JPH10319352A - Illuminator for projecting device and projecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illminator capable of brightening illumination light to a light valve by a usual light source as it is and a projecting device using it. SOLUTION: A partial reflection mirror member 5 constituted of partially a reflection mirror layer and a 1/4 wavelength plate layer on the reflection mirror layer is arranged in the vicinity of a second lens plate 3 of a fly eye integrator 4, and emission light from the second lens plate 3 transmits through the mirror layer unformed part of the partial reflection mirror member 5 to be emitted and to be made incident on polarizing beam splitters 12B,.... Second polarization emitted from the beam splitters 12B,... are reflected by reflection mirrors 16B,..., and the reflected light goes backward and advances at a prescribed angle with the relevant reflection mirror incident light, and is made incident on the reflection mirror layer to be reflected, and is converted to first polarization by the 1/4 wavelength layer, and the relevant reflection light illuminates the light valves 15B,... again through the polarizing beam splitters 12B,....

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to light of three primary colors including red light (hereinafter referred to as "R light"), blue light (hereinafter referred to as "B light") and green light (hereinafter referred to as "G light"). A lighting device that separates the colors and makes them incident on liquid crystal light valves respectively arranged for the color light, and modulates the incident light with a liquid crystal light valve, synthesizes the modulated light into colors, and performs color projection with a projection optical system. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection device for projecting an image, and more particularly to an improvement in an illumination optical system that uses a reflection type light valve as a light valve and has good illumination efficiency for the light valve.

[0002]

2. Description of the Related Art Conventionally, light of a light source emitted from a light source is separated into three primary colors of R light, G light and B light, and a reflection type light valve is arranged for each color light, and the light enters the light valve. FIG. 14 shows an example of a projection device that modulates and emits each color light with light or an electric signal for each color, combines the emitted light with a color combining optical system, and projects a color projection image with a projection lens. Such devices are known.

In the figure, reference numeral 201 denotes a light source.
Is composed of a lamp and a concave mirror such as an elliptical mirror. Light emitted from the light source 201 is reflected by an R light reflecting dichroic mirror 202 disposed on the optical axis in a direction perpendicular to the incident optical axis. The light is color-separated into G light and B mixed light traveling in the same direction as the incident optical axis. Further, the mixed light is directed by a G light reflecting dichroic mirror 203 arranged on the optical axis to a direction perpendicular to the optical axis, that is, a G light traveling in a direction parallel to the R light, and a G light traveling in the same direction as the incident optical axis. And the B light that travels to the right.

As described above, each dichroic mirror 20
The R light, G light, and B light separated into three colors by 2, 203 are incident on polarization beam splitters (PBS) 204R, 204G, 204B arranged for each light.
Each polarization beam splitter 204R, 204G, 204B
Of the respective colors, the P-polarized light of each color transmitted in the direction of the optical axis incident thereon and the S-polarized light reflected by the polarization splitter and reflected in a direction perpendicular to the incident optical axis. .

[0005] Then, a polarization beam splitter 2 for each color.
04R, 204G, and 204B, only the reflected S-polarized light out of the light incident on the polarization beam splitter 204.
R, 204G, and 204B are incident on reflective light valves 205R, 205G, and 205B disposed near the exit surfaces. The P-polarized light of each color is discarded as unnecessary light.

Next, each reflection type light valve 205R,
The light (S-polarized light) incident on 205G and 205B is generated by a write light signal for each color light if these light valves 205R, 205G and 205B are of the optical writing type, or if they are of the electric writing type. The modulated light is subjected to a modulation action by an electric signal of each color light, and the modulated light is emitted as P-polarized light, and the other light is emitted as mixed light of both polarized lights while the incident S-polarized light remains.
04R, 204G, and 204B again, and only the modulated light is polarized beam splitters 204R, 204G, and 204B.
The light passes through the polarized light separating portion B and travels to be projected light. The unmodulated light is reflected by the polarization separation unit, travels backward toward the light source, and is discarded.

Here, the polarization beam splitter 204B
Is transmitted through the G light reflecting dichroic mirror 206 and travels in the same direction as the incident direction.
G light reflection / B light reflection / R light transmission dichroic mirror 2
At 07 it is reflected at right angles.

The G light modulated light transmitted through the polarization beam splitter 204G is reflected by the G light reflecting dichroic mirror 206, travels in the same direction as the B light, and reflects G light, B light reflected, and R light transmitted. The light is reflected by the dichroic mirror 207.

Further, the R light modulated light transmitted through the polarization beam splitter 204R passes through the dichroic mirror 207, is combined with the B light and G light modulated light, travels, and is projected as a color image by the projection lens 208. Is done.

[0010]

However, in such a conventional device, R light and G light separated into three colors are used.
The light and the B light are respectively incident on the polarization beam splitters 204R, 204G, and 204B arranged for each color, and the polarization beam splitters 204R, 204G, and 204B.
The light valves 205R, 205G, and 205B can illuminate only with the amount of S-polarized light because the P-polarized light transmitted through the light is discarded. Therefore, it is considered that the brightness of the projected color image is sufficient. I could not say it. In particular, in the case of a device that projects on a large screen, there has been a big problem.

In order to make the projected image brighter, first, the output of the light source 201 may be improved. However, doing so requires an increase in the amount of power required, a problem of cooling due to heat generation of the light source unit, and furthermore, a reduction in the amount of light. A new problem, such as the disposal of the waste light, increases with the increase.

Therefore, the present inventors have studied a method of brightening illumination light to a light valve while using a conventional light source, and have accomplished the present invention.

[0013]

In order to solve this problem, the invention described in claim 1 is a light source for emitting random polarized light, a first lens plate having a plurality of lenses in a plane, and a plurality of lenses. And a so-called fly-eye integrator composed of a second lens plate having a plane in which light emitted from the light source is decomposed into light beams determined by the apertures of each lens of the first lens plate. Is condensed on each lens of the second lens plate, and the light emitted from the second lens plate is superimposed on a light valve to illuminate the light valve. Reflective mirror layer and one
A partial reflection mirror member having a 波長 wavelength plate layer is arranged, and light emitted from the light source is emitted through a portion of the partial reflection mirror member where no mirror layer is formed, and the emitted lights are separated from each other. There is provided a polarization separation unit that separates the polarized light into first and second polarized lights having vibrations in a direction perpendicular to each other and emits the polarized light in directions different from each other. A first polarization exit surface of the polarization splitting means; and a reflection mirror disposed near the second polarization emission surface of the polarization separation means such that the mirror surface is perpendicular to the optical axis. The second polarized light emitted from is reflected by the reflection mirror and travels,
The light enters the reflection mirror layer of the partial reflection mirror member arranged near the second lens plate via the polarization separation means, is reflected and converted into the first polarized light by the 波長 wavelength plate layer, and the reflected light Is a lighting device for a projection device that re-enters the polarization splitting means and illuminates the light valve through the polarized light splitting means.

