JPH04210885A - light beam heating device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a light beam heating device used for heating for soldering, film removal of thin polyurethane wire, heating processing of resin, and the like.

Conventional technology In recent years, light beam heating devices have been used for soldering to circuit boards such as surface mount components, removing coatings from thin polyurethane wires, and heating processing of resins, as they are capable of stable localized heating without contact. and its usefulness is being recognized.

The configuration of a conventional light beam heating device will be explained with reference to FIGS. 3 and 4.

In FIG. 3, 11 is a light emitting lamp such as a xenon lamp, 12 is an elliptical reflector, 13 is a first focus of the ellipse reflector 12, 14 is a second focus, and the light emitting lamp 11 disposed at the first focus 13 The light energy radiated from the elliptical reflector 12 is reflected by the elliptical reflector 12 and focused near the second focal point 14. One end of an optical fiber 15 is arranged at this second focal point 14,
At the other end of the optical fiber 15, a condensing lens 17 is arranged to face the object with a lens boulder 16, and the light energy incident on one end of the optical fiber 15 is emitted from the other end, and the condensing lens 17 collects the object to be heated. 8 and irradiates the area, and heats the irradiated area.

In FIG. 4, an object to be heated 18 is placed near the second focal point 14 without using an optical fiber, and the object to be heated 18 is directly heated.

In order to effectively utilize the light energy emitted from the light-emitting lamp 11, the elliptical reflecting mirror 12 is a reflecting mirror that has good anti-fouling efficiency and excellent durability.

Problems to be Solved by the Invention Incidentally, in such a light beam heating device, the wavelength range in which light energy is used may differ depending on the purpose of use. For example, when using a light beam heating device for the purpose of soldering, light in the visible to infrared wavelength range is effective; light in the ultraviolet range often burns printed circuit boards; Better results can be obtained by blocking it.

On the other hand, in order to remove a heat-resistant film, light in the ultraviolet wavelength region is effective for decomposing polymer materials, and it is necessary to actively utilize wavelength components in the ultraviolet region.

As described above, a light beam heating device that merely takes into account the reflection efficiency of light energy has a problem in that it cannot effectively and efficiently heat the object depending on its characteristics and purpose of use.

SUMMARY OF THE INVENTION An object of the present invention is to provide a light beam heating device that can effectively and efficiently heat a target by using light energy in a wavelength range suitable for the target.

Means for Solving the Problems In order to solve the above-mentioned problems, a first aspect of the present invention includes a light-emitting lamp and an elliptical reflector, the light-emitting part of the light-emitting lamp is located at the first focus of the elliptical reflector, In a light beam heating device that heats an object to be heated with light focused on the second focal point of an elliptical reflector, the reflective surface of the elliptical reflector is configured with a plating layer of a metal material corresponding to the object to be heated. It is characterized by

In addition to the above configuration, a second aspect of the present invention further includes arranging one end of an optical fiber at the second focal point of the elliptical reflecting mirror, and arranging a cone-shaped reflecting mirror and a condensing lens at the other end of the optical fiber. A feature is that the reflecting surface of the cone-shaped reflecting mirror is made of a plating layer of a metal material corresponding to the object to be heated.

According to the present invention, light from a light-emitting lamp is reflected and focused by an elliptical reflector. At that time, the reflective surface of the elliptical reflector is made of a plating layer of a metal material that corresponds to the heating target, so that light energy with a wavelength suitable for the heating target is selectively reflected, making the heating target effective. and heats efficiently.

In addition, the light that enters from one end of the optical fiber placed at the second focal point and exits from the other end enters the condensing lens without waste through a cone-shaped reflecting mirror, and is condensed by the condensing lens. and irradiates the heated object. At this time, light energy of a wavelength suitable for the heating object is selectively reflected by the reflecting surface of the cone-shaped reflecting mirror, thereby effectively and efficiently heating the heating object.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

In FIG. 1, ■ is a light emitting lamp such as a xenon lamp, and 2 is an elliptical reflecting mirror. 3 is the first focus of the elliptical reflector 2, 4 is the second focus of the ellipse reflector 2, and the light energy emitted from the light emitting lamp 1 placed at the first focus 3 is reflected by the ellipse reflector 2. The light is focused toward the second focal point 4. An input end 5a at one end of the optical fiber 5 is disposed at the second focal point 4, and a cone-shaped reflecting mirror 6 and a condensing lens 7 are held inside at the output end 5b at the other end of the optical fiber 5. A holder 8 is attached, and the light energy incident on the input end 5a of the optical fiber 5 is transferred to the output end 5.
b, is reflected by the cone-shaped reflecting mirror 6, and enters the condensing lens 17 without waste, and the condensing lens 1
At 7, the light is focused and irradiated onto the object to be heated 9, and the irradiated area is heated.

