JPH02155104A - Lighting apparatus - Google Patents

Abstract

PURPOSE:To widen the distribution of illumination and at the same time to attempt improvement in the decorative effect of the title apparatus under free designing, by using a phototube as a light diffusing tube which radiates a light transmitting tube itself. CONSTITUTION:A core material 8 having its refractive index higher than that of a clear tubiform body 7 is filled into the tubiform body 7, and then one end of the tubiform body 7 is used as a lighting portion while the other end thereof as a light outputting portion. At the same time, the tubiform body 7 has a light diffusing tube 6 wherein the inner circumferential plane of the tubiform body 7 is formed to have a center line average height Ra of 0.01 to 0.6 micrometer and the circumferential wall thereof is used as a light diffusing portion, and also has an optical display unit mounted onto the light outputting portion of the light diffusing tube 6. Accordingly, light entered inside from the one-end lighting portion is split into the part thereof being reflected and the rest thereof being refracted on the inner circumferential plane of the tubiform body 7, and then the refracted light passes through the inside of the tubiform body 7 to be diffused outside so that the tubiform body 7 itself functions as a light source for permitting to give light having its high spatial distributivity. Meanwhile, the reflected light arriving at the light outputting portion as a result of its reflection can give a required lighting output by the display unit. Thus, the decorative effect of the apparatus can be improved.

Description

[Detailed Description of the Invention] The present invention relates to a lighting device using a light transmission tube, and is mainly used for stage lighting, various event lighting, studio lighting, exhibition lighting, interior decoration lighting, and fountain lighting. illumination.

In addition to being applied to outdoor decorative lighting and underwater lighting, special uses include culture tanks, artificial rearing rooms, and vegetable factories.

It is used in marine farms, hazardous materials warehouses, chemical plants, vibrating lines, oil lighting, hazardous work access lighting, etc.

[】''Lighting devices generally use light obtained from a gas or filament sealed in a tube for illumination, or use a projector or an anti-fALLW.

It uses light obtained through a light diffusing plate,
It involved heat and had a predetermined shape.

Therefore, by extracting light through optical fibers, it is possible to freely set the illumination position and to prevent the illumination from generating heat, which is used in some cases.

However, since the light transmitted through the optical fiber has a strong condensing property and the irradiated light is a spot light, the illuminance distribution is localized, and as a lighting device, it is easy to cause eye fatigue.

Also, since light is emitted only from the end of the optical fiber,
Optical fiber itself cannot be used as a lighting device and has not been used as a decoration.

The present invention was developed in view of the above, and its purpose is to use an optical transmission tube as a diffuser tube that emits light itself, thereby widening the illuminance distribution and allowing for free design. The object of the present invention is to provide a lighting device that can significantly improve the decorative effect.

That is, in the present invention, the inside of a transparent tubular body is filled with a core material having a higher refractive index than the tubular body, one end is used as a lighting section and the other end is used as a light emitting section, and the inner circumferential surface of the tubular body is A light scattering tube formed with a center line average roughness Ra of 0.01 μm to 0.6 μm and using the peripheral wall of the tubular body as a light scattering portion, and an optical display device attached to the output light portion of the light scattering tube. This is a distinctive lighting device.

The center line average roughness Ra of the peripheral surface of the tubular body of the diffuser tube is 0.01.
Since the diameter is between μm and 0.6 μm, the light incident from the lighting section at the negative end is divided into those that are reflected on the circumferential surface of the tubular body and those that are refracted, and the refracted light passes through the tubular body and exits to the outside. Since the light is diffused, the tubular body itself becomes a light source and emits light with high spatial distribution.

Further, the light that reaches the output light section by reflection can be used as a necessary illumination light by the display device.

Therefore, in addition to the illumination light from the display device, the light diffused from the tubular light source of the diffuser tube makes it possible to provide an illumination device in which the illuminance distribution is not localized but widely distributed.

If the diffuser tube is made of a flexible material, a tubular light source of any shape can be obtained, which allows for free design and is extremely convenient to handle.

Furthermore, if both ends of the tubular body are closed with transparent window materials, a fluid can be used as the core material.

Furthermore, by housing the diffuser tube in a transparent protective tube, the flexible light transmitting diffuser tube can be maintained in a fixed shape and can be protected from the external environment.

Support Fishing 1 An embodiment according to the present invention illustrated in FIGS. 1 to 4 will be described below.

This example is an example applied to a stand lighting device, and the first
The figure shows its appearance.

Reference numeral 1 denotes a base, and a support 2 extends above the base 1, and a stand shade 3 is provided at the upper end.

FIG. 2 is a diagram schematically showing the internal structure of the stand lighting device.

A halogen lamp 4 as a light source is built into the base 1, and the lower end of the support 2 fitted on the upper wall of the base 1 faces the halogen lamp 4.