According to a second aspect of the present invention, there is provided a light source for emitting randomly polarized light, a first lens plate having a plurality of lenses in a plane, and a second lens plate having a plurality of lenses in a plane. A so-called fly-eye integrator that decomposes light emitted from the light source into light fluxes determined by the apertures of each lens of the first lens plate, and condenses each light beam on each lens of the second lens plate Then, in the illumination device for a projection device that illuminates the light emitted from the second lens plate by superimposing the light on the light valve, the reflection mirror layer and the reflection mirror layer are partially provided on the second lens plate. A quarter-wave plate layer is formed, and the light emitted from the light source is emitted through the portion where the mirror layer is not formed, and the emitted light is vibrated in directions perpendicular to each other. Polarization separation into polarized light Polarized light separating means for emitting light in different directions from each other, wherein the polarized light separating means has a first polarized light emitting surface of the polarized light separating means disposed near the light valve as the object to be illuminated; In the vicinity of the second polarized light exit surface, a reflecting mirror is arranged so that the mirror surface is perpendicular to the optical axis, and the second polarized light emitted from the polarization separating means is reflected by the reflecting mirror and travels. Then, the light enters the reflection mirror layer on the second lens plate via the polarized light separating means, is reflected and converted into the first polarized light by the 波長 wavelength plate layer, and the reflected light is again polarized light separating means. Illuminating the light valve through the polarization splitting means.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, a plurality of field lenses are disposed between the second lens plate and the polarized light separating means. And

According to a fourth aspect of the present invention, in addition to the configuration of any one of the first to third aspects, a light beam determined by an opening of each lens of the first lens plate has an aperture of the opening. Among the light rays passing through the central part, the light rays of the second polarization, which are polarized and separated by the polarization splitting means among the light rays parallel to the optical axis, are reflected by the reflection mirror and enter the reflection mirror layer. During reflection, the reflection mirror layer is maintained parallel to the optical axis.

According to a fifth aspect of the present invention, in addition to the configuration according to any one of the first to fourth aspects, the arrangement of the reflection mirror layer and the portion where the mirror layer is not formed is determined by adjusting the center of the reflection mirror layer. The position and the center position of the portion where the mirror layer is not formed are set to be symmetrical with respect to a predetermined straight line.

According to a sixth aspect of the present invention, in addition to the configuration of any one of the first to fifth aspects, the reflection mirror layer and the quarter-wave plate layer are provided on each of the second lens plates. It is provided at a position corresponding to a boundary portion of the lens.

According to a seventh aspect of the present invention, there is provided an illuminating device, a light valve as a modulating means for modulating illuminating light from the illuminating device according to image information, and emitting the modulated light as light containing the modulated light. In a projection device having an analysis unit that detects the light emitted from the light valve and a projection optical system that projects the analysis light, the illumination device includes a light source that emits randomly polarized light, and a plurality of lenses. A so-called fly-eye integrator including a first lens plate having a planar shape and a second lens plate having a plurality of lenses in a planar shape, and emitting light from the light source to each lens of the first lens plate. Decomposing into a light flux determined by the aperture, condensing each light flux on each lens of the second lens plate,
In the illumination device for a projection device that illuminates the light emitted from the second lens plate so as to be superimposed on a light valve, a reflection mirror layer is partially provided in the vicinity of the second lens plate and a quarter of the reflection mirror layer is provided on the reflection mirror layer. A partial reflection mirror member having a wavelength plate layer is disposed, and the emitted light from the light source is transmitted through the non-mirror layer forming portion of the partial reflection mirror member and is emitted, and the emitted lights are perpendicular to each other. A polarization splitting unit that splits the polarized light into first and second polarized lights having vibrations in the directions and emits the polarized light in directions different from each other. The polarized light separating unit is provided near the light valve that is the object to be illuminated. A first polarized light exit surface is disposed, and a reflection mirror is disposed near the second polarized light exit surface of the polarized light separating means so that the mirror surface is perpendicular to the optical axis. The second Light travels is reflected by the reflection mirror via the polarization separator, the second
The light is incident on and reflected by the reflection mirror layer of the partial reflection mirror member disposed near the lens plate, and the first reflection is performed by the quarter wavelength plate layer.
The reflected light is converted into polarized light, and the reflected light is incident again on the polarized light separating means, and is set so as to illuminate a light valve via the polarized light separating means.Furthermore, the polarized light separating means and the analyzing means are the same polarizing beam splitter. It is characterized in that it is a certain projection device.

[0020] The invention described in claim 8 is a lighting device, a light valve as a modulating means for modulating the illuminating light from the illuminating device according to image information, and emitting the light containing the modulated light. In a projection device having an analysis unit that detects the light emitted from the light valve and a projection optical system that projects the analysis light, the illumination device includes a light source that emits randomly polarized light, and a plurality of lenses. A so-called fly-eye integrator including a first lens plate having a planar shape and a second lens plate having a plurality of lenses in a planar shape, and emitting light from the light source to each lens of the first lens plate. Decomposing into a light flux determined by the aperture, condensing each light flux on each lens of the second lens plate,
In the illumination device for a projection device that illuminates the light emitted from the second lens plate so as to be superimposed on a light valve, a reflection mirror layer is partially provided on the second lens plate, and a reflection mirror layer is provided on the reflection mirror layer. A 波長 wavelength plate layer is formed, and the emitted light from the light source is emitted through the portion where the mirror layer is not formed, and the emitted light is oscillated in directions perpendicular to each other. Is provided, a polarization separating unit that emits light in different directions from each other is provided, and the polarized light separating unit is arranged with a first polarized light emitting surface of the polarized light separating unit near the light valve that is the illuminated object. In the vicinity of the second polarized light exit surface of the polarized light separating means, a reflecting mirror is arranged so that the mirror surface is perpendicular to the optical axis, and the second polarized light emitted from the polarized light separating means is reflected by the reflecting mirror. Reflected and progressing, Via the serial polarization separation means, incident on the reflective mirror layer on the second lens plate, said reflected 1
The reflected light is converted into the first polarized light by the 波長 wavelength plate layer, and the reflected light is again incident on the polarization separating means, and is set so as to illuminate the light valve through the polarized light separating means. The means is a projection device that is the same polarizing beam splitter.

According to a ninth aspect of the present invention, in addition to the configuration of the seventh or eighth aspect, in the illuminating device, a plurality of field lenses are arranged between the second lens plate and the polarization separating means. And a light beam that passes through the center of the opening of the light flux determined by the opening of each lens of the first lens plate and is polarized by the polarization splitting means among light beams parallel to the optical axis. The separated second polarized light beam is reflected by the reflection mirror, is incident on the reflection mirror layer, and is set so as to be kept parallel to the optical axis in the reflection mirror layer portion at the time of reflection. The polarization splitting means and the analyzing means are the same polarization beam splitter.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment of the Invention] FIGS. 1 to 7 show a first embodiment of the present invention.

FIG. 1 is a configuration diagram for explaining the entire projection device according to the first embodiment.

In the figure, reference numeral 1 denotes a light source constituted by a lamp and a concave mirror such as an elliptical mirror. The light source 1 emits a randomly polarized light source.

The light from the light source is converted into a substantially parallel light beam by a shaping lens (not shown), and further passes through an infrared absorption filter (not shown) and an ultraviolet absorption filter (not shown).
The light is incident on a fly-eye integrator 4 composed of the lens plate 2 and the second lens plate 3. Each of the first and second lens plates 2 and 3 has a plurality of lenses 2a and 3a formed in a plane as shown in FIGS.

