Abstract: A portable telephone device with incorporated projector 10 displays the contents of a received email upon a main liquid crystal display device 204 This portable telephone device with incorporated projector 10 projects the contents of the received email after having changed its vertical-horizontal ratio (its row-column ratio) so that the number of characters in the horizontal direction becomes greater, as compared to the display screen of the main liquid crystal display device 204, upon which the numbers of characters being displayed vertically and horizontally are equal.

Abstract: An optical system is provided. The optical system includes an illumination system and a projection system. The illumination system includes a light source, a light guide unit, a first relay lens and a second relay lens, a reflection mirror, a reflection lens, and an image unit which are arranged sequentially along a light axis. The reflection lens includes a first surface which is coated with light-transmitting material and a second surface which has a reflection coating surface so that the light passing through the first surface is reflected.

Abstract: In a projection type display apparatus for enabling to display an image, by projecting an image on an image display element(s), enlargedly, upon a nearly horizontal surface, such as, a table, a reflection mirror for reflecting a light from a light source is so disposed that an optical axis of the light source is nearly perpendicular to an optical axis of a lens group having a plural number of lens elements, which are disposed symmetric with respect to the optical axis.

Abstract: Scanning projection device PJ two-dimensionally deflects a beam emitted from light source unit 1 and performs scanning with deflection element 3, and projects the beam obliquely on screen SC with projection optical system 7. By defining a range of an incident angle to screen SC properly, projection optical system 7 does not disturb an observation of images, and a correction of a spot shape does not become difficult. Further, by defining a ratio of scan-angle magnifications between in the vertical direction and the horizontal direction properly, difference in resolution between in the vertical direction and the horizontal direction can be reduced, and a high-quality and excellent image can be displayed, even when a beam obliquely projected.

Abstract: Provided is an image display apparatus, including: a light modulation element; an illumination optical system which includes at least one light source unit including a plurality of light emitting units two-dimensionally arranged and illuminates the light modulation element; and a projection optical system for enlarging and projecting an image of the light modulation element onto a projection surface, in which: an image of the plurality of light emitting units is imaged at a position corresponding to a stop of the projection optical system; the stop has an aperture shape of rotational asymmetry or of two-fold symmetry; and the plurality of light emitting units have illuminance intensities each independently controlled.

Abstract: A projector includes a projecting module for projecting a projecting image on a screen panel, an image sensor for capturing an image of an object which is located outside of the projecting module and faces toward the lens module, a light director, and a controlling unit. The projecting module has a lens module and a light source for emitting light transmitting through the lens module. The light director is movable between a first position where the light director is located outside of a light path associated with the lens module, and a second position where the light director is configured for directing light of the object through the lens module to be incident on the image sensor. The controlling unit controls the light director to move between the first and second positions.

Abstract: An apparatus in one example comprises a first component display with a first display area, a second component display with a second display area, and a beamsplitter. The first component display is positioned such that the first display area is viewable through the beamsplitter as a transmitted display area. The second component display is positioned such that the second display area is viewable from the beamsplitter as a reflected display area. The first component display, the second component display, and the beamsplitter are positioned such that the beamsplitter provides a composite image of the transmitted display area and the reflected display area. The reflected display area of the composite image is at least partially offset from the transmitted display area.

Abstract: A projection image display apparatus includes a lens unit into which light modulated in accordance with an image signal is entered, a first reflecting mirror having a reflecting surface into which the light passing through the lens unit is entered and by which the light is converged, a second reflecting mirror for reflecting the light reflected by the first reflecting mirror, and a mirror actuator for changing a tilt angle of the second reflecting mirror with respect to the light.

Abstract: A method and apparatus relate to a projection module having an input port with light source module mounting structure, an output port with lens module mounting structure, an image forming section, and optics. The method and apparatus involve: routing radiation arriving through the input port along a first path of travel defined by the optics to the image forming section; generating images at the image forming section from the radiation arriving along the first path of travel; and routing images from the image forming section to and through the output port along a second path of travel defined by the optics.

Abstract: Optical system for a projector, comprising: at least a first polarizing beam splitter for splitting a source illumination beam into a first illumination beam linearly polarized along a first direction and a second illumination beam polarized perpendicular to the first direction; at least one color wheel intersecting the polarized illumination beams in two different regions and producing a first color beam linearly polarized along the first direction and a perpendicularly polarized second color beam; and two imagers illuminated by the first and second polarized color beams respectively.

