JP6509570B2 - Lamp - Google Patents

Description

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

  In recent years, along with the increase in luminance and the reduction in power consumption, light emitting elements such as light emitting diodes (LEDs) and semiconductor lasers (LDs) have come to be used as lamps. When a light emitting diode or a semiconductor laser is used for lighting application such as a lamp, the light emitted from the light emitting element is made to enter 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 color mixing 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 laser light and emits visible light. Patent Document 2 discloses a vehicular lamp including a laser light source and a light emitting member made of a phosphor that emits light upon receiving laser light from the laser light source. Further, Patent Document 3 discloses a light emitting device provided with a plurality of excitation light sources for emitting a plurality of excitation lights and a light emitting unit which receives the excitation lights and emits fluorescence.

JP 2014-135159 A Unexamined-Japanese-Patent No. 2014-22084 JP, 2014-17096, A

  For example, when a vehicle lamp is configured, 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 the lamp is configured using a laser that emits blue light as excitation light, a phosphor that receives blue light and emits yellow light is used as the phosphor. As a result, the blue light from the laser and the yellow light from the phosphor are mixed, and the light extracted to the outside is recognized as white light. However, in this case, it can not 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 light of other colors is hardly contained. Therefore, there is room for improvement in extracting light having high color rendering properties (large spectral width).

  Further, 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 the lamp is configured by combining the laser and the phosphor, the life as the lamp may be shortened. In addition, partial recognition of blue light causes color unevenness. In addition, if the excitation light directly enters the eye, the eye may be damaged.

  The present invention has been made in view of the above-described points, and an object thereof is to provide a lamp having a wide band spectrum without using a phosphor.

A lamp according to the present invention comprises a light source for generating supercontinium light having a spectral width over the entire visible range, a multimode optical fiber for guiding supercontinium light, and emission from an output end of the multimode optical fiber a diffuse reflection member that generates a diffused light diffuses and reflects supercontinuum light, and a condenser mirror for forming a focused light condenses the diffused light, the projection light by projecting a light converging optical And a projection lens to be generated.
Further, a lamp according to the present invention includes a light source for generating supercontinium light having a spectral width over the entire visible range, a diffuse reflection member for diffusing and reflecting supercontinium light to generate diffused light, and diffused light And a condensing mirror having first and second focal points, and a projection lens for projecting the condensed light to generate projection light, and the diffuse reflection member Receiving the supercontinuum light at the first focal point to generate diffused light, the condensing mirror condenses the diffused light at the second focal point, and the optical axis of the supercontinuum light is in the diffuse reflecting member Provided in a plane perpendicular to the light receiving surface of supercontinuum light and passing through the first and second focal points, the diffuse reflecting member has an intensity distribution in which the diffused light has an asymmetric intensity with respect to the first focal point And other areas in the area So as to have a larger area of the strength, it is characterized by diffusing and reflecting the supercontinuum light.

(A) is sectional drawing which shows a 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 radiation | emission end part in the lamp of Example 1, and the surface shape of light at the time of entering into a diffuse reflection plate, (b) and (c) are other than the surface shape of the said light Is a diagram illustrating an example of (A) And (b) is a figure which shows typically intensity distribution of the diffused light produced | generated in the diffuse reflection plate of the lamp of Example 1. FIG. FIG. 2 is a view showing a configuration of projection light extracted from the lamp according to the first embodiment. FIG. 7 is a view showing a configuration of a lamp body portion in a lamp according to a modification of the first embodiment.

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

  FIG. 1A is a cross-sectional view showing the configuration of the lamp 10 of 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 view schematically showing 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 for outputting the input light WL and a heat radiating unit 23 for radiating heat generated from the light source 21. Further, the light source 21 is provided with a wiring CB connected to a power supply (not shown) and a control unit (not shown). Further, the input light WL is guided to the lamp unit 30 by the light guiding unit 24.

  The lamp unit 30 diffuses and reflects the input light WL from the light source 21 to generate the diffused light DL, and the diffused light DL from the diffused reflection 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 for example, a white alumina plate (for example, 90% or more) having high reflectance with respect to visible light, a titanium oxide plate, a silicon oxide plate, or aluminum. And a ceramic member such as a titanium oxide plate mainly composed of titanium oxide and a silicon oxide plate mainly composed of silicon oxide. In addition, the diffuse reflection member 31 is a reflection-type diffractive optical element member having high reflectance to visible light, or a resin plate of high visible light reflectance (for example, 90% or more) including ceramic particles and metal particles. It may be configured. In addition, 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. Further, a member having high light reflectivity may be provided on the side surface of the diffuse reflection member 31.