Thereafter, random polarized light is made incident on the field lens 6 via the partial reflection mirror member 5 disposed near the second lens 3. In this partial reflection mirror member 5, a plurality of reflection mirror layers 5b are partially formed on a transparent glass plate 5a as shown in FIG. 1 and FIG. 4 and the like, and a quarter of the reflection mirror layer 5b is formed on the reflection mirror layer 5b.
A wavelength plate layer 5c is provided, and a gap between each band is a non-mirror layer-forming portion 5d that transmits light. The randomly polarized light is transmitted through the non-mirror layer forming portion 5 d and is incident on the field lens 6.

Next, the randomly polarized light passing through the field lens 6 is incident on the cross dichroic mirror 7. This cross dichroic mirror 7 is used for R light, G light,
The dichroic mirror 8 that reflects the light and the dichroic mirror 9 that reflects the B light
Are arranged in a mold.

Here, the separated B light travels in a direction perpendicular to the incident optical axis, the traveling direction is changed to a right angle by the bending mirror 10, and further travels through the B light field lens 11B. , Polarizing beam splitter for B light (polarizing beam splitter) as "polarization separating means, analyzing means"
It is incident on 12B.

The mixed R and G light separated by the cross dichroic mirror 7 travels by changing the optical axis to a right angle by the bending mirror 13 and is arranged at an incident angle of 45 degrees with respect to the optical axis. G light reflection dichroic mirror 1
R, which enters and transmits through and travels in the same direction as the incident optical axis.
The light is color-separated into light and G light reflected in a direction perpendicular to the light, and is incident on the polarization beam splitters 12R, 12G for the respective color lights via feed lenses 11R, 11G, respectively.

Each of the polarization beam splitters 12R, 12G,
Each of the color lights incident on 12B is reflected as a “second polarized light” as a “second polarized light” which is reflected and emitted by each polarization separation unit, and as a “first polarized light” as transmitted and emitted in the same direction as the incident direction. It is polarized and separated into P-polarized light. Both polarized lights are emitted in directions orthogonal to each other.

Each of the polarization beam splitters 12R, 12G,
The P-polarized light of each color emitted through the 12B is reflected by the reflection type light valve 15R, 15G, 15 disposed near the emission surface of the polarization beam splitter 12R, 12G, 12B for each color.
It is incident on B and illuminated.

On the other hand, each polarization beam splitter 12R, 1
The S-polarized light of each color reflected and emitted from 2G and 12B is disposed near the exit surface of each of the polarization beam splitters 12R, 12G and 12B, and is a mirror image of the light valves 15R, 15G and 15B with respect to the polarization splitting unit. Reflection mirrors 16R and 16 whose reflection surfaces are arranged at positions perpendicular to the optical axis.
G, 16B and is reflected according to the law of reflection.

The S-polarized light reflected by the reflection mirrors 16R, 16G, and 16B maintains the S-polarized state as it is, travels backward in the same optical axis as the incident light beam, and travels in the opposite direction. The light is incident on 12G and 12B, is reflected and emitted by the polarization separation unit, and is transmitted through the field lenses 11R, 11G and 11B for each color light.

Then, the S-polarized light of the B light reflected by the reflecting mirror 16B is reflected by the B light reflecting dichroic mirror 9 and passes through the field lens 6 to the reflecting mirror layer 5b on the partially reflecting mirror member 5. It is incident and is further reflected.

The S-polarized light of the R light and the G light reflected by the reflection mirrors 16R and 16G travels in the opposite direction on the same optical axis as the incident light, similarly to the B light.
And the light is further reflected by the dichroic mirror 8 and travels.
And is reflected again by the reflection mirror layer 5b.

At this time, the S-polarized light of the R light, G light and B light incident on the reflection mirror layer 5b on the partial reflection mirror member 5 is reflected on the 波長 wavelength plate formed on the reflection mirror layer 5b. The light enters the reflection mirror layer 5b via the layer 5c, but is reflected and converted again from S-polarized light to P-polarized light by passing through the quarter-wave plate layer 5c again. Proceed in the direction.

Since the quarter-wave plate layer 5c is disposed so that its fast axis has an angle of 45 degrees with the oscillation direction of the incident polarized light, it passes through once and is converted into circularly polarized light. By being reflected again and passing through, it is converted into linearly polarized light whose vibration direction has been converted by 90 degrees.

Each color light, which is converted from S-polarized light to P-polarized light, travels again to the dichroic mirrors 8 and 14.
, The R light and the G light, and the dichroic mirror 9 separates the B light into three colors.
G, 11B, polarization beam splitter 12 for each color light
R, 12G, and 12B are incident.

Each of the polarizing beam splitters 12R, 12G,
Each reflected color light from the reflection mirror layer 5b incident on the reflection mirror layer 12B is P-polarized light as described above, so that the reflected color light passes through the polarization splitters of the polarization beam splitters 12R, 12G, and 12B, and exits. Valves 15R, 15G, 15
B, and these light valves 15R, 15G,
Illuminate 15B.

As described above, the light valve 15 for each color light
Illumination for R, 15G, 15B has been described. As described above, since conventionally discarded S-polarized light can be converted into P-polarized light by the present invention to illuminate the light valves 15R, 15G, and 15B, it can be understood that efficient superimposed illumination can be achieved.

Then, each of the light valves 15R, 15G,
The P-polarized illumination light incident on 15B is modulated by image signals of the light valves 15R, 15G, and 15B. The modulated light becomes S-polarized light and is mixed with unmodulated light (P-polarized light) as mixed light.
G, 15B, and only the modulated light is reflected by the polarization splitters of the polarization beam splitters 12R, 12G, 12B for each color light, and the unmodulated light is transmitted and discarded, thereby achieving the light detection.

Each of the polarization beam splitters 12R, 12G,
The analysis light reflected and emitted from 12B enters the cross dichroic prism 18 constituting the color combining optical system from different incident surfaces. The cross dichroic prism 18 has a B light reflecting dichroic film 18B and an R light reflecting dichroic film 18R which are orthogonal to each other in the prism 18, and the incident R light is dichroic by the dichroic film 18R. G is reflected in the same direction by the film 18B.
Light passes through the two films 18B and 18R and also travels in the same direction. These R light, G light, and B light are emitted as projection light, enter a projection lens 19 as a “projection optical system”, and are projected as a high-luminance color image on a screen (not shown). Further, since the configuration employing the fly-eye integrator 4 is the basis of the present invention, a projection image with uniform brightness can be obtained.

Here, the illumination optical system for each of the light valves 15R, 15G and 15B as an object to be illuminated according to the present invention will be described in further detail.

FIG. 2 shows a main part of an illumination optical system for a light valve of the projection device. Originally, R
Although light, G light, and B light should be described, the three light valves 15R and 15 have the same optical path length and the same basic configuration for all three colors.
G, 15B as a light valve 15, polarization beam splitters 12R, 12G, 12B as polarization beam splitters 12, and field lenses 11R, 11G, 1
1B is a field lens 11, and the reflection mirror 1
6R, 16G and 16B are described as the reflection mirror 16. Here, the illustration of the three-color separation / synthesis optical system and the bending mirror is omitted.

FIG. 3 is a perspective view showing the shape of the first lens plate 2. As shown in this figure, the surface has a configuration in which 6 × 5 vertical convex lenses 2a are arranged in a plane, and the surface opposite to the surface on which the lens 2a is formed is It is a plane.

