JP2018006250A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel luminaire capable of illuminating an irradiation region according to a shape of a surface to be illuminated of a rectangular shape with a moderate size, such as a poster, a signboard, a painting or a board.SOLUTION: A luminaire is configured to illuminate a planar surface to be illuminated of an object 30 to be illuminated, and includes at least a light source part 10 containing one or more solid light source, and an optical system 20 having positive power. The luminaire is configured to image light flux from the light source 10 on the surface to be illuminated or the vicinity thereof by the optical system 20, according to the shape and size of the surface to be illuminated, thereby illuminating the surface to be illuminated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lighting device.

There are various illumination methods for illuminating things depending on the object to be illuminated. When the object to be illuminated is a painting, poster, signboard, board, or the like, the illuminated object has a flat illuminated surface.
As an illumination device for illuminating such a planar illuminated surface, light from a normal lamp is irradiated and illuminated from a position away from the illuminated surface, or light from a solid light source such as an LED. What illuminates obliquely from the lateral direction of the surface to be illuminated is widely known.

In these conventional illumination methods, the illumination area is close to a circle or ellipse.
When the object to be illuminated is a poster, a signboard, a painting, or the like, the illuminated surface is planar and generally has a rectangular shape. When illuminating such a rectangular illuminated surface with an illuminating device having a “circular or elliptical illumination region”, if the rectangular illuminated surface is intended to be contained within the “circular or elliptical illumination region” The amount of illumination light that protrudes from the surface to be illuminated is useless, and if the illumination area that projects from the surface to be illuminated is reduced, the illuminance on the surface to be illuminated tends to be uneven.
For example, an illumination method using a plurality of light sources in order to uniformly illuminate a large surface to be illuminated such as a large signboard is known (Patent Document 1).

  This invention makes it a subject to implement | achieve the novel illuminating device which can illuminate the illumination area according to the shape of to-be-illuminated surfaces, such as a rectangular shape with a certain size, such as a poster, a signboard, a picture, and a board.

  An illumination device according to the present invention is an illumination device that illuminates a planar illumination surface of an object to be illuminated, and includes at least a light source unit including one or more solid light sources and an optical system having a positive power. The light beam from the light source unit is imaged on or near the illuminated surface by the optical system according to the shape and size of the illuminated surface to illuminate the illuminated surface.

  According to the present invention, it is possible to realize a novel illumination device that can illuminate an illumination area corresponding to the shape of a surface to be illuminated, such as a rectangular shape having a certain size, such as a poster, a signboard, or a picture.

It is a figure for demonstrating one Embodiment of an illuminating device. It is a figure for demonstrating one Embodiment of an illuminating device. It is a figure for demonstrating one Embodiment of an illuminating device. It is a figure for demonstrating one Embodiment of an illuminating device. It is a figure for demonstrating one Embodiment of an illuminating device. It is a figure for demonstrating one Embodiment of an illuminating device. It is a figure for demonstrating one Embodiment of an illuminating device. It is a figure for demonstrating one Embodiment of an illuminating device. It is a figure for demonstrating an example of a light source part.

Hereinafter, embodiments will be described.
FIG. 1 is a diagram for explaining one embodiment of an illumination device that illuminates a planar illumination surface of an object to be illuminated.
In FIG. 1A, reference numeral 30 indicates an object to be illuminated. The illumination object 30 has a planar illumination surface. The “planar surface to be illuminated” includes not only the case where the surface to be illuminated is “a flat surface” but also “the case where the surface has unevenness, undulations, undulations, etc. that can be regarded as a plane in practice”.
The illuminated object 30 is a poster in the example described below, and the “illuminated surface is a rectangular shape”, and the entire area of the rectangular shape is the illuminated surface. Hereinafter, the illuminated object 30 is also referred to as “poster 30”. Further, since there is no fear of confusion, it is also referred to as an illuminated surface 30 instead of the poster 30.
In FIG. 1A, reference numeral 10 denotes a light source unit, and reference numeral 20 denotes an optical system. The optical system 20 has “positive refractive power”.
In the embodiment of FIG. 1, the light source unit 10 is configured by “one solid light source”, and the solid light source is an LED (light emitting diode). Hereinafter, the light source unit 10 is also referred to as a solid light source 10 or an LED 10. The LED 10 emits white light. For example, a fluorescent white LED can be used as the LED 10.
As shown in FIG. 1B, the LED 10 includes a rectangular light emitting unit 11.

