JP6988249B2 - Light source unit and lighting equipment - Google Patents

Description

The present invention relates to a light source unit and a luminaire.

A range of 30 ° above and below the center of the human line of sight is a glare zone, and it is said that a person feels glare if there is a high-brightness light source within this range. In order to prevent such unpleasant glare, for example, lighting that suppresses light with a light distribution angle in the range of 60 ° to 90 ° (range of 30 ° above the line of sight) is required, especially in a large space such as an office. Be done. Patent Document 1 discloses a lighting fixture capable of controlling such a light distribution angle.

JP-A-2015-162445

The luminaire of Patent Document 1 can only control glare in the lateral direction of the luminaire. Further, in a lighting fixture, it is conceivable to control the light distribution by using a louver. In this case, the size of the device can be large.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a light source unit and a lighting fixture capable of suppressing glare in the A direction and the B direction orthogonal to each other with a simple configuration. ..

The light source unit according to the present invention includes a light emitting unit, a first optical element that transmits light emitted by the light emitting unit, and a second optical element that adjusts the light distribution of the light transmitted through the first optical element. The first optical element and the second optical element each have a constant cross-sectional shape in a cross section along the A direction along the B direction orthogonal to the A direction, and the first optical element is along the B direction. It has a plurality of extending prism portions, the second optical element has a central region located in the center in a cross section along the A direction, and outer regions on both sides of the central region, and the central region of the second optical element is. , The outer region of the second optical element is a light source unit that diverges the light beam in the cross section along the A direction and focuses the light beam in the cross section along the A direction, and is incident on the inner surface of the central region in the cross section along the A direction. The angle between the optical axis and the second ray emitted from the outer surface of the second optical element through the central region is larger than the angle between the first ray and the optical axis of the light source unit. As such, the central region refracts the optics .
The lighting fixture according to the present invention includes the light source unit and a fixture main body to which the light source unit can be attached.

According to the present invention, glare in the A direction and the B direction orthogonal to each other can be suppressed with a simple configuration.

It is a perspective view of the luminaire according to Embodiment 1. FIG. It is an exploded perspective view of the luminaire according to Embodiment 1. FIG. It is sectional drawing of the light source unit by Embodiment 1. FIG. It is a light distribution map in Embodiment 1. It is sectional drawing of the light source unit by Embodiment 2. FIG. It is a light distribution map in Embodiment 2. It is sectional drawing of the light source unit by Embodiment 3. FIG.

Hereinafter, embodiments will be described with reference to the drawings. Common or corresponding elements in the drawings are designated by the same reference numerals to simplify or omit duplicate descriptions. The present disclosure may include any combination of configurable configurations among the configurations described in each of the following embodiments.

Embodiment 1.
FIG. 1 is a perspective view of the lighting fixture 1 according to the first embodiment. FIG. 2 is an exploded perspective view of the lighting fixture 1 according to the first embodiment. The lighting fixture 1 shown in these figures includes a fixture main body 101 and a light source unit 2 attached to the fixture main body 101. The instrument body 101 is attached to, for example, the ceiling. The instrument body 101 includes a lighting device. Further, the light source unit 2 may be provided with a lighting device. The lighting device lights the light source by supplying electric power to the light source included in the light source unit 2. As shown in FIG. 2, the light source unit 2 is removable from the instrument main body 101. In the illustrated example, the light source unit 2 is attached to the instrument body 101 by hooking the spring 91 provided on the instrument body 101 on the hooking portion 92 provided on the light source unit 2.

The light source unit 2 has an elongated shape. The "B direction" corresponds to the longitudinal direction of the light source unit 2. The "A direction" corresponds to the lateral direction of the light source unit 2. The A direction is a direction perpendicular to the B direction.

