Optical fiber irradiation device

Abstract

The subject of the present invention is to provide an optical fiber irradiation device capable of effectively using the light beam from an LED light source to irradiate with sufficient illuminance. To solve the problem, the present optical fiber irradiation device is provided with an optical fiber light source mechanism. The optical fiber light source mechanism is configured in such a manner that an optical fiber is interfaced with a spacer, existed between the optical fiber and a lens, via a state that an optical fiber base mounted on an LED substrate is not restricted, and a light incidence terminal face is opposite to the lens in front of the LED light source mounted on the LED substrate. The optical fiber is fixed to the optical fiber base in a state that the spacer abuts against the front of the LED light source or the lens. As a result, a structure is provided to regulate the separated distance between the front of the LED light source and the light incidence terminal face of the optical fiber.

Description

technical field [0001] The present invention relates to, for example, an optical fiber irradiation device that irradiates an object to be irradiated in point form with ultraviolet light from an LED light source via an optical fiber. Background technique [0002] For example, light irradiation treatment is performed to cure adhesives, paints, inks, and resists that are sensitive to ultraviolet light (wavelength) by using ultraviolet light in the range of 300nm to 400nm with a wavelength centered at 365nm (hardened) or dried, or conversely melted or softened, etc. [0003] In such light irradiation processing, it is often required to irradiate minute areas with ultraviolet light, for example, in the bonding of pickup lenses for optical discs and the bonding of electronic components to substrates. As the ultraviolet light irradiation device that is used for carrying out this kind of light irradiation treatment, the device of the following structure is known: for example, make ...

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Problems solved by technology

For example, as an LED light source, cooling is required in order to avoid the reduction of the luminous efficiency of the LED element. The substrate itself tends to have large tolerances, so when the optical fiber is positioned relative to, for example, the LED substrate on which the LED package is placed, the distance between the LED light source and the light incident end face of the optical fiber will vary.

In this way, if the distance between the LED light source and the light incident end face of the optical fiber varies, the amount of light incident on the optical fiber will vary and the light collection efficiency on the lens will change, making it impossible to effectively use the light from the LED light source.

[0008] In addition, in the structure in which the light radiated from the LED light source is condensed by a glass lens or the like and injected into an optical fiber, the above-mentioned problems also arise due to, for example, the positional deviation of the lens.

[0009] On the other hand, in order to avoid this kind of problem, it is also considered to arrange the optical fiber and the LED light source in contact with each other. However, because the optical fiber is sometimes replaced according to the application, in the device of this structure, it is easy to cause the incident light to be caused by the light emitted by the optical fiber. The problem of attenuation caused by damage to the input end face

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