The optical system 20 having positive refractive power is a positive lens in the example of FIG.
In FIG. 1, the optical system 20 is simplified and depicted as a single biconvex lens. However, the present invention is not limited to this, and any lens shape may be used as long as it has a positive refractive power. The lens system is not limited to one, and can be configured as a lens system including a plurality of lenses. When the optical system 20 is constituted by a plurality of lenses, it is sufficient that the entire lens system has a positive refractive power, and it goes without saying that a negative lens may be included in the plurality of lenses.
Hereinafter, for convenience, the optical system 20 is also referred to as a lens 20.

The light beam emitted from the rectangular light emitting unit 11 of the solid-state light source 10 is imaged by the lens 20 having a positive power to form an image Im10.
In the illumination device shown in FIG. 1, the image Im <b> 10 is a real image by the lens 20 of the rectangular light emitting unit 11 of the solid light source 10 and is an enlarged image. The image Im10 is formed at the position of the surface of the poster 30 (illuminated surface) or in the vicinity thereof.
FIG. 1 shows a case where the image Im10 is formed at the position of the surface (illuminated surface) of the poster 30. FIG. FIG. 1C shows this state, and the image Im10 has substantially the same shape as the illuminated surface 30 as shown.
As described above, when the image Im10 of the light emitting unit 11 is formed in substantially the same shape as the surface to be illuminated 30, and the imaging position and the surface to be illuminated 30 are matched, the surface to be illuminated 30 is changed to “its shape and size”. It can be illuminated without waste.

The imaging position of the image Im10 may be in the vicinity of the illuminated surface position. When the position of the illuminated surface moves away from the imaging position of the image Im10, the shape of the illumination area that irradiates the illuminated surface becomes blurred. However, even if the contour is somewhat blurred, the actual shape of the entire illuminated surface There is no problem if illumination can be effectively performed according to "and size". The position of the image Im10 at which such effective illumination is possible is referred to as “near the illuminated surface”.
FIG. 1 shows a case where the “shape and size” of the image Im10 is approximately the same size as the illuminated surface of the poster 30, but the size of the image Im10 is “imaged on the illuminated surface 30”. The shape may be included in the region, and the shape may not necessarily match the shape of the illuminated surface 30.
It goes without saying that the position of the image Im10 can be displaced by adjusting the positional relationship between the solid light source 10 and the lens 20, and the position of the image Im10 can be adjusted with respect to the surface of the poster 30.

FIG. 2 shows another embodiment of the lighting device.
In order to avoid complications, the same reference numerals as in FIG. 1 are used for those that are not likely to be confused.
In FIG. 2A, reference numerals 10, 20, and 30 denote a light source unit (also referred to as a solid light source or LED), an optical system having a positive power (also referred to as a lens), and a cover, respectively, as in FIG. Illuminated objects (also referred to as posters or illuminated surfaces) are shown.
The symbol AP in FIG. 2A indicates “aperture”. As shown in FIG. 2B, the aperture AP has a rectangular opening APO. The light beam emitted from the solid-state light source 10 irradiates the aperture AP, and the light beam that has passed through the aperture APO is converted into an image beam by the lens 20 to form an image ImAPO that is an enlarged image of the aperture APO.
In the embodiment of FIG. 1, the shape of the image Im10 is uniquely fixed by the shape of the light emitting portion 11 of the solid light source 10, but in the embodiment of FIG. 2, the shape of the opening APO of the aperture AP. 2 is set to “similar to the shape of the poster 30 (the surface to be illuminated)”, an image ImAPO that is substantially the same shape and size as the surface to be illuminated 30 can be formed as shown in FIG. it can.
In this way, when the image ImAPO of the opening APO is formed to be approximately the same shape and size as the illuminated surface 30 of the object to be illuminated, and the imaging position is matched with the illuminated surface, the illuminated surface 30 is “ It is possible to illuminate without waste depending on “shape and size”.
As in the example of FIG. 1, the imaging position of the image ImAPO may be a “neighboring position” that is far from the illuminated surface position to the extent that effective illumination is possible in practice.