FIG. 3 is a cross-sectional view of the light source unit 2 according to the first embodiment. FIG. 3 is a cross-sectional view taken along the A direction. That is, FIG. 3 is a cross-sectional view cut along a plane perpendicular to the B direction. The light source unit 2 includes a base 10. The base 10 has an elongated shape with the B direction as the longitudinal direction. The base 10 supports the LED module 20. The LED module 20 is attached to the lower surface of the base 10. The LED module 20 corresponds to a "light emitting unit".

The LED module 20 includes a light emitting element 21 as a light source and a substrate 22. A light emitting element 21 is installed on the lower surface of the substrate 22. The number of light emitting elements 21 included in the LED module 20 may be one or more. The substrate 22 has a shape with the B direction as the longitudinal direction. By installing a plurality of light emitting elements 21 arranged along the B direction on the substrate 22, the luminous flux of the light source unit 2 can be increased. The light emitting element 21 in the present embodiment is an LED (Light Emitting Diode), but the light emitting element in the present invention is not limited to the LED, and for example, an organic EL (Electro-Luminescence) can be used as the light emitting element. ..

The optical axis AX of the light source unit 2 corresponds to the central axis of the light emitted by the light source unit 2. When the light source unit 2 is attached to the instrument main body 101, the optical axis AX may be parallel to the vertical line. The A direction and the B direction are perpendicular to the optical axis AX of the light source unit 2, respectively.

The light source unit 2 includes a diffuser plate 3, a first optical element 4, and a second optical element 5. The first optical element 4 transmits the light emitted by the LED module 20 by suppressing glare in the B direction. The second optical element 5 controls the A-direction light distribution of the light transmitted through the first optical element 4. The diffuser plate 3 is installed between the LED module 20 and the first optical element 4. The diffuser plate 3 corresponds to a light diffusion member that diffuses and transmits light. The diffusion plate 3 has a plate-like shape. The light emitted from the LED module 20 is diffused by the diffuser plate 3 and then incident on the first optical element 4. The upper surface of the diffuser plate 3 faces the LED module 20. The diffuser plate 3 is made of, for example, a milky white resin material.

The light source unit 2 includes a support member 6. The support member 6 supports the diffuser plate 3, the first optical element 4, and the second optical element 5. In the present embodiment, each of the diffuser plate 3, the first optical element 4, the second optical element 5, and the support member 6 has a symmetrical cross-sectional shape with the optical axis AX in the cross section along the A direction.

The support member 6 has an engaging portion 6a, a holding portion 6b, a first reflecting surface 6c, and a second reflecting surface 6d. The support member 6 is fixed to the base 10 by engaging the engaging portion 6a with the base 10. The holding portion 6b holds the edge portions of the diffuser plate 3 and the first optical element 4. A part of the light emitted from the LED module 20 is reflected by the first reflecting surface 6c and then incident on the diffuser plate 3. By providing the first reflecting surface 6c, more light emitted from the LED module 20 can be incident on the diffuser plate 3.

The light transmitted through the diffuser plate 3 and the first optical element 4 is incident on the inner surface of the second optical element 5. A part of the light incident on the inner surface of the second optical element 5 is reflected by the inner surface or the outer surface of the second optical element 5. The second reflecting surface 6d reflects the light reflected by the second optical element 5 so that the light is incident on the inner surface of the second optical element 5 again. By providing the second reflecting surface 6d, the amount of light radiated from the light source unit 2 to the outside can be increased.

Each of the first optical element 4 and the second optical element 5 has a constant cross-sectional shape in a cross section along the A direction along the B direction orthogonal to the A direction. The first optical element 4 and the second optical element 5 having such a shape may be manufactured by extrusion molding with the B direction as the extrusion direction. According to extrusion molding, the first optical element 4 and the second optical element 5 can be manufactured at low cost.

The first optical element 4 and the second optical element 5 are each made of a transparent resin material or a light milky white resin material. The first optical element 4 and the second optical element 5 may be made of, for example, polycarbonate.

