JP5876740B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device including a plurality of light sources.

  Conventionally, in an illuminating device having a plurality of light sources, a plurality of laser light emitting units are linearly arranged at an equal pitch, and this emitted light is converted into a parallel luminous flux in one direction by a cylindrical lens array. It is an apparatus that converges on the incident side end face of the kaleidoscope (see, for example, Patent Document 1).

JP 2002-184206 A

  However, in the above conventional example, when irradiating an object to be irradiated with light from a plurality of light sources, the optical axes of the respective light sources do not collect at one point, so that the light condensing performance is reduced, and the parallelism for emitting parallel light thereafter is obtained. As a result, there is a problem that light hardly reaches far, and the amount of light reaching the irradiated object is uneven.

  In the present invention, when irradiating an object to be irradiated with light from a plurality of light sources, the condensing property of the light emitted from each light source is improved, and the parallelism of the light emitted thereafter is improved. An object of the present invention is to provide an illuminating device in which light from a light source can easily reach far and the amount of light reaching an irradiated object is uniform.

An illumination device according to the present invention includes a plurality of light sources arranged on a curve whose position is determined based on a spherical aberration amount of a collimator lens, and a spherical lens that receives light from one of the plurality of light sources. And a converging lens for converging the light emitted from the spherical lens, a plurality of units each including one light source, one spherical lens, and one converging lens are provided, and the collimator lens Is a spherical lens that adjusts the focus of each light emitted from each of the units.

  According to the present invention, when irradiating an object to be irradiated with light from a plurality of light sources, the condensing property of the light emitted from each light source is improved, and the parallelism of the light emitted thereafter is improved. Light from a plurality of light sources can easily reach far, and the amount of light reaching the irradiated object is uniform.

It is a figure which shows the illuminating device 100 which is Example 1 of this invention. It is a figure which shows the unit U1 in the light emitting element illuminating device 100. FIG. It is a figure which shows the illuminating device 200 which is Example 2 of this invention. It is a figure which shows the illuminating device 300 which is Example 3 of this invention. It is a figure which shows the illuminating device 400 which is Example 4 of this invention. It is a figure which shows the illuminating device 500 which is Example 5 of this invention. It is a figure which shows the illuminating device 600 which is Example 6 of this invention. It is a figure which shows the illuminating device 700 which is Example 7 of this invention.

  The modes for carrying out the invention are the following examples.

  FIG. 1 is a diagram illustrating an illumination apparatus 100 that is Embodiment 1 of the present invention.

  The illuminating device 100 includes an LED fixing base 10, LEDs 21, 22, and 23, three ball lenses 41, 42, and 43, three focusing lenses 51, 52, and 53, and one collimator lens 60. Yes.

  The LED fixing base 10 has a curve 11 on a concave spherical surface. The curve 11 on the concave spherical surface is a perfect circle arc, and the LEDs 21, 22, and 23 are arranged on the curve on the concave side of the perfect circle arc.

  Note that other light emitting elements such as LDs may be used instead of the LEDs 21, 22, and 23.

  The spherical lenses 41, 42, and 43 receive light from the LEDs 21, 22, and 23, respectively, and the light emitted from the spherical lenses 41, 42, and 43 is concentrated at one point. A convex lens and a concave lens may be used instead of the spherical lenses 41, 42, and 43. That is, a spherical lens may be used instead of the spherical lenses 41, 42, and 43.

  The focusing lenses 51, 52, and 53 are lenses that focus the light emitted from the spherical lenses 41, 42, and 43, respectively.

  Further, one unit is constituted by one LED, one cylindrical member (see FIG. 2), one spherical lens, and one focusing lens, which will be described later. That is, the unit U1 is configured by the LED 21, the cylindrical member 31, the spherical lens 41, and the focusing lens 51, and the unit U2 is configured by the LED 22, the cylindrical member (not shown), the spherical lens 42, and the focusing lens 52. The unit U3 includes an LED 23, a cylindrical member (not shown), a spherical lens 43, and a focusing lens 53.

  The light emitted from each of the units U1, U2, and U3 gathers at one point P, and the collimator lens 60 adjusts the focal point of each collected light.

  In addition, the color of the light which LED21, 22, 23 radiate | emits is the same. This color may be colored or colorless (white).

In the first embodiment, the LEDs 21, 22, and 23 are arranged on the curved surface 11 on the concave spherical surface , but may be provided in one cross section of the concave spherical surface .

  The collimator lens 60 is an aspheric lens.

  FIG. 2 is a diagram showing the unit U1 in the light emitting element illumination device 100. As shown in FIG.

  The unit U1 includes an LED 21, a cylindrical member 31, a spherical lens 41, and a focusing lens 51.

  The cylindrical member 31 is entirely cylindrical and has a through hole 31a and an inclined surface 31b. The through hole 31a is provided at the center of the cylindrical member 31, and the LED 21 is provided in the through hole 31a. The inclined surface 31b is a surface in which the right end portion of the cylindrical member 31 in FIG. A spherical lens 41 is in contact with the inclined surface 31b. The left end of the cylindrical member 31 is fixed to the concave surface 11 in FIG.