  In the example shown in FIGS. 1 and 2, the optical axis of the lens 20 is orthogonal to the surface of the poster 30, and the light emitting portion of the LED 10 is on the optical axis of the lens 20. If the position of E is as shown in the figure, the person who sees the poster does not “obstruct the illumination light beam” and can see the well-lit poster 30.

FIG. 3 shows another embodiment of the lighting device. In order to avoid complications, the same reference numerals as in FIG. 1 are used in FIG. 3 for those that are not likely to be confused.
In the embodiment shown in FIG. 3, the imaging light flux by the lens 20 is folded back to the solid light source 10 side by the mirror member PM arranged on the image side of the lens 20 in the embodiment shown in FIG. The enlarged image ImAPO of the aperture APO of the aperture AP is formed on the post 30 to illuminate the poster 30.
In the embodiment of FIG. 3 as well, by setting the shape of the opening APO of the aperture AP to be similar to the shape of the poster 30, an image ImAPO having substantially the same shape and the same size as the poster 30 can be formed. The illuminated surface 30 can be illuminated without waste according to “its shape and size”.
As in the example of FIG. 1, the imaging position of the image ImAPO may be a “neighboring position” that is far from the illuminated surface position to the extent that effective illumination is possible in practice.
Although the mirror member PM used in the embodiment of FIG. 3 is a “plane mirror”, not only a plane mirror but also a convex mirror or a concave mirror can be used as the mirror member.
In the embodiment shown in FIG. 4, a mirror member CM is provided on the image side of the lens 20, the imaging light beam formed by the lens 20 is folded back to the solid light source 10 side, and the aperture APO of the aperture AP is enlarged on the surface of the poster 30. An image ImAPO is formed to illuminate the illuminated part 30.
The mirror member CM is a “convex mirror”. When the mirror member CM of the convex mirror is used, the divergence angle of the reflected imaging light beam can be increased, and the size of the image ImAPO can be increased.
In addition, the size of the image ImAPO can be reduced by using a “concave mirror” as a mirror member.

  The size of the image ImAPO can be changed by changing the shape of the reflecting surface of the mirror member to “planar / convex / concave” and changing the curvature of the reflecting surface, thereby changing the size of the illumination area that illuminates the illuminated portion 30. be able to.

  When the mirror member is a convex mirror or a concave mirror, since the mirror member itself has a positive refractive power, the imaging magnification of the image ImAPO is “composite positive refraction between the lens 20 and the mirror member (convex mirror or concave mirror)”. Determined by “force”.

