JP2008117733A - Light source device, and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device and a projector capable of achieving life prolongation. <P>SOLUTION: The light source device 10 includes a light source lamp 11 having an arc tube to have a discharge space and a pair of electrodes arranged in the discharge space of the arc tube, the main reflecting mirror 12 cross-sectionally extending in an approximately concave-shape, reflecting luminous flux in the visible region included in the luminous flux emitted from the light source lamp 11, and transmitting the luminous flux in the infrared region, and a sub-reflecting mirror 13 having a reflecting film 132A to be arranged opposite to a reflecting face 122A of the main reflecting mirror 12 and to reflect part of the luminous flux emitted from the light source lamp 11 toward the discharge space. The reflecting film 132A is constituted of a material to reflect the luminous flux in the visible region and the luminous flux R22 in the infrared region included in the luminous flux radiated from the light source lamp 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light source device and a projector.

2. Description of the Related Art Conventionally, projectors that modulate a light beam emitted from a light source according to image information and project an enlarged optical image have been used.
As a light source device for such a projector, a discharge-type light source lamp such as a metal halide lamp or a high-pressure mercury lamp, a reflector that reflects a light beam emitted from the light source lamp, and a lamp housing that houses the light source lamp and the reflector inside (See, for example, Patent Document 1).

JP 2005-148293 A

  By the way, in the light source device described in Patent Document 1, the light beam directed toward the reflector among the light beams emitted from the light source lamp is reflected by the reflector and becomes use light that can be irradiated to the illumination target. Further, of the light beams emitted from the light source lamp, the light beam deviated from the reflector (the light beam emitted to the side opposite to the reflector) becomes unused light that cannot be irradiated to the illumination target. The unused light is irradiated onto the lamp housing, absorbed by the inner wall of the lamp housing, and converted into heat. For this reason, the temperature inside the light source device rises, and it becomes difficult to cool the light source device, and there is a problem that the life of the light source device cannot be extended.

  An object of the present invention is to provide a light source device and a projector that can extend the life.

The light source device of the present invention reflects a luminous bulb having a discharge space, a light source lamp having a pair of electrodes disposed in the discharge space of the luminous tube, and a light beam radiated from the light source lamp, spreading in a substantially concave shape. A light source device including a reflector, wherein the reflector is configured to reflect a light beam in a visible region included in a light beam emitted from the light source lamp and transmit a light beam in an infrared region, and the reflector And a sub-reflecting mirror having a reflecting member that reflects a part of the light beam emitted from the light source lamp toward the discharge space, and the reflecting member is emitted from the light source lamp. It is made of a material that reflects a visible region light beam and an infrared region light beam included in the light beam.
Here, as the reflector, either a parabolic reflector or an elliptical reflector may be adopted. The reflector may be configured to reflect the light beam in the visible region and transmit the light beam in the infrared region. For example, a cold mirror can be exemplified.

In the present invention, the light source device includes a sub-reflecting mirror having a reflecting member that reflects a light beam in the visible region (hereinafter, visible light) and a light beam in the infrared region (hereinafter, infrared). As a result, the visible light contained in the light beam radiated from the light source lamp to the side opposite to the reflector can be reflected toward the discharge space by the sub-reflecting mirror and reflected again by the reflector. For this reason, the utilization efficiency of the light inject | emitted from a light source lamp can be improved.
The reflector is configured to transmit infrared rays, and the sub-reflecting mirror is configured to reflect not only visible light but also infrared rays. As a result, the infrared rays contained in the light beam radiated from the light source lamp to the opposite side of the reflector are reflected by the sub-reflector toward the discharge space and transmitted through the reflector to be discharged from the light emission rear side of the reflector to the outside. it can. For this reason, unlike in the past, unused light (infrared rays) is not absorbed by the inner wall of the lamp housing or the like and converted into heat, the temperature inside the light source device can be kept low, and the lamp housing is deteriorated. In addition, the deterioration of the light source lamp can be suppressed and the life of the light source device can be extended.

In the light source device according to the aspect of the invention, the arc tube includes a light emitting portion that performs discharge light emission between the pair of electrodes, and sealing portions provided at both ends of the light emitting portion, and the sub-reflecting mirror includes the light emitting device. Preferably, the reflective member is provided on the outer surface of the hook-like shape spaced apart from the light-emitting part of the sub-reflecting mirror.
By the way, in the sub-reflecting mirror, the reflecting member absorbs a part of the light beam and converts it into heat when reflecting the light beam emitted from the light source lamp. For this reason, in order to keep the temperature inside the light source device low, the reflecting member needs to be cooled. Here, for example, in the sub-reflecting mirror, when the reflecting member is provided on the inner surface of the bowl shape (the surface on the side close to the light emitting unit), the cooling air is blown from the outside of the sub-reflecting mirror. Is difficult to blow to the reflecting member located in the gap between the sub-reflecting mirror and the light emitting unit, that is, it is difficult to cool the reflecting member.
In the present invention, in the sub-reflecting mirror, the reflecting member is provided on the outer surface of the bowl shape (the surface on the side away from the light emitting portion). Thus, if cooling air is blown from the outside of the sub-reflecting mirror, the cooling air can be blown to the reflecting member, and the reflecting member can be cooled to keep the temperature inside the light source device low. Further, the life of the light source device can be extended by suppressing the deterioration of the reflecting member.

In the light source device of the present invention, the light transmitting device is provided on the light emission front side of the reflector and transmits a light beam, and is connected to the light emission front side end portion of the reflector and the outer peripheral end portion of the light transmission member. And a support member that integrates the reflector and the translucent member, and the support member has a cylindrical shape, and an opening portion on one end side of the cylindrical shape is connected to a light emission front side end portion of the reflector. Moreover, it is preferable that the opening part of the cylindrical other end side is connected to the outer peripheral end part of the translucent member.
According to the present invention, since the light source device includes the support member, the unit in which the light source lamp and the reflector are integrated and the translucent member can be integrated, and the light source is supplied to the optical device on which the light source device is mounted. The layout incorporating the device is facilitated.
In addition, as described above, the infrared rays contained in the light beam emitted from the light source lamp to the side opposite to the reflector are discharged to the outside from the light emission rear side of the reflector by the sub-reflector and the reflector, so that the infrared rays are transmitted to the support member. Irradiation can be avoided. That is, since the deterioration of the support member due to infrared irradiation can be suppressed, the support member can be made of a material that is not so heat-resistant, and the degree of freedom in designing the support member can be improved and the cost of the light source device can be reduced. .
Further, as described above, the infrared rays contained in the light beam emitted from the light source lamp to the side opposite to the reflector are discharged from the light emission rear side of the reflector to the outside by the sub-reflector and the reflector, so that the support member has a cylindrical shape. The light emission front end of the reflector is connected to the opening at one end of the cylindrical shape, and the outer peripheral end of the translucent member is connected to the opening at the other end of the cylindrical shape, between the reflector and the translucent member. Even when the space is made into a substantially sealed space by the support member, the temperature inside the light source device can be kept low. And even if it is a case where a light source lamp bursts by making the space between a reflector and a translucent member into a substantially sealed space with a support member, it can suppress that a fragment | piece is scattered outside the light source device.