The first optical element 4 has a plurality of prism portions 4a extending along the B direction. The plurality of prism portions 4a are arranged so as to be adjacent to each other along the A direction. As described above, in the first optical element 4, the cross-sectional shape in the cross section along the A direction is constant along the B direction. Therefore, by arranging the plurality of prism portions 4a on one surface of the first optical element 4, ridges and grooves extending along the B direction are formed. In the present embodiment, each prism portion 4a has a triangular shape, particularly an isosceles right triangle, in a cross section along the A direction. In the illustrated example, the apex of each prism portion 4a forms a corner, but instead, the apex may have a rounded shape.

The first optical element 4 has a concave-convex surface 4b and a smooth surface 4c. The uneven surface 4b is a surface on which unevenness is formed by a plurality of prism portions 4a. The smooth surface 4c is a surface opposite to the uneven surface 4b. The smooth surface 4c is a flat surface without unevenness. The uneven surface 4b of the first optical element 4 faces the lower surface of the diffuser plate 3. The light emitted from the LED module 20 passes through the diffuser plate 3 and then enters the uneven surface 4b of the first optical element 4. The light transmitted through the first optical element 4 is emitted from the smooth surface 4c. The light emitted from the smooth surface 4c is incident on the inner surface of the second optical element 5.

The second optical element 5 has a central region 5a and an outer region 5b. The central region 5a is located in the center in the cross section along the A direction. The outer region 5b is located outside the central region 5a in the cross section along the A direction. The outer region 5b is provided on both sides of the central region 5a in a cross section along the A direction. The central region 5a diverges the luminous flux in the cross section along the A direction. The light ray R1 in FIG. 3 is an example of a light ray incident on the central region 5a. The light ray R2 corresponds to a light ray that the light ray R1 passes through the central region 5a and is emitted from the outer surface of the second optical element 5. The angle between the light ray R2 and the optical axis AX is larger than the angle between the light ray R1 and the optical axis AX.

The outer region 5b of the second optical element 5 focuses the luminous flux in the cross section along the A direction. The light ray R3 in FIG. 3 is an example of a light ray incident on the outer region 5b. The light ray R4 corresponds to a light ray that the light ray R3 passes through the outer region 5b and is emitted from the outer surface of the second optical element 5. The angle between the light ray R4 and the optical axis AX is smaller than the angle between the light ray R3 and the optical axis AX.

The second optical element 5 has a fixed portion 5c. The second optical element 5 is fixed to the support member 6 by fixing the fixing portion 5c to the side surface of the support member 6.

The structure of the support member 6 is not limited to that shown in FIG. 3, and may be any structure as long as it can support the diffuser plate 3, the first optical element 4, and the second optical element 5. Further, the fixing method between each of the diffuser plate 3, the first optical element 4, and the second optical element 5 and the support member 6 is, for example, one of adhesive bonding, screwing, snap-fitting, and press-fitting. A method using at least one may be used. Further, at least one of the diffuser plate 3, the first optical element 4, and the second optical element 5 and the support member 6 may be integrally formed by two-color molding.

In the present embodiment, the following effects can be obtained by providing the diffusion plate 3. It is possible to suppress uneven illuminance on the irradiated surface. It is possible to prevent uneven brightness due to the grains of the individual light emitting elements 21 from occurring on the light emitting surface. It is possible to reduce the color unevenness of the irradiation surface in the first optical element 4 and the second optical element 5, which will be described later.

Next, the "light distribution angle" in the present specification will be described. First, the light distribution angle in the cross section along the A direction will be described. As shown in FIG. 3, the light distribution angle in the cross section along the A direction corresponds to the angle with the optical axis AX. In FIG. 3, for convenience, the light distribution angle in the range on the right side of the optical axis AX is “+”, and the light distribution angle in the range on the left side of the optical axis AX is “−”. The glare zone G is a range of light distribution angles where people can easily feel glare. The glare zone G has, for example, a light distribution angle in the range of 60 ° to 90 °. Similarly, the glare zone G is also in the range of the light distribution angle of −60 ° to −90 °.

