JP2018006136A - Floodlight device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floodlight device which can inhibit a solid light source element from communicating with outer air.SOLUTION: A floodlight device includes: a solid light source element which emits light; an optical element into which the light emitted from the solid light source element enters and which emits the light to the outside of the device; a first housing which houses the solid light source element; and a second housing which houses the optical element. A volume of an interior part of the first housing is smaller than a volume of an interior part of the second housing, and airtightness of the first housing is higher than airtightness of the second housing.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a light projecting device including a solid light source element that emits light.

  2. Description of the Related Art Conventionally, as a light projecting device, a light projecting device including a solid light source element (for example, LED) that emits light is known (for example, Patent Document 1). By the way, under the condition where the solid light source element communicates with the outside air, the light emitted from the light projecting device may not be desired light.

JP 2014-11118 A

  Then, a subject is providing the light projection apparatus which can suppress that a solid light source element communicates with external air.

  The light projecting device includes a solid light source element that emits light, an optical element that receives light emitted from the solid light source element and emits the light toward the outside of the apparatus, and a first light source element that houses the solid light source element. A first housing and a second housing that houses the optical element, wherein the volume inside the first housing is smaller than the volume inside the second housing, The airtightness of the second housing is higher than the airtightness of the second casing.

  Further, the light projecting device may be configured such that at least a part of the first housing is disposed inside the second housing.

  Further, the light projecting device includes a heat radiating portion that releases heat generated from the solid light source element to the outside of the first housing, and the heat radiating portion is disposed outside the second housing. It may be configured.

  In the light projecting device, the second housing may include an opening for ventilating between the inside and the outside, and the opening may be arranged to face the direction of gravity. .

  As described above, the light projecting device has an excellent effect that the solid light source element can be prevented from communicating with the outside air.

It is a whole figure of the light projection device concerning one embodiment, and is a figure showing the state where it is projecting in the slanting upper direction. It is a whole figure of the light projection device concerning the embodiment, and is a figure showing the state where light is projected right above. It is an internal view of the apparatus main body of the light projection apparatus which concerns on the same embodiment. It is an internal view of the 1st housing | casing of the light projection apparatus which concerns on the embodiment.

  Hereinafter, an embodiment of the light projecting device will be described with reference to FIGS. In each drawing, the dimensional ratio of the drawings does not necessarily match the actual dimensional ratio, and the dimensional ratio between the drawings does not necessarily match.

  As shown in FIG.1 and FIG.2, the light projector 1 which concerns on this embodiment supports the apparatus main body 2 which projects light from the light projection part 121 outside, the apparatus main body 2 so that rotation is possible, and the foundation of concrete And a support 3 fixed to an object to be fixed. For example, when the support 3 is fixed to an object to be fixed parallel to the horizontal direction, the light projecting device 1 has an obliquely upward direction (the angle with the vertical direction is less than 180 °, as shown in FIG. Direction) or as shown in FIG. 2, the light can be projected directly upward (vertical direction).

  As shown in FIGS. 3 and 4, the apparatus main body 2 includes a light source 4 that emits light and a fluorescent element 5 that converts a part of the incident light into fluorescence and outputs the fluorescence. In addition, the apparatus main body 2 has a first optical system 6 to which light output from the fluorescent element 5 is incident, and light emitted from the first optical system 6 is incident, and the light is converted into parallel light so as to project light. 1 and a second optical system 7 that emits light toward the outside.

  The apparatus main body 2 includes a third optical system 8 for causing light emitted from the light source 4 to enter the fluorescent element 5 via the first optical system 6. In addition, the apparatus main body 2 includes a light shielding body 9 disposed between the first optical system 6 and the second optical system 7 and a second optical system 7 in order to change the diameter of the projection light of the light projecting apparatus 1. And a driving unit 10 for driving the motor.

  The apparatus main body 2 houses a first housing 11 that houses a light source 4, a fluorescent element 5, a first optical system 6, and a third optical system 8, a second optical system 7, a light shield 9, and a drive unit 10. The second housing 12 is provided. In addition, the apparatus main body 2 includes a heat radiating portion 13 that releases heat generated from the light source 4 to the outside of the first housing 11 and a third housing 14 that houses the heat radiating portion 13.

