JP2012123984A - Lighting system - Google Patents

Abstract

The present invention makes it possible to irradiate light with high efficiency within a necessary range without greatly changing the central luminous intensity and without causing unevenness in the color of the irradiation light on the irradiation surface.
An illumination device 1 according to the present embodiment covers a LED element 2 and a light emitting part of the LED element 2, condenses light emitted from the light emitting part 2b at a narrow angle, and emits the light to the outside. Provided on any one of the optical member 3, the surface of the concentrating translucent member 3, and the surface of the translucent member 5 disposed on the exit side of the concentrating translucent member 3, and the optical axis On a plane perpendicular to O, the light is divided into a plurality of sectors from the optical axis O toward the radial direction, and each of the divided ranges 4a to 4h has a radius r of 100 to 800 μm and from the plane 3A. And an optical path conversion unit 4 configured by arranging a plurality of convex forming portions 40 in a radial direction in a hemispherical shape having a protruding dimension h of 1 / 30r to 1 / 3r. is doing.
[Selection] Figure 1

Description

  Embodiments described herein relate generally to an illumination device that collects radiated light from an LED (Light Emitting Diode) and emits the light to the outside.

  2. Description of the Related Art In recent years, an illumination device that uses an LED as a light source, collects emitted light from the LED, and irradiates the illumination light to the outside, and illuminates irradiation light that brightens a predetermined area of an irradiation surface that is irradiated with irradiation light. It has been commercialized. Since such an illuminating device uses an LED, it can realize a long life and power saving as compared with a conventionally used spotlight such as a halogen spotlight.

  In such an illuminating device, when trying to obtain a light source having a high central luminous intensity, a translucent member that condenses light from the LED on the front surface of the LED, which is a light emitting element, and condenses it at a narrow angle. It is effective to arrange Furthermore, a light source with good light collection can be obtained by configuring the surface of the LED on the irradiation light side in a lens shape and optically controlling the emitted light.

  However, as described above, the illuminating device has a configuration in which the translucent member is disposed on the front surface of the LED, and the irradiation light side surface of the LED is configured in a lens shape to optically control the emitted light. Then, because the light emitted from the LED is well collected, the shape of the light emitting part of the LED is reflected, the irradiation shape of the irradiation light itself becomes irregular, and color unevenness occurs in the irradiation range. Inconvenience may occur.

  Therefore, in the conventional illumination device, in order to prevent the occurrence of color unevenness by controlling the spread angle of the emitted light, that is, the diffusion angle defined by the 1/2 beam angle of the central luminous intensity, There is a configuration in which the surface of the light-transmitting member is configured to have a shape that diffuses and emits incident light, or a flat plate-shaped diffusion member is provided on the front surface of the light-condensing translucent member.

JP 2009-266523 A

  However, for example, by providing a diffusing member on the exit surface of the lens unit, if the light emitted from the LED is simply diffused and emitted, the central luminous intensity decreases, and the desired amount of light cannot be obtained. is there.

  Therefore, the present embodiment has been made in view of such a problem, and the light that has been collected with high efficiency is obtained without greatly changing the central luminous intensity, without unevenness in the color of the irradiation light and unevenness in the amount of light. It aims at providing the illuminating device which can irradiate within a required range.

  An illumination device according to the present embodiment includes: an LED element having a light emitting unit; and a light-transmitting light that covers the light emitting unit of the LED element, collects radiated light from the light emitting unit at a narrow angle, and emits the light to the outside. An optical axis of the light emitting part, provided on one of a surface of the light transmissive member and a surface of the light transmissive member disposed on an emission side of the light transmissive member Is divided into a plurality of sectors in a fan shape from the optical axis toward the radial direction, and for each of the divided ranges, a radius r is 100 to 800 μm, and a protrusion dimension h from the plane is An optical path conversion unit configured by arranging a plurality of convex forming portions formed in a hemispherical shape that is 1 / 30r to 1 / 3r or convex or concave forming portions formed in a concave shape; It is characterized by comprising.

  According to the illuminating device according to the present embodiment, it is possible to irradiate light with high efficiency within a necessary range without greatly changing the central luminous intensity, without causing unevenness in the color unevenness of the irradiation light on the irradiation surface. It becomes possible.