In the light source device of the present invention, it is preferable that the light source device includes a light shielding member that is disposed on a light emission rear side of the reflector and shields a light beam in an infrared region that has passed through the reflector.
By the way, since the infrared rays contained in the light beam emitted from the light source lamp to the side opposite to the reflector are discharged to the outside from the light emission rear side of the reflector by the sub-reflector and the reflector, the optical device on which the light source device is mounted is used. It irradiates other members (exterior housing etc.) which constitute. Similarly, infrared rays contained in the light flux emitted from the light source lamp to the reflector side are transmitted through the reflector and discharged to the outside from the light emission rear side of the reflector, so that the exterior casing and the like are irradiated. And when infrared rays are irradiated to an exterior housing etc., it will be absorbed in an exterior housing etc. and will be converted into heat, and there exists a possibility that degradation of an exterior housing etc. may arise.
According to the present invention, since the light source device includes the light shielding member, the infrared light emitted from the light emission rear side of the reflector can be shielded by the light shielding member. For this reason, infrared rays are not discharged to the outside of the light source device, it is possible to avoid irradiating infrared rays to other members constituting the optical apparatus on which the light source device is mounted, and to prevent deterioration of the other members. .

In the light source device of the present invention, it is preferable that the light shielding member is made of a material that absorbs a light beam in an infrared region.
According to the present invention, since the light shielding member is made of a material that absorbs the light flux in the infrared region, the infrared light emitted from the light emission rear side of the reflector can be absorbed by the light shielding member and converted into heat, It is possible to suitably achieve the effect that it is possible to avoid irradiation of infrared rays to other members constituting the optical apparatus on which the light source device described above is mounted, and to prevent the deterioration of the other members.

In the light source device of the present invention, the light shielding member is configured to reflect the light beam in the infrared region, and is subjected to uneven processing for irregularly reflecting the light beam on the irradiation surface irradiated with the light beam in the infrared region. It is preferable.
According to the present invention, since the light shielding member is configured to reflect the light flux in the infrared region, the infrared light emitted from the light emission rear side of the reflector can be reflected by the light shielding member. It is possible to suitably achieve the effect that it is possible to avoid irradiation of infrared rays to other members constituting the mounted optical apparatus and to prevent the deterioration of the other members.
In addition, since the irradiating surface of the light shielding member has been processed to be uneven, it is possible to diffusely reflect the infrared light irradiated to the irradiating surface by the uneven irradiating surface and reduce the unevenness of the intensity distribution of the reflected light (infrared rays). it can. For this reason, even when the infrared rays reflected by the light shielding member are irradiated to other members constituting the light source device, it is possible to prevent the infrared rays having a high intensity from being irradiated to the other members. Deterioration of the member can be suppressed.

A projector according to the present invention includes a light source device, a light modulation device that modulates a light beam emitted from the light source device according to image information, and a projection optical device that enlarges and projects the light beam modulated by the light modulation device. The light source device is a light source device as described above.
According to the present invention, since the projector includes the light source device described above, the projector can enjoy the same operations and effects as the light source device described above.
In addition, since the projector includes a light source device that can maintain the internal temperature low, the cooling fan that cools the light source device by blowing cooling air to the light source device or sucking air in the vicinity of the light source device is used. It is not necessary to make it so high, and the quietness of the projector can be secured.

[First embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
[Configuration of projector]
FIG. 1 is a plan view showing a schematic configuration of a projector 1 in the first embodiment.
The projector 1 is an optical device that modulates a light beam emitted from a light source according to image information to form image light, and enlarges and projects the image light on a projection surface such as a screen. As shown in FIG. 1, the projector 1 is roughly composed of a substantially rectangular parallelepiped outer casing 2 and an optical unit 3 housed in the outer casing 2.
Although not shown in the drawings, in the exterior housing 2, in addition to the optical unit 3, a power supply unit that supplies external power to the constituent members of the projector 1, a cooling unit that cools the interior of the projector 1, and a projector It is assumed that a control device or the like for controlling the whole 1 is arranged.

The exterior housing 2 is a synthetic resin product by injection molding or the like, and configures the upper case, the front surface, the back surface, and the side surface of the projector 1, and the bottom surface, the front surface, the back surface, and the side surface of the projector 1, respectively. It consists of a lower case. Each case is fixed to each other with a screw or the like.
The exterior casing 2 is not limited to being made of synthetic resin, but may be formed of other materials, for example, metal.

  The optical unit 3 is disposed inside the exterior housing 2 and forms an image light to be enlarged and projected. As shown in FIG. 1, the optical unit 3 includes a light source device 10, a uniform illumination optical system 20, a color separation optical system 30, a relay optical system 35, an optical device 40, and a projection optical system 50 as a projection optical device. The optical elements and the optical device 40 constituting the optical systems 20 to 35 are positioned and adjusted and accommodated in an optical component casing 60 in which a predetermined illumination optical axis A is set.

