JPH05159753A - Method for manufacturing electric bulb with reflecting mirror and illumination intensity inspecting device used for this method - Google Patents

Abstract

PURPOSE:To provide a method for manufacturing an electric bulb with a reflecting mirror utilized as a light source for an optical fiber wherein reliability can be enhanced by suppressing dispersion of a characteristic. CONSTITUTION:An optical fiber fixing metal fixture 14 of an illumination intensity inspecting device 2 is set up so that the center axis of the optical fiber fixing metal fixture 14 agrees with an optical axis Z of a tungsten halogen lamp 54. Light emitted from the tungsten halogen lamp 54 and reflected by a reflecting mirror 52 is emitted to the front and incident upon a light receiving surface of an optical fiber 12. This incident light is transmitted in the optical fiber 12 and input to a light receiver 16. Illumination intensity of light is measured by a light sensor 24 and displayed in a meter 18. A position of the tungsten halogen lamp 54 is determined by moving it in a direction of the optical axis Z so that a value displayed in each meter 18 obtains the predetermined value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a light bulb with a reflector used as a light source for an optical fiber and an illuminance inspection device used in the method.

[0002]

2. Description of the Related Art A light bulb with a reflector is mainly used for accent lighting and a light source for video / photographing, etc., but recently, it is also used as a light source for optical fibers.
As shown in FIG. 6, the light bulb with a reflecting mirror has a small halogen light bulb 54 in which a filament 62 is sealed inside a reflecting mirror 52 having a reflecting surface 52a formed in a spheroidal shape.
It is fixed with a heat resistant adhesive 56.

By the way, a light bulb with a reflector used as a light source for an optical device has a predetermined light distribution characteristic on a plane separated from the end surface of the reflector 52 by a working distance (Mounting Distance or Mounting Distance) L. It is required that all products of the same type have certain characteristics.

The light distribution characteristics of such a light bulb with a reflecting mirror are determined by the reflection characteristics of the reflection surface 52a and the installation position of the halogen light bulb 54. Usually, since the shape of the reflecting surface 52a is set in advance, only the positioning of the halogen bulb 54 becomes a problem. However, it is extremely difficult to mold the glass with the glass reflecting mirror 52 so that the reflection characteristics become constant, and it is inevitable that the reflection characteristics vary to some extent. Therefore, even if the halogen bulb 54 is arranged at a position theoretically obtained to obtain the desired light distribution characteristic, the desired light distribution characteristic cannot be obtained.

Therefore, conventionally, a light bulb with a reflecting mirror is assembled by using an illuminance inspection device 80 as shown in FIG. The illuminance inspection device 80 includes an aperture 82 (see FIG. 8) and a lens 84 arranged in front of the reflecting mirror, a large irradiated screen 86 further arranged in front of the lens 82, and a plurality of (for example, a plurality of) provided on the screen 86. Five) optical sensors 88 and a meter 92 are provided. Halogen bulb 5
When 4 is emitted, an image of the aperture 82 is actually displayed on the screen 86, and the illuminance of light sensed by the optical sensor 88 is displayed on the meter 92. By moving the halogen bulb 54 along the optical axis Z, the position of the halogen bulb 54 is found such that the meter 92 shows a predetermined value. Then, at that position, the halogen bulb 54 is fixed in the reflecting mirror 52 with an adhesive 56.

[0006]

However, when a light bulb with a reflecting mirror is used as a light source for an optical fiber, there is a certain angle (light receiving angle) for effectively allowing light to enter the inside of the optical fiber. In the method, only the illuminance of the light projected on the screen is measured, and this light receiving angle is ignored. As described above, in the conventional method, since the light distribution characteristic on the light receiving surface of the actually used optical fiber is not considered, there is a problem in that the amount of light flux incident on each optical fiber varies. Further, in order to assemble the light bulb with a reflecting mirror by the above-mentioned conventional method, it is necessary to install a large screen in front of the reflecting mirror capable of accommodating a required light distribution. is there.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method of manufacturing a light bulb with a reflector, which is used as a light source for an optical fiber and which can suppress variations in characteristics and improve reliability. It is intended.

The present invention has been made based on the above circumstances, and is used in a method for manufacturing a light bulb with a reflecting mirror.
The purpose is to provide a small-scale, space-saving illuminance inspection device.

[0009]

In order to achieve the above object, a method of manufacturing a light bulb with a reflector according to the present invention provides a light emitter inside a reflector having a reflecting surface formed in a quadratic curved surface. In a method of manufacturing a light bulb with a reflector by arranging, light emitted from the light emitter is made to enter into a plurality of optical fibers installed in front of the reflector, and light emitted from an emission surface of the optical fiber. Is measured, and the position of the light emitter with respect to the reflecting mirror is determined so that the illuminance becomes a predetermined value.

In order to achieve the above object, an illuminance inspection apparatus according to the present invention comprises one optical fiber at the center of the light-receiving surface and at least four optical fibers arranged at the peripheral portion of the light-receiving surface with a predetermined interval. And a means for measuring the illuminance of the light emitted from the emitting surface of the optical fiber.