  The light source 4 is a solid light source element 4. Specifically, the light source 4 is a light emitting element (for example, a semiconductor laser) that emits laser light. The light source 4 may be an LED. Further, a plurality of light sources 4 (six in FIGS. 3 and 4) are provided.

  In the present embodiment, the light source 4 emits blue light (for example, light having a wavelength of 400 to 470 nm). In addition, since the light source 4 is a light emitting element that emits laser light, the light projected from the light projecting device 1 is high output light. For example, the maximum luminous intensity of the projection light of the light projecting device 1 is 30,000,000 cd or more, preferably 35,000,000 cd or more, and more preferably 40,000,000 cd or more.

  The third optical system 8 includes a lens 81 into which the light emitted from the light source 4 is incident, and a mirror 82 that reflects the light emitted from the lens 81. The lens 81 may be a condensing lens that emits incident light as focused light, or may be a collimate lens that emits incident light as parallel light.

  The first optical system 6 includes a first lens 61, a dichroic mirror 62, and a second lens 63. In FIG. 4, the alternate long and short dash line indicates the light emitted from the light source 4 and incident on the fluorescent element 5 (the optical axis of the light emitted from each light source 4). 3 and 4, the two-dot chain line indicates the light output from the fluorescent element 5.

  The dichroic mirror 62 reflects the first polarization component (for example, S polarization component) of the light and transmits the second polarization component (for example, P polarization component) of the light. The light emitted from the light source 4 is linearly polarized laser light consisting only of the first polarization component. Accordingly, all the light emitted from the third optical system 8 is reflected by the dichroic mirror 62. Then, the light enters the fluorescent element 5 after passing through the first lens 61.

  Then, after being output from the fluorescent element 5, the light that has passed through the outer peripheral portion of the first lens 61 enters the second lens 63 without entering the dichroic mirror 62. Further, after being output from the fluorescent element 5, light that has passed through the central portion of the first lens 61 is incident on the dichroic mirror 62, and then only light that has passed through the dichroic mirror 62 is incident on the second lens 63. .

  By the way, since the light output from the fluorescent element 5 is diffused, it has not only the first polarization component but also the second polarization component. Therefore, out of the light incident on the dichroic mirror 62, the first polarization component light is reflected by the dichroic mirror 62, and the second polarization component light is transmitted through the dichroic mirror 62.

  The first lens 61 is a collimating lens that receives the divergent light emitted from the fluorescent element 5 and emits the divergent light as parallel light. The second lens 63 is emitted from the first lens 61. It is a focusing lens that receives parallel light and emits the parallel light as focused light. Accordingly, the first optical system 6 is a condensing optical system that emits incident light as focused light.

  The fluorescent element 5 has a phosphor that converts excitation light into fluorescence. In the present embodiment, the phosphor is made of a YAG-based crystal material, and blue light that is excitation light emitted from the light source 4 is converted into yellow-green fluorescence (for example, a peak at a wavelength of 525 to 575 nm). And has a broad visible spectrum in the range of 450 to 800 nm.

  The fluorescent element 5 converts part of the incident light into fluorescence with a phosphor. Therefore, the light output from the fluorescent element 5 includes fluorescence converted by the fluorescent element 5 and unconverted light (light as excitation light) that has not been converted by the fluorescent element 5. In the present embodiment, the light output from the fluorescent element 5 (that is, the projection light of the light projecting device 1) is a combination of yellow-green light that is fluorescence and blue light that is unconverted light, and white light. Become.

  The first housing 11 includes a light transmitting part 111 that transmits light, a light shielding part 112 that blocks light, and a heat transfer part 113 that conducts heat generated from the light source 4 and the fluorescent element 5 to the heat radiating part 13. I have. Then, the light emitted from the second lens 63 of the first optical system 6 is emitted from the first housing 11 by passing through the light transmitting part 111.