The support 2 has a diffuser tube 6 fitted into a protective tube 5 forming an outer layer, and the protective tube 5 is made of a cylindrical transparent member and holds the flexible diffuser tube 6 in a straight line.

In this way, the protective tube 5 protects the internal diffuser tube 6 from the external environment and can maintain its shape by itself, and is made of glass 9 quartz.

Low melting point glass, polycarbonate, methacrylic resin.

Examples include ABS resin, polystyrene resin, and polymethylpentene resin.

The protective tube 5 can be processed into any shape in advance, and the diffuser tube 6 can be fitted into it.

Further, it is also possible to process the protective tube 5 into an arbitrary shape with the diffuser tube 6 fitted therein.

On the other hand, the stand hat 3 has a bone structure made of wire and is covered with cloth in a conical shape, and a support bar 1 is attached to the upper end of the protective tube 5.
Supported through 0.

In addition to cloth, the stand hat may be made of colored or milky white materials such as paper, film, plastic plates, glass plates, etc., and the inner surface may be coated with a reflective film if necessary.

Next, the structure of the diffuser tube 6 will be illustrated and explained in FIGS. 3 and 4.

The diffuser tube 6 has a transparent tubular body 7 filled with a core material 8, and the openings at both ends of the tubular body 7 are closed with transparent window materials 9, respectively.

The tubular body 7 is made of a transparent inorganic or organic material, such as glass, quartz, alumina, polyethylene.

Polypropylene, polyester, polyamide, silicone rubber, polycarbonate, polyvinyl chloride.

It is made of tetrafluoroethylene, hexafluoropropylene copolymer, tetrafluoroethylene perfluoroalkoxyethylene copolymer, etc.

As the core material 8 filled in the tubular body 7, a transparent liquid material having a higher refractive index than the tubular body 7 is used, and in particular, it is necessary that the liquid material be reliably retained inside the tubular body 7 for a long period of time. Viscous liquids or semi-solids are used.

Specifically, polyols such as polyethylene oxide, polypropylene oxide, and glycerin.

Polyol esters, polyol ethers.

Examples include phosphoric acid esters such as tris (chloroethyl) phosphate and tris (dichloropropyl) phosphate, liquid paraffin, fluorine moieties, silicone oil, polyisobutylene, and polysiloxane-modified polyethers.

Note that the core material 8 is not limited to liquid materials, and plastics, thermoelastomers, liquid cured materials, etc. can also be used.

For example, the inside of the tubular body 7 may be filled with a curable liquid material in an uncured state, and then the material may be cured under heating, light, radiation, etc. at room temperature.

Examples of such curable liquid materials include epoxy resin, liquid silicone, polyurethane, and liquid polybutadiene.

By filling the inside of the tubular body 7 with a curable liquid and curing it in this way, even if the inner circumferential surface of the tubular body 7 is formed roughly, the core material 8 can be firmly attached to the inner circumferential surface of the diffuser tube. can be produced extremely easily.

Note that the tubular body 7 must have a refractive index lower than that of the core material 8, but it is not necessary that the refractive index is low throughout the entire thickness direction of the tubular body 7, but on the inner circumferential surface where the core material 8 contacts. It is sufficient that the refractive index of the material in the vicinity is lower than the refractive index of the material of the core material 8 .

The window material 9 is made of a transparent material, and has a movement that encloses the core material 8 inside the tubular body 7 and allows light to enter or exit the diffuser tube.

The window material 9 is made of quartz or crown glass.

Flint glass, chalcogenide glass, sapphire, crystal, polycarbonate, methacrylic resin, polystyrene resin, etc. are used.

The inner circumferential surface 1a of the tubular body 7 of the diffuser tube 6 as described above has a fourth
As shown exaggerated in the figure, it is formed with a rough surface.

Its surface roughness is expressed as center line average roughness Ra of 0.01μ.
It is within the range of m to 0.6 μm.

Note that the center line average roughness Ra is one of the display methods used to numerically display surface roughness.
The area surrounded by this straight line and the roughness curve is equal on both sides of this straight line) is set as the X axis, and the roughness curve is y=f (x
), Ra given by the following formula is expressed in microns.

ρ: By forming the inner circumferential surface 7a of the tubular body 7 on a rough surface within the range of 0.01 μm to 0.6 μm in Ra, which takes the reference measurement length, the window material 9 can be formed as shown in FIG. Each ray of light transmitted and entering the tubular body 7 has a force 1. 2. As illustrated in 3, the core material 8 is advanced deep through various routes, but during this time, at the interface between the tubular body 7 and the core 8, that is, at the inner circumferential surface 1a of the tubular body 7. , a part is refracted and enters the inside of the tubular body 7, and a part is reflected and travels inside the core material 8 again.