Although not shown, the light distribution angle and the glare zone G are similarly defined in a cross section along the B direction, that is, a cross section cut in a plane perpendicular to the A direction. In order to prevent glare caused by the light source unit 2, it is important to reduce the luminous intensity of the light radiated from the light source unit 2 to the glare zone G in both the A direction and the B direction.

FIG. 4 is a light distribution map according to the first embodiment. In FIG. 4, the horizontal axis indicates the light distribution angle, and the vertical axis indicates the luminous intensity. In the following description, the light distribution in the cross section along the A direction may be referred to as "A direction light distribution", and the light distribution in the cross section along the B direction may be referred to as "B direction light distribution". In FIG. 4, the solid line graph shows the A-direction light distribution in the absence of the second optical element 5, that is, the A-direction light distribution of the light emitted from the first optical element 4. The dashed line graph shows the B-direction light distribution of the light emitted from the first optical element 4. The broken line graph shows the A-direction light distribution (hereinafter referred to as “final light distribution”) of the light emitted from the second optical element 5.

The role of the first optical element 4 is to suppress the light in the glare zone G with respect to the light distribution in the B direction by the prism portion 4a extending along the B direction. When the concave-convex surface 4b of the first optical element 4 is an incident surface as in the present embodiment, the light distribution characteristics as shown in FIG. 4 can be obtained. According to the first optical element 4, as shown by the graph of the alternate long and short dash line in FIG. 4, the luminous intensity of the light radiated to the glare zone G with respect to the light distribution in the B direction can be sufficiently lowered. Therefore, glare about the light distribution in the B direction can be reliably prevented or reduced.

As shown by the broken line frame 200 in FIG. 4, in the present embodiment, the first optical element 4 cannot suppress the light in the glare zone G for the A-direction light distribution. As described above, when the smooth surface 4c of the first optical element 4 serves as the exit surface, the first optical element 4 cannot suppress the light in the glare zone G. Further, regarding the light distribution in the A direction by the first optical element 4, as shown by the broken line frame 300 in FIG. 4, the amount of light in the central direction becomes larger than necessary.

The role of the second optical element 5 is to suppress the light in the glare zone G for the A-direction light distribution, and to distribute the A-direction light that has been deformed by the first optical element 4 to the same extent as the B-direction light distribution. It is to adjust so that it becomes. According to the second optical element 5, the A-direction light distribution shown by the solid line in FIG. 4 can be modified so as to be the final light distribution shown by the broken line.

The outer region 5b of the second optical element 5 can suppress the light in the glare zone G for the light distribution in the A direction. As shown in FIG. 3, the outer region 5b is arranged at a position where it receives the light radiated from the first optical element 4 to the glare zone G. As described above, the light ray R3 radiated from the first optical element 4 to the glare zone G is converted into the light ray R4 by the outer region 5b of the second optical element 5, and the angle with the optical axis AX becomes smaller. In this way, the light radiated from the first optical element 4 to the glare zone G is adjusted so that the light distribution angle is smaller than that of the glare zone G. Such an action is represented by an arrow α extending from the broken line frame 200 in FIG. The outer region 5b of the second optical element 5 has an effect of transferring the light of the portion surrounded by the broken line frame 200 in FIG. 4 to a region having a light distribution angle smaller than that of the glare zone G. As a result, it is possible to suppress the light in the glare zone G for the A-direction light distribution and to modify the shape of the A-direction light distribution.