  The heat dissipating unit 13 includes a heat sink 131 having a plurality of fins and a fan 132 for circulating outside air. The heat radiating portion 13 is disposed outside the first housing 11 and the second housing 12. Thereby, the heat radiating unit 13 releases heat generated from the light source 4 and the fluorescent element 5 to the outside of the first housing 11 and the second housing 12 via the heat transfer unit 113.

  The light shielding body 9 includes a light shielding portion 91 that shields light and an optical path portion 92 through which light passes. In the present embodiment, the optical path portion 92 is an opening, but may be formed of a translucent material. The optical path 92 is a focal position of the first optical system 6 (specifically, the second lens 63) that is a condensing optical system (including not only a completely focal position but also a substantially focal position). Is arranged. Thereby, the light emitted from the first optical system 6 is incident on the second optical system 7 after passing through the optical path portion 92.

Further, the area of the optical path portion 92 is larger than the light output area of the fluorescent element 5. The outer edge of the “light output region of the fluorescent element 5” is, for example, e ⁻² (= 0.1353) with respect to the maximum light intensity of the light output from the fluorescent element 5 on the surface of the fluorescent element 5. Position.

  In addition, since the 1st optical system 6 is a condensing optical system, the light radiate | emitted from the 1st optical system 6 is converged to the position of a focus, and diverges after that. The second optical system 7 is arranged away from the first optical system 6 so as to be divergent light when the light emitted from the first optical system 6 is incident.

  The second optical system 7 includes a lens 71. The lens 71 receives divergent light that has diverged after passing through the optical path portion 92 of the light shield 9 and emits the divergent light as parallel light. For example, the lens 71 is a collimating lens or a Fresnel lens.

  The driving unit 10 moves the lens 71 of the second optical system 7 in the traveling direction of the light incident on the lens 71 (the optical axis direction of the incident light, and in the direction indicated by the broken arrow in FIG. Direction)). Thereby, since the area | region of the light which injects into the lens 71 changes, the diameter of the parallel light (namely, projection light of the light projection apparatus 1) radiate | emitted from the lens 71 changes.

  The second housing 12 includes a light projecting unit 121 that transmits light and a light shielding unit 122 that blocks light in order to project light toward the outside of the light projecting device 1. The second housing 12 includes an opening 123 for venting between the inside and the outside.

  The opening 123 is arranged to face the direction of gravity. Specifically, when the light projecting device 1 projects light directly upward (see FIG. 2), the opening 123 is disposed at a position that becomes the lower surface of the second housing 12. Thus, when the light projecting device 1 projects light obliquely upward (see FIG. 1), the opening 123 is arranged to face the obliquely downward direction, and the light projecting device 1 projects light directly upward. (See FIG. 2) At the time, the opening 123 is arranged so as to face directly downward.

  By the way, the volume inside the first housing 11 is smaller than the volume inside the second housing 12. A part of the first housing 11 is disposed inside the second housing 12. The airtightness of the first housing 11 is higher than the airtightness of the second housing 12.

  For example, the airtightness of the first housing 11 is preferably IP66 or higher in the protection class defined by IEC (International Electrotechnical Commission) 60529 and JIS (Japanese Industrial Standards) C0920. Further, the airtightness of the first housing 11 is more preferably IP67 or more, and further preferably IP68.

  In addition, the 1st characteristic number (1st number) of IP has shown the protection grade with respect to a human body and a solid substance. For example, the first characteristic number “6” of the IP indicates that it is a dust-proof type (dust does not enter the inside).

  In addition, the second characteristic number (second number) of IP indicates a protection class against water intrusion. For example, the IP second characteristic number “6” indicates that it is water resistant (not adversely affected by waves or strong direct jets of water from any direction), and “7” "8" indicates that it is in the form (does not adversely affect when immersed in water at the specified pressure and time), and "8" is in the form of water (continuously underwater according to the conditions specified by the manufacturer). (In principle, it is a completely sealed structure).

  Therefore, “IP66” indicates “dust-proof type” and “water-proof type”. Further, “IP67” indicates “dustproof type” and “waterproof type”, and “IP68” indicates “dustproof type” and “underwater type”.