The perspective view which shows the external appearance structure of the illuminating device which concerns on the 1st Embodiment of this invention. Sectional drawing of the illuminating device of FIG. The top view which shows the structure of the optical path change part provided in the surface of the condensing translucent member of FIG. AA line sectional view of Drawing 3. Sectional drawing of the illuminating device which concerns on a 1st modification. The figure which shows the state of irradiation light when the irradiation surface by the illuminating device of 1st Embodiment irradiates an irradiation surface. The side view which shows the structure of the illuminating device which concerns on a 2nd modification. The side view which shows the structure of the illuminating device which concerns on a 3rd modification. The figure which shows the state of irradiation light when the irradiation surface by the illuminating device which concerns on a 2nd or 3rd modification illuminates an irradiation surface. The top view which shows the structure of the 2nd optical path change part provided in the surface of the condensing translucent member of the illuminating device which concerns on the 2nd Embodiment of this invention, or a translucent member. BB sectional drawing of FIG. The figure which shows the state of irradiated light when the irradiated light by the illuminating device which concerns on 2nd Embodiment is illuminated on an irradiation surface. The figure which shows the state of irradiation light when the irradiation light by the conventional illuminating device is illuminated on the irradiation surface.

  An illumination device according to an embodiment of the present invention includes: an LED element having a light emitting unit; and a light collecting unit that covers the light emitting unit of the LED element, collects emitted light from the light emitting unit at a narrow angle, and emits the light to the outside. A light transmissive member; provided on any one of a surface of the light transmissive member and a surface of the light transmissive member disposed on an emission side of the light transmissive member; Are divided into a plurality of sectors in a fan shape from the optical axis in the radial direction on the plane perpendicular to the optical axis, and for each of the divided ranges, the radius r is 100 to 800 μm and protrudes from the plane. An optical path formed by arranging a plurality of convex forming portions or concave forming portions formed in a hemispherical shape having a dimension h of 1 / 30r to 1 / 3r in the radial direction. And a conversion unit.

In the embodiments of the present invention and the following claims, the definitions and technical meanings of terms are as follows unless otherwise specified.
The LED element has a light emitting part such as a glass lens disposed on the irradiation side of the surface-mounted LED, for example, but the light emitting part is not limited to the glass lens, and other You may comprise using the lens member of.

The condensing light-transmitting member covers the light-emitting portion of the LED element, and radiates light from the light-emitting portion, for example, by reflecting the light from the side surface portion and the like, and collects the light at a narrow angle and emits it to the outside. The portion covering the light emitting part is configured to have translucency. As the member having translucency, for example, a resin member having translucency and diffusibility is used, and as this resin member, for example, a thermoplastic plastic such as polycarbonate is used.
Moreover, the shape of the light-condensing translucent member has a concave portion that is concave and cylindrical so as to cover the light emitting portion of the LED element, and the surface of the concave portion facing the light emitting portion is in the light emitting portion side direction. It is desirable that the exit surface for emitting light to the outside be formed in a flat shape. In addition, a gap is formed between the concave portion and the light emitting portion, but the present invention is not limited to this configuration.

  In addition, as for the shape other than the flat emission surface of the light-condensing translucent member, as long as the light emitted from the emission surface can be emitted as irradiation light that brightens one point on the irradiation surface, Any shape may be used.

  The convex forming part or the concave forming part of the optical path changing part is divided into a plurality of sectors in a fan shape from the optical axis toward the radial direction on a plane perpendicular to the optical axis of the light emitting part. Each is configured as a part of a semi-cylindrical shape having a radius r of 100 to 800 μm and a protruding dimension h from the plane of 1 / 30r to 1 / 3r. For example, the radius r is 500 μm, the protruding dimension is 50 μm, and the pitch Is 500 μm.

  In addition, the number of ranges to be divided by the optical path conversion unit may be divided, for example, within the range of any one of 4 to 16, but is not limited to this, and may be appropriately set as necessary. good.

  In addition, the optical path conversion unit is provided on either the surface of the concentrating translucent member or the surface of the translucent member disposed on the emission side of the concentrating translucent member. When it is provided on the surface of the light transmissive member, it may be provided on either the front or back side of the light transmissive member.

(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 6 relate to the illumination device of the first embodiment, FIG. 1 is a perspective view showing an external configuration of the illumination device according to the first embodiment, and FIG. 2 is a cross-sectional view of the illumination device of FIG. FIG. 3 is a plan view showing a configuration of an optical path changing part provided on the surface of the condensing light-transmitting member or the light-transmitting member in FIG. 1, and FIG. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a cross-sectional view of the lighting device according to the first modification, and FIG. 6 is a diagram illustrating a state of pseudo irradiation light when irradiation light from the lighting device according to the first embodiment is illuminated on the irradiation surface. It is.

