JPH0577811U - Fiber optic lighting equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] The optical fiber lighting device 1 is capable of continuous dimming and has a simple structure. [Structure] Light control in the optical fiber illuminating device 1 is performed by a moving mechanism 50. The moving mechanism 50 moves the condenser lens 30 to move the condensing lens 40 to the incident end 4 of the optical fiber converging body 40.
Change the irradiation range to 0A. That is, the irradiation range of the converging lens 30 at the incident end 40A of the optical fiber converging body 40 is made substantially coincident with the area of the incident end 40A of the optical fiber converging body 40, and the incident end 4 of the optical fiber converging body 40 is arranged.
The position where the area is larger than 0A, and the optical fiber converging body 4
It moves to a position or the like where the area is smaller than the area of the incident end 40A of 0. Thereby, the amount of light incident on the optical fiber converging body 40 is increased or decreased, and the light from the emission end 40B of the optical fiber converging body 40 is continuously increased or decreased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lighting device using an optical fiber, and more particularly to a dimming mechanism thereof.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, a lighting device using an optical fiber has been known. In other words, in this lighting device, the light emitted from the light source is collected by a condenser lens, this light is input from the entrance end of the optical fiber and transmitted, and is emitted from the exit end of the optical fiber. .. The dimming in such an illuminating device is usually performed by changing the luminance of the light source by adjusting the power of the power adjusting device, which uses the power adjusting device for adjusting the power supplied to the light source.

Further, as another technique, there is also a means for providing a plurality of light attenuation filters between a light source and a condenser lens, and interposing these light attenuation filters or removing them to adjust light. ..

[0004]

[Problems to be solved by the device]

 However, in the former technology, when a discharge lamp that emits light with high brightness (for example, a metal halide lamp) is used as the light source, the discharge lamp turns off even if the applied voltage is slightly changed. It has the property of being stored. Therefore, there is a problem that it is difficult to dimming the discharge lamp with a wide range of brightness by the power control device.

In addition, in the latter technique, there is a problem that the structure for replacing the light amount attenuation filter is complicated and that continuous dimming cannot be performed.

The present invention solves the above-mentioned problems of the prior art. In a lighting device using an optical fiber, a circuit for electrically adjusting a light source is not necessary and continuous dimming is possible. It is an object of the present invention to provide a lighting device having a simple structure.

[0007]

[Means for Solving the Problems]

 The present invention made to solve the above problems is an optical fiber illuminating device using an optical fiber, which is formed by bundling a plurality of optical fibers with a light source, a condenser lens for condensing light from the light source. An optical fiber converging body is provided, and the light condensed by the condensing lens is transmitted so as to enter the incident end of the optical fiber converging body and to be emitted from the emitting end of the optical fiber converging body. Through the light transmission means and the condenser lens, and the irradiation range of the light at the incident end position is substantially the same as, more than, or part of the incident end face of the optical fiber converging body, And a light quantity changing means for relatively moving any one of the light source, the condenser lens, and the incident end of the optical fiber converging body substantially along the optical axis. Further, the invention of claim 2 uses the discharge lamp as the light source in claim 1.

[0008]

[Action]

 In the optical fiber lighting device of the present invention, the light emitted from the light source enters the entrance end of the optical fiber converging body and exits from the exit end, and the light is used for illumination. Further, the present invention is provided with a light amount changing means. This light quantity changing means changes the light quantity entering the entrance end of the optical fiber converging body from the condensing lens even if the brightness of the light source is constant, Are relatively driven along the optical axis.

That is, the condenser lens and the like are positioned so that the irradiation range of light through the condenser lens and at the incident end of the optical fiber converging body is substantially equal to the area of the incident end of the optical fiber converging body. Sometimes, the light from the light source is totally transmitted by the optical fiber converging body through the condenser lens. Then, when the light amount changing means relatively moves one of the light source, the condenser lens, and the incident end of the optical fiber converging body to make the irradiation range equal to or larger than the area of the incident end of the optical fiber converging body, Since only a part of the light from is incident on the incident end of the optical fiber converging body, the amount of light emitted from the optical fiber converging body is reduced and dimmed.

Further, when the irradiation range is set to be equal to or smaller than the area of the incident end of the optical fiber converging body by the light amount changing means, all the light from the light source is incident on only a part of the optical fiber converging body. Therefore, light is transmitted in a narrow range due to a part of the optical fiber converging body. In this way, the light quantity changing means can linearly change the distance from the light source, the condenser lens, or the incident end of the optical fiber converging body, so that the light emitted from the optical fiber converging body can be adjusted with a continuous light quantity. To be done.