[0011]

According to the method of manufacturing a light bulb with a reflector according to the present invention, the light emitted from the light emitter is made to enter a plurality of optical fibers and the illuminance of the light emitted from the emission surface of the optical fibers is measured. As a result, while confirming the light distribution characteristics of the light that has entered the optical fiber from the light bulb with a reflector,
The light emitter can be positioned. Also, when using a light bulb with a reflecting mirror as a light source for an optical fiber, by setting the light receiving surface of the optical fiber at a position apart from the front edge of the reflecting mirror by a predetermined installation distance, the light is actually incident on the optical fiber. Since the luminous flux amount of light can be measured, the illuminance of light can be measured in consideration of the light receiving angle of the actually used optical fiber.

The illuminance inspection apparatus according to the present invention having the above-mentioned configuration can measure the luminous flux amount of the light actually incident on the optical fiber by using the apparatus for the above-described method of manufacturing the light bulb with a reflecting mirror. ..

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining a method of manufacturing a light bulb with a reflector, which is an embodiment of the present invention.

The reflector-equipped electric bulb 50 shown in FIG. 1 is used as a light source for an optical fiber. The light bulb with a reflector 50 has a reflector 52 having a reflecting surface 52a formed in a quadric surface of revolution (for example, an ellipsoid of revolution), and a small halogen bulb 54. The halogen bulb 54 includes a filament 62, a bulb 64, an inner lead wire 66 and an outer lead wire 68, a molybdenum foil 72 connecting the inner lead wire 66 and the outer lead wire 68, and a terminal connected to the outer lead wire 68. And a pin 74.

As the final work of manufacturing a light bulb with a reflector,
It is necessary to position the halogen light bulb 54 so that the light bulb with a reflecting mirror has a predetermined light distribution characteristic. Therefore, in this embodiment, the illuminance inspection device 2 shown in FIG. 1 is used. The illuminance inspection device 2 includes five optical fibers 12, an optical fiber fixing bracket 14 for fixing the optical fibers 12, a light receiver 16 for detecting light emitted from the emitting surface of each optical fiber 12, and light detected by the light receiver 16. And a meter 18 for displaying the illuminance. Optical fiber fixing bracket 14
Is formed in a cylindrical shape, and the end portion of the optical fiber 12 on the light receiving surface side is disposed inside thereof. Each of the optical fibers 12 on the emission surface side is connected to a light receiver 16.

Further, as shown in FIG. 2, the optical fibers 12 are arranged at equal intervals around and around the central axis of the optical fiber fixing fitting 14. This makes it possible to measure the illuminance distribution at the center position on the end surface of the optical fiber fixing bracket 14 and at the four positions around the center position.

As shown in FIG. 3, the light receiver 16 includes an optical fiber protection tube 22 for protecting the optical fiber 12, an optical sensor 24 for measuring the illuminance of light, a diffusion plate 26 for diffusing the light, and an optical fiber protection tube 22. And a fixing metal fitting 28 for fixing the optical sensor 24. The optical fiber protection tube 22 and the optical sensor 24 are fixed to the fixing fitting 28 by screws 32 and 32, respectively. The diffuser plate 26 is arranged between the emitting surface of the optical fiber 12 and the optical sensor 24. In this embodiment, since the ready-made optical sensor 24 is used, the area of the emitting surface of the optical fiber 12 and the optical sensor 2 are
4 does not necessarily match the area of the detection surface. For this reason,
The light emitted from the emission surface of the optical fiber 12 is diffused by the diffusion plate 2
The light is effectively and evenly incident on the entire surface of the optical sensor 24 via the light source 6. Light sensor 24 is meter 18
Connected to.

Next, a method of positioning the halogen bulb 54 using the illuminance inspection device 2 will be described. First, the halogen bulb 54 is inserted into the reflecting mirror 52, and the sealing portion of the halogen bulb 54 is positioned at the inner bottom portion of the reflecting mirror 52. The optical fiber fixing bracket 14 of the illuminance inspection device 2 has the center axis of the optical fiber fixing bracket 14 and the halogen bulb 5.
It is arranged so that the optical axis Z of 4 may coincide. Further, the distance (installation distance) L from the front end surface of the reflecting mirror 52 to the end surface of the optical fiber fixing bracket 14 is a preset value.

After installing the illuminance inspection device 2 in this way,
When power is supplied to the halogen bulb 54, the filament 6
2 emits light, and the light reflected by the reflecting mirror 52 is emitted forward and enters the light receiving surface of the optical fiber 12. This incident light is conducted through the optical fiber 12 and enters the light receiver 16. The illuminance of light is measured by the light sensor 24, and the meter 1
8 is displayed. The halogen bulb 54 is moved in the direction of the optical axis Z, and the position of the halogen bulb 54 is determined so that the value displayed on each meter 18 is a predetermined value. Finally, the halogen bulb 54 is fixed in the reflecting mirror 52 with a heat resistant adhesive or the like.