The light source device 10 illuminates the optical device 40 by emitting light beams emitted from the light source lamp 11 in a certain direction. As will be described later in detail, the light source device 10 holds a light source lamp 11, a main reflecting mirror 12 as a reflector, a sub-reflecting mirror 13, a collimating lens 14 as a translucent member, as shown in FIG. The support member 15 (see FIGS. 2 and 3) and the light shielding member 16 (see FIG. 2) are configured. The light source device 10 is housed and disposed in an outer housing 10C (FIG. 1) connected to the optical component casing 60. The light source device 10 is housed and arranged in the outer housing 10C, so that a predetermined position with respect to the optical component housing 60 (the central axis of the light beam emitted from the light source device 10 and the illumination set in the optical component housing 60). Position at which the optical axis A coincides).
Then, the light beam emitted from the light source lamp 11 is emitted as focused light by the main reflecting mirror 12 with the emission direction aligned to the front side of the light source device 10, collimated by the parallelizing lens 14, and applied to the uniform illumination optical system 20. It is injected.
FIG. 1 shows a case where the main reflecting mirror 12 is configured as an ellipsoidal reflector, and the collimating lens 14 is omitted when the main reflecting mirror 12 is configured as a parabolic reflector.

The uniform illumination optical system 20 is an optical system that divides the light beam emitted from the light source device 10 into a plurality of partial light beams and uniformizes the in-plane illuminance of the illumination area. The uniform illumination optical system 20 includes a first lens array 21, a second lens array 22, a polarization conversion element 23, and a superimposing lens 24.
The first lens array 21 has a function as a light beam splitting optical element that splits a light beam emitted from the light source device 10 into a plurality of partial light beams, and is arranged in a matrix in a plane orthogonal to the illumination optical axis A. A plurality of small lenses are provided.
The second lens array 22 is an optical element that condenses a plurality of partial light beams divided by the first lens array 21 described above, and is matrixed in a plane orthogonal to the illumination optical axis A, like the first lens array 21. It has the structure provided with the several small lens arranged in a shape.

The polarization conversion element 23 is a polarization conversion element that aligns the polarization direction of each partial light beam divided by the first lens array 21 with linear polarization in substantially one direction.
Although not shown, the polarization conversion element 23 has a configuration in which polarization separation films and reflection films that are inclined with respect to the illumination optical axis A are alternately arranged. The polarization separation film transmits one polarized light beam among the P-polarized light beam and S-polarized light beam included in each partial light beam, and reflects the other polarized light beam. The other polarized light beam reflected is bent by the reflection film and emitted in the emission direction of one polarized light beam, that is, the direction along the illumination optical axis A. Any of the emitted polarized light beams is polarized and converted by a phase difference plate provided on the light beam exit surface of the polarization conversion element 23, and the polarization directions of almost all the polarized light beams are aligned. By using such a polarization conversion element 23, it is possible to align the light beam emitted from the light source lamp 11 with a polarized light beam in substantially one direction, so that the utilization factor of the light source light used in the optical device 40 is improved. Can do.

  The superimposing lens 24 condenses a plurality of partial light beams that have passed through the first lens array 21, the second lens array 22, and the polarization conversion element 23, and superimposes them on image forming regions of three liquid crystal panels (to be described later) of the optical device 40. This is an optical element.

The color separation optical system 30 includes two dichroic mirrors 31 and 32 and a reflection mirror 33, and a plurality of partial light beams emitted from the uniform illumination optical system 20 by the dichroic mirrors 31 and 32 are converted into red (R), It has a function of separating light of three colors, green (G) and blue (B).
The dichroic mirrors 31 and 32 are optical elements in which a wavelength selection film that reflects a light beam in a predetermined wavelength region and transmits a light beam in another wavelength region is formed on a substrate. The dichroic mirror 31 disposed in the front stage of the optical path is a mirror that reflects blue light and transmits other color light. Further, the dichroic mirror 32 disposed at the rear stage of the optical path is a mirror that reflects green light and transmits red light.

  The relay optical system 35 includes an incident side lens 36, a relay lens 38, and reflection mirrors 37 and 39, and guides red light transmitted through the dichroic mirrors 31 and 32 constituting the color separation optical system 30 to the optical device 40. It has a function. The reason why such a relay optical system 35 is provided in the optical path of the red light is that the length of the optical path of the red light is longer than the length of the optical path of the other color light, and thus the use of light due to light divergence or the like. This is to prevent a decrease in efficiency. In this embodiment, the length of the optical path of red light is long, and thus such a configuration is used. However, a configuration in which the length of the optical path of blue light is increased and the relay optical system 35 is used for the optical path of blue light is also considered. It is done.

  The blue light separated by the dichroic mirror 31 described above is bent by the reflection mirror 33 and then supplied to the optical device 40 via the field lens 41. Further, the green light separated by the dichroic mirror 32 is supplied to the optical device 40 through the field lens 41 as it is. Further, the red light is condensed and bent by the lenses 36 and 38 and the reflection mirrors 37 and 39 constituting the relay optical system 35 and supplied to the optical device 40 via the field lens 41. In addition, the field lens 41 provided in the optical path upstream of each color light of the optical device 40 converts each partial light beam emitted from the second lens array 22 into a light beam parallel to the principal ray of each partial light beam. Is provided.

  The optical device 40 modulates an incident light beam according to image information to form a color image. The optical device 40 includes liquid crystal panels 42R, 42G, and 42B as light modulation devices to be illuminated (a liquid crystal panel on the red light side is 42R, a liquid crystal panel on the green light side is 42G, and a liquid crystal panel on the blue light side is 42B. And a cross dichroic prism 43. An incident-side polarizing plate 44 is interposed between the field lens 41 and the liquid crystal panels 42R, 42G, and 42B, and an exit-side polarized light is interposed between the liquid crystal panels 42R, 42G, and 42B and the cross dichroic prism 43. A plate 45 is interposed, and the incident-side polarizing plate 44, the liquid crystal panels 42R, 42G, and 42B, and the exit-side polarizing plate 45 modulate the light of each color light incident thereon.

The liquid crystal panels 42R, 42G, and 42B are obtained by hermetically enclosing a liquid crystal as an electro-optical material in a pair of transparent glass substrates. For example, a given image signal using a polysilicon TFT (Thin Film Transistor) as a switching element. Accordingly, the polarization direction of the polarized light beam emitted from the incident side polarizing plate 44 is modulated.
The cross dichroic prism 43 is an optical element that synthesizes an optical image modulated for each color light emitted from the emission side polarizing plate 45 to form a color image. The cross dichroic prism 43 has a substantially square shape in plan view in which four right angle prisms are bonded together, and a dielectric multilayer film is formed on the interface where the right angle prisms are bonded together. One of the substantially X-shaped dielectric multilayer films reflects red light, and the other dielectric multilayer film reflects blue light. These dielectric multilayer films cause red light and blue light to be reflected. The light is bent and aligned with the traveling direction of the green light, so that the three color lights are synthesized.
The color image emitted from the cross dichroic prism 43 is enlarged and projected by the projection optical system 50 to form a large screen image on a screen (not shown).