The light beam refracted by the inner circumferential surface 7 a of the tubular body 7 travels outward inside the tubular body 7 and is emitted from the outer circumferential surface of the tubular body 7 .

The ratio and angle of the above refracted light and reflected light are not uniform because the local roughness and direction of the inner circumferential surface 7a of the tubular body 7 on which each light beam is incident are diverse, and as a result, the inside of the tubular body 7 The refracted light that has entered the tubular body 7 is diffused uniformly in all directions with substantially uniform intensity from the outer peripheral surface of the tubular body 7 to the entire outer peripheral surface thereof.

Therefore, the effect is similar to that of a tubular light source that emits light uniformly over the entire circumference.

Here, the surface roughness Ra of the inner peripheral surface 7a of the tubular body 7 is 0.01.
If Ra is less than μm, it becomes substantially difficult to diffuse light from the outer circumferential surface of the tubular body 7, and if Ra is greater than 0.6 μm, the light emitted from the outer circumferential surface of the tubular body 7 is directed in the longitudinal direction. A large deviation occurs in the intensity distribution, and the light intensity is strong on the incident side of the diffuser tube 6 and weak on the output side, and the proportion of light reaching the stand shade 3 is extremely small, resulting in a lack of practicality.

In order to make the inner circumferential surface 7a of the tubular body 7 have a surface roughness Ra within the range of OO1 μm to 0.6 μm, the inner circumferential surface 1a is subjected to mechanical processing such as liquid honing or plasma etching. Alternatively, this can be achieved by appropriately applying heat shrinkage or other factors during the extrusion process of the tubular body 7.

The stand shade 3 installed at the upper end of the diffuser tube 6 is
Since this is a display device and the light emitted from the diffuser tube 6 does not radiate heat, the cloth 9 is used.

Materials for scales such as film plastic plates and glass plates can be used.

When using a fabric hat, the surface is patterned with a colored pattern and the inside is white, so that the light emitted from the diffuser tube 6 is reflected on the inside of the stand hat 3 and illuminates a portion of the can pass through the inside of the stand shade 3 and cause the stand shade 3 itself to emit light.

Even if a milky-white glass plate is used as the stand hat 3, the reflected light can be used in the same way, and the hat itself can be made to emit light. If necessary, the inner surface can be coated with a film of anti-reflection to maximize the reflected light. Available.

In addition, when trying to color the light scattered from the diffuser tube 6, it is possible to use a core material 8 in which a pigment or fluorescent dye is solubilized, and in this case, the content is 0.001 wt% to 0.5 wt%.
The concentration range is

Another method is to coat the outer periphery of the diffuser tube 6 with a color film or apply paint, or furthermore, to
It is conceivable that the object itself be made of a colored transparent body.

When the protective tube 5 is used as in this example, the protective tube 5 itself may be colored.

In this way, the scattered light from the pillar 2 can be easily made into colored light, and the decorative effect can be improved.

The stand lighting device of this embodiment uses the reflected light from the stand shade 3 for illumination as described above, and at the same time, the support 2 itself emits light like a tubular light source and the diffused light illuminates the surroundings.
Expands the illuminance distribution range without tiring the eyes.

Since the pillar 2 itself emits light, it has a great decorative effect.

In addition, if the internal diffuser tube 6 is flexible, the support column 2 can be easily deformed by changing the shape of the external protection tube 5, allowing for a variety of designs. We can supply lighting devices with unique designs.

Next, a modified example of the stand illumination device is shown in FIG. 5 and will be described.

In this example, the base 1 and halogen lamp 4 of the stand lighting device of the previous example are used as they are, and the shape of the diffuser tube 20 and protection tube 21 constituting the pillar is curved at the upper end.
The display device is changed to a spherical display 22.

The diffuser tube 20 is a hollow sphere and is made of glass.
Transparent plastic can be used, and since it does not generate heat,
It is also possible to use paper or film.

The light emitted from the diffuser tube 20 enters the hollow part of the spherical display 22, is reflected and refracted on the inner surface of the spherical display 22, and the spherical display 22 itself emits bright light.

It is also possible to apply colors and patterns to the spherical display 22 on the same side, and the light scattered from the pillars can also be colored light as described above.

Next, another embodiment will be described based on FIGS. 6 and 7.

This example is a lighting device for illuminating a fountain or the like, and a diffuser tube 31 extends from a light source part 30 containing a built-in light source, the outer periphery of which is protected by a protective tube 32, and a part of the tube is submerged in water 40. The tip thereof protrudes above the water surface, and a display device 33 is attached to the tip.

Display device! 33 has one opening of the cylindrical side wall 34 as shown in FIG.
．． It is closed with a bottom wall 35 into which a protective tube 32 is fitted, and a condensing lens 36 is fitted into the other opening.