In the method of manufacturing a light bulb with a reflector according to this embodiment,
Positioning the halogen bulb while checking the light distribution characteristics of the bulb with a reflector by measuring the illuminance of the light emitted from the emitting surface of the optical fiber by using an illuminance inspection device that uses an optical fiber. You can When using a light bulb with a reflector as a light source for an optical fiber, set the end of the optical fiber fixing bracket apart from the front end of the reflector by a predetermined distance in the same state as when actually using it. Since the luminous flux of the light that actually enters the optical fiber can be measured by arranging it at a position and performing the measurement, when positioning the halogen bulb, the positioning should also be performed in consideration of the light receiving angle of the optical fiber. be able to. Therefore, the light bulb with a reflecting mirror manufactured by the method of this embodiment has a highly reliable light distribution characteristic with less variation in characteristics.

As an example, FIG. 4 shows a light distribution characteristic diagram of the light bulb with a reflecting mirror manufactured in this embodiment, and FIG. 5 shows an isoilluminance curve diagram of the light bulb with a reflecting mirror. Here, the xy coordinate system is set on a plane which is perpendicular to the optical axis of the reflector-equipped electric bulb and is separated from the front edge of the reflector by a predetermined distance, and the intersection point of this plane and the optical axis is set. It is the origin. As described above, in this embodiment,
The illuminance distribution is actually measured at an installation distance L using an optical fiber, and the halogen light bulb is positioned by confirming the light distribution characteristics and the light receiving angle. Therefore, it was manufactured as shown in FIGS. 4 and 5. The light distribution characteristics and the iso-illuminance distribution of the reflector-equipped bulb are ideally uniform in all directions.

Further, in the illuminance measuring device used in the method for manufacturing a light bulb with a reflecting mirror of this embodiment, several optical fibers are used, and the illuminance of light emitted from the emitting surface of each optical fiber is measured by an optical sensor. Therefore, since a large screen is not required unlike the conventional case, a large work space is not necessary.

In the above embodiment, the case where five optical fibers are used in the illuminance inspection device has been described, but the present invention is not limited to this, and the number of optical fibers may be five or more. Good. If more than five optical fibers are used, more sufficient measurement points can be obtained within the predetermined range.

Further, in the above embodiment, the case where the small halogen bulb is used as the light emitter of the bulb with a reflecting mirror has been described, but the present invention is not limited to this.
A discharge lamp or the like may be used as the light emitting body.

[0025]

As described above, according to the present invention, the light emitted from the light-emitting body is made incident on a plurality of optical fibers, and the illuminance of the light emitted from the emission surface of the optical fibers is measured. Since the light emitter can be positioned with respect to the reflecting mirror while confirming the light distribution characteristics of the light that has entered the optical fiber from the attached lamp, it is possible to reduce the variation in characteristics and improve reliability. A manufacturing method can be provided.

Further, as described above, according to the present invention, one optical fiber is provided at the center of the light-receiving surface and at least four optical fibers are arranged at the peripheral portion of the light-receiving surface with a predetermined interval, and the optical fiber. By providing a means for measuring the illuminance of the light emitted from the emission surface, it is possible to measure the luminous flux amount of the light that actually enters the optical fiber. It is possible to provide an illuminance inspection device capable of measuring illuminance and saving space as compared with a conventional method that requires a large screen.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a method of manufacturing a light bulb with a reflecting mirror that is an embodiment of the present invention.

FIG. 2 is a schematic front view of an optical fiber fixing fitting of an illuminance inspection device used in the manufacturing method.

FIG. 3 is a schematic sectional view of a light receiver of the illuminance inspection device.

FIG. 4 is a light distribution characteristic diagram of a light bulb with a reflecting mirror manufactured in this example.

FIG. 5 is an isolux curve diagram of the electric bulb with a reflecting mirror.

FIG. 6 is a schematic sectional view of a general electric bulb with a reflecting mirror.

FIG. 7 is a diagram for explaining a conventional method for manufacturing a light bulb with a reflecting mirror.

FIG. 8 is a schematic front view of the aperture of the illuminance inspection device used in the manufacturing method.

[Explanation of symbols]

 2 Illuminance inspection device 12 Optical fiber 14 Optical fiber fixing bracket 16 Light receiver 18 Meter 22 Optical fiber protection tube 24 Optical sensor 26 Diffusing plate 28 Fixing bracket 32 Screw 50 Reflector light bulb 52 Reflector 54 Halogen light bulb 62 Filament 64 Valve 66 Internal lead wire 68 External lead wire 72 Molybdenum foil 74 Terminal pin

Claims (2)

[Claims] 1. A method of manufacturing a light bulb with a reflecting mirror by arranging a light-emitting body in a reflecting mirror having a reflecting surface formed in the shape of a rotating quadric surface, wherein a plurality of reflectors are provided in front of the reflecting mirror. The light emitted from the light emitting body is made to enter the optical fiber to measure the illuminance of the light emitted from the emitting surface of the optical fiber, and the position of the light emitting body with respect to the reflecting mirror is adjusted so that the illuminance becomes a predetermined value. A method of manufacturing a light bulb with a reflector, characterized in that. 2. At least four optical fibers arranged at the center of the light-receiving surface and at a peripheral portion of the light-receiving surface with a predetermined interval, and the illuminance of light emitted from the light-emitting surface of the optical fiber. An illuminance inspection device comprising: a measuring unit.