  The configuration of the light projecting device 1 according to the present embodiment is as described above. Next, the operation of the light projecting device 1 according to the present embodiment will be described.

  For example, even when a structure that enhances airtightness is adopted for the housing, a smaller gap or the like is formed as the volume inside the housing increases. When outside air enters through such a gap, dust may enter the inside of the housing, or condensation may occur inside the housing when the humidity of the outside air that has entered is high.

  In addition, when dust adheres to the solid light source element 4 that is the light source 4, the dust may be baked, and when the condensed water enters the solid light source element 4, the solid light source element 4 may be damaged. In addition, when the condensed water enters the fluorescent element 5, light having a predetermined intensity may not be output from the fluorescent element 5.

  Therefore, among the configurations 4 to 9 that need to be accommodated in the cases 11 and 12, the light source 4, the fluorescent element 5, the first optical system 6, and the third optical system 8 are accommodated in the first case 11, The second optical system 7 and the light shield 9 are housed in the second housing 12. In addition, since the internal volume of the first housing 11 is smaller than the internal volume of the second housing 12, the airtightness of the first housing 11 can be further increased. . Therefore, it can suppress that each structure 4-6, 8 accommodated in the inside of the 1st housing | casing 11 communicates with external air.

  As described above, the light projecting device 1 according to this embodiment receives the solid light source element 4 that emits light and the light emitted from the solid light source element 4 and emits the light toward the outside of the apparatus 1. An optical element (in this embodiment, the second optical system 7 and the light shield 9), a first housing 11 that houses the solid light source element 4, and the optical element (in this embodiment, the second optical system 7 and A second housing 12 that houses a light shielding body 9), and the volume inside the first housing 11 is smaller than the volume inside the second housing 12, and the first housing 11 The airtightness of the second housing 12 is higher than the airtightness of the second housing 12.

  According to such a configuration, the first housing 11 accommodates the solid light source element 4, and the second housing 12 accommodates the optical elements (in the present embodiment, the second optical system 7 and the light shield 9). ing. The volume inside the first housing 11 is smaller than the volume inside the second housing 12, and the airtightness of the first housing 11 is more than the airtightness of the second housing 12. It is high. Thereby, since the airtightness of the 1st housing | casing 11 can be improved, it can suppress that the solid light source element 4 communicates with external air.

  Further, in the light projecting device 1 according to the present embodiment, at least a part of the first casing 11 is arranged inside the second casing 12.

  According to such a configuration, since at least a part of the first casing 11 is disposed inside the second casing 12, at least a part of the first casing 11 is covered with the second casing 12. As a result, the first housing 11 communicates with the outside air via the second housing 12. Therefore, since the airtightness of the 1st housing | casing 11 can further be improved, it can further suppress that the solid light source element 4 communicates with external air.

  Moreover, in the light projector 1 which concerns on this embodiment, it has the thermal radiation part 13 which discharge | releases the heat | fever which generate | occur | produces from the said solid light source element 4 to the exterior of the said 1st housing | casing 11, The said thermal radiation part 13 is said 2nd. It is the structure of being arranged outside the housing 12.

  According to such a configuration, the heat generated from the solid light source element 4 is released to the outside of the first housing 11 by the heat radiating unit 13. Since the heat radiating portion 13 is disposed outside the second housing 12, the heat generated from the solid light source element 4 is released to the outside of the second housing 12 by the heat radiating portion 13.

  Therefore, when the solid light source element 4 is switched from the output state to the non-output state, it is possible to prevent the temperature inside the second housing 12 from changing even if the heat radiation from the heat radiation unit 13 is lost. . As a result, for example, when the solid light source element 4 is in the output state, the solid light source element 4 is switched from the output state to the non-output state even if high humidity outside air has entered the second housing 12. When this occurs, it is possible to suppress the occurrence of condensation inside the second housing 12.

  Further, in the light projecting device 1 according to the present embodiment, the second housing 12 includes an opening 123 for ventilating between the inside and the outside, and the opening 123 faces the direction of gravity. It is the structure of being arrange | positioned.