  The condenser 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 molded of resin or the like. The condenser mirror 32 may be covered by a protective film. The projection lens 33 is made of, for example, a material having translucency 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 guiding unit 24 is emitted from the emitting end portion LP of the light guiding unit 24 toward the diffuse reflection member 31. In the present embodiment, the light collecting mirror 32 is provided with a through hole, and the input light WL emitted from the output end LP is incident on the diffuse reflection member 31 through the through hole. The diffuse reflection member 31 has, for example, a flat plate shape, and receives the input light WL at 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 31S of the diffuse reflection member 31 functions as a first focal point F1 of the condensing mirror 32 in the lamp unit 30. The input light WL incident on the diffuse reflection member 31 is diffused and reflected at the first focal point F1 to become diffused light DL.

  The diffused light DL radially travels from the first focal point F1 as shown in FIG. The diffused light DL is condensed by the condensing mirror 32 to another focal point (second focal point) F2. 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. Further, the condensing mirror 32 condenses the diffused light DL on the second focal point F2 of the condensing mirror 32. The first and second focal points F1 and F2 function as primary and secondary focal points of the focusing mirror 32, respectively. The second focal point F2 also functions as the focal point of the projection lens 33.

  The lamp unit 30 has a shade SH for forming a passing light distribution (so-called low beam) in a headlamp for a car. Specifically, the shade SH is configured to partially reflect the collected light FL toward the projection lens 33. The shade SH is arranged in the lamp body 30 such that the second focal point F2 is located at its end. The shade SH has, for example, a structure in which a highly reflective metal (for example, aluminum or silver) is deposited on a heat-resistant body having heat resistance.

  In addition, the shade SH has a shape that forms a low beam cutoff line. The collected light FL collected by the collecting mirror 32 has a predetermined shape and size. In addition, the condensed light FL is partially shaped into a low beam shape as a whole by being reflected by the shade SH, and is incident on the projection lens 33. The shade SH may be movable. The shade SH is configured to be movable between, for example, a position in the light path of the collected light FL indicated by a solid line and a position outside the light path of the collected light FL indicated by a broken line. Therefore, by moving the shade SH out of the optical path of the condensed light FL, the lamp body 30 can form not only the low beam but also the traveling light distribution (so-called high beam) of the headlight.

  The lamp body portion 30 has a housing HS which accommodates the diffuse reflection member 31, the condenser mirror 32, the projection lens 33, and the shade SH. Further, the diffuse reflection member 31, the light collecting mirror 32, the projection lens 33, and the shade SH are supported in the lamp body 30 by the support part SU. Further, an outer lens OL is provided in a region of the housing HS on which the projection light PL is emitted from the projection lens 33. The projection light PL is extracted to the outside through the outer lens OL. The lamp unit 30 also has an optical axis adjustment unit AJ that adjusts the optical axis of the lamp unit 30. The optical axis adjustment unit AJ has a function of moving the diffuse reflection member 31, the focusing mirror 32, the projection lens 33, and the shade SH via the support unit SU.

  FIG. 2A shows the configuration of the light source unit 20. As shown in FIG. First, the light source 21 has a laser device LSR for generating the pulsed excitation light EL, and a non-linear member NLM made of a non-linear material for generating the 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 pulse width of femtoseconds is made incident on a non-linear medium, the spectral width of the laser beam is continuously expanded. This is referred to as supercontinuum phenomenon, and the light obtained thereby exhibits the property of having a broad band spectrum. Also, this supercontinuum light has higher spatial and temporal coherence than natural light.

  The light source 21 is a supercontinuum light source that generates this supercontinuum light. That is, the input light WL is super continium light having a broad spectrum (broad) spectrum, for example, a spectral width over the entire visible range. Specifically, the non-linear material NLM receives the excitation light EL from the laser device LSR, and generates supercontinuum light. This supercontinuum light is light close to sunlight and has high color rendering. Therefore, the lamp 10 does not require a phosphor, and also generates and emits white light having a higher color rendering than when whitening using a 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 coherency of the input light WL is reduced (input light Convert WL). For example, when a polycrystalline white alumina plate is used as the diffuse reflection member 31, the reflection path length which is the distance from the incidence on the alumina plate in the input light WL to the re-emission is due to the plurality of complex grain interfaces. Get more distance. Further, the reflection direction of the input light WL on the alumina plate is multidirectionalized. 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.