However, the lens 2 in the first horizontal row, which is the top horizontal row, and the fourth horizontal row, which is the fourth horizontal row from the top,
“a” is formed in a shape obtained by cutting the upper half of the other lens 2a, and is half the size of the other lens 2a.

The outer shape of the second lens plate 3 is substantially the same as that of the first lens plate 2 shown in FIG. 2, and the arrangement of the lenses 3a formed of convex lenses on the surface is the same as that of the first lens plate 2. The arrangement is the same as that of 2, which is 6 × 5. However, the shape of the lens 2a of the first lens plate 2 and the shape of the lens 3a of the second lens plate 3 are different. This is because the purpose is different between the lens 2a of the first lens plate 2 and the lens 3a of the second lens plate 3, as described below.

In the first embodiment, the light source light from the light source 1 is shaped into a substantially parallel light beam by a shaping optical system (not shown) and is incident on the first lens plate 2, and the lens 2a on the first lens plate 2 Due to the aperture determined by each of the individual lenses, the individual parallel light beams
It is set to converge on a. That is, the first
The shape of the lens 2a on the first lens plate 2 and the position of the second lens plate 3 are set such that the lens 3a of the second lens plate 3 is disposed substantially at the focal position of the lens 2a of the lens plate 2. It is determined. The light spot on the lens 2a of the first lens plate 2 is moved by the opposing lens 3a on the second lens plate 3, through the field lens 6 and the field lens 11, on the light valve 15, and on the light valve 1
The shape of the lens 3a of the second lens plate 3 is determined so that an image is formed on the reflection mirror 16 arranged at a position conjugate with the lens 5.

FIG. 4 shows the structure of the partial reflection mirror member 5 disposed close to the exit surface of the second lens plate 3, as shown in FIG. This is, as described above, a strip-shaped reflection mirror layer 5b extending along the lateral direction on the transparent glass plate 5a.
And a 1/4 wavelength plate layer 5c disposed on the reflection mirror layer 5b.

Then, the partially reflecting mirror member 5 is
When it is arranged close to the lens plate 3, the second lens plate 3
It is arranged so that the position of the horizontal line of the boundary line of the individual lenses 3a and the center position of the reflection mirror layer 5b band of the partial reflection mirror member 5 substantially coincide with each other.

The width of the reflecting mirror layer 5b of the partially reflecting mirror member 5 in the first embodiment is different from that of the reflecting mirror layer 5b.
And the mirror layer non-forming portion 5d. However, the width of the reflecting mirror layer 5b in the third and sixth rows from the top is half the width of the other rows, and the mirror between the third and fourth rows of the reflecting mirror layer 5b The width of the non-layer portion 5d is set to be the same as the width of the third-row reflection mirror layer 5b.

This is because when the partial reflection mirror member 5 is arranged close to the second lens plate 3, the band of the reflection mirror layer 5b is close to the position near the peak of the convex portion of the lens 3a. It is because it is arranged.

The arrangement of the reflection mirror layer 5b and the non-mirror layer forming portion 5d depends on the center position (O1, O2, O3, O4, O5, O6) of the reflection mirror layer 5b and the mirror layer non-forming portion 5d. Center position (O1, O2, O3, O4
O5, O6) are respectively predetermined straight lines (center line OA)
Is set to be symmetrical with respect to.

Next, how the first lens plate 2, the second lens plate 3, and the field lenses 6, 11 form an image on the light valve 15 and the reflection mirror 16 will be described with reference to FIG.

The light beams shown in FIG. 5 are the two light beams on the outermost sides of the apertures formed by the individual lenses 2a on the first lens plate 2 and the three light beams incident on the center parallel to the optical axis.
The position immediately above the center line O and the lowermost lens aperture are described.

Of the light rays entering each opening of the first lens plate 2, the light rays incident parallel to the optical axis and passing through the center of each opening are the first lens plate 2 of the second lens plate 3. Passes through the central portion of the lens 3a facing the opening of the lens, passes through the non-mirror layer-forming portion 5d of the partial reflection mirror member 5, and is parallel to the optical axis with each other (that is, while maintaining telecentric characteristics). The light travels and is condensed by the field lenses 6 and 11 at substantially the center of the light valve 15 and the reflection mirror 16.

Light rays incident on the upper portions of the openings of the first lens plate 2 in the drawing in parallel to the optical axis are positioned at the focal length of the lens 2a of the first lens plate 2 as described above. Since the second lens plate 3 is arranged at the center, the light beam passing through the center of the opening on the first lens plate 2 intersects at the center of the lens 3a of the second lens plate 3, and similarly the partial reflection The light valve 15 shown in FIG.
And the right portion of the reflection mirror 16.

Further, the light rays incident parallel to each other at the lower part of the opening on the first lens plate 2 in the drawing are shifted to the focal position of the lens 2a of the first lens plate 2 as described above. 3, the light beam passing through the center of the opening on the first lens plate 2 intersects with the light beam passing through the center of the lens 3 a of the second lens plate 3. The light passes through the transparent portion, which is the non-layer-forming portion 5d, and is condensed by the field lenses 6 and 11 on the upper portion of the light valve 15 and the left portion of the reflection mirror 16 in the drawing.

Here, the illumination of the light valve 15 with the P-polarized light transmitted through the polarization beam splitter 12 illuminates the reflection mirror 16 with the reflected S-polarized light and the mirror image of the polarization beam splitter of the polarization beam splitter 12. It is illuminated in the relationship. This is because the light valve 15 and the reflection mirror 1
6 is disposed at a conjugate position in the illumination optical system.

Next, an optical system for illuminating the light valve 15 with the light reflected by the reflection mirror 16 will be described.

FIG. 6 shows the state in which a light beam incident on the opening located immediately above the center line O of the first lens plate 2 is incident on the reflection mirror 16 and the light beam reflected by the reflection mirror 16 is illuminated on the light valve 15. FIG.

As in FIG. 5, the center of the aperture located just above the center line O of the first lens plate 2 and the 3
Light rays are described.

First, a light beam incident on the central portion of the opening of the first lens plate 2 in parallel with the optical axis has a predetermined angle with respect to the optical axis at substantially the central portion of the reflection mirror 16 from the description of FIG. And is reflected by the law of reflection. This reflection mirror 16
Are arranged perpendicular to the optical axis. Therefore, the incident light beam reflected by the mirror 16 according to the law of reflection enters the polarization beam splitter 12 again because it is S-polarized light, reflects the polarization beam splitter of the polarization beam splitter 12, and enters the incident optical axis. After passing through the field lenses 11 and 6, the light is made parallel to the optical axis after passing through the field lens 6 (that is, while maintaining telecentric characteristics), and the partial reflection mirror member 5 The light enters the reflection mirror layer 5b via the 波長 wavelength plate layer 5c. This incident reflection mirror layer 5b
Is a position corresponding to the lower portion of the lens 3a of the second lens plate 3 in the drawing (a position symmetrical with respect to the center line OA with the mirror layer non-formed portion 5d of the partial reflection mirror member 5 through which the light beam is transmitted and emitted). ). The light beam incident on the reflection mirror layer 5b maintains telecentricity and is reflected in a direction completely opposite to the incident direction because it is in a direction parallel to the optical axis. Pass through again to become P-polarized light,
The light travels with a predetermined inclination with respect to the optical axis, enters the polarization beam splitter 12, passes through the polarization splitter of the polarization beam splitter 12, and enters the light valve 15.