Abstract: A representative embodiment of the invention provides a projection system having a laser source that incorporates a tunable liquid lens and a spatial light modulator adapted to modulate light generated by the laser source to project an image on a viewing screen. The tunable liquid lens is adapted to vary focal length, alignment or position with respect to an optical element that is external to the lens, ability to diffuse light, and/or polarization rotation angle.

Abstract: A light source unit includes a light source group wherein light sources are arranged into rows and columns so as to form a planar configuration and a primary reflecting mirror group disposed on an optical axis of the light source group to reflect light beams emitted from the light source group as light beams whose sectional areas are reduced in a column direction by narrowing intervals between light beams emitted from the light sources making up the rows of the light source group, the primary reflecting mirror group includes different strip-like reflecting mirrors disposed on optical axes of light beams emitted from the rows of the light source group in a step-like fashion, and the reflecting mirrors are disposed to eliminate intervals between reflected light beams from the reflecting mirrors, thereby making it possible to reduce the sectional areas of the light beams.

Abstract: A multiple path stereoscopic projection system is disclosed. The system comprises a polarizing splitting element configured to receive image light energy and split the image light energy received into a primary path and a secondary path, a reflector in the secondary path, and a polarization modulator or polarization modulator arrangement positioned in the primary path and configured to modulate the primary path of light energy. A polarization modulator may be included within the secondary path, a retarder may be used, and optional devices that may be successfully employed in the system include elements to substantially optically superimpose light energy transmission between paths and cleanup polarizers. The projection system can enhance the brightness of stereoscopic images perceived by a viewer. Static polarizer dual projection implementations free of polarization modulators are also provided.

Abstract: A micro-mirror based projection display system in an enclosure with minimum chin and depth measurements is disclosed. A solid-state laser light source generates light of multiple primary colors that is modulated by a digital micro-mirror device. The projection optics of the system include a telecentric rear group of glass lenses with spherical surfaces, followed by a pair of aspheric lenses formed of plastic. A folding mirror is disposed between the aspheric lenses, to reduce the depth of the enclosure, and an aspheric mirror projects the image onto a TIR Fresnel projection screen. The aspheric lenses are magnifying, to reduce the magnification required of the aspheric mirror, and the aspheric lenses and mirror are clipped to reduce enclosure volume.

Abstract: A light source unit includes: an arc tube having a light-emitting portion; a secondary reflector covering part of the periphery of the light-emitting portion and being provided with a secondary reflecting surface for reflecting light emitted from the light-emitting portion; a primary reflector having a primary reflecting surface for reflecting the light emitted from the light-emitting portion and the light reflected from the secondary reflector; a first electrode; and a second electrode; wherein the second electrode is arranged at a position which causes an ionic wind to be induced by applying a voltage between the second electrode and the first electrode and causes air between the secondary reflecting surface and the light-emitting portion to flow, and either one of the first electrode or the second electrode is arranged between the arc tube and the secondary reflector.

Abstract: An projection type image display apparatus includes a projection optical system having a plurality of concave mirrors and digital micromirror device (DMD). An optical path from the DMD to the concave mirror closest to the DMD is a sealed space which is surrounded by an image forming device holding plate holding the DMD, an optical component holding member holding the concave mirror and the image forming device holding plate, and a cover glass (transparent dust-proof cover) arranged on the optical path from the DMD to the concave mirror closest to the DMD.

Abstract: An illuminating device includes a first light source unit emitting illumination beams with a first optical axis; a second light source unit; and two reflecting elements arranged on both sides of an optical path of the first light source unit. The reflecting element arranged on the side of the second light source unit reflects the illumination beams emitted from a substantially half region on one side in an aperture plane of the parabolic reflector of the second light source unit, towards the direction along the first optical axis. The reflecting element arranged opposite to the second light source unit reflects the illumination beams emitted from a substantially half region on the other side in the aperture plane of the parabolic reflector of the second light source unit, towards the direction along the first optical axis.

Abstract: A projection optical system including a projection lens, a first mirror that reflects a light from the projection lens, and a second mirror that widens an angle of a light from the first mirror by reflecting the light projects a light modulated according to an image signal from an optical engine unit. A third mirror reflects a light from the projection optical system. A screen transmits a light from the third mirror. An optical axis of the projection lens substantially matches an optical axis of the second mirror, and the light from the optical engine unit is shifted to a specific side from the optical axis of the projection lens.