  The output unit 22 has an ultraviolet component removal unit 22A that removes the ultraviolet component UV (see FIG. 2B) in the input light WL, and an infrared component removal unit 22B that removes the infrared component IR in the input light WL. doing. The ultraviolet component removing unit 22A is made of, for example, an ultraviolet cut filter or a dichroic mirror. The infrared component removing unit 22B is made of, 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 an example, and may have the same configuration as each other, and even if they have the opposite configuration and arrangement as illustrated. 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. By the output unit 22 having the ultraviolet and infrared component removing units 22A and 22B, it is possible to suppress the ultraviolet and infrared radiation from being extracted from the lamp 10 to the outside. Accordingly, ultraviolet and infrared components unnecessary for irradiation can be removed. In addition, since the ultraviolet rays deteriorate the resin and the like used for the projection lens 33 and the outer lens OL, 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 of a dichroic mirror, it is preferable that an infrared absorbing unit AB that absorbs infrared rays separated by the dichroic mirror be provided. Moreover, the output part 22 may have condensing lens LZ1. The condensing lens LZ1 condenses the input light WL from which infrared light and ultraviolet light have been removed and guides the light to the light guide. The light guide 24 is made of, for example, an optical fiber. The light guide 24 is, for example, a multimode optical fiber, and the cross section of the core has, for example, a circular or rectangular shape.

  FIG. 2B is a diagram showing the spectrum of the input light WL. The horizontal axis of the figure shows the wavelength, and the vertical axis shows the light output. As shown in FIG. 2 (b), the input light WL has a spectral width over the 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, B / A when the output intensity in the wavelength region showing the maximum output of light is the light output A and the output intensity in the wavelength region showing the minimum output is the light output B is the output intensity ratio In the case, supercontinuum light has an output intensity ratio of, for example, 0.5 or more in the visible region. That is, light of almost all luminescent colors is generated evenly and with the same light quantity. 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 input light WL from which the ultraviolet component UV and the infrared component IR have been removed by the ultraviolet and infrared component removing units 22A and 22B is guided to the lamp body 30. In addition, since the input light WL uses the excitation light EL that has undergone laser oscillation, it has a high light output. Therefore, input light WL having high light output and high color rendering is generated.

  FIG. 3A is a view schematically showing the beam shape (the cross-sectional shape of the input beam) of the input light WL incident on the light emitting end portion LP of the input light WL and the diffuse reflection member 31 provided in the lamp unit 30. It is. First, the light source 21 emits the input light WL from the output end LP. In the present embodiment, the output end LP is provided with a condenser lens LZ2 for shaping the beam shape of the input light WL at the first focal point F1 (focal plane FS) of the diffuse reflection member 31.

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

  The condenser lens LZ2 is configured to shape the beam shape of the input light WL (the cross-sectional shape of the input beam) into an ellipse or a circle as shown in FIGS. Good. In addition, when the vehicle headlamp is configured, the condensing lens LZ2 is configured to shape the beam shape of the input light WL into a rectangle or an ellipse and to make it enter the first focal point F1 (focal plane FS) Is preferred. Furthermore, when the light guide 24 is made of an optical fiber, it is preferable that the cross section of the core has a rectangular (for example, rectangular or square) shape. When the core of the optical fiber (light guide portion 24) has a rectangular cross-sectional shape, the beam shape at the output end LP of the input light WL is easily shaped into a rectangle or an ellipse by the condensing lens LZ2. Because you can do it. That is, the optical fiber for guiding the input light WL to the output end LP preferably has a rectangular core shape.

  Next, with reference to FIGS. 4A and 4B, the intensity distribution of the diffused light DL generated by the diffuse reflection member 31 will be described. FIGS. 4A and 4B schematically show the side surface and the top surface of the lamp unit 30, respectively. First, the emission point EP of the input light WL at the emission end face LP of the input light WL passes a line AL passing through the first and second focal points F1 and F2 and is a plane AS perpendicular to the light receiving surface 31S of the diffuse reflection member 31. It 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 plane perpendicular to the light receiving surface 31S of the input light WL in the diffuse reflection member 31. It is provided in AS.

  By arranging the emitting end portion LP in this manner, design of the light distribution shape and the intensity distribution in the headlight becomes easy. Specifically, first, since the input light WL has coherence, it travels toward the diffuse reflection member 31 in a state of having 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 partially high intensity region (high intensity region) is formed. Be done. The sizes of the arrows of the diffused light DL in FIGS. 4A and 4B schematically indicate the intensity of the diffused light DL. By arranging the optical axis OA of the input light WL in the surface AS, the high intensity region can be formed in the surface AS.

