JPH08138413A - Hid floodlight luminaire - Google Patents

Abstract

PURPOSE: To increase a rate of a light flux incident on a surface to be illuminated, and perform illumination excellent in a coefficient of utilization by straining light distribution of an HID floodlight luminaire in both the vertical angle direction and the horizontal angle direction. CONSTITUTION: A maximum luminous intensity point exists in the optical axis center, and luminous intensity not less than the vertical angle 10 deg. direction from the maximum luminous intensity point is cut, and luminous intensity not more than the vertical angle -45 deg. direction from the maximum luminous intensity point is cut, and luminous intensity not less than the horizontal angle 45 deg. direction from the maximum luminous intensity point is cut, and a beam light flux in a vertical angle ±5 deg. and a horizontal angle ±5 deg. from the maximum luminous intensity point is set so as to have light distribution not less than 54% of the light flux of a luminaire. Luminous intensity not less than the 5 deg. direction is cut, and luminous intensity not more than the vertical angle -30 deg. direction from the maximum luminous intensity point is cut, and luminous intensity not less than the horizontal angle 45 deg. direction from the maximum luminous intensity point is cut, and a beam light flux in a vertical angle ±20 deg. and a horizontal angle ±20 deg. from the maximum luminous intensity point is set so as to have light distribution not less than 78%, of the light flux of the luminaire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a high intensity discharge lamp (High I
ntensity Discharge Lamps (hereinafter referred to as HID). More specifically, the present invention relates to a floodlighting fixture having a metal halide lamp, a mercury lamp, a high-pressure sodium lamp, or the like as a light source.

[0002]

2. Description of the Related Art As a lighting device on a nighttime lighting tower used in a baseball field, a soccer field or the like, an HID floodlighting device having a round reflector is generally well known. Explaining with reference to the drawings, the HID floodlighting illuminator shown in FIG. 11 is one example. In FIG. 11, 20 is a lighting fixture, and 21
Is a light source, and 22 is a round reflector. This lighting fixture 20
Has a concentric light distribution that is almost equal in the vertical direction and the horizontal angle direction. For this reason, a large amount of light does not become an effective luminous flux for the surface to be illuminated during illumination design. That is, useless light is likely to be generated.

Conventionally, a floodlight having a concentric light distribution has been designed by combining a narrow-beam projector and a wide-beam projector, but with respect to the total luminous flux of the HID light source of the floodlight fixture. As a result, there is a problem that the ratio of the light flux incident on the illuminated surface is small and the illumination ratio is low. Therefore, it has been desired to improve the lighting rate, reduce the light pollution due to the light leaking out of the facility, and improve the cost performance of the lighting.

According to the present invention, in a HID circular floodlighting luminaire, the proportion of the effective luminous flux incident on the illuminated surface is increased by distorting the light distribution in the vertical / horizontal angle direction including the maximum luminous intensity point. The purpose is to provide good lighting.

[0005]

In order to achieve the above object, the first HID floodlighting luminaire of the present invention has a maximum luminous intensity point at the center of the optical axis, and a vertical angle of 10 ° or more from the maximum luminous intensity point. Cut the luminosity of the, and the vertical angle -45 from the maximum luminosity point.
Cuts the luminosity below the ° direction, and the horizontal angle is 4 from the maximum luminosity point.
The luminous flux in the 5 ° direction or more is cut, and the beam luminous flux within a vertical angle of ± 5 ° and a horizontal angle of ± 5 ° from the maximum luminous intensity point is 54% of the instrument luminous flux.
It is characterized by having the above light distribution.

In the second HID floodlighting luminaire of the present invention, the maximum luminous intensity point is located at the center of the optical axis, and the luminous intensity in the vertical direction of 25 ° or more is cut from the maximum luminous intensity point, and the vertical luminous intensity is measured from the maximum luminous intensity point. It cuts the light intensity below the angle -30 direction, cuts the light intensity above the horizontal angle of 45 ° from the maximum light intensity point, and the beam light flux within the vertical angle ± 20 ° horizontal angle ± 20 ° from the maximum light intensity point is 80% of the instrument light flux. It is characterized by having the above light distribution.