[Configuration of light source device]
2 and 3 are diagrams showing a schematic configuration of the light source device 10. Specifically, FIG. 2 is a perspective view of the light source device 10 as viewed from the light emission front side. FIG. 3 is an exploded perspective view of the light source device 10 as viewed from the light emission front side.
As shown in FIG. 2 or 3, the light source device 10 includes a light source device body 10A, a collimating lens 14, a support member 15, and a light shielding member 16 (FIG. 2).

FIG. 4 is a cross-sectional view illustrating a schematic configuration of the light source device main body 10A.
As shown in FIGS. 2 to 4, the light source device main body 10 </ b> A has a configuration in which a light source lamp 11, a main reflecting mirror 12, and a sub-reflecting mirror 13 are integrated.
As shown in FIG. 4, the light source lamp 11 includes an arc tube 111 made of a quartz glass tube, a pair of electrodes 112 disposed in the arc tube 111, and an enclosure (not shown).
Here, as the light source lamp 11, various light source lamps that emit light with high luminance can be adopted, and for example, a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be adopted.

The arc tube 111 includes a light emitting part 1111 that is located at the center and swells in a substantially spherical shape, and a pair of sealing parts 1112 and 1113 extending on both sides of the light emitting part 1111.
A substantially spherical discharge space is formed in the light emitting portion 1111, and a pair of electrodes 112, mercury, a rare gas, and a small amount of halogen are enclosed in the discharge space.
A molybdenum metal foil 112A electrically connected to the pair of electrodes 112 is inserted into the pair of sealing portions 1112 and 1113 and sealed with a glass material or the like. Each metal foil 112 </ b> A is further connected to a lead wire 113 as an electrode lead wire, and the lead wire 113 extends to the outside of the light source lamp 11.
When a voltage is applied to the lead wire 113, as shown in FIG. 4, a potential difference is generated between the electrodes 112 via the metal foil 112A, a discharge is generated, an arc image D is generated, and the inside of the light emitting unit 1111 emits light. . In the following description, the light emission center is described as the center position O of the arc image D generated between the electrodes 112. In addition, the center position O of the arc image D is located approximately at the center between the pair of electrodes 112. Furthermore, the center position O of the arc image D is the center axis of the arc tube 111 (coincided with the illumination optical axis A in FIG. 4) along the extending direction of the sealing portions 1112 and 1113, and the light emitting portion 1111 bulges most. It is assumed that it substantially coincides with the intersection (the center of the arc tube 111) with the cross section along the plane orthogonal to the illumination optical axis A of the portion that is present.

As shown in FIG. 4, the main reflecting mirror 12 includes a cylindrical neck portion 121 through which one sealing portion 1112 on the proximal end side of the light source lamp 11 is inserted, and a concave curved surface shape that extends from the neck portion 121. This is an integrally molded product made of glass having translucency and provided with a reflective portion 122.
As shown in FIG. 4, an insertion hole 123 is formed in the center of the neck 121 so as to be substantially cylindrical, and a sealing portion 1112 is disposed at the center of the insertion hole 123. .
The reflection unit 122 includes a reflection surface 122A configured by vapor-depositing a metal thin film on a glass surface having a rotational curve shape. The reflecting surface 122A is a cold mirror that reflects visible light and transmits infrared rays and ultraviolet rays.

In such a light source lamp 11 disposed inside the reflecting portion 122 of the main reflecting mirror 12, the center position O of the arc image D is in the vicinity of the first focal position F1 of the rotational curve shape of the reflecting surface 122A of the reflecting portion 122. Are arranged as follows.
When the light source lamp 11 is turned on, as shown in FIG. 4, among the light beams emitted from the light emitting unit 1111, the light beam R <b> 1 toward the main reflecting mirror 12 is reflected on the reflecting surface 122 </ b> A of the reflecting unit 122 of the main reflecting mirror 12. The reflected light is reflected to be focused at the second focal position F2 having a rotational curve shape.
Further, as shown in FIG. 3, the light emission front side end portion of the reflection portion 122 extends outward substantially orthogonal to the central axis of the arc tube 111 (matches the illumination optical axis A in FIG. 4). It has a rectangular frame shape.

FIG. 5 is a cross-sectional view showing a schematic configuration of the sub-reflecting mirror 13.
As shown in FIG. 4 or 5, the sub-reflecting mirror 13 includes a substantially cylindrical neck 131 into which the other sealing portion 1113 constituting the arc tube 111 of the light source lamp 11 is inserted, and the neck A substantially spherical reflecting portion 132 extending from 131 is provided, and the neck portion 131 and the reflecting portion 132 are integrally formed.
The neck portion 131 is a portion for fixing the sub-reflecting mirror 13 to the light source lamp 11. By inserting the sealing portion 1113 of the light source lamp 11 into the cylindrical insertion hole 131A, as shown in FIG. A sub-reflecting mirror 13 is installed for the light source lamp 11. The inner peripheral surface of the insertion hole 131A is an adhesive surface filled with an adhesive for fixing to the sealing portion 1113. Thus, by providing the neck portion 131 in the sub-reflecting mirror 13, the fixing region of the sub-reflecting mirror 13 with respect to the light source lamp 11 can be increased as compared with the configuration in which the neck portion 131 is not provided. The adhering state of the sub-reflecting mirror 13 to the lamp 11 can be maintained satisfactorily.

As shown in FIG. 4 or FIG. 5, the reflecting unit 132 follows the spherical surface of the light emitting unit 1111 of the light source lamp 11 in a state where the sub-reflecting mirror 13 is installed with respect to the light source lamp 11, It is configured in a bowl shape that covers approximately half of the side.
As shown in FIG. 5, in the reflecting portion 132, a light beam in the visible region (hereinafter referred to as visible light) and a light beam in the infrared region (hereinafter referred to as “visible light”) are formed on the inner surface of the bowl shape (the surface on the side close to the light emitting portion 1111). A reflective film 132A is formed as a reflective member made of a material that reflects the infrared rays.
In this embodiment, the reflective film 132A is formed of a multilayer film in which SiO ₂ that is a low refractive index material and TaO ₅ that is a high refractive index material are stacked. Then, by configuring the reflective film 132A with the above-described multilayer film, a light beam in a wavelength region of about 380 nm to 1000 nm is reflected and a light beam in an ultraviolet region (hereinafter referred to as ultraviolet light) is transmitted.
The above-described sub-reflecting mirror 13 (a portion excluding the reflecting film 132A) is made of an inorganic material such as quartz or alumina ceramic, which is a low thermal expansion material and / or a high thermal conductivity material.