  According to such a configuration, the opening 123 allows ventilation between the inside and the outside of the second housing 12, so that the inside of the second housing 12 can follow the environment outside the second housing 12. . Moreover, since the opening part 123 is arranged so as to face the direction of gravity, for example, rainwater falling in the direction of gravity can be prevented from entering the inside of the second housing 12 via the opening part 123. . For example, if condensation occurs inside the second housing 12, the condensed water can be discharged to the outside of the second housing 12 via the opening 123.

  The light projecting device is not limited to the configuration of the above-described embodiment, and is not limited to the above-described effects. Of course, the light projecting device can be variously modified without departing from the gist of the present invention. For example, it is needless to say that one or a plurality of configurations and methods according to various modifications described below may be arbitrarily selected and employed in the configurations and methods according to the above-described embodiments.

  In the light projecting device 1 according to the above embodiment, the first housing 11 is configured to house the light source 4, the fluorescent element 5, the first optical system 6, and the third optical system 8. However, the projector is not limited to such a configuration. For example, the first housing 11 may be configured to accommodate only the light source 4 and the fluorescent element 5, or may be configured to accommodate only the light source 4. In short, the 1st housing | casing 11 should just be the structure of accommodating the solid light source element 4 at least.

  Moreover, in the light projector 1 which concerns on the said embodiment, it is the structure that the optical element accommodated in the 2nd housing | casing 12 is the 2nd optical system 7 (lens 71) and the light-shielding body 9. FIG. However, the projector is not limited to such a configuration. For example, the optical element housed in the second housing 12 may be the second optical system 7 (lens 71) alone, the light shield 9 alone, or another element.

  Moreover, in the light projector 1 which concerns on the said embodiment, it is the structure that a part of 1st housing | casing 11 is arrange | positioned inside the 2nd housing | casing 12. FIG. However, the projector is not limited to such a configuration. For example, the first casing 11 may be entirely disposed inside the second casing 12. For example, the first casing 11 may be entirely outside the second casing 12. The structure of being arranged may be sufficient.

  Moreover, in the light projector 1 which concerns on the said embodiment, the thermal radiation part 13 is a structure provided with the heat sink 131 and the fan 132. FIG. However, the projector is not limited to such a configuration. For example, the heat dissipation unit 13 may include a Peltier element.

  Moreover, in the light projector 1, the structure that the 2nd housing | casing 12 is provided with the cover body which covers the opening part 123 may be sufficient. Such a cover body may be, for example, a filter through which dust and water cannot pass and air can pass through, and also a cover body through which not only dust and water but also air cannot pass. Good.

DESCRIPTION OF SYMBOLS 1 ... Projection apparatus, 2 ... Apparatus main body, 3 ... Support body, 4 ... Light source (solid light source element), 5 ... Fluorescence element, 6 ... 1st optical system, 7 ... 2nd optical system, 8 ... 3rd optical system , 9: Shading body, 10: Driving unit, 11: First housing, 12: Second housing, 13: Heat radiation unit, 14: Third housing, 61: First lens, 62: Dichroic mirror, 63 ... Second lens 71, lens 81, lens 82, mirror 91, light shielding part 92, light path part 111, light transmission part 112, light shielding part 113, heat transfer part 121, light projecting part 122 ... Light-shielding part, 123 ... Opening part, 131 ... Heat sink, 132 ... Fan

Claims (4)

A solid light source element that emits light;
An optical element that receives light emitted from the solid-state light source element and emits the light toward the outside of the device;
A first housing that houses the solid state light source element;
A second housing that houses the optical element,
The volume inside the first housing is smaller than the volume inside the second housing,
The light projecting device, wherein the airtightness of the first housing is higher than the airtightness of the second housing.   The light projecting device according to claim 1, wherein at least a part of the first housing is disposed inside the second housing. A heat dissipating part for releasing heat generated from the solid light source element to the outside of the first housing;
The light projecting device according to claim 2, wherein the heat dissipating unit is disposed outside the second housing. The second housing includes an opening for venting between the inside and the outside,
The light projecting device according to claim 1, wherein the opening is arranged to face the direction of gravity.

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