  As shown in FIGS. 1 and 2, the illuminating device 1 according to the first embodiment includes an LED element 2, a condensing translucent member 3, and an optical path conversion unit 4.

  The LED element 2 includes a rectangular parallelepiped element body 2a having a light emitting surface on which an LED is surface-mounted, and a glass lens 2b which is a light emitting portion provided so as to protrude from the light emitting surface side of the element body 2a. Composed.

  The glass lens 2b is, for example, a lens body formed in a hemispherical shape having an outer diameter of 5 mm, and diffuses and emits the light emitted from the element body 2a toward the condensing translucent member 3.

The condensing translucent member 3 covers the glass lens 2b of the LED element 2 and reflects the radiated light from the glass lens 2b by, for example, the side surface portion 3D, thereby condensing it at a narrow angle and emitting it to the outside. This condensing translucent member 3 is comprised using the member which has translucency. As the member having translucency, for example, a resin member having translucency and diffusibility is used, and as this resin member, for example, a thermoplastic plastic such as polycarbonate is used.
Moreover, the condensing translucent member 3 has the recessed part 3B in which the LED element side part was formed in concave shape so that the glass lens 2b of the LED element 2 might be covered. The recess 3B is formed in a cylindrical shape, for example. The surface 3E of the recess 3B facing the glass lens 2b is formed in a substantially hemispherical shape that is curved so as to protrude in the glass lens 2b side direction. A space 3 </ b> C, which is a gap, is formed between the concave portion 3 </ b> B of the light-transmissive member 3 and the glass lens 2 b.

  Moreover, the condensing translucent member 3 has a plane 3A orthogonal to the optical axis O of the LED element 2, and by providing the optical path conversion unit 4 on the plane 3A, the plane 3A is collected by the condensed glass. An emission surface 3F that emits light from the lens 2b to the outside is configured.

  Moreover, the condensing translucent member 3 has a circular cross-sectional shape orthogonal to the optical axis O that is the central axis, and the diameter of the cross-section gradually increases from the mounting surface of the LED element 2 toward the plane 3A. And the shape which has the part of the same diameter from the middle.

  In addition, the shape of the condensing translucent member 3 may be a shape that allows the light emitted from the emission surface 3F to be emitted as irradiation light that brightens a predetermined region of the irradiation surface, that is, a spot light region. Any shape may be used.

  In the present embodiment, the optical path conversion unit 4 is provided on the surface (the plane 3 </ b> A) of the light concentrating and translucent member 3. As shown in FIGS. 1 to 4, the optical path changing unit 4 is formed from a center R through which the optical axis O passes on a plane 3 </ b> A cut in a direction orthogonal to the optical axis O of the glass lens 2 b of the LED element 2. It is configured to have eight fan-shaped ranges 4a to 4h obtained by dividing the region of the plane 3A into eight in the radial direction.

  As shown in FIGS. 3 and 4, the optical path conversion unit 4 has a plurality of convex-shaped portions 40 each including a plurality of elongated convex lenses extending in a straight line in each range on the exit surface 3 </ b> F. Each convex-shaped part 40 has a semicircular shape in a cross section orthogonal to the plane 3A and orthogonal to the direction in which each convex lens extends linearly. In each range, the convex portions 40 of the plurality of elongated convex lenses are provided so as to be parallel to each other when viewed from the direction facing the emission surface 3F. That is, for each divided range of the optical path conversion unit 4, a convex shape that is a part of a semi-cylindrical shape having a radius r of 100 to 800 μm and a projecting dimension h of 1/30 r to 1/3 r and is formed in a convex shape. A plurality of forming portions 40 are arranged in the radial direction.

  Specifically, for example, for each of the eight divided ranges 4a to 4h, the radius r is 100 to 800 μm, and the projecting dimension h from the plane 3A is 1 / 30r to 1 / 3r, which is hemispherical and convex. A plurality of convex forming portions 40 formed in a shape are provided in parallel with each other along the direction toward the radial direction. In addition, the convex shape part 40 of FIG. 4 may be a concave formation part (not shown) formed in a concave shape.

  In the present embodiment, for example, the convex forming part 40 of the optical path changing unit 4 is configured to have a radius r = 500 μm, a protruding dimension h = 50 μm from the exit surface 3A, and a pitch P = 500 μm. A plurality of the shape forming portions 40 are arranged in parallel in the radial direction from the center R for each of the eight ranges 4a to 4b.