The light rays incident parallel to the optical axis on the upper part of the opening of the lens 2 a at the position just above the center line O of the first lens plate 2 are reflected by the first lens plate 2 on the lens 3 a of the second lens plate 3. Intersects with the light beam passing through the central part of the opening, passes through the non-mirror layer forming portion 5d of the partial reflection mirror member 5, and proceeds.
Field lenses 6, 11 and polarizing beam splitter 1
After that, the light is incident on the right part of the reflection mirror 16. And
The light beam reflected by the reflection mirror 16 travels with a predetermined inclination with respect to the incident light beam, enters the polarization beam splitter 12, is reflected by the polarization splitter, passes through the field lenses 6, 11, and passes through the central portion of the opening. Is focused on the reflection mirror layer 5b of the partial reflection mirror member 5 at the same position as the light beam incident on the partial reflection mirror member 5 at an angle to the optical axis. The light reflected by the reflection mirror layer 5b of the partial reflection mirror member 5 is reflected and travels according to the law of reflection, is converted into P-polarized light, passes through the field lenses 6 and 11, and is polarized.
2, and is incident on the upper part of the light valve 15 at a predetermined angle with respect to the optical axis.

Further, the light beam incident on the lower part of the opening of the first lens plate 2 in parallel with the optical axis passes through the center of the opening of the first lens plate 2 on the lens 3a of the second lens plate 3. Intersects with the light beam, passes through the non-mirror layer-forming portion 5d of the partial reflection mirror member 5, and travels therethrough.
And the reflection mirror 1 through the polarizing beam splitter 12
6 is incident on the left side. The light reflected by the reflecting mirror 16 travels with a predetermined inclination with respect to the incident light, enters the polarization beam splitter 12, is reflected by the polarization splitting unit, passes through the field lenses 11 and 6, and passes through the central portion of the opening. The reflection mirror layer 5b of the partial reflection mirror member 5 at a predetermined angle with respect to the optical axis at the same position as the light beam incident on
Is collected. The light reflected by the reflecting mirror layer 5b of the partially reflecting mirror member 5 is reflected and travels according to the law of reflection, is converted into P-polarized light, and is converted into P-polarized light.
Then, the light enters the polarization beam splitter 12 and enters the lower part of the light valve 15 at a predetermined angle with respect to the optical axis.

FIG. 7 shows three similar light rays incident on the first lens plate 2 at openings different from those described above. FIG. 7 shows three rays incident on the opening of the lens 2a formed at the lowermost part in the drawing of the first lens plate 2.

The light beam incident on the center of the opening parallel to the optical axis is directed to the opposite lens 3 of the second lens plate 3.
The light travels in the central portion of a in parallel with the optical axis, and enters the substantially central portion of the reflection mirror 16 via the field lenses 6 and 11 and the polarizing beam splitter 12 at a predetermined incident angle with respect to the optical axis. The light reflected by the reflection mirror 16 travels with a larger inclination with respect to the optical axis than the light beam shown in FIG. On the drawing of the partially reflecting mirror member 5, the uppermost reflecting mirror layer 5b (the mirror layer non-forming portion 5d through which the light is transmitted and the center thereof are converted into parallel rays (that is, while maintaining the telecentric characteristic)). The light is incident on the reflection mirror layer 5b) symmetrical with respect to the line OA via the quarter-wave plate layer 5c.

The light reflected by the reflection mirror layer 5b is converted to P-polarized light in the same light direction as the incident light and travels, because the telecentricity is maintained, and the light is reflected by the field lenses 6, 11 and the polarization beam splitter. The light is incident on the light valve 15 through the center 12 at a substantially central portion with respect to the optical axis as compared with FIG.

Light rays incident on the upper part of the opening of the lens 2a of the first lens plate 2 in parallel with the optical axis are incident on the second lens plate 3.
Intersects with the light beam passing through the central portion of the opening of the first lens plate 2, passes through the non-mirror layer-forming portion 5d of the partial reflection mirror member 5, and travels on the lens 3a. The light is incident on the right part of the reflection mirror 16 through the polarization beam splitter 12 at an angle larger than the incident angle in FIG. The light beam reflected by the reflection mirror 16 travels with a larger inclination with respect to the optical axis than the incident light beam as shown in FIG. The light is condensed on the reflection mirror layer 5b of the partial reflection mirror member 5 at a predetermined angle with respect to the optical axis at the same position as the light beam incident on the central portion of the opening. The light reflected by the reflection mirror layer 5b of the partial reflection mirror member 5 is reflected and travels according to the law of reflection, is converted into P-polarized light, enters the polarization beam splitter 12 through the field lenses 6 and 11, and
The light is incident on the upper part of the light valve 15 at a predetermined angle with respect to the optical axis.

Further, the light beam incident on the lower part of the opening of the first lens plate 2 in parallel with the optical axis passes through the center of the opening of the first lens plate 2 on the lens 3 a of the second lens plate 3. Intersects with the light beam, passes through the non-mirror layer-forming portion 5d of the partial reflection mirror member 5, and travels therethrough.
And the reflection mirror 1 through the polarizing beam splitter 12
6 is incident on the left side at an incident angle larger than that in FIG. The light reflected by the reflecting mirror 16 travels with a predetermined inclination with respect to the incident light, enters the polarization beam splitter 12, is reflected by the polarization splitting unit, passes through the field lenses 11 and 6, and passes through the central portion of the opening. Are focused on the reflection mirror layer 5b of the partial reflection mirror member 5 at a fixed angle with respect to the optical axis at the same position as the light beam incident on. The light reflected by the reflection mirror layer 5b of the partial reflection mirror member 5 is reflected and travels according to the law of reflection, is converted into P-polarized light, enters the polarization beam splitter 12 through the field lenses 6 and 11, and is incident on the optical axis. The light is incident on the lower part of the light valve 15 at a predetermined angle.

Although FIG. 7 shows the light beam passing through the lowermost opening of the first lens plate 2 in the drawing, the light beam entering this upper opening is the light beam described in FIG. It can be understood that the reflected light from the reflection mirror 16 is incident on the reflection mirror layer 5b formed immediately below the reflection mirror layer 5b of the partial reflection mirror member 5. In other words, the light beam emitted from the lens 2a of the first lens plate 2 is reflected by the reflection mirror layer of the partial reflection mirror member 5 disposed at a position symmetrical with respect to the center line OA at the emission position of the lens 2a. It can be seen that the light is incident on 5b.

As described above, the reflecting mirror 16 is arranged perpendicular to the optical axis, and the S-polarized light reflected by the polarizing beam splitter 12 is reflected by the reflecting mirror 16.
Is reflected by the polarization beam splitter 12 again, and travels again.
Is incident on the reflection mirror layer 5b of the partial reflection mirror member 5 disposed in the vicinity of via the 波長 wavelength plate layer 5c. Then, the light is reflected by the reflection mirror layer 5b, travels backward again, and is converted into P-polarized light by passing twice through the quarter-wave plate layer 5c. The light valve 15 can be transmitted and emitted to illuminate the light valve 15.

That is, conventionally discarded S-polarized light is converted into P-polarized light by the present invention, and is incident on the light valve 15 and can contribute to illumination. The light source light originally incident on the polarization beam splitter 12 is High-brightness illumination can be achieved by being superimposed on the P-polarized light that illuminates the light valve 15 through the polarization beam splitter 12, thereby increasing the brightness of the projected image even when the same light source 1 as in the related art is used. Can be achieved. Further, in the present invention, since the so-called fly-eye integrator 4 using the first lens plate 2 and the second lens plate 3 is used, the first lens plate 2 is divided by the individual apertures of the lens 2a. Since the light beam is superimposed on the light valve 15 by the lens 2a of the second lens plate 2, an effect of achieving uniform illumination can be achieved.

[Second Embodiment of the Invention] FIGS. 8 and 9 show a second embodiment of the present invention.

The partially reflecting mirror member 5 according to the second embodiment
In the first embodiment, the reflection mirror layers 5b and 1/4
The difference is that the wavelength plate layer 5c has a vertical band shape while the horizontal band shape has. Then, in the same manner as in the first embodiment, the partial reflection mirror member 5 with respect to the vertical center line OB.
The non-mirror layer forming portion 5d and the reflection mirror layer 5b are set in a symmetrical positional relationship.

The partially reflecting mirror member 5 is disposed in the vicinity of the second lens plate 3 as in the projection device of FIG. 2, but is close to the vertical line of the joint of the lenses 3a of the second lens plate 3. The center of the band of the reflection mirror layer 5b of the partial reflection mirror member 5 needs to be arranged at the position where the reflection is performed.
That is, the incident light beam condensed at the center of the lens 3a of the second lens plate 3 is transmitted through the non-mirror layer-forming portion 5d of the partial reflection mirror member 5, and conversely, the reflection of the partial reflection mirror member 5 is performed. This is to prevent the amount of light reflected by the mirror layer 5b in the direction of the light source 1 and illuminating the light valve 15 from decreasing.

FIG. 9 shows the shape of the first lens plate 2. As shown in the figure, the surface has a configuration in which 6 × 5 vertical (in the first embodiment, 5 × 6 vertical) convex lenses 2a are arranged in a plane, and the lens 2a
The surface opposite to the surface on which is formed is a flat surface.

However, the lens 2 in the first vertical column, which is the rightmost vertical column, and the fourth vertical column, which is the fourth vertical column from the right.
“a” is formed in a shape obtained by cutting the right half of the array of the other lenses 2a in the tandem, and is half the size of the other lenses 2a.

The outer shape of the second lens plate 3 is substantially the same as that of the first lens plate 2 shown in FIG. 9, and the arrangement of the lenses 3a formed of convex lenses on the surface is the same as that of the first lens plate 2. The arrangement is the same as that of 2, which is 6 × 5. However, the shape of the lens 2a of the first lens plate 2 and the shape of the lens 3a of the second lens plate 3 are different.

[Third Embodiment of the Invention] FIGS. 10 and 11
Shows a third embodiment of the present invention.

The partially reflecting mirror member 5 of the third embodiment
In the first and second embodiments, the reflection mirror layers 5b and 1 /
While the four-wavelength plate layer 5c has a horizontal band shape or a vertical band shape,
They differ in that they are in a grid.

In this partially reflecting mirror member 5, the mirror layer non-forming portion 5d and the reflecting mirror layer 5b have a symmetrical positional relationship with respect to the center line OA along the horizontal direction, and the center line along the vertical direction. Mirror non-forming portion 5 for OB
d and the reflection mirror layer 5b have a symmetrical positional relationship. Of course, the quarter-wave plate layer 5c is provided on the reflection mirror layer 5b.
Are formed.

The partial reflection mirror member 5 is disposed in the vicinity of the second lens plate 3 in the same manner as in the projection device of FIG. 2, but the horizontal line of the joint between the lenses 3a of the second lens plate 3 and It is necessary to adopt a configuration in which the grating of the reflection mirror layer 5b is arranged at a position close to the vertical line.

FIG. 11 shows the shape of the first lens plate 2. As shown in this figure, a convex lens 2a having a width of 6 × 6 (5 × 6 in the first embodiment, 6 × 5 in the second embodiment) has a planar shape on the surface. The surface opposite to the surface on which the lens 2a is formed is a flat surface.

However, the lens 2 in the first horizontal row which is the top horizontal row and the fourth horizontal row which is the fourth horizontal row from the top
a is formed in a shape obtained by cutting the upper half of the arrangement of the other lenses 2a.

Further, the lens 2 in the first vertical column which is the rightmost vertical column and the fourth vertical column which is the fourth vertical column from the right.
“a” is formed in a shape obtained by cutting the right half of the array of the other tandem lenses 2a.

Further, the second lens plate 3 corresponds to the first lens plate shown in FIG.
The lens plate 2 and its outer shape are substantially the same size, and the arrangement of the lenses 3a formed of convex lenses on the surface is the same as that of the first lens plate 2, that is, 6 × 6.

In such a configuration, the light source luminous flux transmitted through the non-mirror layer-forming portion 5d of the partial reflection mirror member 5 enters the polarization beam splitter 12 as described in the second embodiment, and is deflected by the polarization separation section. The S-polarized light reflected by the light exits, is reflected by the reflection mirror 16, is reflected again by the polarization splitting portion of the polarization beam splitter 12, and is reflected by the corresponding reflection mirror layer 5b of the partial reflection mirror member 5 according to the present invention. The incident light is converted into P-polarized light by passing twice through the quarter-wave plate layer 5c.
2 and is superimposed on the P-polarized light to achieve illumination.

In Embodiments 1 and 2 described above, the illumination optical system has a configuration in which the partial reflection mirror member 5 is disposed near the exit surface of the second lens plate 3. May be located near the incident surface of the second lens plate 5.

[Embodiment 4] FIGS. 12 and 13
Shows a fourth embodiment of the present invention.

In each of the above embodiments, the partial reflection mirror member 5 having the function of condensing the reflected light from the reflection mirror 16 and reflecting it again is provided independently. A component corresponding to the reflection mirror member 5 is formed on the second lens plate 3.

That is, the lens 3 of the second lens plate 3
The reflection mirror layer 5b and the quarter-wave plate layer 5c are provided on a plane portion on the side opposite to the a-forming side and at a position corresponding to the boundary between the lenses 3a on the second lens plate 3 in FIGS. As shown in FIG. However, the present invention is not limited thereto, and the reflection mirror layer 5b and the like may be in a vertically parallel band shape as shown in the second embodiment, or may be a lattice shape as shown in the third embodiment. In other words, the shape of the reflection mirror layer 5b and the like depends on the lenses 2a and 3 of the first and second lenses 2 and 3 to be used.
It is determined by the shape of a.

The construction of the lenses 2a and 3a of the first and second lens plates 2 and 3 is the same as that of the first embodiment, however, these lens plates 2 and 3
a is arranged to face inward (see FIG. 13).

In such a device, the light source light emitted from the light source 1 is converted into a substantially parallel light beam by a shaping optical system (not shown), passes through the lens 2a of the first lens plate 2, and is focused on the lens 2a. At a distance, the light enters the lens 3a of the second lens 3 disposed at a position facing each of these lenses 2a. The light beam that passes through the non-mirror layer-forming portion 5d and passes through the field lenses 6 and 11 and is parallel to the optical axis is polarized and separated by the polarization beam splitter 12 of the polarization beam splitter 12, and passes through the polarization beam splitter as it is. The P-polarized light illuminates the light valve 15, and the S-polarized light reflected by the polarization splitter enters the reflection mirror 16 and is reflected by the reflection mirror 16. Thus, the light again enters the polarization beam splitter 12 and is reflected by the polarization separation unit.
It is emitted and proceeds, passes through the field lenses 11 and 6,
The light enters the reflection mirror layer 5b of the second lens plate 3 in parallel with the optical axis (that is, while maintaining telecentric characteristics). The light beam reflected by the reflection mirror layer 5b maintains the telecentric characteristic up to the field lens 6, that is, reflects and proceeds in a direction opposite to the incident light beam, is incident again on the polarization beam splitter 12, and is directly incident on the polarization beam splitter. The light valve 15 is illuminated through the splitter 12.

Also in this case, similarly to the first embodiment, the polarization beam splitter 12 which has been discarded in the prior art is used.
Is converted into S-polarized light reflected by the
The light valve 1 has a P-polarized light transmitting through the light valve 1.
5 can be illuminated, and the amount of light illuminating the light valve 15 can be significantly improved. Therefore, even when the same light source 1 is used, a remarkable effect that a high-luminance image can be obtained as a projection image can be obtained.

Further, if the reflection mirror layer 5b and the quarter-wave plate layer 5c are formed on the second lens plate 3 as in this embodiment, a partial reflection mirror member is separately provided as in the first embodiment. 5 is not required, and the number of parts can be reduced.

[0098] In each embodiment of the present invention,
The transmitted light of each color light produced by the three-color separation optical system which is incident on the polarization beam splitter for each color constituting the projection device is first made incident on the light valve, and the reflected polarized light is introduced into the reflection mirror according to the present invention. However, it is needless to say that each light reflected by the polarization beam splitter may be first introduced into the light valve, and the reflection mirror may be arranged at a position where the light is transmitted.

Further, 1 provided on the reflection mirror layer 5b
The 波長 wavelength plate layer 5c may be provided by attaching a cutout having the same shape to the reflection mirror layer 5b having a predetermined shape, but may be formed on the reflection mirror layer 5b by an oblique evaporation method or the like. . In this case, aluminum or the like may be formed in a predetermined shape by mask vapor deposition as the reflection mirror layer 5b, and a titanium dioxide (TiO2) layer or the like may be formed thereon with a predetermined thickness by oblique vapor deposition. If it is prepared, it can be formed on the reflection mirror layer 5b with high accuracy. Even in the case of this method, it goes without saying that the fast axis as the quarter-wave plate layer 5c can be formed in a predetermined direction by controlling the tilt direction of the substrate during film formation.

[0100]

As described above, according to the inventions described in the claims, the conventionally discarded second polarized light is converted into the first polarized light and is incident on the light valve to contribute to illumination. And high-brightness illumination can be achieved by being superimposed on the first polarized light that is the light source light originally incident on the polarization splitting means and passes through the polarization splitting means and illuminates the light valve, Even if the same light source as in the related art is used, it is possible to achieve a great effect that high brightness of a projected image can be achieved. Further, in the present invention, since a so-called fly-eye integrator using the first lens plate and the second lens plate is used, the first lens plate is used.
The luminous flux split by the individual apertures of the lenses of the lens plate is superimposed on the light valve by the lens of the second lens plate, so that an effect of achieving uniform illumination can be achieved.

If the reflection mirror layer and the quarter-wave plate layer are formed on the second lens plate as in the invention described in claim 2 or the like, it is not necessary to separately prepare a partial reflection mirror member.
The number of parts can be reduced.

According to the invention described in claim 7 or the like, by employing an illumination device having the above-mentioned effects in a projection device, not only a high-luminance color projection image can be obtained, but also a so-called fly Since a configuration employing an eye integrator is the basis of the present invention, a projection image with uniform brightness can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a projection device according to Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram showing an illumination optical system for a light valve of the projection device according to the first embodiment.

FIG. 3 is a perspective view of a first lens plate used in the projection device according to the first embodiment.

FIG. 4 is a view showing a partial mirror member used in the projection device according to the first embodiment, (a) is a front view, and (b) is (a).
FIG.

5 is a diagram showing the first embodiment, and in the illumination optical system shown in FIG. 2, a light valve and a reflection of a light beam passing through the center and the outermost of light beams incident on each lens of the first lens plate. FIG. 4 is a ray diagram illustrating illumination of a mirror.

6 is a view showing the first embodiment, and is a reflection mirror and a partial reflection mirror member for the three light rays incident on a lens located just above the center line of the first lens plate in the illumination optical system shown in FIG. 2; FIG. 3 is a ray diagram illustrating a state in which a light valve is illuminated via a light source.

FIG. 7 is a view showing the first embodiment, and a reflecting mirror member for the three light rays incident on the lowermost lens of the first lens plate in the drawing in the illumination optical system shown in FIG. 2; FIG. 4 is a ray diagram illustrating a state in which a light valve is illuminated via a partially reflecting mirror member.

FIG. 8 is a front view of a partially reflecting mirror member used in a projection device according to a second embodiment of the present invention.

FIG. 9 is a perspective view of a first lens plate showing the second embodiment.

FIG. 10 is a front view of a partially reflecting mirror member used in a projection device according to a third embodiment of the present invention.

FIG. 11 is a perspective view of a first lens plate showing the third embodiment.

FIG. 12 is a perspective view of a second lens plate provided with a reflection mirror layer according to the fourth embodiment of the present invention.

FIG. 13 is a schematic diagram showing an illumination optical system for a light valve of a projection device according to the fourth embodiment.

FIG. 14 is an explanatory diagram showing a conventional projection device.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 light source 2 first lens plate 2a lens 3 second lens plate 3a lens 4 fly-eye integrator 5 partially reflecting mirror member 5a transparent glass plate 5b reflecting mirror layer 5c quarter-wave plate layer 5d mirror-layer-free portion 6 field lens 8 R light / G light reflecting dichroic mirror 9 B light reflecting dichroic mirror 10,13 Bending mirror 11,11B, 11R, 11G Field lens 12,12R, 12G, 12B Polarizing beam splitter (polarization separating means, analyzing means) 14 G Light reflective dichroic mirror 15,15R, 15G, 15B Reflective light valve 16,16R, 16G, 16B Reflective mirror 18 Cross dichroic prism 19 Projection lens (projection optical system)

Claims (9)

