the rod with a clearance left between the same outer circumferential surface and the inner circumferential surface of the protective cylinder, and a seal member for sealing both ends of the circumferential clearance between the rod and protective cylinder. The light transmitted from one end to the other is sent out in the direction in which the light crosses the axis of the rod, by the diffusion-reflecting effect of the diffusion stripes and owing to the functions of the rod as a lens so as to make the light function as the illuminating light. This light is not accompanied by heat, nor does it require consideration for electric wiring and electric insulation. Accordingly, the light is suitable for the illumination of a refrigerating showcase and the operation of a lighted advertisement.

Description

TECHNICAL FIELD The present invention relates to a lighting device, particularly useful for applications such as lighting of a display, an advertisement for a case 5 and the like. ¾ The present invention relates to a lighting device. Background technology

Itoda

Conventionally, fluorescent lamps have been the most widely used lighting fixtures, but fluorescent lamps generate much less heat than incandescent lamps, but they still dissipate a considerable amount of heat. Therefore, it is not suitable for installation and use in a cold and warm atmosphere such as in a frozen or refrigerated case, and is exposed to rain like an advertising sign light Place in a place susceptible to moisture, such as in a place or refrigerated fresh fish case.

When used in place, there was a drawback that electrical faults such as poor electrical insulation and poor lighting were liable to occur. In addition, when installed and used in a bow or case, it is necessary to provide a light shielding member such as a shade to block the illumination light from the customer's vision. There were no inconveniences. Disclosure of the invention An object of the present invention is to provide a lighting device that does not generate heat at all and is particularly suitable for use in a cold or hot atmosphere such as in a frozen or refrigerated case.

Yet another object of the present invention is to have little or no adverse effects from rainwater or water vapor, especially in places exposed to rain, such as advertising lights. An object of the present invention is to provide a lighting device suitable for installation in a place susceptible to moisture, such as in a refrigerator for fresh fish.

Still another object of the present invention is to provide an illumination light which is emitted in a predetermined direction with a finger direction, and is therefore found in conventional products.

Takakasa ある We are trying to provide lighting equipment that needs to be equipped with a light-shielding member.

Other features of the present invention will be described below.)

15 The present invention provides a light transmission rod for transmitting light incident from one end to the other end, and a high refractive index formed by being continuously or intermittently attached to the outer peripheral surface of the rod in the axial direction. And a transparent protective cylinder that covers the outer surface of the rod with a gap, and the gap between the rod and the transparent protective cylinder is:

20 It is to provide a lighting device characterized in that both ends are sealed. In the lighting fixture of the present invention, the light transmission pod is not particularly limited as long as it can transmit light. For example, Ishiei glass rod (refractive index: 1.46), optical glass rod (refractive index: 1.5-7), silicone resin □ Rate: 1.4 1) This is suitable because it has high transparency and therefore has little transmission loss, and has good light resistance, so that quality and performance can be maintained for a long period of time. The rod must be solid and have a circular cross section, and its central axis may be either straight or curved. The thickness of the rod may be determined as appropriate according to the amount of light transmitted and the length of the illumination line, for example, in the range of about 3 to 30 mm, preferably 5 to 2 mm. It is appropriately selected from the range of about 0 dew. If the diameter is smaller than 3 haze, it is not possible to obtain a sufficiently large light-receiving area at the incident end. This causes light-receiving loss, whereas if it exceeds 30 mm, the price rises. In spite of this, we cannot expect the improvement of quality and performance, and neither is preferred.

Diffusion fringes for diffusing and reflecting the transmission light into the rod are formed on the outer peripheral surface of the optical transmission rod. This expansion

20 0 The stripes are rods! ) Is also composed of a light-resistant transparent fine powder having a high refractive index. For example, barium sulfate (refractive index: 1.51), mana (refractive index: 1.8), titanium (refractive index: 2.6), etc. can be advantageously used. For fine powder, ZK ₍ mixed with S (blue-green)) or " ₂ ₃ (red), ₂ ₃ (green)" to give any color to the reflected diffused light as necessary Can be mixed by heat diffusion (for example, in the case of manicure or titanium) as a means for attaching the fine powder to the rod in a striped manner. For example, a means for adhering fine powder using a light-resistant transparent adhesive such as a lithium-based adhesive may be used. It is possible to adopt a method of bonding using a transparent adhesive, and to use a fluorine-based adhesive as the adhesive, thereby further improving the light resistance!). In this case, the adhesive strength of fluorine-based adhesive is

Adhesion of fine powder, for example, as it is lower than that of rubber adhesives. It is preferable to make a structure that makes use of the anchor effect for bonding by making fine grooves). Depending on the type and degree of such surface roughening] 9 It is also possible to adjust the amount of diffuse reflection

Fluorine: The following can be exemplified. o Pin to DT

: Copolymer

o Vinyl Fluoride Oleide Medium Sulfur Mouth Ropi-one Tetra Fluoro Ethylene Copolymer