  Then, the condensed light FL generated by the condensing mirror 32 and the projection light PL projected by the projection lens 33 after being condensed to the second focal point F2 are, like the diffused light DL, high intensity regions thereof Are formed in the plane AS.

  Furthermore, as shown in FIG. 4A, the emission end LP has a perpendicular (first line) passing through the first focal point F1 that the optical axis OA of the input light WL is lowered onto the light receiving surface 31S of the diffuse reflection member 31. It is configured to be inclined toward the projection lens 33 with respect to the vertical line FV passing through the focal point F1 of the light receiving surface 31). 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 condensing mirror 32. .

  The high intensity region of the diffused light DL formed in this manner is incident (condensed) by the condensing mirror 32 at the low (small) incident angle to the second focal point F2. Further, the high intensity region of the condensed light FL is emitted from the second focal point F2 at a low emission angle. Therefore, the condensed light FL enters the projection lens 33 at a low incident angle, and is emitted from the projection lens 33 at a low emission angle. Thus, by reducing the incident angle and the outgoing angle of the high-intensity region of the condensed light FL to the projection lens 33, it is possible to suppress the reflection loss and the refraction loss of the projection light PL, and the light flux utilization of the input light WL. Improve. Further, also on the surface AS, the central area (area corresponding to the vicinity of the line AL) of the projection light PL is a high-intensity area, and thus the luminous flux availability of the input light WL is further improved.

  FIG. 5 is a view schematically showing a configuration of the projection light PL when the lamp 10 is mounted on the vehicle VE. The projection light PL has a hot area HR which is an area for irradiating the far side of the vehicle, a wide area WR which is an area for irradiating the vicinity of the vehicle at a wide angle, and a middle area MR which is an irradiation area between them. There is. Forming the beam shape of the input light WL by the condenser lens LZ2 described with reference to FIGS. 3A to 3C into a rectangular or elliptical shape, and 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 beam of the rectangular or elliptical input light WL is arranged to be orthogonal to the line AL, and the projection light PL as shown in FIG. Can be easily formed.

  Specifically, an intensity distribution can be generated in the projection light PL by first shaping the beam shape of the input light WL by the condensing 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. Then, by providing the optical axis OA of the input light WL in 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, distance visibility becomes large. Even when the shade SH is moved into the light path of the condensed light FL (that is, even when a low beam is formed), a similar irradiation intensity distribution can be generated. In this way, using the lamp 10 makes it possible to simplify complicated optical design.

  In the case where laser light emitting blue light is converted to yellow light by a phosphor to obtain white light, light distribution design is not easy even if the lamp is configured as described above. Specifically, for example, blue light by a laser having high linearity and yellow light by a phosphor whose emission pattern has a Lambertian distribution have different intensity distributions as diffusely reflected light. Therefore, while being diffused, biased regions of the blue component and the yellow component are formed. For example, if a portion where a portion of blue light intensity is higher than yellow light is projected while including it, the irradiated area corresponding to that portion is recognized as light (blue light) having a blue component more than the peripheral portion. When white light is obtained by mixing the fluorescence of the blue phosphor, the yellow phosphor, and the red phosphor with an ultraviolet laser as excitation light, the emission pattern of the light has a Lambertian distribution. Therefore, the lamp configuration described above can obtain a great effect by combining it with the coherent input light WL having a broad spectrum.

  In the present embodiment, as shown in FIGS. 4A and 4B, the emission end portion 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 the direction perpendicular to the light receiving surface 31S as long as the optical axis OA is provided in the surface AS. Moreover, the optical axis OA of the input light WL does not necessarily have to be provided in the surface AS.

  FIG. 6 is a view showing the 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 unit SU are not shown. The lamp 10A has the same configuration as the lamp 10 except for the configuration of the lamp portion 30A. As shown in FIG. 6, in the present modification, the lamp body portion 30A includes a translucent member BD having transparency to the input light WL, and a reflective diffusion member 31A fixed to the translucent member BD. , A focusing mirror 32A and a projection lens 33A. The translucent member BD is provided to fill a space including the optical path of the input light WL, the diffused light DL, and the condensed light FL.

  In addition, 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 collected light FL. That is, as the moving mechanism MV rotates, the shade moves to a position outside the optical path of the collected light FL (a position shown by a broken line in FIG. 6). Therefore, by moving the position of the shade SH, both high beam and flow beam can be formed. In addition, although the case where the movement mechanism MV and the shade SH rotationally move was demonstrated here, the movement mechanism MV and the shade SH may be comprised so that not only rotational movement but linear movement may be performed.