  Then, by attaching the above-described sub-reflecting mirror 13 to the arc tube 111, as shown in FIG. 4, out of the light flux R2 radiated from the light emitting unit 1111 to the opposite side (front side) from the main reflecting mirror 12, The visible light R <b> 21 is reflected by the reflective film 132 </ b> A of the sub-reflecting mirror 13 and travels toward the main reflecting mirror 12 through the light emitting unit 1111. The visible light R21 toward the main reflecting mirror 12 is reflected by the reflecting surface 122A, and is focused on the second focal position F2 in the same manner as the light beam R1 directly incident on the reflecting surface 122A from the light source lamp 11.

FIG. 6 is a cross-sectional view of the light source device 10 as viewed from above.
As shown in FIG. 2, FIG. 3, or FIG. 6, the support member 15 is a member that integrates the light source device main body 10 </ b> A and the collimating lens 14. More specifically, as shown in FIG. 2, FIG. 3, or FIG. 6, the support member 15 has a cylindrical shape whose inner diameter is reduced toward the light emission front side, The opening 151 is connected to the light emitting front end of the main reflecting mirror 12 constituting the light source device main body 10 </ b> A, and the opening 152 on the other end of the cylindrical shape is connected to the outer peripheral end of the parallelizing lens 14.
Here, the opening portion 151 has a substantially rectangular shape in plan view, and is configured to be able to fit the light emission front side end portion of the main reflecting mirror 12. That is, the support member 15 and the main reflecting mirror 12 are connected by fitting the light emission front side end portion of the main reflecting mirror 12 into the opening portion 151.
Moreover, the opening part 152 has a circular shape in plan view, and is configured to be able to fit the collimating lens 14. That is, the support member 15 and the collimating lens 14 are connected by fitting the collimating lens 14 into the opening 152.
As described above, after the main reflecting mirror 12 and the collimating lens 14 are fitted to the respective opening portions 151 and 152, for example, they may be bonded and fixed with a fixing adhesive or the like.

In addition, as shown in FIG. 2, FIG. 3, or FIG. 6, the support member 15 is opposed to the left and right direction (horizontal direction substantially orthogonal to the extending direction of the arc tube 111). Openings 153 and 154 having a rectangular shape in plan view that allow air to flow therethrough are formed.
Then, by a cooling fan (for example, an exhaust fan) constituting the cooling unit disposed in the vicinity of the opening 153, as shown in FIG. 6, cooling air outside the support member 15 is passed through the openings 153 and 154. Is inhaled and introduced into the support member 15. By introducing the cooling air into the support member 15, the cooling air is blown to the light source lamp 11 of the light source device main body 10A to be cooled. Further, the air inside the support member 15 is sucked by the exhaust fan through the opening 153 and exhausted to the outside of the projector 1.

As shown in FIG. 2 or FIG. 6, the light shielding member 16 is a member that is disposed on the light emission rear side of the light source device main body 10 </ b> A (main reflection mirror 12) and shields infrared rays. It is formed in a box shape that covers the rear side. And the light shielding member 16 is comprised with the material which absorbs infrared rays and converts it into heat. As a material of the light shielding member 16, for example, a member such as ceramics or aluminum subjected to an alumite treatment can be employed. The material of the light shielding member 16 may be made of any material as long as it can shield infrared rays in addition to a member such as ceramics or anodized aluminum.
That is, as shown in FIG. 6, among the light flux R2 radiated from the light emitting unit 1111 to the side opposite to the main reflecting mirror 12 (front side), the infrared ray R22 is reflected by the reflecting film 132A of the sub-reflecting mirror 13. To the main reflecting mirror 12 via the light emitting part 1111. The infrared ray R <b> 22 toward the main reflecting mirror 12 passes through the main reflecting mirror 12 and is irradiated to the light shielding member 16. The infrared ray R22 applied to the light shielding member 16 is absorbed by the light shielding member 16 and converted into heat. Similarly, the infrared rays contained in the light beam radiated from the light emitting unit 1111 to the main reflecting mirror 12 side are also transmitted through the main reflecting mirror 12, irradiated to the light shielding member 16, absorbed by the light shielding member 16, and converted into heat. Is done.

  Further, in the light shielding member 16, an opening 161 having a rectangular shape in plan view that allows air to flow inside and outside the light shielding member 16 is formed on the side surface on the opening 153 side as shown in FIG. 6. In addition, as shown in FIG. 6, the opening 161 has an infrared ray (an infrared ray R <b> 22 radiated from the light emitting portion 1111 to the opposite side of the main reflecting mirror 12, reflected by the sub-reflecting mirror 13, and transmitted through the main reflecting mirror 12. In addition, a plurality of light shielding plates 161A are provided to prevent leakage of infrared rays radiated from the light emitting unit 1111 to the main reflecting mirror 12 side and transmitted through the main reflecting mirror 12 to the outside of the light shielding member 16 through the opening 161. . As shown in FIG. 6, these light shielding plates 161 </ b> A have a plate shape and are provided in a state of being inclined with respect to the opening surface of the opening 161 so that the plate surface faces the light emitting unit 1111. That is, the infrared rays toward the opening 161 are shielded (absorbed) by the plurality of light shielding plates 161 </ b> A, and do not leak to the outside of the light shielding member 16 through the opening 161.

  Then, as shown in FIG. 6, cooling air outside the light source device 10 is sucked by the exhaust fan through the opening 161, and the main reflecting mirror 12 is formed from the gap between the light source device main body 10 </ b> A and the light shielding member 16. The light is introduced into a space surrounded by the light emission rear side and the light shielding member 16. By introducing the cooling air into the space, the cooling air is blown to the inner surface of the light shielding member 16 to be cooled. Further, the air in the space is sucked by the exhaust fan through the opening 161 and exhausted to the outside of the projector 1.

