JPH08136739A - Outdoor illumination device - Google Patents

Abstract

PURPOSE: To provide an outdoor illumination device which is constituted so that only an insect is made blind without giving an influence to the visibility of a human being by considering the difference of a visibility factor between the human being and the insect, and which is high in safety. CONSTITUTION: The illumination device is constituted of an electric discharge lamp 4, a mirror 5 for condensing light radiated from the lamp 4, an optical fiber 7 constituted so that the light condensed by the mirror 5 is made incident on one end part thereof and emitted from the other end part and a means, for example, a filter 6 arranged at one end part of the incident side or the emitting side of the fiber 7 and set for obstructing the emission of the light whose wavelength is <=400nm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device used outdoors.

[0002]

2. Description of the Related Art FIG. 1 is an explanatory view of a conventional outdoor lighting device. In the figure, 1 is a pole, 2 is a mirror or shade having an aluminum reflecting surface, and 3 is a double tube fluorescent high pressure mercury lamp. The mercury lamp has a power consumption of about 100W.
Is about 400 W and is placed on the top of a pole with a height of about 2 m to 5 m. As is well known, the light emitted from this mercury lamp has a radiation wavelength range from 350 nm to 700 nm, as shown in FIG. By the way, insects having a light traveling property gather in this outdoor lighting device. Therefore, insects gather in the illuminated area, and insects also gather in the lighting device itself, resulting in a bad living environment and working environment. Further, even when the mercury lamp is replaced, the work is carried out in a high place or near the high voltage overhead line, and work safety is not good.

Regarding the collection of insects, the Writing Handbook (published by Ohm Co., Ltd., 1987 11)
According to the 1st edition, 1st printing on the 30th of March, it is estimated that the visibility of insects depends on the wavelength of 400 nm or less. FIG. 3 is a visibility curve of an insect, and it can be seen that the insect sees light in a portion that is just unnecessary for humans.

[0004]

As described above, the present invention focuses on the difference in visibility between humans and insects, does not affect human visibility, blinds only insects, and is safe. It is an object of the present invention to provide a high-performance outdoor lighting device.

The object of the present invention can be achieved by designing an outdoor lighting device as follows. (1) A discharge lamp, a mirror for condensing light emitted from the lamp, an optical fiber in which the light condensed by the mirror is incident on one end and emitted from the other end, It is composed of means for preventing the emission of light having a wavelength of 400 nm or less, such as a filter, which is arranged in front of the mirror or at one end of the optical fiber on the incident side or the emitting side.

(2) A discharge lamp, a mirror that transmits light having a wavelength of 400 nm or less and reflects light having a wavelength longer than 400 nm among the light emitted from the discharge lamp, and light condensed by the mirror Is incident on one end thereof and is emitted from the other end thereof.

(3) A discharge lamp having a bulb having a coating layer for cutting light having a wavelength of 400 nm or less, a mirror for collecting light emitted from the lamp, and light collected by the mirror. Is incident on one end thereof and emitted from the other end thereof.

As the discharge lamp having the above structure, a metal halide lamp containing mercury, a metal other than mercury, for example, a rare earth metal, and a halogen, an ultra-high pressure mercury lamp,
A xenon lamp can be used.

[0009]

[Function] As can be understood from the luminosity curve of FIG. 3, a wavelength of 400 nm, which is the boundary between the visible light of humans and insects.
Therefore, of the wavelength of 420 nm, light having a wavelength of 400 nm or less is mainly cut, so that only insects can be made substantially dark without affecting humans. Therefore, the insects do not come very close to the lighting system and do not enter the lighting area so much. Further, since the radiated light from the discharge lamp is guided by an optical fiber, the lamp and its power source can be installed on the ground, so that work at high places and work near high voltage lines can be omitted.

[0010]

FIG. 4 is an explanatory view of an embodiment of the outdoor lighting device of the present invention. In the figure, 4 is a metal halide lamp,
Reference numeral 5 is a mirror, 6 is a filter, and 7 is an optical fiber. Reference numeral 8 is an incident side end of the optical fiber, 9 is an outgoing side end of the optical fiber, and 10 is outgoing light. 11
Is a box that houses lamps, mirrors, filters, and other power stabilizers and is installed on the ground. The incident side end 8 of the optical fiber is fixed to the box 11, the optical fiber 7 extends in or supported by a predetermined pole, and the outgoing side end 9 thereof is supported at a predetermined position.

FIG. 5 is an explanatory view of the spectral radiation distribution of the metal halide lamp itself incorporated in the above device. This lamp contains mercury, a rare earth metal such as dysprosium, cesium, halogen, and argon gas for starting, and is a lamp mainly for obtaining visible light. As can be understood from FIG. In addition, a large amount of light having a wavelength of 400 nm or less is also emitted. Therefore, as the filter 6 used in the above apparatus, one that cuts light having a wavelength of 400 nm or less is used. As a result, the spectral distribution of the emitted light 10 becomes as shown in FIG. 6, and the emitted light 10 has a wavelength of 400 n.
The light of m is hardly included.