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

  In this modification, a translucent member BD is provided which fills a space including the optical paths of the input light WL, the diffused light DL, and the condensed light FL. Therefore, the diffused light DL and the collected light FL are generated in the translucent member BD. In addition, the input light WL, the diffused light DL, and the collected light FL are projected as the projection light PL after traveling in the translucent member BD. In this modification, the incident surface where the input light WL is incident on the translucent member BD can be used (formed) as a condensing lens, and the condensing lens LZ2 of the emission end portion LP (FIG. 3A) Can be omitted.

  In the above, the case of using a supercontinuum light source as the light source 21 has been described, but a light source capable of obtaining a spatially or temporally coherent broadband spectrum without using a phosphor is referred to as a supercontinium light source. It can be used instead. For example, it is possible to obtain white light by superposing respective lights with a laser that emits red light, green light and blue light as light sources. That is, the light source 21 may have a laser device LSR formed of a plurality of lasers having different emission colors. In this case, the non-linear material NLM need not be provided. Also, other devices for generating supercontinuum light may be used instead of the laser device LSR and the nonlinear material NLM.

  Further, the configurations of the light source unit 20 and the lamp unit 30 (30A) are merely an example. In addition, the shade SH does not have to be necessarily provided. The output unit 22 may not have the ultraviolet and infrared component removing units 22A and 22B. Moreover, the heat dissipation unit 23 may not be provided.

DESCRIPTION OF SYMBOLS 10, 10A Lamp 20 Light source part 21 Light source 30 Light body part 31 Diffuse reflection member 31S Light receiving surface 32 Focusing mirror 33 Projection lens F1 1st focus F2 2nd focus WL Input light DL Diffused light FL Condensed light PL Projection light LP output end OA Optical axis AS plane of input light

Claims (9)

A light source producing supercontinuum light having a spectral width spanning the entire visible range ;
A multimode optical fiber for guiding the supercontinuum light;
A diffuse reflection member that diffuses and reflects the supercontinium light emitted from the emission end of the multimode optical fiber to generate diffused light;
A condensing mirror that condenses the diffused light to generate condensed light;
And a projection lens for projecting the condensed light to generate projection light. At the exit end of the supercontinuum light in the multimode optical fiber, a condenser lens for shaping the beam shape of the supercontinuum light into a rectangle or an ellipse and entering the diffuse reflection member is provided lamp of claim 1, characterized in that there. The lamp according to claim 2 , wherein the multimode optical fiber has a rectangular core shape. The diffuse reflection member receives the supercontinuum light at a first focal point of the focusing mirror to generate the diffused light.
The focusing mirror focuses the diffused light on a second focal point of the focusing mirror,
An optical axis of the supercontinuum light claims, characterized in that provided in a plane perpendicular to the light receiving surface of the supercontinuum light in the first and second focus and through the diffuse reflection member The lamp according to any one of Items 1 to 3 . 5. The lamp according to claim 4 , wherein the optical axis of the supercontinuum light is inclined toward the projection lens with respect to a perpendicular to the light receiving surface passing through the first focal point. And ultraviolet component removing unit which removes ultraviolet components in the supercontinuum light, any one of claims 1 to 5, characterized in that it has a infrared component removing unit which removes infrared component in the supercontinuum light The lamp described in one. A shade configured to partially reflect the collected light towards the projection lens;
The supercontinuum light, according to any one of claims 1 to 6, wherein Rukoto to have a, and the translucent member for filling a space including the optical path of the diffused light and the condensing light Lights. A light source producing supercontinuum light having a spectral width spanning the entire visible range;
  A diffuse reflection member that diffuses and reflects the supercontinuum light to generate diffused light;
  A condensing mirror that condenses the diffused light to generate condensed light and has first and second focal points;
  And a projection lens that projects the condensed light to generate projection light.
  The diffuse reflector receives the supercontinuum light at the first focal point to generate the diffuse light,
  The condensing mirror condenses the diffused light to the second focal point,
  The optical axis of the supercontinuum light is provided in a plane perpendicular to the light reception surface of the supercontinuum light in the diffuse reflection member and passing through the first and second focal points.
  The diffusive reflection member may be configured to have the supercontinuum such that the diffusive light has an asymmetric intensity distribution with respect to the first focal point and has an area in the in-plane area that is higher in intensity than other areas. A lamp characterized in that it diffuses and reflects aluminum light. A shade configured to partially reflect the collected light towards the projection lens;
  The lamp according to any one of claims 1 to 6, further comprising: a translucent member filling a space including the optical path of the supercontinuum light, the diffused light, and the collected light.

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