JP3237536B2 - Light beam heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light beam heating apparatus which enables local heating by condensing light from a light-emitting lamp. Alternatively, the present invention relates to a light beam heating device suitable for heating a synthetic resin.

[0002]

2. Description of the Related Art In recent years, light from a light-emitting lamp has been condensed by an elliptical reflecting mirror, incident on one end of an optical fiber, and light emitted from the other end has been condensed again using a lens mechanism. A light beam heating device for heating a non-heated object placed in a refrigerator has begun to be widely used as a non-contact local heating device for soldering electronic components or heating or welding resin.

Conventionally, this type of light beam heating apparatus is provided with a light-emitting lamp such as a xenon lamp that emits light in a wide wavelength range from ultraviolet wavelength light to infrared wavelength light, an elliptical reflecting mirror, an optical fiber, and a lens mechanism. In general, in addition to the above-described configuration, a configuration in which a concave lens is provided on an optical fiber only for the purpose of increasing the light collection density (see Japanese Patent Application Laid-Open No. H6-11921). Hereinafter, the configuration will be described with reference to FIG.

FIG. 3 shows the structure of a conventional light beam heating device. In FIG. 3, reference numeral 1 denotes a light-emitting lamp that emits light in a wide wavelength range such as a xenon lamp, 2 denotes an elliptical reflecting mirror, 3 denotes light generated from the light-emitting lamp, 4 denotes an optical fiber,
Reference numeral 4a denotes a light receiving surface of the optical fiber 4 for receiving the light condensed by the elliptical reflecting mirror 2, reference numeral 5 denotes an output end from which light incident from the optical fiber 4a is output, and reference numeral 6 denotes light re-collected from the output end 5. Lens mechanism.

In this conventional light beam heating apparatus, light 3 from a light emitting lamp 1 is condensed by an elliptical reflecting mirror 2, an optical fiber 4 is directly provided at the converging point, and a light receiving surface 4 of the optical fiber 4 is provided.
In this configuration, light is made incident on a, and light emitted from the emission end 5 is condensed again using the lens mechanism 6. Then, the non-heated object (not shown) placed at the light condensing point can be heated.

[0006]

In the above-described conventional light beam heating apparatus, the light receiving surface 4a of the optical fiber 4 on which the light condensed by the elliptical reflecting mirror 2 is exposed is exposed to the environment of use environment. The light receiving surface 4 of the optical fiber 4
Dust adheres to the surface a, and the dust absorbs light and promotes surface heat generation of the light receiving surface 4a of the optical fiber 4. In general, a light-emitting lamp such as a xenon lamp that emits light in a wide wavelength range from ultraviolet to infrared wavelengths is used. The optical fiber 4 is doped with a germanium compound in order to widen the aperture angle at which light can enter. Therefore, when this is exposed to the ultraviolet light in the light 3 emitted from the light-emitting lamp 1, the light is transformed and the light transmittance is reduced. As a result, there is a problem that the light receiving surface 4a of the optical fiber 4 is deteriorated, and it becomes impossible to transmit stable light.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a light beam heating apparatus capable of suppressing deterioration of an optical fiber and transmitting stable light.

[0008]

In order to achieve the above object, a first means of the present invention is to provide a light emitting lamp, an elliptical reflecting mirror for condensing the light, an optical fiber, and an emitting end of the optical fiber. A light beam heating device equipped with a lens mechanism,
The optical fiber is provided with optical means for transmitting light other than ultraviolet light on the light receiving surface of the optical fiber.

[0009] The first means of the present invention is a light beam heating apparatus provided with an optical means that transmits light other than ultraviolet light on a light receiving surface of an optical fiber and converts condensed light into parallel light.

[0010]

According to the above construction, the first means of the present invention has an optical means for transmitting light other than ultraviolet light on the light receiving surface of the optical fiber. In addition to preventing the generation of dust and preventing the incidence of ultraviolet rays, heat generation on the light receiving surface of the optical fiber and a decrease in light transmittance can be prevented, so that deterioration of the optical fiber can be suppressed and stable light can be transmitted. It has the action of: In the second means of the present invention, the optical means of the first means, which transmits light other than ultraviolet light, is made optical means for converting incident light into parallel light. In addition to preventing dust from entering, the ultraviolet light is not incident, and the incident light of the optical fiber is made parallel light, so that the heat generation on the light receiving surface of the optical fiber and the decrease in light transmittance are prevented,
In addition, since the effective use rate of light incident on the lens mechanism can be increased, the effect of suppressing deterioration of the optical fiber, transmitting stable light, and increasing the light collection density can be obtained.