The shape of the aperture APO of the aperture AP is set to be similar to the shape of the illuminated surface of the poster 30 and the “composite positive refractive power” between the lens 20 and the mirror member is set according to the size of the illuminated surface. By doing so, an image ImAPO that is substantially the same shape and size as the poster 30 can be formed, and the surface of the poster 30 that is the illumination target surface can be illuminated without waste according to “its shape and size”. .
As in the example of FIG. 1, the imaging position of the image ImAPO may be a “neighboring position” that is far from the illuminated surface position to the extent that effective illumination is possible in practice.
In the above, it has been described that the size of the image ImAPO can be reduced by using a concave mirror as a mirror member. In this case, however, the “negative refractive power” of the concave mirror is used, and the combined positive refractive power with the lens 20 is used. Is reduced, the size of the image ImAPO is reduced.
The concave mirror can also be used as a real image imaging system.
FIG. 5 shows an embodiment of such a case.
In the embodiment of FIG. 5, the lens 20 forms an image Imint of the aperture APO of the aperture AP as an “intermediate image”. The mirror member CM1, which is a concave mirror, forms an enlarged image ImAPO of the opening on the surface of the poster 30 using the intermediate image Imint as an object.
In this case, since the concave mirror which is the mirror member CM has a positive refractive power, the imaging magnification of the image ImAPO is determined by the “composite positive refractive power” of the lens 20 and the mirror member CM.
The shape of the aperture APO of the aperture AP is set to be similar to the shape of the poster 30, and the “composite positive refractive power” between the lens 20 and the mirror member CM is set according to the size of the illuminated surface 30. Thus, an image ImAPO having substantially the same shape and size as the poster 30 can be formed, and the surface of the poster 30 that is the illuminated surface can be illuminated without waste according to “its shape and size”.
As in the example of FIG. 1, the imaging position of the image ImAPO may be a “neighboring position” that is far from the illuminated surface position to the extent that effective illumination is possible in practice.

As in the embodiment shown in FIG. 3 to FIG. 5, the imaged light flux by the lens 20 is folded back to the solid light source 10 side by the mirror members PM, CM, CM1, etc. It goes without saying that the present invention can also be applied to the embodiment described.
If the imaging light flux by the lens 20 is folded back to the solid light source 10 side by a mirror member, the long optical path from the lens 20 to the illuminated surface is folded, thereby reducing the distance between the illumination device and the illuminated surface, It becomes possible to arrange | position an illuminating device close to a to-be-illuminated surface.

The embodiment shown in FIG. 6 is an example in which a collimator optical system 40 that converts a light beam from the solid-state light source 10 into a parallel beam is added to the embodiment shown in FIG. As the collimator optical system 40, various known collimator lenses can be used.
By using the collimator optical system 40, the divergent light beam emitted from the solid light source 10 can be effectively condensed toward the opening APO of the aperture AP, and the light emitted from the solid light source 10 can be used. The efficiency can be improved effectively, and the illuminated surface 30 can be illuminated more brightly with the enlarged image ImAPO.
The embodiment shown in FIG. 7 is an example in which an integrator optical system 50 that equalizes the light intensity distribution of a light beam is provided between the collimator optical system 40 and the aperture AP.
The integrator optical system 50 includes a fly-eye lens 51 and a condenser lens 52. The divergent light beam from the solid-state light source 10 is converted into a parallel light beam by the collimator optical system 40, enters a known fly-eye lens 51, and becomes an independent small-diameter light beam by each fly-eye lens. These small-diameter light beams are superimposed on each other by the condenser lens 52 and synthesized as a “light beam with uniform light intensity” at the position of the opening APO of the aperture AP.
When such a “light beam with uniform light intensity” is used, the illuminance of the image ImAPO imaged on or near the illuminated surface 30 is made uniform, so that the illuminated surface is illuminated with uniform illuminance. Is done.
Even in the case of the embodiment shown in FIG. 1, it is possible to make the illuminance of an image formed on the illuminated surface or its vicinity uniform, one example of which is shown in FIG.
The embodiment shown in FIG. 8 is an example in which a well-known “light pipe 60” is disposed between the solid light source 10 and the lens 20 as shown in FIG. In the illustrated example, the light pipe 60 includes an optical transmission unit 61 having a rectangular cross-sectional shape as illustrated in FIG. The light transmission unit 61 is hollow and penetrates the light pipe 60 in a tunnel shape in the longitudinal direction. For this reason, the light pipe is sometimes called a “light tunnel”. The end face on the solid light source 10 side of the light transmission unit 61 is called an “incident end face”, and the end face on the lens 20 side is called an “exit end face”.
When the divergent light beam emitted from the solid-state light source 10 is incident from the incident end surface of the light pipe 60, it is transmitted toward the exit end surface while being reflected by the peripheral wall of the light transmission unit 61. The light flux emitted from the exit end face is made uniform in light intensity on the cross section of the light flux.
Therefore, if the enlarged image Im11 of the exit end face of the light pipe 60 is formed at the position of the illuminated surface 30 or in the vicinity thereof by the lens 20, the formed image Im11 has uniform light intensity. Therefore, the illuminated surface 30 can be illuminated with a uniform illuminance distribution.
A condensing lens may be arranged between the LED 10 and the incident end face of the light pipe 60 so that the divergent light beam from the LED 10 is condensed at the position of the incident end face.

In the embodiment described above with reference to FIGS. 2 to 7, the aperture AP is used, and the image ImAPO of the opening APO by the lens 20 is represented by the position of the illuminated surface 30 of the illuminated object or in the vicinity thereof. To form an image.
Therefore, as described above, by setting the shape of the opening APO of the aperture AP to be similar to the shape of the object to be illuminated (poster 30 in the above example), an image having substantially the same shape and size as the object to be illuminated. ImAPO can be imaged, and the surface to be illuminated can be illuminated without waste according to “its shape and size”.
In this case, in order to increase the versatility of the lighting device and to be able to illuminate various illuminated objects having various “sizes and shapes to be illuminated”, the shape and size of the illuminated surface must be changed. Plural types of apertures with correspondingly shaped openings are prepared so as to be replaceable, for example, in a turret type, and appropriate apertures are selected according to the shape and size of the illuminated surface of the object to be illuminated It may be used.

As described above, according to the present invention, the following novel illumination device can be realized.
[1]
An illumination device that illuminates a planar illumination surface of an object to be illuminated (30), comprising: a light source unit (10) including one or more solid light sources; and an optical system (20) having a positive power And illuminating the surface to be illuminated by forming an image of the light beam from the light source unit on or near the surface to be illuminated by the optical system according to the shape and size of the surface to be illuminated (30). Illuminating device for performing (FIGS. 1 to 8).

[2]
[1] The illumination device according to [1], wherein the one or more solid-state light sources (10) include a rectangular light emitting unit (11), and the optical system (20) having the positive power has the rectangular shape. An illuminating device that illuminates a rectangular region of the illuminated surface (30) by forming an enlarged image (Im10) of the light emitting section on or near the illuminated surface (FIG. 1).

[3]
[1] The illumination device according to [1], in which light from the light source unit is incident from an incident end surface between the light source unit (10) and the optical system (20) having the positive power, and an emission end surface. A light pipe (60) for emitting a light beam with uniform light intensity toward the optical system, and the optical system receives an enlarged image (Im11) of the exit surface (61) of the light pipe. An illumination device (FIG. 8) that forms an image on or near the illumination surface (30).

[4]
[1] The illumination device according to [1], wherein an opening shape corresponding to a shape of the illuminated surface (30) is provided between the light source unit (10) and the optical system (20) having the positive power. The optical system having an aperture (AP) and having a positive power forms an illuminating apparatus (ImAPO) that forms an enlarged image (ImAPO) of the aperture (APO) of the aperture on or near the illuminated surface (see FIG. 2 to 7).

[5]
[4] The illumination device according to [4], including a collimator optical system (40) that collimates a light beam from the light source unit between the light source unit (10) and the aperture (AP). 6 and 7).

[6]
[5] The illumination device according to [5], further including an integrator optical system (50) that uniformizes a light intensity distribution of a light beam between the collimator optical system (40) and the aperture (AP). 7).

[7]
[4] The lighting device according to any one of [6], wherein a plurality of apertures having different shapes of the openings (AP) are replaceable.

[8]
The illumination device according to any one of [1] to [7], wherein the mirror member reflects the imaged light beam by the optical system (20) having the positive power toward the illuminated surface (30). Illumination device (FIGS. 3 to 5) having one or more (PM, CM, CM1).

[9]
[8] The illumination device according to [8], wherein the one or more mirror members (PM) include a plane mirror, a convex mirror, or a concave mirror (FIGS. 3 and 4).

[10]
[8] The illuminating device according to [8], wherein the one or more mirror members (CM1) are concave mirrors, and the optical system (20) having the positive power is located closer to the object side than the concave mirror (CM1). An illumination device (FIG. 5) that forms an image of the opening as an intermediate image Imint, and the concave mirror (CM) enlarges the intermediate image to form an image on or near the illuminated surface.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above, and the invention described in the claims unless otherwise specified in the above description. Various modifications and changes are possible within the scope of the above.
For example, as one or more solid-state light sources constituting the light source unit, a semiconductor laser (LD), an organic EL element, or the like can be used in addition to the LEDs exemplified above. The optical system having positive power can use a concave mirror instead of the lens or the lens system.

  Moreover, in order to obtain “white light” as illumination light, the case where “fluorescent white LED” is used as one solid-state light source 10 constituting the light source unit of the embodiment described above has been described. The configuration of the part is not limited to this case.

FIG. 9 shows an example of a light source unit that obtains white light using a plurality of solid light sources.
FIG. 9A shows an example applied to the example described with reference to FIG.
The light source unit 10 includes LEDs 10R, 10G, and 10B as three solid light sources. The LED 10R emits red light LR, the LED 10G emits green light LG, and the LED 10B emits blue light LB.
The light source unit 10 also has dichroic means for combining the red light LR, the green light LG, and the blue light LB. The dichroic means includes a dichroic filter DF1 that transmits green light LG and blue light LB and reflects red light LR, and a dichroic filter DF2 that transmits green light LG and red light LR and reflects blue light LB. As shown in FIG.
Using such dichroic means, the white light LW can be synthesized by synthesizing the red light LR, the green light LG, and the blue light LB. The white light LW is incident on the lens 20 and an enlarged image of the light emitting part of the LEDs 10R, 10G, and 10B is formed near the position of the illuminated surface or near the loss.
Accordingly, the light emitting units of the LEDs 10R, 10G, and 10B are positioned so that the object distance from the lens 20 is equal.
FIG. 9B shows a case where the aperture AP is irradiated with white light LW obtained from the light source unit 10 shown in FIG. In this case, it is sufficient that the white light LW is synthesized, and the positions of the LEDs 10R, 10G, and 10B do not necessarily have to be equidistant from the lens 20.
in this way. When the aperture AP is irradiated with the white light LW, the red light LR, the green light LG, and the blue light LB from the LEDs 10R, 10G, and 10B are previously converted into parallel light beams by a separate collimator lens, and then the white light LW by the dichroic means. You may make it synthesize | combine.

Moreover, although the example of "posta" was given as the to-be-illuminated object 30 above, the to-be-illuminated object is not limited to the poster, and may be a signboard or various boards, or a painting or the like. It goes without saying that it can be done.
The effects described in the embodiments of the present invention are merely a list of suitable effects resulting from the invention, and the effects of the present invention are not limited to those described in the embodiments.

10 Light source section (also referred to as solid light source or LED)
11 Light emitting part
20 Optical system with positive power (also called lens)
30 Object to be illuminated (also called poster)
Im10 Magnified image of light emitting unit 11 by optical system 20
AP aperture
APO aperture opening
PM mirror material
Magnified image of aperture APO by ImAPO optical system 20
Imint Intermediate image of the aperture APO imaged by the optical system 20
40 Collimator optics
50 Integrator optics
E eyes

JP 2003-195790 A

When the mirror member is a convex mirror or a concave mirror, the mirror member itself has a negative or positive refractive power. Therefore, the imaging magnification of the image ImAPO is “synthetic positive refraction between the lens 20 and the mirror member (convex mirror or concave mirror)”. Determined by “force”.