  Note that the optical path conversion unit 4 having the above-described configuration is not provided on the surface of the concentrating light transmissive member 3 and is disposed on the exit side of the concentrating light transmissive member 3 as shown in the first modification of FIG. You may comprise by providing in the surface of the provided flat-shaped translucent member 5. FIG. In this case, the surface opposite to the surface of the light transmissive member 5 on the side of the light transmissive member 3 is the emission surface 5F.

  Next, the operation of the lighting device of the present embodiment will be described with reference to FIGS. 6A is an explanatory diagram for explaining a diffusion state of irradiation light irradiated on the irradiation surface from the lighting device, and FIG. 6B is an irradiation when irradiation light from the lighting device is illuminated on the irradiation surface. It is a top view for demonstrating the state of light.

  In the illuminating device 1 of the present embodiment, the plurality of convex forming portions 40 of the optical path changing unit 4 are glass lenses in a direction orthogonal to the extending direction of the fine convex lens elongated in a straight line in FIG. The optical path of the incident light is changed so as to diffuse the angle of the irradiation light from 2b.

  That is, as shown in FIG. 4, the convex forming portion 40 receives incident light C, which is parallel light parallel to the optical axis O, from the glass lens 2 b through the light-transmissive member 3. Irradiation light including the optical path C1 exiting on a straight line and the optical paths C2 and C3 exiting at a predetermined diffusion angle is emitted.

  For example, as shown in FIG. 13, the conventional lighting device irradiates irradiation light having an irradiation range 101 that brightens one point on the irradiation surface 100 with respect to the irradiation surface 100. The light emitting portion shape 103 is reflected, the irradiation shape of the irradiation light itself becomes irregular, and color unevenness occurs in the irradiation range 101. In FIG. 13, an irradiation range 102 indicates a range when light from the LED element is irradiated without being diffused.

  Therefore, optical processing such as diffusing and blurring the light of the shape of the light emitting portion of the LED element 2 reflected in the illumination light as shown in FIG. It is.

  Accordingly, when the illumination device 1 having such optical characteristics actually irradiates the irradiation surface with the irradiation light, as shown in FIG. 6B, a predetermined region of the irradiation surface 10 with respect to the irradiation surface 10. Irradiation light having an irradiation range 11 that brightens the spot area is irradiated. In addition, in FIG.6 (b), the irradiation range 12 shows the range when the light from the LED element 2 is irradiated without being diffused.

  In this case, in the conventional illumination device, the light emitting part shape portion of the LED element 2 is reflected in the irradiation range 13 between the irradiation range 12 and the irradiation range 11.

  However, in this embodiment, the irradiation range 13 between the irradiation range 12 and the irradiation range 11 diffuses the light of the light emitting portion shape portion of the LED element 2 reflected in the illumination light by the optical path conversion unit 4. Since the optical processing is blurred, the light emitting portion shape portion is not reflected and irradiation light with no unevenness in the amount of light is irradiated. Of course, the shape of the illumination light does not become distorted and becomes an ideal substantially circular shape.

  In this case, even if the irradiation apparatus 1 of this embodiment performs an optical process by the optical path changing unit 4, as shown in FIG. The two beam angles, that is, the diffusion angle θ and the central luminous intensity are not significantly changed.

  Therefore, according to the first embodiment, the ideal substantially circular illumination light 12 as shown in FIG. 6B can be obtained without largely changing the diffusion angle θ and the central luminous intensity. The illumination device 1 that can irradiate the light within a necessary range (within the irradiation range 11) without any unevenness in the color unevenness of the irradiation light 12 with respect to the surface 10 can be realized.

  In the present embodiment, as in the second modified example shown in FIG. 7, a plurality of illumination devices provided with the optical path conversion unit 4 are provided, and the plurality of illumination devices 1a to 1d are provided as appropriate to perform illumination. The apparatus 1B may be configured. FIG. 7 shows only four illumination devices in a case where a plurality of illumination devices are arranged in a two-dimensional manner. In FIG. 7, each lighting device is provided with a light path conversion unit 4 in the light-transmissive member 3 as shown in FIG. 2.