  Although not shown, another cylindrical member corresponding to the cylindrical member 31 (the cylindrical member corresponding to the LEDs 22 and 23) is provided between the curved surface 11 on the concave spherical surface and the spherical lens 42, and the curved surface on the concave spherical surface. 11 and the ball lens 43.

  Next, the operation of the above embodiment will be described.

  First, the light emitted from the LED 21 is received by the spherical lens 41, and the light emitted from the spherical lens 41 gathers at one point P, and then becomes parallel light by the collimator lens 60.

  Similarly to the above, the light emitted from the LED 22 is received by the spherical lens 42, and the light emitted from the spherical lens 42 gathers at one point P, and then becomes parallel light by the collimator lens 60. Similarly to the above, the light emitted from the LED 23 is received by the spherical lens 43, and the light emitted from the spherical lens 43 gathers at one point P, and then becomes parallel light by the collimator lens 60.

  And the parallel light made with the light emitting element illuminating device 100 advances toward a predetermined irradiated body, and illuminates the irradiated body.

  According to the first embodiment, when irradiating an object to be irradiated with light from a plurality of light sources, the optical axis of each light source is concentrated at one point P, so that the light condensing property is improved, and thus obtained thereafter. The parallelism of light is improved. Therefore, according to Example 1, light from a plurality of light sources can easily reach far, and the amount of light reaching the irradiated object is uniform.

  In the first embodiment, the spherical lenses 41, 42, and 43 are provided, but instead of these, a convex lens other than the spherical lens may be provided.

  Mixing means for mixing light may be provided before or after the collimator lens 60. As the mixing means, various means such as a permeable material having fine bubbles, frosted glass, and the like can be considered. By using the mixing means, when the light emitted from the collimator lens 60 is irradiated to the irradiated means such as a wall, the brightness of the irradiated light becomes uniform. Further, if the collimator lens 60 has a fine bubble, the collimator lens 60 itself has a mixing function.

  FIG. 3 is a diagram showing an illumination apparatus 200 that is Embodiment 2 of the present invention.

  The lighting device 200 is an example in which the moving device 70 is included in the lighting device 100.

  The moving means 70 is means for moving the collimator lens 60 in the optical axis direction. Specifically, the collimator lens 60 is advanced and retracted in the optical axis direction by a piezoelectric element, an ultrasonic motor, or the like.

  When the collimator lens 60 is moved in the axial direction by the moving means 70, the focus of the light generated by the LEDs 21, 22, and 23 can be adjusted.

  FIG. 4 is a diagram illustrating an illumination apparatus 300 that is Embodiment 3 of the present invention.

  The illumination device 300 is an embodiment in which, in the illumination device 100, a red light emitting LED 21r, a green light emitting LED 22g, and a blue light emitting LED 23b are provided instead of the LEDs 21, 22, and 23 that emit monochromatic light. . Thereby, light of colors other than white can be emitted.

  FIG. 5 is a diagram showing an illumination apparatus 400 that is Embodiment 4 of the present invention.

  The illumination device 400 is an embodiment having luminance control means 80r, 80g, and 80b for individually controlling the luminance of light generated by the red LED 21r, the green LED 22g, and the blue LED 23b in the illumination device 300.

  The luminance control means 80r, 80g, and 80b individually control the luminance of the color of the light generated by the LEDs 21r, 22g, and 23b, thereby generating tens of thousands of colors of light. Note that if only the LED 21r emits light, red monochromatic light is generated, if only the LED 22g emits light, green monochromatic light is generated, and if only the LED 23b emits light, blue monochromatic light is generated.

  FIG. 6 is a diagram showing an illumination apparatus 500 that is Embodiment 5 of the present invention.

  The illumination device 500 is basically the same as the illumination device 100, but is an embodiment in which LEDs 24, 25 are provided in addition to the LEDs 21, 22, 23.

  In this case, five units are provided, and the light emitted from the five units gathers at one point P, and the collimator lens 60 adjusts the focus of each collected light. Same as the case.

  In the lighting device 500, six or more LEDs may be provided.

  FIG. 7 is a diagram showing an illumination apparatus 600 that is Embodiment 6 of the present invention.

  The illumination device 600 is basically the same as the illumination device 500 except that the LEDs are arranged on the concave spherical surface 12 instead of being arranged on the curved surface 11 on the concave spherical surface. The difference is that a large number of LEDs are arranged. In addition to the LEDs 21, 22, 23, many LEDs 20, 20,... Similar to the LEDs 21, 22, 23 are arranged on the concave spherical surface 12. In addition, corresponding to each of the LEDs 21, 22, 23, 20, 20,..., Spherical lenses 41, 42, 43, 40, 40,. , 40,... Are provided with focusing lenses 51, 52, 53, 50, 50,. However, in FIG. 7, the spherical lenses 41, 42, 43, 40, 40,... And the focusing lenses 51, 52, 53, 50, 50,. The spherical lens 40 is the same as the spherical lenses 41, 42, and 43, and the focusing lens 50 is the same as the focusing lenses 51, 52, and 53.