The first embodiment described above has the following effects.
In the present embodiment, the light source device 10 includes a sub-reflecting mirror 13 having a reflective film 132A that reflects visible light and infrared light. As a result, the visible light R21 contained in the light beam R2 radiated from the light source lamp 11 to the side opposite to the main reflecting mirror 12 is incident on the rear side so that the sub-reflecting mirror 13 enters the reflecting surface 122A of the main reflecting mirror 12. It can be reflected and reflected again by the main reflecting mirror 12. For this reason, the utilization efficiency of the light inject | emitted from the light source lamp 11 can be improved. Further, the dimension and the aperture diameter of the main reflecting mirror 12 can be reduced as compared with, for example, the case where the sub reflecting mirror 13 is not provided. That is, the light source device 10 and the projector 1 can be reduced in size without reducing the light utilization efficiency, and the layout in which the light source device 10 is incorporated in the projector 1 is facilitated.

The main reflecting mirror 12 is configured to transmit infrared rays, and the sub-reflecting mirror 13 is configured to reflect infrared rays as well as visible light. As a result, the infrared ray R22 included in the light beam R2 radiated from the light source lamp 11 to the side opposite to the main reflecting mirror 12 is reflected backward by the sub-reflecting mirror 13 so as to enter the main reflecting mirror 12, and the main reflection. The light can be emitted to the outside from the light emitting direction side of the main reflecting mirror 12 through the mirror 12. For this reason, infrared rays are not absorbed and converted into heat by the inner wall of the lamp housing (support member 15) as in the prior art, and the temperature inside the light source device 10 can be kept low. The life of the light source device 10 can be extended by suppressing the deterioration and the deterioration of the light source lamp 11.
Furthermore, since the life of the light source device 10 can be extended, it is not necessary to replace the light source lamp 11 and the support member 15 in a short period of time, and industrial waste can be reduced.

Further, since the light source device 10 includes the support member 15, the light source device body 10 </ b> A and the collimating lens 14 can be integrated, and a layout in which the light source device 10 is incorporated into the projector 1 is facilitated.
Further, the infrared ray R22 included in the light beam R2 radiated from the light source lamp 11 to the side opposite to the main reflecting mirror 12 is discharged to the outside from the light emission rear side of the main reflecting mirror 12 by the sub-reflecting mirror 13 and the main reflecting mirror 12. Therefore, it is possible to avoid the infrared ray R22 from being applied to the support member 15. In other words, since the deterioration of the support member 15 due to the irradiation of the infrared ray R22 can be suppressed, the support member 15 can be made of a material having a low heat resistance, and the degree of freedom in designing the support member 15 is improved. The cost can be reduced, and as a result, the cost of the projector 1 can be reduced.

  Furthermore, since the infrared ray R22 is discharged to the outside from the light emission rear side of the main reflecting mirror 12, the support member 15 has a cylindrical shape, and the light emission front side end portion of the main reflecting mirror 12 has an opening portion 151 on one end side of the cylindrical shape. And the outer peripheral end of the collimating lens 14 is connected to the opening 152 on the other end side of the cylindrical shape, and the space between the main reflecting mirror 12 and the collimating lens 14 is made a substantially sealed space by the support member 15. Even in this case, the temperature inside the light source device 10 can be kept low. The space between the main reflecting mirror 12 and the collimating lens 14 is made a substantially sealed space by the support member 15, so that even if the light source lamp 11 is ruptured, the fragments are scattered outside the light source device 10. Can be suppressed.

Further, since the openings 153 and 154 are formed in the support member 15, air can be circulated inside the support member 15 through the openings 153 and 154, and the infrared ray R <b> 22 is transmitted to the main reflecting mirror 12. In addition to the effect of discharging from the rear side of the light emission to the outside, the temperature inside the light source device 10 can be kept lower.
Furthermore, since the temperature inside the light source device 10 can be kept low, the amount of air circulated into the support member 15 through the openings 153 and 154 by the cooling fans (for example, exhaust fans) constituting the cooling unit is reduced. it can. That is, the rotational speed of the exhaust fan can be reduced, and the noise of the projector 1 can be reduced. In addition, the voltage applied to the exhaust fan can be set low, and power saving of the projector 1 can be achieved.

In addition, since the light source device 10 includes the light shielding member 16, infrared light emitted from the light emission rear side of the main reflecting mirror 12 (radiated from the light emitting unit 1111 to the opposite side of the main reflecting mirror 12 and emitted from the sub reflecting mirror 13. Can be shielded by the light shielding member 16. The infrared ray R22 that is reflected by and transmitted through the main reflecting mirror 12 and the infrared ray that is emitted from the light emitting unit 1111 to the main reflecting mirror 12 side and transmitted through the main reflecting mirror 12 can be shielded. For this reason, infrared rays are not discharged outside the light source device 10, and other members (for example, the exterior casing 2, the outer housing 10C, etc.) constituting the projector 1 are prevented from being irradiated with infrared rays. The deterioration of the members can be prevented.
Here, since the light shielding member 16 is made of a material that absorbs infrared light, the infrared light emitted from the light emission rear side of the main reflecting mirror 12 can be absorbed by the light shielding member 16 and converted into heat. The effect that infrared rays are not irradiated to the other members constituting the projector 1 and the deterioration of the other members can be suitably achieved.
Further, since the opening 161 is formed in the light shielding member 16, air can be circulated into and out of the space surrounded by the light emitting rear side of the main reflecting mirror 12 and the light shielding member 16 through the opening 161. In addition, the light shielding member 16 can be efficiently cooled and the temperature inside the light source device 10 can be kept low while avoiding that the light shielding member 16 blocks infrared rays and irradiates the other members.
Further, since the opening 161 is provided with a plurality of light shielding plates 161, the infrared light is prevented from leaking to the outside of the light source device 10 through the opening 161, and the light exit rear side of the main reflecting mirror 12 is shielded from light. Air can be circulated well inside and outside the space surrounded by the member 16.

[Second Embodiment]
Next, 2nd Embodiment of this invention is described based on drawing.
In the following description, the same structure and the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
7 and 8 are diagrams illustrating a schematic configuration of the light source device 100 according to the second embodiment. Specifically, FIG. 7 is a perspective view of the light source device 100 as viewed from the light emission front side. FIG. 8 is an exploded perspective view of the light source device 100 as viewed from the light emission front side.
In the first embodiment, the support member 15 constituting the light source device 10 is formed with two openings 153 and 154 so that air can flow through the openings 153 and 154.
On the other hand, in 2nd Embodiment, as shown in FIG. 7 or FIG. 8, the support member 150 which comprises the light source device 100 is the structure by which each opening part 153,154 was abbreviate | omitted. That is, the inside of the support member 150 is a sealed space because the opening portion 151 on one end side of the cylindrical shape is closed by the light source device main body 10A, and the opening portion 152 on the other end side of the cylindrical shape is closed by the parallelizing lens 14. Yes. The configuration of the support member 150 is the same as that of the first embodiment except that each opening is omitted.