The light emitted by the diffuser tube 31 passes through the condenser lens 36 and becomes appropriately condensed light, which can illuminate a fountain or the like.

Diffuser tube installed underwater 31. Since the protective tube 32 itself emits light, the decorative effect is great.

Underwater diffuser tube 31. The shape of the protection tube 32 can be freely designed and it is easy to apply colors, so that a more decorative effect can be achieved.

In this embodiment, the condensing lens 36 is used in the light output section of the display device 33, but by using this as a wavelength selection filter, it is possible to easily color the illumination light.

It is also conceivable to use a condensing lens and a wavelength selection filter together.

Furthermore, in the case of this example, the diffuser tube 31. By constructing the protective tube 32 from a flexible material, it is convenient because it can be laid freely in the water 40 and the emission position of the illumination light can be freely set.

Next, an experimental example will be shown.

The diffuser tube has a tubular body made of tetrafluoroethylene perfluoroalkoxyethylene copolymer tree, and has an inner diameter of 11φ.
, a hollow tube with an outer diameter of 12φ and a length of 1 m is used, the inside of which is filled with trioctyl phosphate (trade name) as a core material, and both ends are sealed with quartz plugs with a diameter of 12φ and a length of 50 am. ing.

The surface roughness Ra of the inner peripheral surface of the tubular body was measured with a stylus type surface roughness meter and was found to be 0.17 μm.

An experiment was conducted on a lighting system in which a 15V, 150W halogen lamp was placed at one end of the diffuser tube, and a display device similar to that shown in Figure 7 was attached to the other end, and the brightness of the outer peripheral surface of the diffuser tube was 4800 cd. / nt
It can be seen that the light scattering performance as a light scattering tube is quite high.

It was also confirmed that the illuminance at a position 1 m in front of the condensing lens of the display device was 1300 Lux or more, which was sufficient for use as a lighting device.

In the above embodiments and experimental examples, a halogen lamp was used as the light source, but various other light sources such as a xenon lamp can be used.

Also, depending on the application, a protection tube may not be necessary.

11 Imperial Division The present invention has a surface roughness Ra of 0.01 μm on the circumferential surface of the tubular body.
-0.06 μm and filled with a core material with a higher refractive index than the tubular body to create a diffuser tube, which transmits light and diffuses light at the same time; the tube itself emits light and illuminates the surroundings. This makes it possible to obtain light with high spatial distribution, and in combination with the illumination provided by the display device, it is possible to provide illumination that does not cause eye fatigue.

The shape of the diffuser tube can be freely designed, and colored diffused light can be easily obtained by applying color, so that the decorative effect can be improved.

By closing both ends of the tubular body with a transparent window material, a fluid can also be used as the core material, increasing the degree of freedom in selecting the material and allowing the most suitable material to be selected for the purpose.

The transparent window material also functions to guide light into the diffuser tube.

Furthermore, by housing the diffuser tube in a transparent protective tube, the diffuser tube can be protected from the external environment and the shape of the diffuser tube, which is refillable, can be kept constant.

[Brief explanation of the drawing]

FIG. 1 is an external view of a stand lighting device according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing the internal structure of the device, and FIG. 3 is a sectional view of a diffuser tube used in the device. Fig. 4 is an explanatory diagram showing a partially enlarged schematic view of the same diffuser tube, Fig. 5 is a schematic diagram showing the internal structure of a stand lighting device of another embodiment, and Fig. 6 is a lighting diagram of yet another embodiment. FIG. 7, an explanatory diagram of the apparatus, is a sectional view showing the internal structure of the display device of the apparatus. 1... Base, 2... Support, 3... Stand hat, 4
...Halogen lamp, 5...Protection tube, 6...Diffusion tube, 7...Tubular body, 7a...Inner peripheral surface, 8...Core material, 9...Window material, 10 Support bar 20... Diffusion tube, 21... Protection tube, 22... Spherical display, 30... Light source section, 31... Diffusion tube, 32... Protection tube, 33...・Display device, 34... side wall, 3
5... Bottom wall, 36... Condensing lens.

Claims (1)

[Claims] 1. The inside of a transparent tubular body is filled with a core material having a higher refractive index than that of the tubular body, one end is used as a lighting section and the other end is used as an output light section, and the inside of the tubular body is Center line average roughness Ra of the circumferential surface
1. An illumination device comprising: a diffuser tube having a thickness of 0.01 μm to 0.6 μm and having a peripheral wall of the tubular body as a diffuser portion; and an optical display device attached to an output light portion of the diffuser tube. 2. The lighting device according to claim 1, wherein both ends of the tubular body of the diffuser tube are closed with a transparent window material. 3. The lighting device according to claim 1 or 2, wherein a part or all of the diffuser tube is housed in a transparent protection tube.