The central region 5a of the second optical element 5 further adjusts the shape of the light distribution in the A direction by adjusting the light in the central direction surrounded by the broken line frame 300 in FIG. 4 so that the light distribution angle becomes large. It has the effect of modifying. That is, the central region 5a of the second optical element 5 has an effect of adjusting the light distribution in which the central luminous intensity is excessively increased. Such an action is represented by an arrow β extending from the broken line frame 300 in FIG. As described above, the light ray R1 radiated from the first optical element 4 to the central region 5a of the second optical element 5 is adjusted so that the light ray R2 has a larger light distribution angle. As a result, the luminous intensity in the central direction surrounded by the broken line frame 300 in FIG. 4 is reduced more than necessary, and the shape of the A-direction light distribution becomes a smooth shape like the final light distribution shown by the broken line. Can be modified as follows. The central region 5a of the second optical element 5 has an effect of increasing the light distribution angle of the light rays, but does not increase the light distribution angle of the light rays to the glare zone G.

In the present embodiment, the central region 5a of the second optical element 5 is formed as a refraction type Fresnel lens. The second optical element 5 may be a linear Fresnel lens.

The outer region 5b of the second optical element 5 is formed as a refraction type Fresnel lens. The outer region 5b of the second optical element 5 corresponds to a Fresnel lens of a convex lens.

The second optical element 5 has a concave-convex surface 5d and a smooth surface 5e. The uneven surface 5d is a surface on which the central region 5a and the outer region 5b are formed with irregularities by the Fresnel lens. The smooth surface 5e is a surface opposite to the uneven surface 5d. The smooth surface 5e is a flat surface without unevenness. In the present embodiment, the light from the first optical element 4 is incident on the uneven surface 5d of the second optical element 5. In the present embodiment, the outer surface of the second optical element 5 becomes a smooth surface 5e, so that the outer surface of the second optical element 5 can be easily cleaned.

According to this embodiment, the following effects can be obtained. By using the first optical element 4 and the second optical element 5 having a shape that can be easily manufactured by extrusion molding, glare in both the A direction and the B direction can be reliably prevented or reduced. In addition, the size can be reduced as compared with the configuration using a louver.

Embodiment 2.
Next, the second embodiment will be described with reference to FIGS. 5 and 6, but the differences from the above-described first embodiment will be mainly described, and the same or corresponding parts will be simplified or explained. Omit.

FIG. 5 is a cross-sectional view of the light source unit 7 according to the second embodiment. As shown in FIG. 5, the first optical element 4 included in the light source unit 7 of the present embodiment is arranged in the opposite direction to the light source unit 2 of the first embodiment. That is, in the first optical element 4 of the present embodiment, the concave-convex surface 4b serves as an exit surface and the smooth surface 4c serves as an incident surface.

The light source unit 7 of the present embodiment includes a second optical element 8 instead of the second optical element 5 of the first embodiment. The role of the second optical element 8 is the same as that of the second optical element 5 in the first embodiment. The second optical element 8 has a central region 8a and an outer region 8b. The central region 8a and the outer region 8b are each formed as a refraction type Fresnel lens. The central region 8a corresponds to a Fresnel lens of a concave lens. The outer region 8b corresponds to a Fresnel lens of a convex lens.

The second optical element 8 has a concave-convex surface 8d and a smooth surface 8e. The uneven surface 8d is a surface on which the central region 8a and the outer region 8b are formed with irregularities by the Fresnel lens. The smooth surface 8e is a surface opposite to the uneven surface 8d. The smooth surface 8e is a flat surface without unevenness. In the present embodiment, the light from the first optical element 4 is incident on the smooth surface 8e of the second optical element 8.

FIG. 6 is a light distribution map according to the second embodiment. In FIG. 6, the solid line graph shows the A-direction light distribution in the absence of the second optical element 8, that is, the A-direction light distribution of the light emitted from the first optical element 4. The dashed line graph shows the B-direction light distribution of the light emitted from the first optical element 4. The broken line graph shows the final light distribution, which is the A-direction light distribution of the light emitted from the second optical element 8.

When the concave-convex surface 4b of the first optical element 4 is the emission surface as in the present embodiment, the light distribution characteristics as shown in FIG. 6 can be obtained. Similar to the first embodiment, according to the first optical element 4, the luminous intensity of the light radiated to the glare zone G for the B-direction light distribution can be sufficiently lowered, and the glare for the B-direction light distribution can be reliably performed. Can be prevented or mitigated.