5 Diffusion fringes are formed continuously or intermittently in the axial direction with respect to the rod.Linear, curved, spiral, etc. Condition is indicated. If the thickness of the diffusion fringe is too thin, it may be possible to form a transmission hole if it is too thin, so it is advantageous to form it with a lo thickness of at least 0.1 basket or more. It is usually in the range of 0.3 to 2.0, preferably in the range of 0.3 to 1. The width of the diffusion fringes is appropriately determined according to the amount of incident light, the diameter and length of the rod (the length of the illumination line), and the like. In general, when the width of the diffusion fringe becomes large,

15 Brightness increases, but the length of the lighting line is shorter.

9i9, on the other hand, when the size is reduced, the length of the illumination line increases, but the brightness of the illumination light per unit length decreases. It may be decided appropriately according to the target. If the width of the diffusion fringe is fixed, the brightness of the illuminating light decreases exponentially with respect to the distance from the incident end, so the diffusion must be corrected to compensate for this decrease. Stripe Means may be adopted to gradually increase the width from the incident end side. In addition, a reflecting mirror is formed on the end face of the rod on the ffi-radiation end side, and a means is adopted to reflect the transmitted light reaching the ffi-radiation end toward the incident end side. Thus, such a decrease can be corrected to some extent. As described above, the width of the diffusion fringes varies depending on the rod length, diameter, incident light amount, and the use and purpose of the lighting fixture, but is usually 0.5 to 3.0 mm. Advantageously, it is about 1.5 to 2.5.

A transparent protection cylinder is provided so as to cover the outer peripheral surface of the optical transmission rod with a gap, and both ends of the gap are covered by a core member. By this rule]? Intrusion of rainwater and contaminants such as dust into the gap can be prevented, and the outer peripheral surface of the □ door can be kept clean forever. What is necessary is just to be transparent and to have light resistance and a suitable mechanical strength as the protective tube ', and for example, a transparent glass or a fluororesin can be advantageously used. Any material may be used as the material, as long as it can function as a material, for example, stone may be advantageously used.Quartz may be either transparent or opaque. . The adhesive used for bonding one line member is not particularly limited, but silicone: Ϊ-based adhesive is preferable because it has excellent adhesiveness and light resistance. Suitable.

In the lighting fixture of the present invention, the light of the mercury lamp 7, mercury lamp 7 or the like from the light-receiving end face of the rod at the time of use is transmitted by an optical system such as By the reflector

5 Incident while being collected. The incident light is transmitted in the axial direction while repeating total reflection in the rod. This transmitted light is diffused and reflected into the rod during transmission by the diffusion fringes on the outer peripheral surface of the rod, and further in the direction opposite to the diffusion fringes due to the reed action of the rod. It is emitted with directivity and functions as illumination light.

According to the lighting device of the present invention, light transmitted through the rod is sequentially transmitted by diffusion fringes in the middle of the transmission, and has directivity along the line and in the opposite direction. 5 The structure is designed to function as an illuminating light, so that it is practically free of heat and is not adversely affected by rainwater or water vapor. . Furthermore, due to the lens action of the rod]? Since it is emitted with directivity, it is not necessary to provide light shielding members such as shades.

Brief explanation of drawings

FIG. 1 is a central longitudinal sectional view showing an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the same, and Fig. 3 shows the principle of the lighting fixture of the present invention. Fig. 4 is a diagram illustrating the principle of the rod's lens action, and Fig. 5 is a diagram showing the measurement results of the brightness distribution and directivity in the axial direction of the rod in circular coordinates.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

According to a preferred embodiment of the present invention shown in FIGS. 1 and 2, diffusion stripes (1) are linearly arranged along the axial direction at the upper end of an optical transmission rod (1) installed at the center. 2) is formed, and a reflecting mirror portion (3) is formed on the end surface on the emission side. □ The outer peripheral surface of the head (1) is covered with a gap (5) by a transparent protective cylinder (4), and both ends of the gap ( ⁵ ) are also a cylindrical member which also serves as a spacing member. (See ( ⁶ )). This is the member (6)! ) Intrusion of rainwater and dust into the gap ( ⁵ ) is prevented, and the outer peripheral surface of the rod (1) can be kept clean forever.

FIG. 3 is a diagram for explaining the principle of the lighting device of the present invention.9, while the light from the light source (yo) is condensed by a reflecting mirror, When the light enters the interior, the incident light repeats total reflection in the rod (1), is transmitted in the axial direction toward the emission end, and during this transmission, Diffusion fringe (2) inside rod (1)

^ ^ Diffusely reflected and further by the lens action of the rot-hi-as shown by the arrow (7) in the figure, emitted directionally in the opposite direction to the diffuse fringe (2) Is done. As shown in the figure, when the light 5 is received directly from the light-receiving end face of the rod (1), heat may be generated at the light-receiving end face, but this heat generation is very slight. In order to prevent heat generation at the incident end face, light can be made to enter the incident end face of the rod (1) via a known optical transmission line. it can.

lo Fig. 4 is a diagram illustrating the principle of the lens action when transparent quartz (refractive index: 1.46) is used as the □ dot (1). ? Of the diffusely reflected light, the one with a divergence angle range of about ± 40 is due to the rod lens action? The light is emitted in the direction opposite to the fringe (2) at a reduced angle and becomes illumination light. is Diffuse light that exceeds the diffusion angle ± 40 repeats total reflection within the lot (1), and is again diffused and reflected by the stripe (2) in the rod (1). ) It is considered to be released outside.

