JPH0414303A - Obstruction marking light - Google Patents

Abstract

PURPOSE:To improve maintenability, to attain the maintenance independently of environmental conditions, and to eliminate the need for an Austen transformer by providing a light source section, a light guide and a diffusion section so as to evade a high lift work involving a risk. CONSTITUTION:The light from a light source in a box 1 led in an optical fiber cable 2 radiates from a radiation end 14 in which the direction of the radiation light is directed vertically upward in an obstruction marking light comprising the light source box 1, the cable 2 and a globe 3 being a light distribution section, part of the radiation light radiates the upper globe 3 externally, the remaining radiation light is reflected in the slope of the member 4, is advanced in upper and lower tilt directions and in a horizontal direction, the globe 3 radiated externally. The cable 2, a diffusion section 21 and the member 4 or the like are used to eliminate the need for mounting the light source to a high lift, thereby eliminating the need for a high lift work involving a risk, the maintenance performance is improved and made independent of environmental conditions, and the need of use of an Austen transformer is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an aircraft obstacle light using a light guide, and particularly to an aircraft obstacle light using an optical fiber.

[Prior Art] Conventionally, incandescent light bulbs such as vibration-resistant tungsten light bulbs have been used for aviation obstacle lights.

Maintenance work such as replacing broken light bulbs on aviation obstacle lights that are originally installed at high places is dangerous work at high places, and the above maintenance work is safe in regions with harsh natural environments such as snowfall. This is an even bigger problem. Another problem is the lack of personnel working at heights.

Furthermore, especially in aircraft obstruction lights used in radio antennas, etc., Austin transformers are used because the conductor wire used to turn on the bulb has a negative effect on the characteristics of the antenna, which increases the cost.

Furthermore, aircraft obstruction lights with medium brightness require a flickering device, which also requires the use of a large-scale device.

[Problems to be Solved by the Invention] The present invention seeks to solve the above-mentioned problems of current aviation obstacle lights.

[Means for Solving the Problems] The present invention is characterized by comprising a light source section, a light guide optically connected to the light source section, and a light scattering section that scatters light emitted from the light guide. It provides aviation obstacle lights.

The present invention also provides an aircraft obstacle light characterized by comprising a light source section, an optical fiber bundle that receives and transmits light from the light source section, and a light scattering section that diffuses the light emitted from the optical fiber bundle. be.

The aircraft obstacle light of the present invention has a structure in which the light source part and the light scattering part are separated and optically connected by a light guide. The light guide may generally be anything that transmits light and has good transmission efficiency, and optical fibers or optical fiber bundles made by bundling a plurality of optical fibers are suitable for this purpose. As the optical fiber, a core-clad type optical fiber consisting of a core and a cladding having a refractive index lower than that of the core can be used. Optical fibers that use quartz glass for the core and plastic for the cladding are a suitable example. The optical fiber bundle according to the present invention can be used in the form of an optical fiber cable integrated with suitable members from the outside. At this time, the above-mentioned members should be selected appropriately so as not to have an adverse effect on the equipment and equipment on which the aircraft obstacle lights are installed.

At and near the end of the optical fiber bundle where light from the light source enters, the optical fiber preferably lacks a cladding and consists only of a core. This is because, at the incident end, the incident light is concentrated not only on the core but also on the cladding, and there is a risk of damage due to temperature rise and heat.

Light from a light source guided through an optical fiber or optical fiber bundle (hereinafter referred to as an optical fiber bundle) is emitted from the output end of the optical fiber bundle, which is installed so that the direction of the output light is vertically upward, and the output light is emitted from the output end of the optical fiber bundle. toward the light scattering member installed vertically above. The light scattering member is a funnel-shaped body that opens vertically upward and narrows downward, and has a hole penetrating upward at the lower end, and has an outer slope below the slope C that faces diagonally downward of the funnel-shaped body. ) has light reflective properties. The funnel-shaped body may be, for example, a hollow conical body, or a conical body that is hollow and has a rounded shape at least in part in the direction of the generatrix of an inclined surface facing diagonally downward (see the cross section in FIG. 2(b)). In one example showing a plane, the inclined plane 18
It is possible to select a material having an axis of rotational symmetry, such as a shape in which a portion 19 of the shape is rounded, a spindle-like shape, a shape whose outer surface forms a paraboloid of revolution, or a shape which forms part of an ellipsoid of revolution.