[0011]

【Example】

 In order to further clarify the structure and operation of the present invention described above, a preferred embodiment of the present invention will be described below.

FIG. 1 is a schematic configuration diagram showing an optical fiber lighting device 1 according to an embodiment of the present invention. In FIG. 1, the optical fiber illuminating device 1 is mainly composed of a light source device 20, a condenser lens 30, an optical fiber converging body 40, and a moving mechanism 50, and light emitted from the optical fiber converging body 40. The illumination unit 70 for illuminating

The light source device 20 includes a light source 21 composed of a high-intensity discharge lamp such as a metahalide lamp, a stabilizing power supply 23 for supplying electric power to the light source 21, and a radiation direction of light from the light source 21. And a parabolic reflector 27 that regulates the.

The condenser lens 30 is arranged at a position where the light emitted from the light source 21 is focused and incident on the incident end 40 A of the optical fiber converging body 40. The optical fiber converging body 40 is a bundle of a plurality of single fibers of an optical fiber made of methacrylic resin, one end of which is fixed by a base 41 and the other end of which is provided around a mirror 70 or the like. Are located and fixed in In this case, each optical fiber in the optical fiber converging body 40 has the same arrangement at the entrance end 40A and the exit end 40B, as shown in FIG. It is located in the corresponding position. In FIG. 2, the optical fiber converging body 40 is shown as a single line of seven optical fibers for simplification of the drawing, but it is actually composed of a large number.

The condenser lens 30 is attached so as to be movable on the optical axis by a moving mechanism 50. The moving mechanism 50 includes a support member 51 that supports the condenser lens 30, a guide rail 53 that guides the support member 51 in the optical axis direction, and the condenser lens 30 and the support member 51 along the guide rail 53. And a drive mechanism 57 including a stepping motor that is integrally driven. The movement of the drive mechanism 57 is controlled by the control circuit 60, and the movement amount and the movement direction are determined according to the operation amount and the operation direction of the adjusting lever 55. The guide rail 53 is provided with stoppers 58A and 58B for restricting the movement of the condenser lens 30 at both ends thereof, and a limit switch 59 for detecting all illumination positions P, which will be described later, is provided substantially at the center. Is provided.

The operation of the optical fiber lighting device 1 will be described with reference to FIGS. 3 and 4. In the optical fiber illuminating device 1, power is supplied to the light source 21 from the stabilizing power supply 23 of the light source device 20, and the light source 21 emits light. The light emitted from the light source 21 is collected by the condenser lens 30, enters the entrance end 40A of the optical fiber converging body 40, and exits from the exit end 40B of the illumination unit 70, and the light is used for illumination.

The dimming of the optical fiber illuminating device 1 is performed by driving the moving mechanism 50 or the like to move the condenser lens 30 on the optical axis so that the condenser lens 30 enters the optical fiber bundle 40. This is done by changing the amount of light entering the end 40A.

Here, for the sake of explanation, a range illuminated by the condenser lens 30 at the position of the incident end 40 A of the optical fiber converging body 40 is referred to as an irradiation range S. Now, when the moving mechanism 50 sets the condenser lens 30 at all the illumination positions P where the irradiation range S substantially coincides with the area of the incident end 40A of the optical fiber converging body 40, the light from the light source 21 emits light. The entire amount is transmitted by the optical fiber via 30. Therefore, when the condenser lens 30 is placed at all the illumination positions P, the maximum illuminance is obtained in the illumination section 70 (FIGS. 3A and 4A).

Then, when the moving mechanism 50 is driven to move the condenser lens 30 to the dimming range R1 which is close to the incident end 40A side of the optical fiber converging body 40, the irradiation range S becomes the irradiation range of the optical fiber converging body 40. It is larger than the area of the incident end 40A. At this time, the light emitted from the light source 21 is incident on the incident end 40A of the optical fiber converging body 40 only partially, so that the amount of light emitted from the optical fiber is reduced. The amount of dimming increases as the condenser lens 30 approaches the incident end 40A side (FIG. 3 (B), FIG. 4 (B)).

On the other hand, when the moving mechanism 50 is driven to move the condensing lens 30 to the partial illumination range R2 away from the incident end 40A of the optical fiber converging body 40, the irradiation range S becomes the optical fiber converging body 40. It is smaller than the area of the incident end 40A. At this time, the light from the light source 21 is incident only on the central portion of the incident end 40A of the optical fiber converging body 40. Therefore, the light is transmitted only in a narrow range due to a part of the optical fiber converging body 40 (FIG. 3 (B), FIG. 4 (B)).