In this way, the light transmitted through the rod (1) is sequentially transmitted along the line by the diffusion fringes (2) during the transmission.

20 Directionally emitted in the opposite direction to work as illumination light Fig. 5 shows circular coordinates indicating the brightness distribution and directivity of illumination light (light emitted from the rod) in the axial direction of rod (1).

However,

5 lots' Material: Quartz glass

"Diameter I 0 mm

〃 Length: 2

Diffusion fringe material: titania fine powder

2 鲰 (uniform)

l O-adhesive: slime adhesive

Light source type: Halogen light (50 W) Light source focusing: 30

In Fig. 5, the solid line shows the measurement results at a distance of 10] and the broken line shows the measurement results at a distance of 17 O. In the figure, ( ⁸ ) indicates a line of 150 lux, (9) indicates a line of 300 lux, and 0) indicates a line of 400 lux. The former has a brightness of about 400 lux at a distance of 10 or from the rod, and the latter has a brightness of about 225 lux at a distance of 10 cm. And the entrance end

The brightness was reduced to about 56% at a distance of 2 o from 170 o ffi When the reflecting mirror (3) was provided on the end face on the emitting end side, the latter The brightness was about 340 lux and the brightness was about 9,50%. Also, the directivity is about ± 20 for both the former and the latter, and the light from the diffusion fringes (2) depends on the lens action of the rod.] The directivity may be given. confirmed.

5 As described above, the illuminating device of the present invention employs a method in which light is transmitted through a rod and diffused reflection of diffuse fringes is used as illumination light. In addition to generating virtually no heat, it does not require any consideration of electrical wiring and electrical insulation, and is almost always adversely affected by rainwater and water vapor. No matter how much light is emitted with directivity due to the load action of the rod, it is necessary to provide a light-blocking member, such as the conventional one, as seen in conventional products. It is especially useful when used in various types of advertising sign lights, such as windshields and cages (especially frozen and refrigerated cases). You.

As shown in FIG. 3, the illuminating device of the present invention is not limited to the case where light is directly incident from a light source as shown in FIG. Light can be received through such optical transmission materials and other known optical transmission materials.

20. In addition, connection means may be applied in the middle of the lighting fixture, and this connection is made by heat shrinking outside the protective tube (4). Light-resistant transparent copper: can be applied

Claims

The scope of the claims

(1) An optical transmission rod that transmits light incident from one end to the other end, and a high-refractive-index fine powder that is continuously or intermittently formed on the outer peripheral surface of the rod in the axial direction. Nararu

5 Diffusion fringes and a translucent material that covers the outer peripheral surface of the rod with a gap

^ Equipped with □ head and transparent protective cylinder /

The lighting fixture is characterized in that the gap between the light protection tube and the light protection tube is ruled at both ends.

(2) The illuminating device according to (1), wherein the reflecting mirror is formed on an end surface of the light transmitting rod on the emitting end side.

(3) The rod for optical transmission is one selected from quartz glass rod, silicone 2 resin low and optical glass rod. The lighting device according to claim 1, wherein the lighting device is characterized by the following claims.

15 ④ The diameter of the optical transmission rod is 3 to 300, preferably,

The lighting device according to claim 1, wherein the lighting device is recommended to be 5 to 20.請求 A claim characterized in that the diffusion fringes are composed of at least one kind of fine powder selected from the group consisting of barium sulfate, manganese and titania. The lighting fixture according to paragraph 1 above. ⑥ the fine powder constituting the diffusing band,ヽZ n S (blue green) intended for color-imparting, Eu _z 0 ₃ (red), and T b O (green) Urn Chino one is mixed The lighting device according to claim 1, which is characterized by the following claims.

5. The lighting device according to claim 1, wherein the diffusion fringes are formed of a fine powder and a light-resistant transparent adhesive for bonding the fine powder to a rod.

拡散 Diffusion fringes are characterized by the fact that the fine powder is dispersed and mixed into the resin: a rubber molding material and a light-resistant transparent adhesive that bonds the molding material to the rod. The lighting device according to claim 1.

照明 The illuminating device according to claim 7 or 8, wherein the light-resistant transparent adhesive is a silicone-based adhesive.

15. The lighting device according to claim 8, wherein the light-resistant transparent adhesive is a fluorine-based adhesive.

10. The lighting device according to claim 10, wherein a part of a ZJ force for bonding is formed on a surface of the rod to which the adhesive is applied.

拡散 The width of the diffusion stripe is 0.5 to 3.0 鲰, preferably 1.5 Claims that claim to be located in the west of 2.5

The lighting device according to claim 1, wherein the width of the diffusion fringes is uniform over the entire length.

照明 The lighting device according to claim 1, wherein the width of the diffusion fringe is gradually increased from the incident end side.?