  Further, as in the third modification shown in FIG. 8, a plurality of illumination devices configured without providing the optical path conversion unit 4 are provided, and a plurality of illumination devices 1a1 are provided on the emission surface side of the plurality of illumination devices 1a1 to 1a4. The illuminating device 1C is arranged such that the light transmissive member 5 formed in an area covering ˜1a4 is disposed, and the light path changing portion 4 is provided on the surface of the light transmissive member 5 so as to form the emission surface 5F. It may be configured. However, in this case, the plurality of illumination devices 1a1 to 1a4 need to be positioned in accordance with the position of the optical path conversion unit 4 of the translucent member 5.

  FIG. 9 is a diagram for explaining the state of the irradiation light when the irradiation surface is irradiated with the irradiation light from the illumination device according to the second or third modification. The irradiation light shown in FIG. 9 is obtained when the four lighting devices shown in FIG. 7 or FIG. 8 are arranged in a 2 × 2 matrix.

  As shown in FIG. 9, even when the lighting device is configured, the irradiation light 12A to irradiate the light that is condensed with high efficiency without any unevenness in color and light quantity within the required range (in the irradiation ranges 11A to 11D). 12D is obtained, and, of course, the glass lens-shaped portion is not reflected in each of the irradiation ranges 13A to 13D.

  The four illumination lights 12A to 12D and the four illumination ranges 11A to 11D are illumination lights that partially irradiate the illumination light and illuminate the illumination surface 10 in a concentrated manner.

  Therefore, also in the second and third modified examples, the same effects as those of the first embodiment can be obtained even when configured using a plurality of illumination devices.

  In addition, in the said 1st Embodiment and the 1st-3rd modification, the said optical path conversion part 4 is the ratio with respect to the total surface area of the surface of the condensing translucent member 3, or the surface of the translucent member 5 May be provided to be 2/3 or more. In this case, the same effect as described above can be obtained.

(Second Embodiment)
FIGS. 10 to 12 relate to the illumination device according to the second embodiment, and FIG. 10 shows the first configuration of the light-collecting translucent member or the translucent member of the illumination device according to the second embodiment. FIG. 11 is a partial cross-sectional view taken along the line BB in FIG. 10, and FIG. 12 illustrates irradiation light from the illumination device according to the second embodiment on the irradiation surface. It is a figure for demonstrating the state of the irradiation light when illuminated.
10 to 12, the same components as those of the illumination device of the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different portions are described.

  As shown in FIGS. 10 and 11, the illumination device of the second embodiment has an optical axis O of the glass lens 2 b of the light emitting unit in addition to the optical path changing unit 4 provided in the first embodiment. A plurality of convex forming portions 40A made of fine convex lenses that are formed in an elongated annular shape are provided on a plane that is cut in a direction orthogonal to each other. Each convex forming portion 40A has a semicircular shape in a cross section orthogonal to the plane 3A and also orthogonal to the annular direction.

  The convex forming portion 40A is a part of an annular semi-cylindrical shape having a radius r of 100 to 800 μm and a protruding dimension h from the plane of 1 / 30r to 1 / 3r, and a plurality of annular shapes having different diameters. Is a convex forming portion formed in a convex shape, and is an optical path changing portion provided concentrically from the vicinity of the optical axis O. Note that the convex shape portion 40A in FIG. 11 may be a concave formation portion (not shown) formed in a concave shape.

  For example, the second optical path changing unit 4A is provided on the surface of the light transmissive member 5 separately provided on the light emission surface side of the light concentrating light transmissive member 3 in FIG. 2, or the light transmissive light shown in FIG. Of the translucent member 5 provided on the reverse side of the translucent member 5 provided with the optical path changing section 4 or disposed on the exit surface side of the plurality of concentrating translucent members 3 shown in FIG. It is provided on the front surface or on the back surface on the opposite side where the optical path changing portion 4 of the translucent member 5 shown in FIG. 8 is provided. In addition, in this embodiment, it is not limited to the combination at the time of providing such 2nd optical path conversion part 4A and the said optical path conversion part 4. FIG.

  In the present embodiment, the convex forming portion 40A of the optical path changing portion 4A is configured to have, for example, a radius r = 500 μm, a protruding dimension h = 50 μm from the exit surface 3A, and a pitch P = 500 μm, and this diameter A plurality of different annular convex forming portions 40A are arranged concentrically from the vicinity of the center R passing through the optical axis O.

  Next, the operation of the lighting apparatus according to the present embodiment will be described with reference to FIGS. 12A is an explanatory diagram for explaining a diffusion state of irradiation light irradiated on the irradiation surface from the lighting device, and FIG. 12B is an irradiation when irradiation light from the lighting device is illuminated on the irradiation surface. It is a top view for demonstrating the state of light.