  In addition, by arranging a large number of LEDs 21, 22, 23, 20, 20,... On the concave spherical surface 12, the amount of light emitted by the lighting device 600 increases dramatically. Also in this case, the light emitted from the LEDs 21, 22, 23, 20, 20,... Is received by the corresponding ball lenses 41, 42, 43, 40, 40,. .., 40, 40,... Converges to one point P, and a collimator lens 60 (not shown in FIG. 7) converges the light emitted from each of the focusing lenses 51, 52, 53, 50, 50,. It is made parallel light, or the focus of each light emitted from the focusing lenses 51, 52, 53, 50, 50,.

  FIG. 8 is a diagram showing an illumination apparatus 700 that is Embodiment 7 of the present invention.

  The illuminating device 700 is basically the same as the illuminating device 100, but an LED fixing base 10a is provided instead of the LED fixing base 10, and a free curve 11a is provided instead of the curve 11 on the concave spherical surface. A collimator lens 60a, which is a spherical lens, is provided instead of the collimator lens 60, which is an aspheric lens, and the spherical aberration amount S.I. This is an embodiment in which only the length A is moved.

  It should be noted that the amount of spherical aberration S.I. A is the amount of aberration due to the spherical surface of the spherical lens. The free curve 11a is a curve whose position is determined based on the spherical aberration amount SA of the collimator lens 60a.

  That is, the illumination device 100 uses an arc as the curve 11 on the concave sphere, places the LEDs 21, 22, and 23 on the curve 11 on the concave sphere, and uses an aspheric lens as the collimator lens 60. Yes. Instead of doing this, like the lighting device 700, the free curve 11a is used, the LEDs 21, 22a, and 23 are placed on the free curve 11a, and the collimator lens 60a is a spherical lens. You may make it do.

  That is, the LEDs 21 and 23 are arranged on a circumference with a predetermined radius centered on the point P, and the spherical aberration amount S.P. 8, the point moved leftward in FIG. 8 is defined as a point P1, and the LED 22a is disposed on the circumference of the predetermined radius with the point P1 as the center. A spherical lens 42 a corresponding to the spherical lens 42 and a focusing lens 52 a corresponding to the focusing lens 52 are arranged. The LED 22a, the spherical lens 42a, and the focusing lens 52a constitute a new unit, and the light emitted from the new unit is focused at the point P1 and sent to the collimator lens 60a, which is a spherical lens. Emits light.

  This concept may be applied to the light emitting element illumination devices 200, 300, 400, 500, and 600.

  When the above concept is applied to the light emitting element illumination device 500, the LEDs 21, 22, 23, 25, and 26 are arranged on a free curve, and a collimator lens 60a that is a spherical lens is used. As shown in FIG. 8, the free curve 11a is provided on the LED fixing base 10a, and there are two points P and P1, which are focal points. The free curve 11a is a curve whose position is determined based on the spherical aberration amount SA of the collimator lens 60a.

  On the other hand, in the device in which the above-described concept is applied to the light emitting element illumination device 500, the LED fixing base has a free curve different from the free curve 11a. The free curve is a curve whose position is determined based on the spherical aberration amount SA of the collimator lens 60a, and is a curve corresponding to the LEDs 21, 22, 23, 25, and 26.

  When the above concept is applied to the light emitting element illumination device 600, in addition to the LEDs 21, 22, 23, 25, 26, the LEDs 20, 20,... Are also arranged on the concave aspheric surface, and the collimator lens 60a which is a spherical lens. Is used.

  An aspherical surface may be an aspherical surface other than an aspherical surface whose cross section is a parabola.

100, 200, 300, 400, 500, 600, 700 ... lighting device,
11 ... Curve on concave sphere,
21, 22, 23, 20 ... LED,
31 ... Cylinder member,
41, 42, 43 ... spherical lenses,
51, 52, 53 ... focusing lens,
60 ... Collimator lens,
70 ... moving means,
80r, 80g, 80b ... brightness control means.

Claims (6)

A plurality of light sources arranged on a curve whose position is determined based on the amount of spherical aberration of the collimator lens;
A spherical lens that receives light from one of the plurality of light sources;
A focusing lens for focusing the light emitted from the spherical lens;
A plurality of units including one light source, one spherical lens, and one focusing lens,
The illumination device according to claim 1, wherein the collimator lens is a spherical lens that adjusts a focus of each light emitted from each of the units. In claim 1 ,
The illuminating device, wherein the spherical lens is a spherical lens. In claim 1 ,
An illuminating device comprising a moving means for moving the collimator lens in an optical axis direction thereof. In claim 1 ,
The illumination device according to claim 1, wherein the light source is a monochromatic light source or a multi-color light source. In claim 2 ,
A lighting device comprising a luminance control means for individually controlling the luminance of the light sources of the plurality of colors. In claim 1 ,
An illumination device comprising mixing means for mixing light before and after the collimator lens or in the collimator lens.

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