The light distribution in the A direction when the concave-convex surface 4b of the first optical element 4 is the emission surface is as follows. As for the A-direction light distribution, the light in the glare zone G is also suppressed. However, the light is suppressed beyond the glare zone G to a region where the light distribution angle is smaller, the central luminous intensity is high, and the light distribution tends to be focused. Further, the luminous intensity of the glare zone G in the A-direction light distribution is higher than the luminous intensity of the glare zone G in the B-direction light distribution. That is, the glare suppression level in the A-direction light distribution is inferior to the glare suppression level in the B-direction light distribution.

As indicated by the arrow α extending from the broken line frame 200 in FIG. 6, the outer region 8b of the second optical element 8 modifies the light in the glare zone G with respect to the light distribution in the A direction so that the light distribution angle becomes smaller. As a result, the glare suppression level in the A-direction light distribution can be improved, and the light in the glare zone G can be reliably suppressed in the A-direction light distribution. Further, by transferring the light in the portion surrounded by the broken line frame 200 in FIG. 6 to a region where the light distribution angle is smaller than that of the glare zone G, the light distribution in the A direction can be modified to have a good shape.

The central region 8a of the second optical element 8 further adjusts the shape of the A-direction light distribution by adjusting the light in the central direction surrounded by the broken line frame 300 in FIG. 6 so that the light distribution angle becomes large. It has the effect of modifying. That is, the central region 8a of the second optical element 8 has a function of adjusting the light distribution in which the central luminous intensity is excessively increased. Such an action is represented by an arrow β extending from the broken line frame 300 in FIG. As a result, the luminous intensity in the central direction surrounded by the broken line frame 300 in FIG. 6 is reduced more than necessary, and the shape of the A-direction light distribution becomes a smooth shape like the final light distribution shown by the broken line. Can be modified as follows. As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained. The second optical element 8 is disadvantageous in terms of cleaning as compared with the second optical element 5, but is advantageous in terms of efficiency and has an advantage that it is easy to design.

Embodiment 3.
Next, the third embodiment will be described with reference to FIG. 7, but the differences from the first embodiment described above will be mainly described, and the same or corresponding parts will be simplified or omitted.

FIG. 7 is a cross-sectional view of the light source unit 9 according to the third embodiment. The light source unit 9 of the present embodiment shown in FIG. 7 is the same as the light source unit 2 of the first embodiment except that the second optical element 11 is provided in place of the second optical element 5. The role of the second optical element 11 is the same as that of the second optical element 5 in the first embodiment. The second optical element 11 has a central region 11a and an outer region 11b. The central region 11a is formed as a refraction type Fresnel lens. The central region 11a corresponds to a Fresnel lens of a concave lens, and is the same as the central region 5a. The outer region 11b of the second optical element 11 is formed as a reflective Fresnel lens having a reflecting surface that totally reflects light. According to the third embodiment, the same effect as that of the first embodiment can be obtained.

Although the first to third embodiments have been described above, in the present invention, the following combinations can be further configured.
(1) Regarding the arrangement of the first optical element 4, there are cases where the concave-convex surface 4b of the first optical element 4 is an incident surface as in the first or third embodiment, and the first optical element as in the second embodiment. There are two types, one is the case where the uneven surface 4b of 4 is used as the exit surface.
(2) The Fresnel lens in the central region of the second optical element may be a refraction type Fresnel lens having a concave-convex surface as an incident surface as in the first or third embodiment, or a concave-convex surface as in the second embodiment. There are two types, one is a refraction type Fresnel lens as an emission surface.
(3) The Frenel lens in the outer region of the second optical element is a refraction type Frenel lens having a concave-convex surface as an incident surface as in the first embodiment, and an emission surface having an uneven surface as in the second embodiment. There are three types, one is a refraction type frennel lens and the other is a reflection type frennel lens as in the third embodiment.