An embodiment of the present invention will be described below with reference to FIGS. (Embodiment 1) FIG. 1 shows Embodiment 1 of the present invention.
Reference numerals 1, 2, 3, 4, 4a, 5, and 6 are the same as those of the conventional light beam heating device, and thus description thereof is omitted. Reference numeral 7 denotes an optical unit that transmits light other than ultraviolet light. Hereinafter, the operation of the first embodiment will be described. The light 3 from the light emitting lamp 1 is condensed by the elliptical reflecting mirror 2, and the light receiving surface 4a of the optical fiber 4 is placed on the light receiving surface 4a of the optical fiber 4 so that the light receiving surface 4a is not exposed to the use environment atmosphere. The optical means 7 is arranged, the light transmitted through the optical means 7 is made incident on the light receiving surface 4 a of the optical fiber 4, and the light emitted from the emission end 5 is condensed again using the lens mechanism 6. Then, a non-heated object (not shown) placed at the light condensing point can be heated.
As described above, according to the first embodiment, dust adheres to the light receiving surface 4a of the optical fiber 4, the dust absorbs light, and promotes surface heat generation of the light receiving surface 4a of the optical fiber 4, or The light receiving surface 4a of the optical fiber 4 is not deteriorated such that the optical fiber 4 is deteriorated or the light transmittance is reduced by being exposed to the ultraviolet light in the light 3 generated from the light emitting lamp 1. , Can transmit stable light.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIG.

In FIG. 2, reference numerals 1, 2, 3, 4, 4
Since a, 5, and 6 are the same as those of the conventional light beam heating apparatus of FIG. 3, the description is omitted. Reference numeral 7A denotes an optical unit that transmits light other than ultraviolet light and converts incident light into parallel light.

The operation of the light beam heating apparatus configured as described above will be described. The light 3 from the light emitting lamp 1 is condensed by the elliptical reflecting mirror 2, and the light receiving surface 4a of the optical fiber 4 is placed on the light receiving surface 4a of the optical fiber 4 so that the light receiving surface 4a is not exposed to the use environment atmosphere. The optical means 7A is disposed, the parallel light transmitted through the optical means 7A is made incident on the light receiving surface 4a of the optical fiber 4, and the parallel light emitted from the emission end 5 is refocused using the lens mechanism 6. Then, a non-heated object (not shown) placed at the light condensing point can be heated. According to the second embodiment, dust adheres to the light receiving surface 4a of the optical fiber 4, and the dust absorbs light, which promotes surface heat generation of the light receiving surface 4a of the optical fiber 4, and further increases the emission lamp. The light receiving surface 4a of the optical fiber 4 such that the optical fiber 4 is deteriorated or its light transmittance is reduced by being exposed to the ultraviolet light in the light 3 emitted from the light 3
Is not deteriorated, and the effective use rate of light incident on the lens mechanism 6 can be increased, so that stable light can be transmitted and the light collection density can be increased.

[0015]

As is apparent from the above description, according to the first means of the present invention, dust adheres to the light receiving surface of the optical fiber, the dust absorbs light, and the surface of the light receiving surface of the optical fiber is exposed. It does not deteriorate the light receiving surface of the optical fiber, such as promoting heat generation or deteriorating the optical fiber or reducing the light transmittance by being exposed to the ultraviolet light in the light emitted from the light emitting lamp. This provides an excellent effect of providing a light beam heating device capable of transmitting stable light. Further, according to the second means of the present invention, the first means
Since the optical means of the means is further configured as an optical means for converting the light incident on the optical fiber into parallel light, the effective use rate of the light incident on the lens mechanism is increased, and the condensing density can be increased, so that high efficiency can be achieved. This provides an excellent effect of providing a light beam heating device.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a light beam heating device according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a light beam heating device according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a conventional light beam heating device.

[Explanation of symbols]

 4 Optical fiber 4a Light receiving surface 7, 7A Optical means

────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuyuki Hashi, Inventor 1006 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-8-136739 (JP, A) JP-A-6-106 111921 (JP, A) JP-A-7-13025 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05B 3/00 B23K 1/005 G02B 6/42

Claims (2)

(57) [Claims] 1. A light beam heating device comprising a light emitting lamp, an elliptical reflecting mirror for condensing the light, an optical fiber for transmitting the condensed light, and a lens mechanism at an output end of the optical fiber. A light beam heating device comprising an optical means for transmitting light other than ultraviolet light on a light receiving surface of an optical fiber. 2. A light beam heating apparatus comprising a light emitting lamp, an elliptical reflecting mirror for condensing the light, an optical fiber for transmitting the condensed light, and a lens mechanism at an output end of the optical fiber. A light beam heating apparatus having an optical means for transmitting a wavelength hole other than ultraviolet rays on a light receiving surface of an optical fiber and converting collected light into parallel light.