[0007]

According to the structure of the first HID floodlight illuminator of the present invention described above, the maximum luminous intensity point is located at the center of the optical axis, and the luminous intensity in the vertical direction of 10 ° or more is cut from the maximum luminous intensity point. A luminous flux within a vertical angle of −45 ° from the luminous intensity point is cut, and a luminous intensity at a horizontal angle of 45 ° or more is cut from the maximum luminous intensity point, and a beam flux within a vertical angle of ± 5 ° and a horizontal angle of ± 5 ° from the maximum luminous intensity point. Has a luminous intensity distribution of 54% or more of the instrument luminous flux, which distorts the luminous intensity distribution in the vertical / horizontal direction including the maximum luminous intensity point, thereby increasing the ratio of the effective luminous flux incident on the illuminated surface and increasing the illumination ratio. Good lighting can be achieved.

FIG. 3 shows an example of soccer field lighting design.
The solid line 8 indicates the aiming direction of the narrow-angle projector, and the broken line 9 indicates the aiming direction of the wide-angle projector.
The square of 0 is an illumination tower in which a floodlight is installed, and 11 is a ground consisting of a long side a and a short side b. The floodlights tend to aim mainly around the ground, and when viewed from the lighting tower in which 10 floodlights are installed, 8 narrow-angle floodlights are far from the ground, and 11 wide-angle floodlights are near the ground in the aiming direction. Tend to do. This is because a narrow-angle projector with a high central luminosity and a small beam radius in the distance from the ground cannot provide sufficient illuminance to the ground unless the luminosity is sufficient in the required range. This is because if the wide-angle projector with a low beam diameter and a large beam radius is required to provide the required luminosity evenly, it is not possible to provide sufficient illuminance uniformity to the ground. Further, if it is attempted to provide sufficient vertical illuminance in the vicinity of the long side a and the short side b of the 11th ground, it is obvious that the aiming of the projector tends to concentrate on the peripheral portion of the ground. Here, with a conventional circular projector having a narrow-angle beam distribution, an illuminance of 2000 in the ground.
Figure 4 shows the result of simulating how much light leaks out of the facility as a result of aiming to give lx.

Next, as a result of aiming to give an illuminance of 2000 lx to the ground with the first floodlight of the present invention, the vertical illuminance distribution is used to simulate how much light leaks outside the facility. The results obtained are shown in FIG. As a result, it can be seen that this floodlight cuts the distribution of light with a maximum luminous intensity of 10 ° or more, and therefore the range and its value of the leakage light outside the facility are reduced. On the contrary, the maximum luminous intensity is 10 °
By keeping the following light distribution without cutting,
Almost no decrease in illuminance is seen around the ground and within the range surrounded by the three illumination towers. As a result, it can be seen that only the light leaking out of the facility can be reduced without reducing the illuminance of the audience seats around the competition ground.
This is also an effect of cutting the luminous intensity in the horizontal angle direction of 45 ° or more from the maximum luminous intensity point.

When a perfect spherical light source is present at a certain height as shown in FIG. 6, the ground plane has 12 normal illuminances, 13 horizontal plane illuminances, and 14 vertical planes as the distance increases with the position directly below the source as 0m. Show how the illuminance changes.

When the height of the perfect spherical light source is equal to the distance from directly below the perfect spherical light source, that is, when the incident angle is 45 °, the vertical illuminance given is higher than the horizontal illuminance.

From this, it is considered that even in floodlighting, the property is changed when the incident angle is near 45 °. As the angle of incidence becomes shallower from around 45 °, the effect cannot be expected so much even if it is attempted to increase the evenness of the horizontal plane illuminance with a wide-angle projector, but rather it is important to give a vertical illuminance efficiently with a narrow-angle projector. On the contrary,
No matter how high the angle of incidence of the narrow-angle projector is to increase the vertical plane illuminance, the effect cannot be expected so much, and only the uniformity of the horizontal-plane illuminance is deteriorated. It is important to focus on improving the uniformity of horizontal illuminance. In other words, the nature of the projector should be switched along with its turning angle.

Next, in the second projector of the present invention, the maximum luminous intensity point is located at the center of the optical axis, the luminous intensity in the direction of the vertical angle of 25 ° or more is cut from the maximum luminous intensity point, and the vertical luminous intensity −30 from the maximum luminous intensity point. The luminous intensity below the ° direction is cut, and the luminous intensity above the horizontal angle of 45 ° is cut from the maximum luminous intensity point, and the luminous flux within the vertical angle ± 20 ° horizontal angle ± 20 ° from the maximum luminous intensity point is 80% or more of the instrument luminous flux. By providing the light distribution, the illumination efficiency is further improved by supplementing the case where the turning angle is deep with the projector in which the illumination efficiency becomes higher as the incident angle becomes deeper. In the second floodlight of the present invention, the luminosity of the vertical angle of 25 ° or more is cut off from the maximum luminosity point, so that even if the turning angle is taken to be the shallowest, the spectator seats will be illuminated but outside the facility. Leakage light can be reduced, and because the luminous intensity below the vertical -30 ° direction is cut off from the maximum luminous intensity point, it is not necessary to create a point with unnecessary high illuminance directly below the 10 lighting towers. . Further, by cutting off the luminous intensity in the horizontal angle direction of 45 ° or more from the maximum luminous intensity point, it is possible to reduce the leakage light in the lateral direction. In addition, the aiming line of the narrow-angle projector that is aimed to provide vertical illuminance far from the ground of 11,
The horizontal separation angle, which is the angle formed by the aiming lines of the adjacent narrow-angle projectors, is about 5 °, and the horizontal separation angle of the wide-angle projectors that are aimed to provide the horizontal plane illuminance near the ground of 11 is set to about 20 °. Is desirable. In other words, how to irradiate the beam within this range is another point.

Here, in the first projector of the present invention, in the projector for distant irradiation, the vertical angle ± 5 from the maximum luminous intensity point.
The beam luminous flux within a horizontal angle of ± 5 ° has a light distribution of 54% or more of the luminous flux of the instrument, and in the projector for near irradiation of the second projector of the present invention, a vertical angle of ± 20 ° from the maximum luminous intensity point ±
The beam light flux within 20 ° has a light distribution of 80% of the instrument light flux.

In the illuminator for distant irradiation, the central luminous intensity of the beam is enhanced by concentrating the beam luminous flux finely, and the illuminance can be efficiently and intensively given to the point far away. However, if the concentration is too much, the illuminance only at that point. Is increased, and as a result, the uniformity is deteriorated. For this reason, in the projector, the rest of the beam flux is distributed in order to secure a higher degree of uniformity,
In the projector of the preferred example, since the beam luminous flux is wide and the beam central luminous intensity is low, the remaining beam luminous flux is distributed so as to secure less proportionality.

By combining these first and second HID floodlighting luminaires of the present invention, the effect of floodlighting is further improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a luminous intensity distribution diagram of an HID floodlighting illuminator according to an embodiment of the present invention. In FIG. 1, 1 is the maximum luminous intensity 1
It is a cut line that cuts the light distribution of 0 ° or more,
2 is the range including the beam center where the beam luminous flux is concentrated at 54% or more of the instrument luminous flux within ± 5 ° vertical angle from the maximum luminous intensity point, and 3 is the -45 ° vertical direction from the maximum luminous intensity point. The following luminosity is cut and the horizontal angle is 45 ° from the maximum luminosity point.
It is a cut line that cuts the luminous intensity above the direction.

Next, FIG. 2 shows a luminous intensity distribution diagram of the HID floodlighting luminaire of another embodiment of the present invention. In FIG. 2, 4 is a cut line that cuts the luminous intensity in the vertical direction of 25 ° or more from the maximum luminous intensity point, and 5 is a cut line that cuts the luminous intensity in the vertical direction of −30 ° direction or less from the maximum luminous intensity point. , 6 is a vertical angle ± 20 ° from the maximum luminous intensity point and a horizontal angle ± 20 °
It is the range that includes the beam center where the beam light flux is concentrated in 80% or more of the instrument light flux, and 7 is the horizontal angle 4 from the maximum brightness point.
It is a cut line that cuts the luminous intensity in the 5 ° direction or more.

Next, FIG. 7 shows an illumination design result of the ground designed by the above-mentioned projector (FIG. 1). FIG. 8 shows the result of lighting design of a ground designed by a general narrow-angle round projector.

Further, FIG. 9 shows the illumination design result of the ground which is illumination-designed by using the above-mentioned (FIG. 1) (FIG. 2) in combination.
Shown in Fig. 10 shows the lighting design results for a ground that was designed by using general narrow-angle and wide-angle round projectors in combination.
Shown in

From these, in any case, although the light distribution of the present invention is extremely distorted,
It can be seen that the number of projectors used can be reduced when trying to obtain the same illuminance without extremely deteriorating the uniformity in the ground.