According to the second embodiment described above, even when the inside of the support member 150 is a sealed space, substantially the same effects as those of the first embodiment can be enjoyed. In addition, the following effects are obtained.
As in the configuration described in the first embodiment, when air is introduced into the support member 15 and cooling air is blown to the light source lamp 11, a portion having a locally low temperature occurs in the arc tube 111. There is a fear. Thus, when a relatively large deviation occurs in the temperature distribution of the arc tube 111, blackening or the like is likely to occur on the tube wall of the arc tube 111, and the brightness of the light source device 10 decreases, It will cause a rupture.
In the present embodiment, the inside of the support member 150 is a sealed space, and since cooling air is not blown to the light source lamp 11, a relatively large deviation in the temperature distribution of the arc tube 111 hardly occurs as described above. A decrease in brightness of the light source device 100 and a burst of the arc tube 111 can be suppressed. Further, even when the light source lamp 11 is ruptured, it is possible to further suppress the fragments from being scattered outside the light source device 100 as compared to the first embodiment.

[Third embodiment]
Next, 3rd Embodiment of this invention is described based on drawing.
In the following description, the same structure and the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
FIG. 9 is a cross-sectional view showing a schematic configuration of the sub-reflecting mirror 130 in the third embodiment.
In the first embodiment, in the sub-reflecting mirror 13, the reflecting film 132 </ b> A is formed on the inner surface of the bowl shape in the reflecting portion 132.
On the other hand, in the third embodiment, in the sub-reflecting mirror 130, the reflecting film 132A is formed on the outer surface of the bowl shape in the reflecting portion 132 (the surface on the side away from the light emitting portion 1111) as shown in FIG. ing. Then, the sub-reflecting mirror 130 reflects the light beam R2 (light beam including visible light R21 and infrared light R22) incident on the reflective film 132A via the reflective part 132 by the reflective film 132A, and emits the light emitting part via the reflective part 132. Proceed to 1111. That is, only the formation position of the reflective film 132A is different from that of the first embodiment, and other configurations of the sub-reflecting mirror 130 and configurations other than the sub-reflecting mirror 130 are the same as those of the first embodiment. .

The third embodiment described above has the following effects in addition to the same effects as those of the first embodiment.
In the present embodiment, in the sub-reflecting mirror 130, the reflecting film 132A is provided on the outer surface of the bowl shape (the surface on the side away from the light emitting unit 1111). Accordingly, the sub-reflecting mirror 130 is compared with the configuration of the sub-reflecting mirror 13 in which the reflecting film 132A described in the first embodiment is provided on the inner surface of the bowl shape (the surface on the side close to the light emitting unit 1111). If the cooling air is blown from the outside, the cooling air can be blown to the reflective film 132A, and the reflective film 132A can be cooled to keep the temperature inside the light source device 10 lower. Further, the life of the light source device 10 can be extended by suppressing the deterioration of the reflective film 132A.

[Fourth embodiment]
Next, 4th Embodiment of this invention is described based on drawing.
In the following description, the same structure and the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
FIG. 10 is an enlarged cross-sectional view of the light shielding member 160 in the fourth embodiment.
In the first embodiment, the light shielding member 16 is made of a material that absorbs infrared rays.
On the other hand, in the fourth embodiment, the light shielding member 160 is configured to reflect infrared rays, for example, a metal material such as aluminum, and a material having a high reflectance such as a silver alloy on the irradiation surface 160A irradiated with infrared rays. Or a reflective film identical to the reflective film 132A of the sub-reflecting mirror 13 is formed on the irradiation surface 160A, and as shown in FIG. 10, the incident infrared rays are diffusely reflected on the irradiation surface 160A. The uneven processing is given. In addition, as an uneven | corrugated process, what is called sandblasting etc. which spray a steel grain, sand, and another abrasive grain material at high pressure can be illustrated, for example. That is, only the material of the light shielding member 160 and the shape of the irradiation surface 160A are different from those of the first embodiment. The shape (box shape) of the light shielding member 160 and the configuration other than the light shielding member 160 are the same as those of the first embodiment. It is the same thing.

The fourth embodiment described above has the following effects in addition to the same effects as those of the first embodiment.
In the present embodiment, since the light shielding member 160 is configured to reflect infrared rays, infrared rays emitted from the light emission rear side of the main reflecting mirror 12 (radiated from the light emitting unit 1111 to the opposite side of the main reflecting mirror 12). The infrared ray R22 reflected by the sub-reflecting mirror 13 and transmitted through the main reflecting mirror 12, and the infrared ray radiated from the light emitting unit 1111 to the main reflecting mirror 12 side and transmitted through the main reflecting mirror 12) can be reflected by the light shielding member 160. Irradiation of infrared rays to other members constituting the projector 1 (for example, the outer casing 2 and the outer housing 10C) can be avoided, and deterioration of the other members can be prevented.
Further, since the irradiating surface 160A of the light shielding member 160 is processed to be uneven, the infrared light irradiated to the irradiating surface 160A is irregularly reflected by the uneven irradiating surface 160A, and the intensity distribution of reflected light (infrared rays) is biased. Can be reduced. For this reason, even when the infrared rays reflected by the light shielding member 160 are irradiated to other members (such as the lead wire 113 and the connectors connected to the lead wire 113) constituting the light source device 10, the intensity is high. Irradiation of infrared rays to the other member can be prevented, and deterioration of the other member can be suppressed.

Although the present invention has been described with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the scope of the present invention. It is.
In each of the embodiments, the main reflecting mirror 12 is configured as an ellipsoidal reflector. However, the present invention is not limited thereto, and the main reflecting mirror 12 may be configured as a parabolic reflector that reflects the light beam emitted from the light source lamp 11 as substantially parallel light. . Thus, when the main reflector is configured as a parabolic reflector, for example, if a configuration in which a translucent member such as explosion-proof glass is disposed instead of the collimating lens 14, the same as in each of the above embodiments. Even when the light source lamp 11 is ruptured or the like, it is possible to avoid debris from being scattered outside the light source device 10.

