JPS6042709A - Irradiating method - Google Patents

Abstract

PURPOSE:To generate many intermittent lights by a small energy by constituting so that a light whose irradiating position is moved is irradiated to each input terminal of plural optical fibers, and the intermittent light is radiated from each output terminal of them. CONSTITUTION:For instance, a light from a light source 1 is concentrated by a condensing lens 4, its concentrated light is supplied to an input terminal of an optical fiber 5, and the light is radiated from each output terminal of the other terminal. Since an intermittent light is generated, the light source 1 is rotated, and a focus part to which the light is concentrated is shifted and moved on one circumference. Each input terminal of plural optical fibers 5 is placed on its circumference, by which a flickering light is obtained from each output terminal of the optical fiber. In this way, many intermittent lights can be generated by a small energy consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an irradiation method, and more particularly to a method in which a light beam is inputted from the input end of an optical fiber and an intermittent light beam is emitted from the output end.

Various methods have been put into practice to generate intermittent light beams, and the first and simplest method is a method in which an electric lamp, which serves as a light source for irradiation, is turned on and off by a power source, causing it to blink.

However, this method requires repeated heating and cooling of the filament of the electric lamp, and if the number of interruptions is large, the life of the electric lamp will be shortened. Further, when it is desired to shorten the blinking interval, the heating rate and cooling rate of the filament are rate-determining, and it is impossible to shorten the blinking interval in large-capacity electric lamps, and the power required to raise the temperature of the filament is also lost.

As a second method, the irradiation of the light source is made continuous, in which a shielding object is movably installed in front of the light source, and the shielding object is moved by rotation or vibration, and the shielding is repeated. There is a method. FIG. 1 shows a diagram of its principle.

In this case, by changing the rotation speed of the shielding plate and the area of the shielding part, it is possible to arbitrarily set the number of intermittent intervals of 9, and the condition of the light source is also constant, so the life of the filament can be maintained as in the first method. There are no problems. However, in this method, even when the light beam is cut off, the power supply remains on, and power is wasted, resulting in considerable energy loss depending on the application.

As a third method, a flash discharge tube is used, but the lifespan of a discharge tube is about several thousand to tens of thousands of times, and it is not suitable for purposes that require intermittent light beams of millions to tens of millions of times. Basolateral, inappropriate.

Conventionally used methods for generating intermittent light rays had problems such as limitations on the lifespan of the light source, limitations on the number and interval of intermittent light beams, and large energy losses, but the present invention provides a method to eliminate all of these. A method is provided.

This invention provides blinking light irradiation in which each input end of a plurality of optical fibers arranged is irradiated with a light beam whose irradiation position is sequentially moved, and intermittent light rays are emitted from each output end of the optical fiber. It's a method. The method of the invention is carried out either by a method in which the light source is moved, or by a method in which the light source is not moved and an optical system such as a lens, mirror, prism, etc. is moved.

An overview of how the light source is rotated is shown in FIG. In this method, light from a light source is focused on a condenser lens, the focused light is supplied to an input end of an optical fiber, and light is emitted from each output end of the optical fiber.

In order to generate the intermittent light beam, the light source is subjected to a rotational movement, and the focal point, where the light beam is concentrated, moves around a circumference.

By arranging each input end of a plurality of optical fibers on the circumference, blinking light can be obtained from each output end of the optical fiber.

Since the light source is moved in this method, there are problems with the connection between the power source and the light source, and since the light source is of a certain size, the circumference over which the focal point moves is not more than a certain angle. , cannot be made smaller.

Therefore, the usable range of the number of optical fibers used or the intensity of light beams becomes smaller.

An overview of another method of the invention is shown in FIG. In this method, the light source is not rotated, but instead an optical system consisting of lenses, prisms, mirrors, etc., concentrating the light rays from the light source and changing direction, is rotated to generate intermittent light rays.

In the rotating plane mirror type intermittent light generation method shown in Fig. 3, the light rays from the light source are focused by a condensing lens, and a plane mirror is movably installed at a position closer to the lens than the focal point, and the light rays are It is reflected and its direction is changed.

A plane mirror is rotated about a central axis parallel to the direction of the light beam from the light source, and the focal point of the light beam moves on a circumference.

Each input end of a plurality of optical fibers is arranged on the circumference, and an intermittent light beam is obtained from each output end of the optical fiber.

In this method, the light source is not moved, so there is no problem with connecting it to the power source, the moving part is an optical system and is relatively small, and the size of the circumference of the moving focal point is quite flexible. can be selected.

In the following, the case where the light beam from the light source turns around the light source and the input end of the optical fiber is illuminated is explained, but the arrangement of each input end of the optical fiber needs to be specified as being on the circumference. - They may be arranged in a straight line, and the focal point may be moved back and forth in a straight line;
Any method of arrangement and method of movement of the light source may be employed.

The effects obtained by the method of this invention are summarized as follows.

(a) The state of the light source may be constant, it is unnecessary to blink the light source itself, and the lifetime of the light source is significantly extended. For example, if the method of the present invention causes the light source or optical system to rotate 10 times per second and generates an intermittent light beam from an optical fiber for 10,000 hours, 3.
Intermittent light beams will be generated and irradiated 600 million times. Incidentally, the lifespan of a flash discharge tube is approximately several thousand to several tens of thousands of times.

(b) Most of the light beam from the light source is converted into intermittent light beams, resulting in significant energy savings compared to conventional methods. For example, if according to the method according to the invention 100 optical fibers are arranged around the circumference of the focal point to generate an intermittent beam, the power usage ω will be reduced compared to the method in which a shielding object is used. It becomes 1/100.

(c) Multiple interrupted light beams can be generated by one light source. In this invention, intermittent light beams are generated by arranging optical fibers on the circumference of the focal point, so by determining the number of optical fibers, thousands to tens of thousands of intermittent light beams can be obtained from a single light source. It will be done.

(d) Intermittent light beams are obtained at locations isolated from the light source. In this invention, an optical fiber is used for transmitting the intermittent light beam, and since the attenuation of the light beam is small, the intermittent light beam can be transmitted to a considerably isolated place.

Further, since the arrangement of the output end of the interrupted light beam of each optical fiber can be arbitrarily selected, interrupted light beams can be obtained at many desired positions.

(e) The intensity of the light beam can be easily adjusted. Since a condensing lens is used in this invention, the intensity of the intermittent light beam can be adjusted not only by adjusting the intensity of the light source itself but also by adjusting the degree of convergence of the condensing lens. , the intensity of the intermittent light beam is adjusted 1q.

(f) Intermittent light beams can be applied only to desired and necessary locations. Because the eave fiber is used to transmit the light beam,
When the intermittent light beam is applied, the output end can be brought sufficiently close to the object to be irradiated as required, making it possible to irradiate only a limited spatial area.

(0) Unnecessary thermal energy is difficult to be transmitted to the irradiation space, and the light source can be easily cooled.

There are various methods for generating intermittent light rays according to the principles of the method of this invention, depending on combinations of light sources, mirrors, lenses, prisms, etc. Some methods other than those shown in FIG. 3 are illustrated in FIGS. 4-9. Fourth
The one shown in the figure is a rotating prism lens system.
Light rays from a light source are redirected by a prism, concentrated by a condenser lens, and supplied to an optical fiber.

In this case, the integrated part of the prism and the condensing lens is rotated, and an intermittent light beam is generated at the output end of the optical fiber.

The one in Fig. 5 is a concave mirror condensing one-rotation plane mirror system, in which the light rays from the light source are concentrated by a concave mirror, and the plane mirror is installed at a focal point near the concave mirror, and the light rays are reflected. Each input end of the optical fiber is placed at the focal point of the reflected light, and the plane mirror is rotated to generate an intermittent light beam at each output end.

The one in Figure 6 is a concave mirror, a concave lens, and a condensing single-rotation prism.
It is a lens type, in which the light rays are concentrated by a concave mirror, the light rays are converted into parallel light beams by a concave lens, the direction is changed by a prism, the condensing lens concentrates the light rays, and the light rays are irradiated to the input end of each optical fiber. Then, the part where the prism and the condensing lens are integrated is prevented from rotating, thereby generating intermittent light beams from each output end.

The one in Figure 7 is a concave-convex mirror condensing rotating plane mirror system.
A concave mirror and a convex mirror concentrate the light beam, and a rotating plane mirror illuminates each input end of the optical fiber, producing an intermittent light beam from each output end.

The one in Figure 8 is a rotating double-sided reflective plane mirror system, in which light rays from both directions are concentrated by a condensing lens, are reflected by a rotating double-sided reflective plane mirror, are irradiated to each input end of the optical fiber, and are transmitted intermittently from each output end of the optical fiber. A ray of light is generated.

The one in Figure 9 is a rotating prism lens system, in which light rays from both directions are redirected by the prism and irradiated to each input end of the optical fiber through a condensing lens, and are intermittently transmitted from each output end of the optical fiber. A ray of light is generated. In addition to various electric lights, lasers, sunlight, electric arcs, etc. can be used as light sources.

As described above, the intermittent light irradiation method according to the present invention generates a large number of intermittent light beams with small energy consumption, and is particularly effective when these intermittent light beams are used at a large number of predetermined positions. There are many fields of application.

Plant cultivation in spaces where it is difficult to directly obtain natural light is also a suitable application for the irradiation method of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the principle of a known intermittent light ray irradiation method using a shielding disk method, Fig. 2 is a principle diagram of a method of generating an intermittent light ray using a rotating light source method, and Fig. 3 is a diagram showing the principle of an intermittent light irradiation method using a rotating plane mirror method. Figures 1 and 4 are diagrams of the principle of how light rays are generated.
It is a principle diagram of a method of generating intermittent light beams using a lens method,
The figure is a principle diagram of the method for generating intermittent light beams using a concave mirror condensing 9-rotation plane mirror method, FIG. This is a principle diagram of the intermittent ray generation method using a concave and convex mirror condensing single-rotation plane mirror method. FIG. 8 is a principle diagram of the intermittent ray generation method using a rotating double-sided reflecting plane mirror method. FIG.・This is a lens-based intermittent light generation method. 1. Light source 2, rotating shielding plate 3, motor 4, condensing lens 5, optical fiber 6, rotating plane mirror 7, prism 8, concave mirror 9, concave lens 10, convex mirror Applicant: Toyo Engineering Co., Ltd.; 172121

Claims (1)

[Claims] An irradiation method characterized in that each input end of a plurality of optical fibers arranged is irradiated with a light beam whose irradiation position is sequentially moved, and intermittent light rays are emitted from each output end of the optical fiber. .