In the above device, the electrical input of the lamp is 2
It was lit at 50W, and the brightness of the center of the irradiated surface 5 rice ahead was about 140 lux, which was enough for humans to illuminate in the dark, but no insects gathered. .

Another embodiment having the same effect as the above outdoor lighting device will be described. (1) The mirror itself may be made into a cold mirror by stopping the use of a filter that cuts light having a wavelength of 400 nm. As is known, the cold mirror is, for example, a quartz glass mirror base provided with a dichroic film that transmits ultraviolet light and reflects visible light, and such a mirror may be used. (2) Since the metal halide lamp usually has a quartz glass bulb, the bulb itself may be coated with a coating for absorbing ultraviolet rays or a coating for reflecting ultraviolet rays. (3) The same applies to the filter, which may be made of a material such as colored glass that absorbs ultraviolet rays, or a glass substrate provided with a dichroic film to reflect ultraviolet rays. (4) The optical fiber may be glass fiber, liquid fiber or plastic fiber, and
A coating of a dichroic film may be applied to the incident side end portion or the output side end portion.

Further, as can be understood from FIG. 5, the metal halide lamp also radiates infrared rays having a wavelength of 800 nm and longer wavelengths. Therefore, when it is desired to remove the infrared rays, the incident side end of the lamp and the optical fiber is The infrared ray removing means may be arranged in the optical path between the unit and the unit.
In this case, the optical fiber is not thermally affected by the lamp.

FIG. 7 and FIG. 8 are explanatory views of the case of a short arc type ultra-high pressure mercury lamp as a discharge lamp. FIG. 7 is an explanatory view of a spectral radiation distribution from the lamp, and FIG. It is explanatory drawing of a spectral distribution wavelength. Wavelength 400
Since the wavelength range below nm is largely cut, insects can be reduced from gathering in the irradiation area.

FIGS. 9 and 10 are explanatory views of the case of a short arc type xenon lamp as a discharge lamp. FIG. 9 is an explanatory view of a spectral radiation distribution from the lamp, and FIG. 10 is a spectral distribution of emitted light. It is explanatory drawing of a wavelength. Wavelength 40
Since the wavelength range of 0 nm or less was largely cut, it was possible to reduce the gathering of insects in the irradiation area.

[0017]

As can be understood from the above description, according to the present invention, all the power supplies, lamps, etc. are stored in the box on the ground, and only the exit end of the optical fiber is in the predetermined position and the predetermined height. Since it is installed on the ground to illuminate the ground and other predetermined areas, insects do not collect much, the environment is kept good, and there is no work at a high place even in operations such as lamp replacement, so safety is improved. .

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional outdoor lighting device.

FIG. 2 is an explanatory diagram of a spectral radiation distribution of a fluorescent high pressure mercury lamp.

FIG. 3 is an explanatory diagram of human and insect visibility curves.

FIG. 4 is an explanatory diagram of an outdoor lighting device of the present invention.

FIG. 5 is an explanatory diagram of a spectral radiation distribution of a metal halide lamp.

FIG. 6 is an explanatory diagram of a spectral distribution wavelength of emitted light in the case of a metal halide lamp.

FIG. 7 is an explanatory diagram of a spectral radiation distribution of an ultra-high pressure mercury lamp.

FIG. 8 is an explanatory diagram of a spectral distribution wavelength of emitted light in the case of an ultra-high pressure mercury lamp.

FIG. 9 is an explanatory diagram of a spectral radiation distribution of a xenon lamp.

FIG. 10 is an explanatory diagram of a spectral distribution wavelength of emitted light in the case of a xenon lamp.

[Explanation of symbols]

 1 Pole 2 Mirror 3 Fluorescent High Pressure Mercury Lamp 4 Metal Halide Lamp 5 Mirror 6 Filter 7 Optical Fiber 8 Incident Side End 9 Emitting Side End 10 Emitting Light 11 Box

Claims (3)

[Claims] 1. A discharge lamp, a mirror for condensing light emitted from the lamp, and an optical fiber in which the light condensed by the mirror is incident on one end and emitted from the other end. A wavelength 400 arranged in front of the mirror or at one end of the optical fiber on the incident side or the emitting side.
An outdoor illuminating device comprising means for preventing the emission of light of nm or less, for example, a filter. 2. A discharge lamp and, of the light emitted from the lamp, a light having a wavelength of 400 nm or less is transmitted, and a wavelength of 40 nm is transmitted.
An outdoor lighting device comprising: a mirror that reflects light having a wavelength longer than 0 nm; and an optical fiber in which light condensed by the mirror is incident on one end and emitted from the other end. 3. A discharge lamp having a bulb having a coating layer for cutting light having a wavelength of 400 nm or less, a mirror for collecting light emitted from the lamp, and light collected by the mirror. An outdoor lighting device, comprising: an optical fiber that is incident on one end and emitted from the other end.