Therefore, the maximum illuminance is obtained when the condenser lens 30 is at the total illumination position P, and when the movement mechanism 50 moves the condenser lens 30 to the dimming range R1, the illuminance becomes low, while When the condenser lens 30 is moved to the partial illumination range R2, a spot-like illumination that partially emits strong light from the incident end 40A is obtained. As described above, according to the optical fiber illumination device 1, various kinds of illumination can be obtained, and further, by continuously moving the condenser lens 30, the light emitted from the optical fiber converging body 40 is made into a continuous light amount. Can be dimmed.

Further, in the above-mentioned embodiment, since the light adjustment is not performed by adjusting the electric power to the light source 21, even when a discharge lamp is used as the light source 21, the light control is performed without turning off the light source 21. Since the circuit does not have to be used, there is also an effect that the circuit configuration can be simplified.

Although some embodiments of the present invention have been described in detail above, the present invention is not limited to these embodiments in any way, and can be implemented in various modes without departing from the scope of the present invention. Of course, it can be implemented. For example, the following configurations can be applied.

(1) Although the moving mechanism 50 is configured to be driven by a motor, the moving mechanism 50 is not limited to this, and may be a mechanical mechanism that can be manually operated using a worm gear or the like.

(2) In the above embodiment, the condensing lens 30 is configured to be moved. However, if the moving means is capable of adjusting the amount of incident light on the incident end 40A of the optical fiber converging body 40, the light source can be adjusted. 21 or the incident end 40A of the optical fiber converging body 40 may be relatively moved.

(3) The optical fibers of the optical fiber converging body 40 are arranged at the same position on the incident end 40A and the emitting end 40B, but various arrangements may be taken according to the illumination range and the illumination position. Good.

(4) The optical fiber lighting device 1 can be applied to various applications by taking advantage of the characteristics of the lighting. That is, the light emitted from the optical fiber has a lower temperature than that of an incandescent lamp, etc., and it can be applied to a mirror unit such as a mirror stand, taking advantage of the characteristic that it does not sweat people, and it is also a power supply circuit for a light source section. It can be applied to sinks and bathrooms by taking advantage of the fact that it is easy to take measures against electric leakage by installing the LED away from the lighting unit.

[0028]

[Effect of the device]

 As described above, according to the optical fiber lighting device of the present invention, the light amount changing means relatively moves either the light source, the condenser lens, or the incident end of the optical fiber converging body along the optical axis. By doing so, the light emitted from the optical fiber converging body can be adjusted.

Further, in the present invention, since the dimming is not performed by adjusting the electric power to the light source, the discharge lamp can be stably turned on by the constant power supply device, and the electric power to the light source is adjusted. Since there is no need to use a power adjustment circuit for this purpose, the circuit configuration can be simplified.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an optical fiber lighting device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining an arrangement of optical fiber converging bodies and the like.

FIG. 3 is an explanatory diagram illustrating an operation of the optical fiber illuminating device according to the embodiment.

FIG. 4 is an explanatory diagram illustrating an operation of the optical fiber illuminating device according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Optical fiber illuminating device 20 ... Light source device 21 ... Light source 23 ... Stabilizing power supply 27 ... Parabolic reflector 30 ... Condensing lens 40 ... Optical fiber converging body 40A ... Incident end 40B ... Emitting end 41 ... Base 50 ... Moving mechanism 51 ... Support member 53 ... Guide rail 55 ... Adjusting lever 57 ... Drive mechanism 58A, 58B ... Stopper 59 ... Limit switch 60 ... Control circuit 70 ... Illumination part S ... Irradiation range P ... Whole illumination position R1 ... Dimming range R2 ... Part Lighting range

Claims (2)

[Scope of utility model registration request] 1. An optical fiber illuminating device using an optical fiber, comprising: a light source, a condenser lens for condensing light from the light source, and an optical fiber converging body formed by bundling a plurality of optical fibers, An optical transmission unit that transmits the light condensed by the condensing lens so as to enter the incident end of the optical fiber converging body and to be emitted from the emitting end of the optical fiber converging body; and the condensing lens. The light source, the condenser lens or the optical fiber converging body so that the irradiation range of the light at the incident end position is substantially the same as, more than, or part of the incident end surface of the optical fiber converging body. An optical fiber illuminating device comprising: a light amount changing unit that relatively moves any one of the incident ends of the light emitting device and the light receiving unit. 2. The optical fiber lighting device according to claim 1, wherein the light source is a discharge lamp.