Abstract: A light integration rod having a light input end and a light output end opposite to each other is provided. The light integration rod includes a first reflective plate, a second reflective plate, a third reflective plate and a fourth reflective plate. The second reflective plate is opposite to the first reflective plate. The third reflective plate and the fourth reflective plate connect the first reflective plate and the second reflective plate, and are disposed opposite to each other. A long side of the first reflective plate is not equal to a long side of the second reflective plate. A short side at the light output end of at least one of the first reflective plate and the second reflective plate is separate from a short side of the third reflective plate and a short side of the fourth reflective plate at the light output end.

Abstract: An illumination apparatus includes a plate-like separation optical element having a dichroic surface and a PBS surface. The dichroic surface reflects green component light and transmits yellow component light. The PBS surface transmits P polarization component light and reflects S polarization component light. The separation optical element combines red component light entering from a certain direction and transmitted through the dichroic surface, with yellow component light entering from a different direction and reflected by the PBS surface, and leads a combined light towards a red liquid crystal panel. The separation optical element combines green component light entering from the certain direction and reflected by the dichroic surface, with yellow component light entering from the different direction and transmitted through the PBS surface, and leads a combined light towards a green liquid crystal panel.

Abstract: A light source device includes: a light source which emits light; a first reflector which surrounds a part of the light source and reflects the light emitted from the light source in the direction of an optical axis; and a second reflector which surrounds at least a part of the light source different from the part surrounded by the first reflector and reflects the light emitted from the light source toward the first reflector, wherein the position of a convergence spot of the light reflected by the second reflector is displaced from the position of an emission spot of the light source at least in the direction of a plane perpendicular to the direction of the optical axis.

Abstract: The invention relates to a projector (1) for projecting an image (6), comprising: a light source (2) for generating a light bundle (12); a pivotable deflection unit (3) designed for deflecting the light bundle (12) generated by the light source (2) onto a projection surface (5); and an imaging device (7, 8, 9) for imaging an aperture of the deflection unit (3) onto the projection surface (5); wherein the imaging device (7, 8, 9) comprises a mirror objective (7) having at least two mirror elements (8, 9). The invention further relates to a corresponding method.

Abstract: An image display apparatus 100 that displays an image using a light modulated according to an image signal includes a projection optical system 90 that includes a projection lens 20, a first mirror 30 that reflects a light from the projection lens 20, and a second mirror 40 that widens an angle of a light from the first mirror 30 by reflecting the light, and projects the light modulated according to the image signal from an optical engine unit 10; a third mirror 50 that reflects a light from the projection optical system 90; and a screen 50 that transmits a light from the third mirror 50. The projection lens 20 and the second mirror 40 are arranged in such a manner that an optical axis of the projection lens 20 substantially matches an optical axis of the second mirror 40, and shift the light from the optical engine unit 10 to a specific side from the optical axis of the projection lens 20.

Abstract: An illuminator includes a light source that outputs light, a polarization separation device that separates the light outputted from the light source into polarization components of the first and second oscillation directions, the polarization components having mutually orthogonal polarizations, and a polarization conversion device that converts the polarization component of the second oscillation direction divided by the polarization separation device to the polarization component of the first oscillation direction. The polarization component of the first oscillation direction divided by the polarization separation device and the polarization component of the first oscillation direction converted by the polarization conversion device are incident on an incident surface of an illumination target from different directions from each other.

Abstract: The present invention generally relates to video and/or television projection systems, and more particularly, to LED based light source systems utilizing generally non-rotationally symmetric, preferably oblong or rectangular, non-imaging collection optics for providing improved projection systems relative to arc lamp and other LED based light source systems. The non-rotationally symmetric non-imaging collection optics are configured to operate with LEDs to provide preferred, generally, uniform light distributions whose étendues match those of downstream applications such as those encountered in projection systems. Also provided are various arrangements for coupling LED output to the entrance aperture of collection optics and for coupling the outputs from a plurality of collection optic outputs to form single beams of illumination of preferred patterns, intensities, and color.

Abstract: A projection display includes first and second light sources, a reflection/transmission member which partially transmits a first light beam from the first light source and partially reflects a second light beam from the second light source, and a light valve which converts the light beam from the reflection/transmission member into an optical image in accordance with a video signal. The reflection/transmission member has a reflective surface which is one side main surface, a light-shielding surface which is the other side main surface, and a plurality of openings extending through the both main surfaces. The first light beam is transmitted through the openings from the light-shielding surface to the reflective surface, and the second light beam is reflected off the reflective surface in the direction that the first light beam is transmitted.

Abstract: A mobile terminal includes an optical modulation projector. The mobile terminal also includes a control system, a projection control unit, and an optical modulation system. The control system outputs a projection control signal and image data. The projection control unit receives the image data from the control system, and generates and outputs a drive control signal depending on the image data received. The optical modulation system generates and modulates light and generates an image in response to the drive control signal and then scans the image for projecting onto a screen.

Abstract: An illumination unit and an image projection apparatus employing the same. The illumination unit includes: a first reflective surface reflecting light incident thereon; a light-emitting device generating and emitting illuminating light; and a second reflective surface reflecting light emitted from the light-emitting device to a light source surface that includes the light-emitting device.

Abstract: A light source unit and a projector apparatus secure a certain light quantity by improving the utilization efficiency of light, and thereby realize miniaturization. The light source unit includes a reflector having an opening for housing a lamp and an opening for radiating light, the reflector having an inner surface subjected to mirror surface working to be shaped in a polynomial surface, a light source equipped with a bulb and an electrode introducing unit guiding an electrode to the bulb, the bulb being inserted into the reflector from the opening and being disposed so that a focus position of the light reflected by an inner wall of the reflector is not located on the electrode introducing unit, and a condenser lens condensing the light emitted from the reflector, the condenser lens disposed so as to be located on an optical axis of light emitted from the light source.

Abstract: A light source device includes a light emitting tube having a light emitting section that emits light, a first sealing section on one side of the light emitting section formed integrally with the light emitting section, and a second sealing section on the other side of the light emitting section formed integrally with the light emitting section. A secondary reflecting mirror having a secondary reflecting surface covers part of a periphery of the light emitting section and reflects light emitted from the light emitting section. A primary reflecting mirror having a primary reflecting surface reflects the light emitted from the light emitting section and the light reflected by the secondary reflecting mirror.

Abstract: A display apparatus includes: a light modulation section having a plurality of translucent window sections; a light emitting section having a light source adapted to emit light; a light guide section having a tubular reflecting surface having a function of guiding the light from the light source to the light modulation section; and a light separation section provided to the light modulation section and disposed in a vicinity of the light source in parallel to or in substantially parallel to a lateral cross-sectional surface of the tubular reflecting surface, and having a light separation surface having a function of separating the light from the light guide section into transmitted light transmitted toward the light modulation section and reflected light reflected toward the light guide section, wherein the tubular reflecting surface narrows from the light modulation section toward the light emitting section so as to guide the reflected light to the translucent window sections, denoting a lateral cross-sectio

Abstract: Exemplary embodiments provide a projection-type display apparatus, which can address or realize a reduction in weight and size, a reduction in power consumption, and a reduction in noise, and address or realize a reduction in price, and a control method for the projection-type display apparatus, as well as a control program for the projection-type display apparatus. The projection-type display apparatus includes a solid-state light source that emits light, a mirror device that controls an emitting direction of the incident light to thereby subject the incident light to temporal modulation, and a projecting device that projects the modulated light.

Abstract: A projection type image display apparatus includes: a light source; an illumination optical system that uniformly illuminates beams, which are emitted from the light source, on a surface of an image modulation element as a primary image plane; and a projection optical system that projects image information of the primary image plane modulated by the image modulation element on a screen as a secondary image plane in an enlarged manner. The projection optical system includes a first optical system having a positive refractive power and including a plurality of transmissive surfaces, and a second optical system having a positive refractive power and including a concave reflective surface. The first optical system has a first reflective surface disposed between any surfaces of the plurality of transmissive surfaces, and a second reflective surface disposed between the first optical system and second optical system.

Abstract: A projection unit 17 effectively corrects out of focus due to a temperature rise. A mirror holding mechanism of a concave mirror 25 has a mirror holder 41 and a mirror holder base 42. The concave mirror 25 is slidably housed in the mirror holder 41. A focus correction member 57, which expands by heat, is disposed between a back face of the concave mirror 25 and reference plane S formed in the mirror holder. The concave mirror 25 and the focus correction element 57 are urged to the reference plane S by a mirror retainer spring 59.

Abstract: An image projecting apparatus has an integrator for generating plural secondary-light-source images for generating illumination light with a uniform intensity; and a variable stop mechanism arranged at or near a position conjugate with the secondary-light-source images. The variable stop mechanism has a base plate having a fixed aperture; and a stop blade which moves across the aperture for changing a quantity of light. The change in the quantity of light passing through said variable stop caused by the movement of said stop blade is greater than a change in a size of an effective region of a stop aperture.

Abstract: A light source device, includes: an arc tube, and a pair of sealing portions; a reflector; and a sub mirror configured to reflect the light emitted from the arc tube toward the arc tube, and disposed of the other side of the sealing portion in such a manner as to cover a part of the outer surface of the tube spherical portion of the side of the illumination area, the sub mirror include a plurality of reflection members provided with reflection surfaces having different shapes, and the distance between the illumination axis and the outer shape of one of the adjoining reflection members is different from the distance between the illumination axis and the other of the adjoining reflection members.

Abstract: A display apparatus and an imaging apparatus constructed such that a high-resolution clear three-dimensional video image can be viewed from any direction. The display apparatus projects frame images, projected from a projector such as an electronic projector, to a video image projection surface of a three-dimensional screen through a polygonal mirror provided around the three-dimensional screen, thereby providing a polyhedral video image such as a three-dimensional image to a person viewing from around the video image projection surface. The three-dimensional screen has a view field angle limiting filter and a directional reflection screen. The view field angle filter limits the angle of a view field in the left/right direction, the angle being the angle of the projection on the video image projection surface (50) of the screen. The directional reflection screen has two sheets in horizontal and vertical directions.

Abstract: The present invention relates to a projection device comprising at least one laser light source (2) and a scanning unit (7) arranged for scanning a projection area with a laser beam emitted from said laser source (2). The laser beam is adapted to be divergent at least when leaving the scanning unit (7) and a re-focusing optical element (9, 13) for focusing or collimating the divergent laser beam is arranged in beam direction behind said scanning unit (7). With the proposed projection device the risk for eye damage when looking into the projection beam is reduced.

Abstract: A projection optical apparatus capable of providing high image quality and having a reduced size. The projection optical apparatus comprises a light valve and a projection optical system including a first optical system (5) having a transmissive-refractive element and a second optical system (3?) having a reflective-refractive element. An image formed on the light valve is projected by the projection optical system on a projection surface (4). The optical axis in the first optical system (5) is folded both vertically and horizontally. The first group (5A) of the first optical system is contained in a space (dead space) whose lower limit is defined by a lower edge of the second optical system (3?)/thereby reducing the depth of the apparatus.

Abstract: An optical beam scanning device includes a polygon mirror 80 in which tilt angles with respect to a rotation axis of the polygon mirror 80 of respective plural reflecting surfaces are set to angles corresponding to photoconductive members associated with the respective reflecting surfaces, a post-deflection optical system A1 that guides light beams reflected and deflected by the respective plural reflecting surfaces in the polygon mirror 80 to the photoconductive surfaces of the photoconductive members corresponding to the respective reflecting surfaces, and a pre-deflection optical system 7a that shapes the light from the light source to be a light beam of a predetermined sectional shape and guides the light beam to the polygon mirror 80, the pre-deflection optical system 7a guiding the light from the light source to the polygon mirror 80 through an optical path that passes, in the main scanning direction, on an optical axis of the post-deflection optical system A1 and passes, in the sub-scanning direction,

Abstract: An optical projection system for use with a display surface includes at least one image source including an array of source image pixels, a projector to project a first projection of the array of source image pixels, and at least one mirror including at least one curved reflecting surface having a curved profile. The at least one curved reflecting surface is adapted to convert the first projection to a curved second projection directed onto the display surface to provide an array of displayed image pixels on the display surface corresponding to the array of source image pixels, wherein the array of displayed image pixels have constant pixel pitch among adjacent displayed image pixels.