The emission end and the hole of the scattering member face each other in the vertical direction, and are arranged so that the axis of rotational symmetry substantially coincides with the optical axis of the emitted light. A part of the emitted light passes through the hole and irradiates the upper globe and emits the light to the outside, and the rest of the emitted light enters the inclined surface and is reflected and travels diagonally upward, downward, and horizontally to the globe. , and emits light to the outside.

The distance between the output terminal and the light scattering member varies depending on the degree of inclination of the above-mentioned slope, but if it is too small, there is a risk that reflected light will have an unfavorable effect on the output end, and if it is too large, an excessively large glove will be required. Undesirable. The above distance can be designed within an appropriate size range for an aircraft obstacle light.

The degree of inclination (angle of inclination, etc.) of the inclined surface and the roundness of the inclined surface can be designed to satisfy the Civil Aviation Law Enforcement Regulations while taking into consideration the distance described above.

Giving at least a portion of the slope a roundness is effective in making the light visible at a predetermined luminous intensity from a predetermined direction below the horizontal plane including the center of the light source, according to the Civil Aviation Law Enforcement Regulations.

An example of the configuration of the light source section is shown in FIG. The rotary shutter 12 can be, for example, shaped like an impeller or a disc with a portion missing, but can be removed if the aircraft obstacle light is a fixed light. In addition, in order to increase the efficiency of condensing light to the input end of the optical fiber bundle in the light source section, a light source lamp 9 is provided between the mirror 8 that reflects direct light from the light source and the lens 11.
It is also possible to provide a hollow truncated conical mirror whose inner surface is a reflective mirror surface to cover the surface.

[Example] The present invention will be explained using an example. However, the present invention is not limited to this embodiment or the drawings.

FIG. 1 shows the structure of an aviation obstacle light according to the present invention, which consists of a light source box 1, an optical fiber cable 2, and a glove 3 as a light emitting part, each of which is detachable. FIG. 2 is a sectional view of the light scattering unit 21, in which 4 is a light scattering member equipped with a reflector that diffuses the light emitted from the optical fiber bundle, 5 is a holder for the member 4, and 14 is the light emitted from the optical fiber bundle. At the end, 6 is an output terminal cap of the optical fiber cable, 7 is an optical fiber cable fixing fitting, and a globe 3 (
(only a portion of which is shown) is attached to the light scattering unit base 13 to form a light emitting unit as a whole. Fig. 3 shows the configuration of the light source section, where 8 is a gicchroic mirror for condensing light, 9 is a xenon lamp, 10 is a heat ray cut filter, 11 is a condensing lens, and 12 is a blinking shutter. A cooling fan (not shown) was also provided.

The xenon lamp used in this example was for 300W. Optical fiber cables have a core made of quartz glass and a plastic cladding, with a core diameter of 1000.
μm, cladding diameter 1150μm, coat diameter 1500μm
An optical fiber bundle consisting of 30 optical fibers was wrapped around the outside of the optical fiber bundle and fixed, and the surrounding area was covered with flame-retardant polyethylene.

In order to avoid damage to the plastic cladding at the light input end of the optical fiber cable due to heat, the optical fiber was inserted into the base and fixed as a core-only structure without cladding over a length of about 10 mm from the tip 15 of the input end. . At the light output end, which is the other end of the optical fiber cable, one end surface of the optical fiber has a diameter of 4 mm and a diameter of 12 mm.
Optical fibers were inserted into the cap and fixed so as to be arranged in n++n concentric circles to serve as output terminals, and were fixed in the glove via the base 13. Vertically above the output terminal 14, a conical light scattering member 4 which is open at the top and slightly rounded on the outside at a lower part 19 of the inclined surface 18 is arranged so that the hole 17 at the lower part thereof faces the output terminal 14. I positioned it. The outer inclined surface of the light scattering member 4 serves as a reflection plate, and the diameter of the upper surface is approximately 20 mm.
mm, the angle between the generatrix of the inclined surface and the vertical line at the top is approximately 3
0°, and the diameter of the hole 17 provided at the bottom to pass light upward and illuminate the top of the globe is approximately 2 mm. In this embodiment, the distance between the exit terminal and the upper surface of the hollow cone was approximately 60 mm.