[0022]

As described above, the first and second HID floodlighting luminaires of the present invention can suppress the leakage light outside the facility to about 50% or less without lowering the illuminance of the audience seats. , HI
The number of D floodlights can be reduced by about 20%. As a result, floodlights that are environmentally friendly can be realized at low cost, and this effect is great.

[Brief description of drawings]

FIG. 1 is a luminous intensity distribution diagram of an embodiment of a first HID floodlighting luminaire of the present invention.

FIG. 2 is a luminous intensity distribution diagram of an embodiment of a second HID floodlighting luminaire of the present invention.

FIG. 3 is a soccer field lighting design example.

FIG. 4 is a result diagram simulating how much light leaks to the outside of the facility by aiming with a conventional circular projector having a narrow-angle beam distribution.

FIG. 5 is a result diagram simulating how much light leaks to the outside of the facility by aiming with the first floodlight of the present invention.

FIG. 6 is a diagram showing the relationship between the distance to the ground plane, the normal illuminance, the horizontal illuminance, and the vertical illuminance when a perfect spherical light source is present.

FIG. 7 is a lighting design result of a ground designed by the floodlight of FIG.

FIG. 8 is a result of designing illumination of a ground with a general narrow-angled round projector.

FIG. 9 is an illumination design result diagram of a ground that is illumination-designed by using the projectors of (FIG. 1) (FIG. 2) together.

FIG. 10 is an illumination design result diagram of a ground that is designed for illumination by commonly using general narrow-angle and wide-angle round projectors.

FIG. 11 is a perspective view of a conventional HID floodlighting luminaire.

[Explanation of symbols]

1 Cut line that cuts the light distribution with maximum luminous intensity of 10 ° or more 2 Vertical range from the maximum luminous intensity point ± 5 ° vertical range ± 5 ° horizontal beam ± 5 ° 3 Cut line that cuts luminosity below the vertical angle of -45 ° from the maximum luminosity point and cuts luminosity above the horizontal angle of 45 ° from the maximum luminosity point 4 Luminous intensity above the vertical angle of 25 ° from the maximum luminosity point Cut line 5 Cut the maximum luminous intensity point at a vertical angle of -30 ° or less. Cut line 6 Cut the maximum luminous intensity point at a vertical angle of ± 20 ° Horizontal angle of ± 20 ° 78% or more of the center of the beam including the center of the beam 7 Cut line that cuts the luminosity of the horizontal angle of 45 ° or more from the maximum luminosity point 8 Aiming direction of the narrow-angle projector 9 Aiming method of the wide-angle projector 10 Illumination tower in which a floodlight is installed 11 Top view of a ground consisting of long sides a and short sides 12 Normal illuminance on the ground surface when a perfect spherical light source is present 13 Ground surface when a perfect spherical light source is present Horizontal illuminance at 14 14 Vertical illuminance at the ground plane in the presence of a perfect spherical light source 20 Lighting fixture 21 Light source 22 Round reflector

Claims (2)

[Claims] 1. The maximum luminosity point is located at the center of the optical axis, the luminosity in the vertical direction of 10 ° or more is cut from the maximum luminosity point, and the luminosity in the vertical direction of −45 ° or less is cut from the maximum luminosity point to obtain the maximum luminosity. Cut the luminosity above the horizontal angle of 45 ° from the point,
A HID floodlighting luminaire characterized in that a beam luminous flux within a vertical angle of ± 5 ° and a horizontal angle of ± 5 ° from the maximum luminous intensity point has a light distribution of 54% or more of the luminous flux of the fixture. 2. The maximum luminosity point is located at the center of the optical axis, the luminosity in the vertical direction of 25 ° or more is cut from the maximum luminosity point, the luminosity in the vertical direction −30 direction or less is cut from the maximum luminosity point, and the maximum luminosity point is obtained. HID projection characterized by cutting the luminous intensity in the direction of horizontal angle of 45 ° or more from the maximum luminous intensity point, and the beam luminous flux within the vertical angle of ± 20 ° horizontal angle ± 20 ° has a luminous flux distribution of 80% or more of the instrument luminous flux. lighting equipment.