Abstract: A method and a device for projecting an image made up of pixels onto a projection surface, including a variable-intensity light source emitting a light beam and a decoupling device, and a deflection device directing the light beam onto a projection surface. In The light beam(s) are deflected such that the beams strike mirror facets of the polygonal mirror twice in a row. The diameter at which the beam strikes the first mirror facet of the polygonal mirror is adjusted such that it is dimensioned to practically not be cut by the facet edges. At the second strike, the light beam always intersects the mirror facet at the same location.

Abstract: An illumination apparatus includes: first and second lamps; and a combining mirror configured to combine emitted lights from the first and second lamps The combining mirror includes first and second reflection surfaces opposing the first and second lamps respectively, being abutted vertically with respect to each other, whereby forming an edge. Since optical axes of the first and second lamp are respectively inclined with respect to a reference axis being orthogonal to a system optical axis of the illumination apparatus, central axes of the lights from the first and second lamps are incident on a downstream optical system in a state of being slightly inclined with respect to the system optical axis after being reflected on the first and second reflection surfaces respectively.

Abstract: A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. Elements of the light modulator may be controlled to adjust the intensity of light emanating from corresponding areas on the screen. The display may provide a high dynamic range.

Abstract: A projector includes a plane mirror that is disposed at one end side of an end portion of a screen and a projection optical system that is disposed at a position that is separated from a reflection surface side of the plane mirror. A light shielding plate is provided to at least one of two positions; one is between a fourth mirror and the plane mirror of the projection optical system, and the other is between the plane mirror and the screen.

Abstract: Throughput efficiency of an optical system is enhanced by using a directional light source coupled to a non-imaging optical element matched to a size and acceptance angle of an imaging lens. In various embodiments, a beam projection system and accompanying method are described that include a lamp body formed from a dielectric material. A bulb, placed adjacent to the lamp body, has a fill that forms a plasma when RF power is coupled to the fill from the lamp body. An optical train is optically coupled to the bulb to transform light generated by the plasma. The optical train includes a non-imaging optical element, an aperture, and at least one imaging lens element.

Abstract: A projection type image display apparatus has: an illumination optical system generating illumination light; a projection optical system projecting an image light onto a screen; a digital micromirror device (DMD) modulating the illumination light so as to form the image light; and a reflection mirror arranged in a position opposite to an optical path of the illumination light entering the DMD. The reflection mirror reflects an off-light reflected by the DMD in an “OFF” state in a direction separated from a projection light reflected by the DMD in an “ON” state.

Abstract: An image projection device comprising an image projection means (101) for projecting an image by laser light by using a one-dimensional or two-dimensional spatial light modulation element, a first folding mirror (102) for initially folding the laser light emitted from the image projection means (101), and a second folding mirror (103) for reflecting the laser light emitted from the image projection means (101) to a screen (107) through the first folding mirror (102), wherein a distance between the second folding mirror (103) and the image projection means (101) is made larger than a distance L by which a light output power emitted from the projection lens of the image projection means (101) with a solid angle of 38.4/(L×L) is less than 1 mW. Therefore, even when a person observes the image projection device (100) from a position onto which an image is projected, the person is in an area where safety is ensured, thereby enhancing the safety.

Abstract: Projected systems (10, 12, 14, 16) include light source apparatuses (20, 24, 26) for programming narrow bands of unpolarized blue, green, and red light to associated reflective imaging devices that reflect selected patterns of the blue, green, and red light into a dichroic cross-combiner assembly (70, 72, 74), which recombines the light into a composite image and directs it into a projection lens (90) The reflective imaging devices are preferably micromirror displays (50, 51) having an array of pivotable micromirrors (52, 53) that direct on-state micromirror light to the projection lens and direct off-state micromirror light to a light absorbing surface (84).

Abstract: A reflective mirror manufacturing method for manufacturing a reflective mirror used in an illumination device including an arc tube including a light-emitting portion and a reflective mirror including a reflective surface that reflects light from the light-emitting portion in a predetermined direction, includes: a first step of forming a tube by heating a tube including a material of the reflective mirror, thereafter putting the tube in a form block, applying internal pressure with an inert gas to cause a center portion of the tube to expand, so that part of an inner surface of the expanded center portion includes a shape corresponding to the reflective surface of the reflective mirror; a second step of cutting the tube at the center portion to form a reflective mirror member; and a third step of forming a reflective layer on an inner surface of the reflective mirror member.