When the input end is set at a predetermined position of the light source section shown in Fig. 3 and the light is turned on, the light guided through the optical fiber bundle reaches the output end 14, which is installed so that the direction of the output light is vertically upward.
A part of the emitted light passes through the small hole 17 at the bottom of the reflecting member 4 and irradiates the globe above it to emit light to the outside. After entering, the light is scattered according to the law of reflection, illuminates the globe, and emits light to the outside.

At that time, the luminous intensity was 12 candela in a direction of 81.5 degrees from vertically upward, and more than 10 candela in any direction above 15 degrees below the horizontal plane including the center of the light source. Furthermore, when the red glass in the globe was replaced with a red gelatin filter, a maximum luminous intensity of 30 candela was obtained, and a luminous intensity of 10 candela or more was obtained in any of the above directions.

Install the rotating shutter 12 for flickering and set the number of blinks per minute to 2.
When operated in the range 0 to 60, the same luminous intensity as above was obtained.

[Effects of the Invention] The present invention has the following superior effects compared to conventional aviation obstacle lights.

(1) For aviation obstacle lights that must be installed at high places, it is no longer necessary to install the light source at high places, which eliminates dangerous work at high places such as replacing broken light bulbs, and extremely easy maintenance. good.

(2) Maintenance work such as replacing light bulbs will be done indoors and will no longer be affected by the natural environment.

(3) When installed on a radio antenna tower, an Austin transformer is not required.

(4) Optical fiber cables have high lightning resistance.

(5) When installing in a 90-130m structure, installation of a new flickering device is not necessary.

(6) In the present invention, the shutter causes flickering, and the flickering is not caused by turning the power on or off, so there is no fluctuation in the received voltage due to flickering, and the voltage can be stabilized.

[Brief explanation of the drawing]

Figure 1 is an external perspective view of the aircraft obstruction light of the present invention in a state where it is not installed, Figure 2 (a) is a cross-sectional view of the light scattering part, and Figure 2 (b).
) is an enlarged sectional view of one embodiment of the light diffusing member, and the third
The figure is a sectional view of the light source section. 1...Light source box 2...Optical fiber cable 3...Globe 4...Diffusing member 8...Gicloic mirror 9...Xenon lamp 10...Heat ray cut filter 11 - Condensing lens J2... Rotating shutter for blinking 14... Output end 15... Incident end 16 of the emitted light... Reflector plate 17... Hole 18... Outer inclined surface 19 of light scattering member. ...Rounded portion 20 of the outer slope of the light scattering member...Light source section 21...Diffusion section Figure 1

Claims (5)

[Claims] (1) An aviation obstacle light characterized by comprising a light source section, a light guide optically connected to the light source section, and a light scattering section that scatters light emitted from the light guide. (2) An aviation obstacle light characterized by comprising a light source section, an optical fiber bundle that receives and transmits light from the light source section, and a light scattering section that diffuses the light emitted from the optical fiber bundle. (3) The aircraft obstacle light according to claim 2, wherein the optical fiber bundle is composed of optical fibers having a core-clad structure, and the optical fibers are composed only of the core at the light incident end from the light source section. (4) The light scattering section consists of an output end of the output light from the optical fiber bundle and a member that diffuses the output light, and the member has a funnel-shaped inclined surface that opens upward and faces diagonally downward, and has a lower end. It has a shape having a hole penetrating upward, and the inclined surface has light reflective properties, and the hole and the emission end are provided facing each other in the vertical direction. The aviation obstruction light according to claim 2. (5) The light source unit includes a light source, a reflecting mirror, and a shutter, and the shutter is provided in the optical path of the reflected light by the reflecting mirror and blocks the reflected light entering the optical fiber bundle at predetermined time intervals. The aviation obstacle light according to claim 2, wherein: