JP2016134377A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture eliminating a phosphor, and used in a vehicular head lamp having a wide-band spectrum.SOLUTION: A lighting fixture has: a light source part 20 configured to spatial or temporal coherent generate input light WL; a diffusion reflection member 31 configured to diffuse and reflect the input light to generate diffusion light DL; light collection mirror 32 configured to collect the diffusion light to generate collection light FL; and a projection lens 33 configured to project the collection light to generate projection light.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lamp, and more particularly to a lamp used for a vehicle headlamp.

  In recent years, light emitting elements such as light emitting diodes (LEDs) and semiconductor lasers (LDs) have come to be used for lamps with higher brightness and lower power consumption. When a light-emitting diode or a semiconductor laser is used for lighting applications such as a lamp, the light emitted from the light-emitting element is incident on the phosphor to convert the wavelength (emission color) of a part of the light, and the wavelength is converted. White light is extracted to the outside by a color mixture of light and light emitted from the light emitting element.

  For example, Patent Document 1 discloses a vehicular lamp including a semiconductor light emitting element that emits laser light and a phosphor that emits visible light by entering the laser light. Patent Document 2 discloses a vehicular lamp including a laser light source and a light-emitting member made of a phosphor that receives and emits laser light from the laser light source. Patent Document 3 discloses a light-emitting device that includes a plurality of excitation light sources that emit a plurality of excitation lights and a light-emitting unit that emits fluorescence upon receiving the excitation lights.

JP 2014-135159 JP Japanese Patent Laid-Open No. 2014-22084 JP 2014-17096 A

  For example, when configuring a vehicular lamp, the light source is required to have high luminance (light output). For this reason, as a light source used for a vehicle lamp, a laser is preferable to a light emitting diode. For example, when a lamp is configured using a laser that emits blue light as excitation light, a phosphor that emits yellow light in response to blue light is used as the phosphor. Thereby, the blue light from the laser and the yellow light from the phosphor are mixed, and the light extracted outside is recognized as white light. However, in this case, it cannot be said that white light (light close to sunlight) is strictly obtained. Specifically, most of the extracted light is composed of a blue light component and a yellow light component, and hardly contains light of other colors. Therefore, there is room for improvement in extracting light having high color rendering properties (large spectral width).

  In addition, since the excitation light emitted from the laser has a high output, the region of the phosphor on which the excitation light is incident may be damaged early. Therefore, when a lamp is configured by combining a laser and a phosphor, the life of the lamp may be shortened. In addition, it may cause color unevenness such as partial recognition of blue light. Further, when the excitation light is directly incident on the eyes, the eyes may be damaged.

  The present invention has been made in view of the above points, and an object thereof is to provide a lamp that does not require a phosphor and has a broad spectrum.

  The lamp according to the present invention includes a light source that generates spatially or temporally coherent input light, a diffuse reflection member that diffuses and reflects the input light to generate diffused light, and collects the condensed light by collecting the diffused light. And a projection lens that projects the condensed light to generate projection light.

(A) is sectional drawing which shows the structure of the lamp of Example 1, (b) is a figure which shows typically the course of the light in the lamp of Example 1. FIG. (A) is a figure which shows the structure of the light source in the lamp of Example 1, (b) is a figure which shows the spectrum of the light produced | generated from the light source. (A) is a figure which shows the structure of the output end part in the lamp of Example 1, and the surface shape of the light at the time of injecting into a diffuse reflector, (b) and (c) are other surface shapes of the said light It is a figure which shows the example of. (A) And (b) is a figure which shows typically the intensity distribution of the diffused light produced | generated in the diffuse reflection board of the lamp of Example 1. FIG. It is a figure which shows the structure of the projection light taken out from the lamp which concerns on Example 1. FIG. FIG. 6 is a diagram illustrating a configuration of a lamp body in a lamp according to a modification example of Example 1.

  Examples of the present invention will be described in detail below.

  FIG. 1A is a cross-sectional view illustrating a configuration of a lamp 10 according to the first embodiment. The lamp 10 includes a light source unit 20 and a lamp unit 30. In the present embodiment, the case where the lamp 10 is a vehicle headlamp will be described. FIG. 1B is a diagram schematically illustrating an optical path in the lamp unit 30 when the lamp 10 is viewed from the side. The light source unit 20 includes a light source 21 that generates whitened and spatially or temporally coherent input light WL. The light source 21 is provided with an output unit 22 that outputs the input light WL and a heat radiating unit 23 that radiates heat generated from the light source 21. The light source 21 is provided with a wiring CB connected to a power source (not shown) and a control unit (not shown). Further, the input light WL is guided to the lamp body 30 by the light guide section 24.

  The lamp unit 30 diffuses and reflects the input light WL from the light source 21 to generate the diffused light DL, and condenses the diffused light DL from the diffused reflective member 31 to collect the condensed light FL. It has the condensing mirror 32 to produce | generate, and the projection lens 33 which projects the condensing light FL from the condensing mirror 32, and produces | generates the projection light PL.

  The diffuse reflection member 31 has, for example, a flat plate shape, and has, for example, a white alumina plate, a titanium oxide plate, a silicon oxide plate, or the like having a high reflectance with respect to visible light (for example, 90% or more), or aluminum as a main component. It is made of a ceramic member such as an alumina plate, a titanium oxide plate containing titanium oxide as a main component, or a silicon oxide plate containing silicon oxide as a main component. Further, the diffuse reflection member 31 is made of a reflection type diffractive optical element member having a high reflectance with respect to visible light, or a resin plate having a high visible light reflectance (for example, 90% or more) containing ceramic particles or metal particles. It may be configured. Further, the diffuse reflection member 31 may be fixed or embedded on a substrate (not shown) made of a material such as metal, ceramic, and epoxy resin. A member having high light reflectivity may be provided on the side surface of the diffuse reflection member 31.

  The condensing mirror 32 can be formed, for example, by forming a film having high light reflectivity such as aluminum or silver on the surface of a molded body formed of resin or the like. Moreover, the condensing mirror 32 may be covered with the protective film. The projection lens 33 is made of a material that is transparent to the input light WL, such as glass, polycarbonate, or acrylic.

  The input light WL guided from the light source unit 20 by the light guide unit 24 is output from the output end LP of the light guide unit 24 toward the diffuse reflection member 31. In the present embodiment, the condenser mirror 32 is provided with a through hole, and the input light WL emitted from the emission end LP enters the diffuse reflection member 31 through the through hole. The diffuse reflection member 31 has a flat plate shape, for example, and receives the input light WL on one main surface (hereinafter referred to as a light receiving surface) 31S. The light receiving portion of the input light WL on the light receiving surface 31 </ b> S of the diffuse reflection member 31 functions as the first focal point F <b> 1 of the condenser mirror 32 in the lamp body 30. The input light WL incident on the diffuse reflection member 31 is diffused and reflected at the first focal point F1, and becomes diffused light DL.

  As shown in FIG. 1B, the diffused light DL proceeds radially from the first focal point F <b> 1 and enters the condenser mirror 32. The diffused light DL is condensed on another focal point (second focal point) F2 by the condenser mirror 32. That is, the diffuse reflection member 31 receives the input light WL at the first focal point F1 of the condensing mirror 32 and generates the diffused light DL. The condensing mirror 32 condenses the diffused light DL at the second focal point F <b> 2 of the condensing mirror 32. The first and second focal points F1 and F2 function as a primary focal point and a secondary focal point of the condenser mirror 32, respectively. The second focus F2 functions as the focus of the projection lens 33.

  The lamp body 30 includes a shade SH for forming a passing light distribution (so-called low beam) in an automotive headlamp. Specifically, the shade SH is configured to partially reflect the condensed light FL toward the projection lens 33. Shade SH is arrange | positioned in the lamp | ramp part 30 so that the 2nd focus F2 may be located in the edge part. The shade SH has a structure in which a highly reflective metal (for example, aluminum or silver) is formed on a heat resistant body having heat resistance, for example.

  The shade SH has a shape that forms a low beam cut-off line. The condensed light FL condensed by the condenser mirror 32 has a predetermined shape and size. Further, a part of the condensed light FL is reflected by the shade SH, so that it is formed into a low beam shape as a whole and is incident on the projection lens 33. The shade SH may be movable. For example, the shade SH is configured to be movable between a position in the optical path of the condensed light FL indicated by a solid line and a position outside the optical path of the condensed light FL indicated by a broken line. Accordingly, the lamp body 30 can form not only a low beam but also a running light distribution (so-called high beam) for the headlamp by moving the shade SH out of the optical path of the condensed light FL.

  The lamp body 30 includes a housing HS that houses a diffuse reflection member 31, a condensing mirror 32, a projection lens 33, and a shade SH. Further, the diffuse reflection member 31, the condensing mirror 32, the projection lens 33, and the shade SH are supported in the lamp body 30 by the support unit SU. In addition, an outer lens OL is provided in a region of the housing HS on the side where the projection light PL is emitted from the projection lens 33. The projection light PL is taken out through the outer lens OL. The lamp body 30 has an optical axis adjustment unit AJ that adjusts the optical axis of the lamp body 30. The optical axis adjustment unit AJ has a function of moving the diffuse reflection member 31, the condensing mirror 32, the projection lens 33, and the shade SH via the support unit SU.

  FIG. 2A is a diagram illustrating a configuration of the light source unit 20. First, the light source 21 includes a laser device LSR that generates pulsed excitation light EL, and a nonlinear member NLM made of a nonlinear material that generates input light WL based on the excitation light EL. Here, the light source 21 will be described. For example, it is known that when a pulsed laser beam having a femtosecond pulse width is incident on a nonlinear medium, the spectral width of the laser beam continuously expands. This is called a supercontinuum phenomenon, and the light obtained by this phenomenon has such a characteristic that it has a broad spectrum. Further, this supercontinuum light has higher spatial and temporal coherence than natural light.

  The light source 21 is a supercontinuum light source that generates the supercontinuum light. That is, the input light WL is a supercontinuum light having a broad spectrum (for example, a spectrum width over the entire visible range). Specifically, the nonlinear material NLM receives the excitation light EL from the laser device LSR and generates supercontinuum light. This super continuum light is close to sunlight and has high color rendering properties. Therefore, the lamp 10 does not require a phosphor, and generates and emits white light having a higher color rendering than when whitened using the phosphor.

  The diffuse reflection member 31 diffuses and reflects the spatially or temporally coherent input light WL to generate diffused light DL in which the spatial and temporal coherence of the input light WL is reduced (input light WL is converted). For example, when a polycrystalline white alumina plate is used as the diffusive reflection member 31, the reflection path length, which is the distance from the incidence to the alumina plate in the input light WL to the re-emission due to the multiple and complicated grain interfaces, is used. Increase distance. Further, the reflection direction of the input light WL on the alumina plate becomes multidirectional. This reduces the spatial and temporal coherence of the input light WL. Therefore, by providing the diffuse reflection member 31, the spatially or temporally coherent input light WL is made more natural light.

  The output unit 22 includes an ultraviolet component removing unit 22A that removes the ultraviolet component UV (see FIG. 2B) in the input light WL, and an infrared component removing unit 22B that removes the infrared component IR in the input light WL. doing. The ultraviolet component removing unit 22A includes, for example, an ultraviolet cut filter or a dichroic mirror. The infrared component removing unit 22B includes, for example, an infrared cut filter or a dichroic mirror. The configurations of the ultraviolet component removing unit 22A and the infrared component removing unit 22B are merely examples. For example, both may have the same configuration, or may have the opposite configuration and arrangement shown in the drawing. good. That is, the ultraviolet component UV and the infrared component IR of the input light WL may be removed by the ultraviolet and infrared component removing units 22A and 22B.

  The supercontinuum light from the light source 21 may have a spectral width not only in the visible region but also in the ultraviolet and infrared regions. Since the output unit 22 includes the ultraviolet and infrared component removing units 22A and 22B, the ultraviolet and infrared rays are suppressed from being taken out from the lamp 10 to the outside. Therefore, ultraviolet and infrared components unnecessary for irradiation can be removed. Moreover, since ultraviolet rays deteriorate the resin used for the projection lens 33, the outer lens OL, etc., the life of the lamp 10 is extended by removing the ultraviolet rays.

  In addition, the output part 22 has the infrared rays absorption part AB which absorbs infrared rays, as shown to Fig.2 (a). For example, when the infrared component removing unit 22B is configured from a dichroic mirror, it is preferable to provide an infrared absorbing unit AB that absorbs infrared rays separated by the dichroic mirror. The output unit 22 may include a condenser lens LZ1. The condensing lens LZ1 condenses the input light WL from which infrared rays and ultraviolet rays have been removed and guides it to the light guide unit 24. The light guide unit 24 is made of, for example, an optical fiber. The light guide 24 is made of, for example, a multimode optical fiber, and the core has a circular or rectangular cross section, for example.

  FIG. 2B is a diagram showing the spectrum of the input light WL. In the figure, the horizontal axis indicates the wavelength, and the vertical axis indicates the optical output. As shown in FIG. 2B, the input light WL has a spectral width over a wavelength range of 400 nm to 1600 nm including the entire visible range. For example, supercontinuum light has a visible light spectrum having a predetermined light output over the entire visible range. Specifically, for example, the output intensity ratio is B / A when the output intensity in the wavelength region indicating the maximum output of light is the optical output A and the output intensity in the wavelength region indicating the minimum output is the optical output B. In this case, the supercontinuum light has an output intensity ratio of, for example, 0.5 or more in the visible range. That is, almost all light emission colors are generated uniformly and with the same amount of light. Therefore, the obtained input light WL is recognized as white light, and it is not necessary to use a phosphor to obtain white light.

  Further, the lamp body 30 is guided with the input light WL from which the ultraviolet component UV and the infrared component IR are removed by the ultraviolet and infrared component removing units 22A and 22B. Further, since the input light WL uses the excitation light EL generated by laser oscillation, the input light WL has a high light output. Accordingly, input light WL having high light output and high color rendering properties is generated.

  FIG. 3A schematically shows a beam shape (a cross-sectional shape of the input beam) of the input light WL incident on the emission end LP of the input light WL provided on the lamp body 30 and the diffuse reflection member 31. It is. First, the light source 21 emits the input light WL from its emission end LP. In the present embodiment, a condensing lens LZ2 for shaping the beam shape of the input light WL at the first focal point F1 (focal plane FS) of the diffusive reflecting member 31 is provided at the emission end LP.

  In the present embodiment, the condenser lens LZ2 is configured so that the beam shape of the input light WL is shaped into a rectangle and is incident on the first focal point F1. When the input light WL having a rectangular beam shape is incident on the first focal point F1, it is easy to shape the light distribution shape of the headlamp. Specifically, first, when the input light WL to be incident on the first focal point F1 is not condensed at one point but is incident as a surface having a certain size, the light intensity distribution in the projection light PL Will occur. Since the headlamp has an intensity distribution according to the irradiation area, the intensity distribution generated in the input light WL can be used to facilitate the design of the condensing mirror 32, which is another member. is there.

  Note that the condenser lens LZ2 may be configured to shape the beam shape of the input light WL (the cross-sectional shape of the input beam) into an elliptical shape or a circular shape, as shown in FIGS. 3B and 3C. Good. When configuring a vehicle headlamp, the condensing lens LZ2 is configured so that the beam shape of the input light WL is shaped into a rectangle or an ellipse and is incident on the first focal point F1 (focal plane FS). It is preferable. Moreover, when the light guide part 24 is comprised from the optical fiber, it is preferable that the cross section of the core has a rectangular shape (for example, a rectangle or a square). When the core of the optical fiber (light guide 24) has a rectangular cross-sectional shape, the beam shape at the exit end LP of the input light WL is easily formed into a rectangle or an ellipse by the condenser lens LZ2. Because it can. In other words, it is desirable that the optical fiber that guides the input light WL to the emission end LP has a rectangular core shape.

  Next, the intensity distribution of the diffused light DL generated by the diffuse reflection member 31 will be described with reference to FIGS. 4A and 4B are diagrams schematically showing the side surface and the upper surface of the lamp body 30, respectively. First, the emission point EP of the input light WL at the emission end face LP of the input light WL passes through the line AL passing through the first and second focal points F1 and F2, and is a surface AS perpendicular to the light receiving surface 31S of the diffuse reflection member 31. Is provided inside. That is, as shown in FIG. 4B, the optical axis OA of the input light WL passes through the first and second focal points F1 and F2 and is a surface perpendicular to the light receiving surface 31S of the input light WL in the diffuse reflection member 31. It is provided in the AS.

  By arranging the emission end portion LP in this way, the light distribution shape and intensity distribution in the headlamp can be easily designed. Specifically, first, since the input light WL has coherency, the input light WL travels toward the diffuse reflection member 31 with high directivity. Therefore, as shown in FIGS. 4A and 4B, the diffused light DL has an asymmetric intensity distribution from the first focal point F1, and a region having a high intensity (a high intensity region) is partially formed. Is done. In addition, the magnitude | size of the arrow of the diffused light DL in Fig.4 (a) and (b) has shown the intensity | strength of the diffused light DL typically. By disposing the optical axis OA of the input light WL in the plane AS, the high intensity region can be formed in the plane AS.

  Then, the condensed light FL generated by the condenser mirror 32 and the projection light PL projected by the projection lens 33 after being condensed at the second focal point F2 are in the high-intensity region in the same manner as the diffused light DL. Are formed in the plane AS.

  Further, as shown in FIG. 4A, the emission end LP has a perpendicular line (first line) through which the optical axis OA of the input light WL passes through the first focal point F1 lowered on the light receiving surface 31S of the diffuse reflection member 31. (Perpendicular to the light receiving surface 31 passing through the focal point F1) and the projection lens 33 side with respect to FV. Since the optical axis OA of the input light WL is inclined toward the projection lens 33 with respect to the perpendicular FV, a high intensity region in the diffused light DL can be formed on the side far from the projection lens 33 of the condenser mirror 32. .

  The high intensity region of the diffused light DL thus formed is incident (condensed) on the second focal point F2 by the condensing mirror 32 at a low (small) incident angle. Further, the high intensity region of the condensed light FL is emitted from the second focal point F2 at a low emission angle. Accordingly, the condensed light FL is incident on the projection lens 33 at a low incident angle and is emitted from the projection lens 33 at a low emission angle. In this way, by reducing the incidence angle and the emission angle of the high intensity region of the condensed light FL with respect to the projection lens 33, the reflection loss and the refraction loss of the projection light PL can be suppressed, and the luminous flux utilization of the input light WL. Will improve. In addition, since the central region (region corresponding to the vicinity of the line AL) of the projection light PL is also a high intensity region on the surface AS, the luminous flux utilization of the input light WL is further improved.

  FIG. 5 is a diagram schematically illustrating the configuration of the projection light PL when the lamp 10 is mounted on the vehicle VE. The projection light PL has a hot region HR that is a region that illuminates the far distance of the vehicle, a wide region WR that is a region that illuminates the vicinity of the vehicle at a wide angle, and a middle region MR that is an intermediate irradiation region. Yes. The beam shape of the input light WL by the condenser lens LZ2 described with reference to FIGS. 3A to 3C is shaped into a rectangle or an ellipse, and has been described with reference to FIGS. 4A and 4B. By arranging the optical axis OA of the input light WL in the plane AS, the long side of the rectangular or elliptical input light WL is arranged so as to be orthogonal to the line AL, and the projection light PL as shown in FIG. Can be easily formed.

  Specifically, first, the intensity distribution can be generated in the projection light PL by shaping the beam shape of the input light WL by the condenser lens LZ2. Specifically, in the projection light PL, the central portion of the irradiation area corresponding to the vicinity of the first focal point F1 has a relatively high intensity, and the intensity decreases as it approaches the outer edge. By providing the optical axis OA of the input light WL within the plane AS, the central region of the projection light PL has a large intensity corresponding to the high intensity region of the input light WL. Therefore, the irradiation possible distance of the hot region HR, that is, the far visibility is increased. Even when the shade SH is moved into the optical path of the condensed light FL (that is, even when a low beam is formed), the same irradiation intensity distribution can be generated. In this way, by using the lamp 10, it is possible to simplify a complicated optical design.

  If the laser light that emits blue light is converted into yellow light by a phosphor to obtain white light, the light distribution design is not easy even if the lamp is configured as described above. Specifically, for example, the intensity distribution as diffusely reflected light is different between blue light from a laser having high straightness and yellow light from a phosphor whose radiation pattern has a Lambertian distribution. Accordingly, a region in which the blue component and the yellow component are biased is formed while being diffused. For example, when a projection is performed while including a portion in which a portion where the intensity of blue light is greater than that of yellow light is generated, the irradiation region corresponding to the portion is recognized as light having a greater blue component than the peripheral portion (bluish light). Further, when white light is obtained by mixing the fluorescence of the blue phosphor, the yellow phosphor and the red phosphor using the ultraviolet laser as excitation light, the radiation pattern of the light has a Lambertian distribution. Therefore, the above-described lamp configuration can achieve a great effect by combining with the coherent input light WL having a wide spectrum.

  In this embodiment, as shown in FIGS. 4 (a) and 4 (b), the emission end LP emits the input light WL in a direction inclined with respect to the light receiving surface 31S in the surface AS. Have. However, the optical axis OA of the input light WL may be provided in a direction perpendicular to the light receiving surface 31S as long as it is provided in the surface AS. Further, the optical axis OA of the input light WL is not necessarily provided in the surface AS.

  FIG. 6 is a diagram illustrating a configuration of a lamp body 30A in a lamp 10A according to a modification of the first embodiment. In FIG. 6, the housing HS, the outer lens OL, and the support part SU are not shown. The lamp 10A has the same configuration as that of the lamp 10 except for the configuration of the lamp body 30A. As shown in FIG. 6, in this modification, the lamp body 30A includes a translucent member BD having translucency with respect to the input light WL, and a reflective diffusion member 31A fixed to the translucent member BD. And a condensing mirror 32A and a projection lens 33A. The translucent member BD is provided so as to fill a space including the optical paths of the input light WL, the diffused light DL, and the condensed light FL.

  The shade SH is rotatably attached to the translucent member BD. The translucent member BD has a moving mechanism MV configured to move the shade SH out of the optical path of the condensed light FL. That is, when the moving mechanism MV rotates, the shade moves to a position (a position indicated by a broken line in FIG. 6) outside the optical path of the condensed light FL. Therefore, both the high beam and the flow beam can be formed by moving the position of the shade SH. Although the case where the moving mechanism MV and the shade SH are rotationally moved has been described here, the moving mechanism MV and the shade SH may be configured to perform a linear movement as well as a rotational movement.

  The diffuse reflection member 31 </ b> A is embedded with a covering portion CO except for a portion in contact with the translucent member BD. The translucent member BD is made of a material such as glass, polycarbonate, or acrylic. The covering portion CO is made of, for example, ceramic such as glass, alumina, or silicon oxide, resin, or metal.

  In the present modification, a translucent member BD that fills a space including the optical paths of the input light WL, the diffused light DL, and the condensed light FL is provided. Accordingly, the diffused light DL and the condensed light FL are generated in the translucent member BD. In addition, the input light WL, the diffused light DL, and the collected light FL travel through the translucent member BD, and are then projected as the projection light PL. In this modification, the incident surface on which the input light WL is incident on the translucent member BD can be used (formed) as a condensing lens, and the condensing lens LZ2 at the exit end LP (FIG. 3A). Can be omitted.

  In the above description, the case where a supercontinuum light source is used as the light source 21 has been described. However, a light source capable of obtaining a spatially or temporally coherent and broadband spectrum without using a phosphor is used as a supercontinuum light source. It can be used instead. For example, it is possible to obtain white light by superimposing each light using a laser emitting red light, green light and blue light as a light source. That is, the light source 21 may include a laser device LSR composed of a plurality of lasers having different emission colors. In this case, the nonlinear material NLM need not be provided. Further, another device that generates supercontinuum light may be used in place of the laser device LSR and the nonlinear material NLM.

  Moreover, the structure of the light source part 20 and the lamp body part 30 (30A) is only an example. Further, the shade SH is not necessarily provided. The output unit 22 may not include the ultraviolet and infrared component removing units 22A and 22B. Moreover, the heat radiating part 23 may not be provided.

10, 10A Lamp 20 Light source 21 Light source 30 Lamp body 31 Diffuse reflection member 31S Light receiving surface 32 Condensing mirror 33 Projection lens F1 First focus F2 Second focus WL Input light DL Diffused light FL Condensed light PL Projected light LP Output end OA Optical axis AS surface of input light

Claims (10)

A light source that generates spatially or temporally coherent input light;
A diffuse reflection member that diffuses and reflects the input light to generate diffuse light;
A condensing mirror that collects the diffused light and generates condensed light;
A lamp having a projection lens that projects the condensed light to generate projection light.   The lamp according to claim 1, wherein the input light is supercontinuum light.   The lamp according to claim 2, wherein the supercontinuum light has a visible light spectrum having a light output over the entire visible range.   4. A condensing lens that forms a beam shape of the input light into a rectangle or an ellipse and makes it incident on the diffuse reflection member is provided at the output end of the input light. A lamp according to any one of the above.   The lamp according to claim 4, wherein the optical fiber that guides the input light to the emission end has a rectangular core shape. The diffuse reflection member receives the input light at the first focal point of the condenser mirror to generate the diffused light,
The condensing mirror condenses the diffused light on a second focal point of the condensing mirror,
The optical axis of the input light is provided in a plane that passes through the first and second focal points and is perpendicular to the light receiving surface of the input light in the diffuse reflection member. A lamp according to any one of the above.   The lamp according to claim 6, wherein the optical axis of the input light is inclined toward the projection lens with respect to a perpendicular to the light receiving surface passing through the first focal point.   8. The apparatus according to claim 1, further comprising: an ultraviolet component removing unit that removes an ultraviolet component in the input light; and an infrared component removing unit that removes an infrared component in the input light. Lamps. A shade configured to partially reflect the condensed light toward the projection lens;
A translucent member that fills a space including optical paths of the input light, the diffused light, and the condensed light, and
The lamp according to any one of claims 1 to 8, wherein the translucent member includes a moving mechanism configured to move the shade out of an optical path of the condensed light.   The lamp according to claim 1, wherein the light source includes a plurality of lasers having different emission colors.

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