  In each of the above embodiments, the sub-reflecting mirrors 13 and 130 have the reflecting film 132A as the reflecting member. However, the present invention is not limited to this, and the sub-reflecting mirrors 13 and 130 themselves are made of a material that reflects visible light and infrared rays (aluminum Or a metal material such as Further, the film configuration of the reflective film 132A is not limited to the configuration described in each of the above embodiments, and for example, a configuration formed by evaporating a silver alloy or the like may be used. In such a configuration, since ultraviolet rays are also reflected toward the light emitting unit 1111, when considering the cooling efficiency of the light source lamp 11, a configuration that transmits ultraviolet rays like the reflective film 132 </ b> A. It is preferable that

In each of the above embodiments, the shape of the sub-reflecting mirrors 13 and 130, the shape of the support members 15 and 150, and the shape of the light shielding members 16 and 160 are not limited to the shapes described in the above embodiments, and other shapes are employed. It doesn't matter.
The above embodiments may be combined as appropriate. For example, the configuration described in the first embodiment may be configured by applying both the configuration of the sub-reflecting mirror 130 described in the third embodiment and the light shielding member 160 described in the fourth embodiment. Further, for example, the configuration described in the second embodiment may be configured by applying the sub-reflecting mirror 130 described in the third embodiment or the light shielding member 160 described in the fourth embodiment.

In each of the above embodiments, only the example of the projector 1 using the three liquid crystal panels 42R, 42G, and 42B has been described. However, the present invention is a projector using only one liquid crystal panel and a projector using two liquid crystal panels. Alternatively, the invention can be applied to a projector using four or more liquid crystal panels.
In each of the above embodiments, a transmissive liquid crystal panel having a different light incident surface and light emitting surface is used. However, a reflective liquid crystal panel having the same light incident surface and light emitting surface may be used.
In each of the above embodiments, a liquid crystal panel is used as the light modulation device, but a light modulation device other than liquid crystal, such as a device using a micromirror, may be used. In this case, polarizing plates on the light beam incident side and the light beam emission side can be omitted.
In each of the above embodiments, only the example of a front type projector that projects from the direction of observing the screen is given. Applicable.
In each of the above embodiments, the light source device of the present invention is employed in the projector. However, the present invention is not limited to this, and the light source device of the present invention may be employed in other optical devices.

Although the best configuration for carrying out the present invention has been disclosed in the above description, the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

  Since the light source device of the present invention can extend the life, it can be used as a light source device for a projector used in home theater or presentation.

FIG. 2 is a plan view illustrating a schematic configuration of the projector according to the first embodiment. The figure which shows schematic structure of the light source device in the said embodiment. The figure which shows schematic structure of the light source device in the said embodiment. Sectional drawing which shows schematic structure of the light source device main body in the said embodiment. Sectional drawing which shows schematic structure of the sub-reflection mirror in the said embodiment. Sectional drawing which looked at the light source device in the said embodiment from the upper side. The figure which shows schematic structure of the light source device in 2nd Embodiment. The figure which shows schematic structure of the light source device in the said embodiment. Sectional drawing which shows schematic structure of the sub-reflection mirror in 3rd Embodiment. The expanded sectional view of the light-shielding member in 4th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector 10,100 ... Light source device, 11 ... Light source lamp, 12 ... Reflector (main reflecting mirror), 13 ... Sub-reflecting mirror, 14 ... Parallelizing lens (transparent lens) Optical members), 15, 150 ... support members, 16, 160 ... light shielding members, 42R, 42G, 42B ... liquid crystal panels (light modulation devices), 50 ... projection optical systems (projection optical devices) , 111 ... arc tube, 112 ... electrode, 122A ... reflective surface, 132A ... reflective film (reflective member), 160A ... irradiated surface, R21 ... luminous flux in the visible region, R22 ... infrared rays.

Claims (7)

A light source device comprising: a light-emitting tube having a discharge space; a light source lamp having a pair of electrodes disposed in the discharge space of the light-emitting tube; and a reflector that expands in a substantially concave shape in cross section and reflects a light beam emitted from the light source lamp Because
The reflector is configured to reflect a light beam in a visible region included in a light beam emitted from the light source lamp and transmit a light beam in an infrared region.
A sub-reflecting mirror disposed opposite to the reflecting surface of the reflector and having a reflecting member that reflects a part of the light beam emitted from the light source lamp toward the discharge space;
The light source device, wherein the reflection member is made of a material that reflects a light beam in a visible region and a light beam in an infrared region included in a light beam emitted from the light source lamp. The light source device according to claim 1,
The arc tube has a light emitting part where discharge light emission is performed between the pair of electrodes, and a sealing part provided at both ends of the light emitting part,
The sub-reflecting mirror has a bowl shape that covers the light emission front side of the light emitting unit,
The light source device according to claim 1, wherein the reflecting member is provided on an outer surface of a bowl shape spaced apart from the light emitting unit in the sub-reflecting mirror. The light source device according to claim 1 or 2,
A translucent member that is provided on the light emission front side of the reflector and transmits a light beam;
A light emission front side end portion of the reflector, and a support member that is connected to an outer peripheral end portion of the translucent member and integrates the reflector and the translucent member;
The support member has a cylindrical shape, an opening portion on one end side of the cylindrical shape is connected to a light emission front side end portion of the reflector, and an opening portion on the other end side of the cylindrical shape is an outer peripheral end portion of the translucent member. A light source device connected to the light source device. The light source device according to any one of claims 1 to 3,
A light source device, comprising: a light shielding member that is disposed on a light emission rear side of the reflector and shields a light beam in an infrared region transmitted through the reflector. The light source device according to claim 4,
The light-shielding member is made of a material that absorbs a light beam in an infrared region. The light source device according to claim 4,
The light-shielding member is configured to reflect a light beam in an infrared region, and an uneven surface for irregularly reflecting the light beam on an irradiation surface irradiated with the light beam in the infrared region is provided. . A projector comprising: a light source device; a light modulation device that modulates a light beam emitted from the light source device according to image information; and a projection optical device that enlarges and projects the light beam modulated by the light modulation device. ,
The projector according to claim 1, wherein the light source device is the light source device according to claim 1.

Images