Any combination of the above-mentioned two types (1), (2), and (3) is possible. That is, 2 × 2 × 3 = 12 combinations are possible.

When it is not necessary to make the second optical element thinner, at least one of the central region and the outer region of the second optical element should not be a Fresnel lens, but a simple convex lens, concave lens, or reflective lens in one stage. It may be configured. As another modification, when the purpose is only to suppress glare, the central region of the second optical element may be formed into a flat plate shape without lens control.

1 Lighting equipment, 2 Light source unit, 3 Diffusing plate, 4 First optical element, 4a prism part, 4b uneven surface, 4c smooth surface, 5 second optical element, 5a central area, 5b outer area, 5c fixed part, 5d uneven surface Surface, 5e smooth surface, 6 support member, 6a engaging part, 6b holding part, 6c first reflective surface, 6d second reflective surface, 7 light source unit, 8 second optical element, 8a central region, 8b outer region, 8d Concavo-convex surface, 8e smooth surface, 9 light source unit, 10 base, 11 second optical element, 11a central area, 11b outer area, 20 LED module, 21 light emitting element, 22 board, 101 instrument body

Claims (9)

Light emitting part and
The first optical element that transmits the light emitted by the light emitting unit and
A second optical element that adjusts the light distribution of light transmitted through the first optical element, and
Equipped with
The first optical element and the second optical element each have a constant cross-sectional shape in a cross section along the A direction along the B direction orthogonal to the A direction.
The first optical element has a plurality of prism portions extending along the B direction.
The second optical element has a central region located at the center in a cross section along the A direction and outer regions on both sides of the central region.
The central region of the second optical element radiates a luminous flux in a cross section along the A direction.
Wherein the outer region of the second optical element, the a light source unit Ru focuses the light beam in the cross section along the A direction,
In the cross section along the A direction, the first light ray passes through the central region and the second optical beam is more than the angle between the first light ray incident on the inner surface of the central region and the optical axis of the light source unit. A light source unit in which the central region refracts light so that the angle between the second light ray emitted from the outer surface of the element and the optical axis becomes large. The first optical element includes a concavo-convex surface having irregularities due to the plurality of prism portions and a smooth surface on the opposite side of the concavo-convex surface.
The light source unit according to claim 1, wherein the light emitted by the light emitting unit is incident on the uneven surface of the first optical element. The first optical element includes a concavo-convex surface having irregularities due to the plurality of prism portions and a smooth surface on the opposite side of the concavo-convex surface.
The light source unit according to claim 1, wherein the light emitted by the light emitting unit is incident on the smooth surface of the first optical element. At least one of the central region and the outer region of the second optical element has a Fresnel lens.
The second optical element includes a concavo-convex surface having irregularities due to the Fresnel lens and a smooth surface on the opposite side of the concavo-convex surface.
The light source unit according to any one of claims 1 to 3, wherein the light from the first optical element is incident on the uneven surface of the second optical element. At least one of the central region and the outer region of the second optical element has a Fresnel lens.
The second optical element includes a concavo-convex surface having irregularities due to the Fresnel lens and a smooth surface on the opposite side of the concavo-convex surface.
The light source unit according to any one of claims 1 to 3, wherein the light from the first optical element is incident on the smooth surface of the second optical element. The light source unit according to any one of claims 1 to 5, which has a shape having the B direction as the longitudinal direction. The light source unit according to any one of claims 1 to 6, wherein the light emitting unit includes a substrate having a shape with the B direction as the longitudinal direction and a plurality of light emitting elements installed on the substrate. The light source unit according to any one of claims 1 to 7, which is installed between the light emitting unit and the first optical element and includes a light diffusing member that diffuses and transmits light. The light source unit according to any one of claims 1 to 8.
The fixture body to which the light source unit can be attached and
Lighting equipment equipped with.

Images