  In the illumination device 1 of the present embodiment, the plurality of convex forming portions 40 of the optical path changing portion 4A diffuses the angle of the irradiation light from the glass lens 2b in the direction of the line connecting the center R and the outer periphery in FIG. In this way, the optical path of the incident light is changed.

  That is, as shown in FIG. 11, when the incident light C, which is parallel light from the glass lens 2b, is incident through the condensing light-transmitting member 3, the convex forming portion 40A emits straight as it is. Irradiation light including the optical path C1 and the optical paths C2 and C3 emitted at a predetermined diffusion angle is emitted.

  By combining the optical characteristics of the optical path conversion unit 4A diffusing and the optical characteristics of the optical path conversion unit 4 in the first embodiment, a 1/2 beam angle is larger than that in the first embodiment. The illumination light can be controlled as follows.

  That is, the irradiation apparatus 1 of the present embodiment is ½ of the central luminous intensity as compared with the first embodiment, as shown in FIG. 12A, by the optical processing performed by the optical path conversion units 4 and 4A. The beam angle, that is, the diffusion angle θ1 is slightly increased. Specifically, the diffusion angle θ1 can be widened from 18 degrees to 25 degrees.

  Therefore, when the illumination device 1 having such optical characteristics actually irradiates the irradiation surface with irradiation light, as shown in FIG. 12B, the irradiation surface 10 is substantially the same as in the first embodiment. Irradiation light having an irradiation range 11 that brightens one point of the irradiation surface 10 is irradiated, but by providing a second optical path conversion unit 4A, the irradiation light 12 of the first embodiment is provided. Irradiation light having a larger outer diameter can be irradiated than (see FIG. 6B).

  Of course, there is no unevenness in the color of the irradiation light on the irradiation surface 10, and it is possible to irradiate the condensed light with high efficiency within the required range (in the irradiation range 11 a).

  Therefore, according to the second embodiment, by further providing the second optical path conversion unit 4A, it is possible to irradiate irradiation light having a large outer diameter, and there is no unevenness in the amount of light and unevenness in the color of the irradiation light. It is possible to realize an illuminating device that can irradiate highly concentrated light within a necessary range (inside the irradiation range 11a).

  The present invention is not limited to the above-described embodiments and modifications, and various changes and modifications can be made without departing from the scope of the present invention.

1 ... lighting device,
2 ... LED element,
2a element body,
2b ... Glass lens,
3 ... Condensed translucent member,
3A: emitting surface,
3B ... recess,
3C ... space part,
3D ... side part,
4 ... Optical path changing unit,
4A ... second optical path conversion unit,
5 ... translucent member,
40, 40A ... convex forming part.

Claims (5)

An LED element having a light emitting part;
A condensing translucent member that covers the light emitting portion of the LED element, condenses the emitted light from the light emitting portion at a narrow angle, and emits the light to the outside;
Provided on any one of the surface of the concentrating translucent member and the surface of the translucent member disposed on the exit side of the concentrating translucent member, and orthogonal to the optical axis of the light emitting unit On the plane that is in the direction to be cut, the fan is divided into a plurality of sectors from the optical axis toward the radial direction, and for each of the divided ranges, the radius r is 100 to 800 μm, and the projecting dimension h from the plane is 1/30 r to A hemispherical shape that is 1 / 3r, and an optical path conversion unit that is formed by arranging a plurality of convex forming portions or convex forming portions formed in a concave shape in the radial direction;
An illumination device comprising:   The said optical path conversion part was provided so that the ratio with respect to the total surface area of the surface of the said condensing translucent member or the surface of the said translucent member might become 2/3 or more. Lighting equipment.   The said LED element is provided with two or more, The said condensing translucent member is provided in each LED element, The said optical path conversion part is provided in the said translucent member, The Claim 1 or Claim 2 characterized by the above-mentioned. The lighting device described in 1.   The illuminating device according to any one of claims 1 to 3, wherein the plurality of ranges divided by the optical path changing unit are ranges divided into any one of 4 to 16.   A hemispherical shape having a radius r of 100 to 800 μm and a projecting dimension h from the plane of 1 / 30r to 1 / 3r on a plane perpendicular to the optical axis of the light emitting portion, and a diameter A second optical path changing portion provided concentrically from the vicinity of the optical axis, with a convex forming portion formed into a plurality of different annular convex shapes or a concave forming portion formed into a concave shape. The lighting device according to any one of claims 1 to 4, wherein the lighting device is characterized.

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