The shape of the aperture APO of the aperture AP is set to be similar to the shape of the illuminated surface of the poster 30 and the “composite positive refractive power” between the lens 20 and the mirror member is set according to the size of the illuminated surface. By doing so, an image ImAPO that is substantially the same shape and size as the poster 30 can be formed, and the surface of the poster 30 that is the illumination target surface can be illuminated without waste according to “its shape and size”. .
As in the example of FIG. 1, the imaging position of the image ImAPO may be a “neighboring position” that is far from the illuminated surface position to the extent that effective illumination is possible in practice.
In the above, it has been described that the size of the image ImAPO can be reduced by using a concave mirror as a mirror member. In this case, the “ positive refractive power” of the concave mirror is used, and the combined positive refractive power with the lens 20 is used. Is reduced, the size of the image ImAPO is reduced.
The concave mirror can also be used as a real image imaging system.
FIG. 5 shows an embodiment of such a case.
In the embodiment of FIG. 5, the lens 20 forms an image Imint of the aperture APO of the aperture AP as an “intermediate image”. The mirror member CM1, which is a concave mirror, forms an enlarged image ImAPO of the opening on the surface of the poster 30 using the intermediate image Imint as an object.
In this case, since the concave mirror which is the mirror member CM has a positive refractive power, the imaging magnification of the image ImAPO is determined by the “composite positive refractive power” of the lens 20 and the mirror member CM.
The shape of the aperture APO of the aperture AP is set to be similar to the shape of the poster 30, and the “composite positive refractive power” between the lens 20 and the mirror member CM is set according to the size of the illuminated surface 30. Thus, an image ImAPO having substantially the same shape and size as the poster 30 can be formed, and the surface of the poster 30 that is the illuminated surface can be illuminated without waste according to “its shape and size”.
As in the example of FIG. 1, the imaging position of the image ImAPO may be a “neighboring position” that is far from the illuminated surface position to the extent that effective illumination is possible in practice.

Claims (10)

An illumination device that illuminates a planar illumination surface of an object to be illuminated,
A light source unit including one or more solid light sources, and an optical system having a positive power,
An illumination device that illuminates the illuminated surface by forming a light beam from the light source section on the illuminated surface or in the vicinity thereof according to the shape and size of the illuminated surface by the optical system. The lighting device according to claim 1,
The at least one solid-state light source has a rectangular light emitting portion, and the optical system having the positive power forms an enlarged image of the rectangular light emitting portion on or near the illuminated surface. A lighting device for illuminating a rectangular region of the illuminated surface. The lighting device according to claim 1,
Between the light source unit and the optical system having the positive power, light from the light source unit is incident from an incident end surface, and a light beam with uniform light intensity is emitted from the exit end surface toward the optical system. And an optical device that forms an enlarged image of an exit surface of the light pipe on or near an illuminated surface. The lighting device according to claim 1,
Between the light source unit and the optical system having the positive power, an aperture having an aperture shape corresponding to the shape of the illuminated surface,
The optical device having the positive power is an illumination device that forms an enlarged image of the aperture of the aperture on or near the illuminated surface. The lighting device according to claim 4,
An illuminating device having a collimator optical system for converting a light beam from the light source unit into a parallel beam between the light source unit and the aperture. The lighting device according to claim 5,
An illuminating device having an integrator optical system for uniformizing a light intensity distribution of a light beam between the collimator optical system and the aperture. The illumination device according to any one of claims 4 to 6,
A lighting device having a plurality of apertures having different shapes of the openings in a replaceable manner. The illumination device according to any one of claims 1 to 7,
An illuminating device having at least one mirror member that reflects an imaged light beam by the optical system having positive power toward the surface to be illuminated. The lighting device according to claim 8,
The illumination device in which the one or more mirror members include a plane mirror, a convex mirror, or a concave mirror. The lighting device according to claim 8,
The one or more mirror members are concave mirrors;
The optical system having the positive power forms an image of the aperture of the aperture as an intermediate image closer to the object side than the concave mirror, and the concave mirror magnifies the intermediate image to form the surface to be illuminated or its An illumination device that forms an image in the vicinity.

Images