The reflecting surface of the elliptical reflecting mirror 2 is made of a plating layer 11 of a metal material appropriately selected depending on the purpose of heating the object 9 to be heated, and the reflecting surface of the cone-shaped reflecting mirror 6 is also made of a similar metal material. It is composed of a plating layer 12. For the plating N11 and N12 constituting these reflective surfaces, for example, gold plating is selected for the purpose of heating for soldering, and aluminum plating is selected for the purpose of removing the insulating film of the polymer compound.

FIG. 2 shows the wavelength dependence of the reflection characteristics of various metal materials. As is clear from Figure 2, when infrared light energy is required, such as when heating soldering, the infrared energy can be used effectively by gold plating the reflective surface of the reflector. It can be used to block unnecessary energy in the ultraviolet region. In addition, when light energy in the ultraviolet region is required, such as when removing the insulation film of a polymer compound such as removing the film on a thin polyurethane wire, the reflective surface of the reflector can be aluminum plated. Even light energy can be used effectively.

In this way, in this embodiment, the necessary wavelength of light energy can be selected and used depending on the purpose of heating the object to be heated 9, and heating can be performed effectively and efficiently depending on the object to be heated. .

In the above embodiment, an example is shown in which the optical fiber 5 is used, but similarly to the conventional example shown in FIG. You can do it like this.

Further, in the above embodiment, an example was shown in which the plating layer 11 constituting the reflective surface of the elliptical reflector 2 was integrally formed, but a reflector in which the plating layer 11 is provided on the main body of the elliptical reflector 2 is shown. The body can be detachably attached, and an appropriate reflector can be optionally attached depending on the purpose of heating the object to be heated. Also, regarding the cone-shaped reflecting mirror 6,
It can be configured to be detachable from the holder 8 and the optical fiber 5, and can be configured to be replaced with one provided with a plating layer 12 made of an arbitrary metal material.

Effects of the Invention As described above, according to the present invention, the reflecting surface of the elliptical reflector is composed of a plating layer of a metal material corresponding to the object to be heated, so that light energy of a wavelength suitable for the object to be heated can be selectively applied. It is possible to provide a light beam heating device that can effectively and efficiently heat a heating target and has a wide range of applications.

Further, according to the second invention, when an optical fiber is used, the light emitted from the output end of the optical fiber can be efficiently heated by making it incident on the condensing lens without waste using the cone-shaped reflecting mirror, and The reflective surface of the cone-shaped reflecting mirror also selectively reflects light energy with a wavelength suitable for the heating target, so that the heating target can be heated effectively and efficiently.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the structure of a light beam heating device according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the wavelength dependence of reflection characteristics of various metal materials, and Fig. 3 is a conventional example of a light beam heating device. FIG. 4 is a block diagram of another conventional example of a light beam heating device that does not use an optical fiber. 1------------One-emission lamp 2---------
−−−−−−−−−−Elliptical reflector 5−−−−−−−−−
−−−−One optical fiber 6−−−=−・−1−−−−−−
- Cone-shaped reflecting mirror 7 - - - - - - - - - Condensing lens 9 - - Heated object day 8 - Patent attorney Ishihara Win Figure 1 Figure 3 Figure 2 Figure 4

Claims (2)

[Claims] (1) A light-emitting lamp and an elliptical reflector are provided, the light-emitting part of the light-emitting lamp is positioned at the first focus of the elliptical reflector, and the object to be heated is heated with the light focused at the second focus of the ellipse reflector. What is claimed is: 1. A light beam heating device, characterized in that the reflecting surface of the elliptical reflecting mirror is made of a plating layer of a metal material corresponding to the object to be heated. (2) Place one end of an optical fiber at the second focal point of the elliptical reflector, place a cone-shaped reflector and a condensing lens at the other end of the optical fiber, and place the reflective surface of the cone-shaped reflector on the heating target. 2. The light beam heating device according to claim 1, wherein the light beam heating device is constructed of a plating layer of a metal material corresponding to the above.