JP2005209566A - Method of emitting light of light source to all directions, and its device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method by which light of a light source emitted in all directions can be seen from all positions of circumferences, and provide its device. <P>SOLUTION: The light of the light source was emitted in the all directions by reflecting the light by a hyperbolic face mirror. This realized the method by which the light of the light source can be recognized as the light of the light source of the same brightness from all positions of the circumferences, and the devices such as a signal light, a guide light and an illumination lamp are realized. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for radiating light omnidirectionally using a curved mirror to obtain a signal lamp, guide lamp, or illuminating lamp that can be seen from 360 degrees.

  Conventional signal lamps, such as flashlights, are provided with a reflecting mirror on the light source to irradiate light, or like a guide light, a diffuser plate with a specially processed glass or resin surface is provided around the light source to diffuse light. This is a method of expanding the visible range.

  An object of the present invention is to provide a method and apparatus for expanding the visible range by simply and efficiently emitting light from a light source.

  A hyperboloid mirror that emits light from the light source in all directions (360 degrees) was provided.

  The method and apparatus of the present invention are installed outdoors (for example, on streets) as fully self-contained signal lights, guide lights, and illuminating lights, and are used for guide lights to evacuation places and guidance of dangerous places in the event of a disaster.

  As an example of embodiment, a self-supporting signal light (guide light at the time of disaster) installed outdoors was realized. This device emits light emitted from a light source in all directions with a hyperboloidal mirror using electrical energy stored by a solar cell.

  Embodiments of the present invention will be described below with reference to the drawings. First, the hyperboloidal mirror, which is the most characteristic feature of the present invention, will be described with reference to the drawings and mathematical formulas, and then the principle of diffusion of light from the light source in all directions by the hyperboloidal mirror will be described. FIG. 1 is a diagram illustrating hyperbolic elements. FIG. 2 is a diagram for explaining diffusion by a hyperboloid.

双曲線上の点Ｍ（ｘｏ，ｙｏ）における接線の方程式は数２で表される。

双曲線上における接線及び法線はそれぞれ焦点半径のなす内角及び外角を二等分する。さらに双曲線の分岐が原点から遠ざかるに従い、限りなく近づいていく直線（漸近線）の方程式は数３で表されることになる。

A two-leaf hyperboloid is obtained by rotating a hyperbola. For this reason, “the tangent and normal on the hyperbola divide the inner angle and the outer angle formed by the respective focal radii (moving radius connecting the focal point and the tangent) into two equal parts”. Accordingly, the hyperbola is a locus of all points where the difference in distance to two given fixed points (focal points) F1 (o, c) F2 (o, −c) is constant.
AB (2b) is a real axis, A and B are vertices, O is a center, and focal points F1 and F2 are distances c from the center on the real axis. The hyperbolic equation is expressed by Equation 1.

The tangent equation at the point M (xo, yo) on the hyperbola is expressed by the following equation (2).

The tangent and normal on the hyperbola bisect the interior angle and the exterior angle formed by the focal radius, respectively. Furthermore, the equation of a straight line (asymptotic line) that approaches as much as the hyperbolic branch moves away from the origin is expressed by Equation 3.

Therefore, as shown in FIG. 2, by extending the center OC to the focal position of one hyperboloidal mirror, the extension of the optical path connecting the point P and the reflection position at the hyperboloidal mirror is the hyperboloid regardless of the position of the point P. It passes through the focal point OM of the mirror. The present invention applies this principle in reverse. In other words, if a diffused light source that irradiates the diameter of the hyperboloidal mirror is installed in the OC, the light from the light source is evenly diffused in all directions. Therefore, the light from the light source placed on the OC can be recognized as a light source having the same brightness from any position.

FIG. 3 is a structural diagram showing an example of an apparatus according to the present invention. Reference numeral 301 is a solar cell, 302 is a capacitor, 303 is a control circuit, 304 is a light sensor, 305 is a light source, 306 is a hyperboloid mirror, 307 is a transparent cover, 308 is a housing, 309 is a frame, and 310 is a base frame.

  301 is installed at the top of the apparatus, and an efficient power generation is performed by setting an inclination angle, and the generated electric energy is stored in 302. 304 detects the brightness of the surroundings, and when it becomes dark, the electric energy stored in 302 is supplied to 305 by the action of 303 and irradiates light upward from 305. Since the light emitted from 305 is emitted in all directions (360 degrees) at 306, it becomes a signal lamp that can be seen from any surrounding position.

  Reference numeral 307 denotes a cover that transmits light. 301, 302, 303, 304, 305, and 306 are accommodated in or attached to a housing 308, and 308 is connected to a gantry 309. 310 is a base frame integrated with 309, and is used to fix the apparatus at the installation location. In addition, since the apparatus of the present invention includes 301 and 302, it does not require the supply of electric energy from the outside. As described above, the apparatus of the present invention is self-supporting and has an integrated structure, so that it can be easily installed outdoors.

FIG. 4 is a block diagram showing an example of an apparatus according to the present invention. 401 is a solar cell, 402 is a capacitor, 403 is a light source, 404 is a light sensor, and 405 is a control circuit. The electric energy generated in 401 is stored in 402, and when dark, 404 is activated, and the electric energy stored in 402 is supplied to 407 by the action of 405 and light is emitted from 403.
405 performs power storage control from 401 to 402, control from 402 to 403, and light emission control of 403. In addition, since the power supply for 405 operation | movement uses the electric energy of 402, the supply from the outside is unnecessary.

It is a figure explaining the element to a hyperbola. It is a figure explaining the spreading | diffusion by a hyperboloid mirror. It is a structural diagram showing an example of an apparatus. It is a block diagram which shows an example of an apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 301 Solar cell 302 Capacitor 303 Control circuit 304 Light sensor 305 Light source 306 Hyperboloid mirror 307 Transparent cover 308 Case 309 Mounting frame 310 Base frame 401 Solar cell 402 Capacitor 403 Light source 404 Light sensor 405 Control circuit

Claims (6)

  A method of emitting light from a light source placed at a fixed point in all directions using a hyperboloidal mirror, a parabolic mirror, or a spherical mirror.   A method of radiating light from a light source in all directions using a hyperboloidal mirror, a parabolic mirror, or a spherical mirror, and making it a signal light, guide light, or illumination light that can be seen from 360 degrees.   A solar cell, a capacitor that stores the output of the solar cell, a light source that emits light at the output of the capacitor, a curved mirror that diffuses light from the light source in all directions, and a control circuit that electrically controls storage and emission A signal light, a guide light, and an illumination light characterized by comprising:   The signal lamp, the induction lamp, and the illuminating lamp according to claim 3, wherein the storage battery is of any type and content, such as a lead storage battery, a Ni-Cd battery, a nickel metal hydride battery, a lithium ion battery, and an electric double layer capacitor.   4. The signal light, guide light, and illumination light according to claim 3, wherein the light source is in any kind such as an incandescent light bulb, a halogen lamp, a high-intensity light bulb, and a high-intensity light emitting diode.   The signal lamp, guide lamp, and illumination lamp according to claim 3, wherein the curved mirror is a hyperbolic mirror, a parabolic mirror, or a spherical mirror.

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