[Claims] 1. A light source for emitting randomly polarized light, a so-called fly-eye integrator comprising a first lens plate having a plurality of lenses in a plane and a second lens plate having a plurality of lenses in a plane. Decomposing the light emitted from the light source into light fluxes determined by the apertures of each lens of the first lens plate, condensing each light beam on each lens of the second lens plate, In the illumination device for a projection device that illuminates the emitted light by superimposing it on a light valve, a reflection mirror layer and a quarter-wave plate layer are partially formed on the reflection mirror layer in the vicinity of the second lens plate. The light reflected from the light source is transmitted through a portion of the partial reflection mirror member where no mirror layer is formed, and is emitted. The emitted light has vibrations in directions perpendicular to each other. There is provided a polarization separating unit that separates the polarized light into the first and second polarized lights and emits the polarized light in different directions. The polarized light separating unit has a first polarized light emitting surface of the polarized light separating unit near the light valve as the illuminated object. Further, a reflection mirror is arranged in the vicinity of the second polarized light exit surface of the polarized light separating means so that the mirror surface is perpendicular to the optical axis, and the second polarized light emitted from the polarized light separating means is The light is reflected by the reflection mirror, travels through the polarization splitting means, enters the reflection mirror layer of the partial reflection mirror member disposed near the second lens plate, is reflected and reflected by the １ ／ wavelength plate layer. An illumination device for a projection device, wherein the reflected light is converted into a first polarized light, and the reflected light is incident on the polarization splitting means again, and illuminates the light valve through the polarization splitting means. 2. A light source for emitting randomly polarized light, and a so-called fly-eye integrator comprising a first lens plate having a plurality of lenses in a plane and a second lens plate having a plurality of lenses in a plane. Decomposing the light emitted from the light source into light fluxes determined by the apertures of each lens of the first lens plate, condensing each light beam on each lens of the second lens plate, The illumination device for a projection device that illuminates the emitted light by superimposing it on a light valve, wherein a reflection mirror layer is partially formed on the second lens plate, and a １ ／ wavelength plate layer is formed on the reflection mirror layer. The emitted light from the light source is transmitted through the portion where the mirror layer is not formed, and is emitted. The emitted light is polarized and separated into first and second polarized lights having vibrations in directions perpendicular to each other. Fire in different directions A first polarized light exit surface of the polarized light separating unit is disposed near the light valve serving as the object to be illuminated; and a second polarized light exit surface of the polarized light separating unit is disposed near the second polarized light exit surface. A reflection mirror is arranged so that the mirror surface is perpendicular to the optical axis. The second polarized light emitted from the polarization splitting means is reflected by the reflection mirror and travels, and the polarization splitting means Incident on the reflection mirror layer on the second lens plate via
The reflected light is converted into the first polarized light by the quarter-wave plate layer, and the reflected light is incident again on the polarized light separating means, and illuminates the light valve through the polarized light separating means. . 3. An illumination device for a projection device according to claim 1, wherein a plurality of field lenses are arranged between said second lens plate and said polarization separation means. 4. A polarization splitting means of a light beam determined by an opening of each lens of the first lens plate and passing through a central portion of the opening and parallel to an optical axis. The second polarized light beam polarized and separated by the reflecting mirror is reflected by the reflecting mirror, is incident on the reflecting mirror layer, and is kept parallel to the optical axis in the reflecting mirror layer portion at the time of reflection. The projection device illumination device according to any one of claims 1 to 3, wherein 5. The arrangement of the reflection mirror layer and the portion where the mirror layer is not formed is such that the center position of the reflection mirror layer and the center position of the portion where the mirror layer is not formed are symmetrical with respect to a predetermined straight line. The illumination device for a projection device according to claim 1, wherein the illumination device is set. 6. The reflection mirror layer and the quarter-wave plate layer,
The illumination device for a projection device according to claim 1, wherein the illumination device is provided at a position corresponding to a boundary portion between the lenses of the second lens plate. 7. An illuminating device, a light valve as a modulating means for modulating illuminating light from the illuminating device according to image information and emitting the light as light containing the modulated light, and emitting light from the light valve. In a projection apparatus having a light analyzing unit for detecting light and a projection optical system for projecting the detected light, the illuminating device includes: a light source that emits randomly polarized light; and a first lens plate having a plurality of lenses in a planar shape. And a so-called fly-eye integrator including a second lens plate having a plurality of lenses in a planar shape, and decomposes the emitted light from the light source into a light flux determined by the aperture of each lens of the first lens plate. In a lighting device for a projection device, each light beam is condensed on each lens of the second lens plate, and light emitted from the second lens plate is superimposed on a light valve for illumination. In the vicinity of the second lens plate, there is disposed a reflection mirror layer and a partial reflection mirror member in which a quarter-wave plate layer is formed on the reflection mirror layer. Polarization splitting means for splitting the emitted light into first and second polarized lights having vibrations in directions perpendicular to each other and transmitting in different directions, and transmitting the emitted light in a direction not perpendicular to the mirror layer; The polarized light separating means is arranged such that a first polarized light emitting surface of the polarized light separating means is disposed near the light valve as the object to be illuminated, and a reflection light is disposed near the second polarized light emitting surface of the polarized light separating means. The mirror is arranged so that the mirror surface is perpendicular to the optical axis, and the second polarized light emitted from the polarization splitting means is reflected by the reflection mirror and travels, and passes through the polarization splitting means. Second lens plate The incident light is incident on and reflected by the reflection mirror layer of the partial reflection mirror member arranged beside, and is converted into the first polarized light by the 波長 wavelength plate layer, and the reflected light is incident again on the polarization separation means and passes through the polarization separation means. A projection apparatus, wherein the projection apparatus is set to illuminate a light valve, and wherein the polarization separation unit and the analysis unit are the same polarization beam splitter. 8. An illuminating device, a light valve as modulation means for modulating illuminating light from the illuminating device according to image information, and emitting the light as light containing the modulated light, and emitting light from the light valve. In a projection apparatus having a light analyzing unit for detecting light and a projection optical system for projecting the detected light, the illuminating device includes: a light source that emits randomly polarized light; and a first lens plate having a plurality of lenses in a planar shape. And a so-called fly-eye integrator including a second lens plate having a plurality of lenses in a planar shape, and decomposes the emitted light from the light source into a light flux determined by the aperture of each lens of the first lens plate. In a lighting device for a projection device, each light beam is condensed on each lens of the second lens plate, and the light emitted from the second lens plate is illuminated by being superimposed on a light valve. A reflection mirror layer is formed on a part of the second lens plate, and a 板 wavelength plate layer is formed on the reflection mirror layer. The light emitted from the light source passes through the portion where the mirror layer is not formed. Polarization splitting means for splitting the emitted light into first and second polarized lights having vibrations in directions perpendicular to each other, and emitting the light in different directions. A first polarized light emitting surface of the polarized light separating means is disposed near a light valve as an object to be illuminated, and a reflecting mirror is perpendicular to an optical axis near a second polarized light emitting surface of the polarized light separating means. The second polarized light emitted from the polarization splitting means is reflected by the reflection mirror and travels, and passes through the polarization splitting means to the reflection mirror layer on the second lens plate. incident,
The reflected light is converted into the first polarized light by the quarter-wave plate layer, and the reflected light is again incident on the polarization separation means, and is set so as to illuminate the light valve through the polarization separation means. The projection device, wherein the means and the analyzing means are the same polarization beam splitter. 9. The illuminating device according to claim 1, wherein a plurality of field lenses are disposed between the second lens plate and the polarization splitting means, and a light flux determined by an opening of each lens of the first lens plate. A light beam passing through the central portion of the aperture, and among the light beams parallel to the optical axis, the light beam of the second polarization separated by the polarization separating means is reflected by the reflection mirror, and At the time of incidence and reflection on the mirror layer, the reflection mirror layer portion is set so as to be maintained parallel to the optical axis, and the polarization splitting means and the analyzing means are the same polarization beam splitter. 9. The projection device according to claim 7, wherein: