JP4232586B2 - Optical device manufacturing apparatus and manufacturing method thereof - Google Patents

Description

The present invention, apparatus for producing an optical device, and relates to its production how.

Conventionally, three light modulators (liquid crystal panels) that modulate three color lights of R, G, and B according to image information for each color light, and these light modulators are attached to synthesize three modulated light beams A projector is known that includes an optical device including a color combining optical device (cross dichroic prism) that forms image light and a projection lens that magnifies and projects the formed optical image.
In such a projector, each liquid crystal panel must be at the back focus position of the projection lens. In addition, in order to obtain a clearer image, it is necessary to prevent occurrence of pixel shift between liquid crystal panels and shift in distance from the projection lens.

For this reason, at the time of manufacturing the projector, focus adjustment for accurately disposing each liquid crystal panel at the back focus position of the projection lens and alignment adjustment for matching the pixels of each liquid crystal panel are performed with high accuracy. An optical apparatus manufacturing apparatus that performs such adjustment to manufacture an optical apparatus is known (see, for example, Patent Document 1).
In this optical device manufacturing apparatus, based on the light source device that introduces a light beam into the liquid crystal panel, the light beam detection device that detects the light beam through the liquid crystal panel and the cross dichroic prism, and the light beam detected by the light beam detection device, And a position adjusting device for adjusting the focus and alignment of the liquid crystal panel.
Among these, the position adjusting device is composed of three according to three liquid crystal panels, and adjusts the position of each liquid crystal panel to the optimum position with respect to the cross dichroic prism.

Japanese Patent Laying-Open No. 2003-107395 (FIG. 5)

  However, since the manufacturing apparatus described in Patent Document 1 requires three position adjusting devices corresponding to the three liquid crystal panels, the entire manufacturing apparatus becomes large and it is difficult to reduce the size of the manufacturing apparatus. In addition, since it is necessary to manufacture three position adjusting devices, it is difficult to reduce the manufacturing cost when manufacturing the manufacturing device.

An object of the present invention, apparatus for producing an optical device downsizing and cost reduction, and to provide a manufacturing how.

  The optical device manufacturing apparatus according to the present invention includes a plurality of light modulation devices that modulate a plurality of color lights according to image information for each color light, a plurality of light flux incident end faces to which the light modulation devices are attached, and light flux incidence end faces. An optical apparatus manufacturing apparatus for manufacturing an optical apparatus including a color combining optical apparatus having a light beam emission end face that combines and emits incident color lights, and introduces a position adjusting light beam to the light modulation device Light source device for adjustment, light beam detection device for detecting image light emitted from the light beam emission end face via the light modulation device and the color synthesis optical device, and a holding unit for holding the color synthesis optical device at a predetermined position And holding any one of the plurality of light modulation devices, and adjusting the position of the light modulation device with respect to the color combining optical device based on the image light detected by the light beam detection device You A position adjusting unit, and the holding unit rotates so that a predetermined light beam incident end surface of the plurality of light beam incident end surfaces of the color synthesizing optical device faces the light modulation device held by the position adjusting unit. It is configured to be movable.

Here, as the light beam detection device, for example, an image sensor such as a charge coupled device (CCD) or a metal oxide semiconductor (MOS) sensor can be employed.
According to the present invention, the holding unit holds the color combining optical device and is configured to be able to rotate the color combining optical device. The light beam incident end face can be made to face the light modulation device held by the position adjusting unit. Therefore, it is not necessary to provide three position adjusting parts as in the prior art, and only one position adjusting part can be configured, and the manufacturing apparatus can be downsized.
Further, since the manufacturing apparatus can be configured with only one position adjusting unit, the manufacturing cost can be reduced when manufacturing the manufacturing apparatus.
Therefore, the manufacturing apparatus can be reduced in size and cost, and the object of the present invention can be achieved.

The manufacturing apparatus of the present invention includes a plurality of light modulation devices that modulate a plurality of color lights according to image information for each color light, a color combining optical device that combines each color light modulated by each light modulation device, An optical device manufacturing apparatus for manufacturing an optical device having an illumination optical axis and comprising a support for supporting the light modulation device and the color synthesizing optical device at a predetermined position with respect to the illumination optical axis, wherein the light modulation An adjustment light source device for introducing a light beam for position adjustment into the device, a light beam detection device for detecting image light via the light modulation device and the color synthesis optical device, and the color synthesis optical device supported A holding unit that holds the support in a predetermined position, and holds the light modulation device of any of the plurality of light modulation devices. Based on the image light detected by the light beam detection device, Supported color composition optical apparatus A position adjusting unit that adjusts the position of the light modulation device with respect to the optical path forming surface formed by the illumination optical axis set on the support when the support is held. The support body is configured to be rotatable about an orthogonal axis, and is configured to be movable along the optical path forming surface.
Here, as the light flux detection device, an image pickup device such as a CCD or MOS sensor can be adopted as in the manufacturing device described above.
Further, as the color synthesizing optical apparatus, a configuration in which a plurality of color separation means that reflect color light in a predetermined wavelength range and transmit a light flux in other wavelength ranges is combined integrally, or a plurality of color separation means are provided in a plurality of colors. A configuration or the like that is arranged at a position corresponding to the light beam emitted from the light modulation device can be employed.
In the present invention, the holding unit is configured to hold the support that supports the color synthesis optical device and to be rotatable about an axis that is orthogonal to the optical path forming surface. For example, when a plurality of color separation means are integrated as a color synthesis optical device, a plurality of color synthesis optical devices supported by a support body can be designed by designing a manufacturing apparatus in consideration of the position of the shaft. Among the light beam incident positions, a predetermined light beam incident position can be made to face the light modulation device held by the position adjusting unit. Therefore, similarly to the manufacturing apparatus described above, the manufacturing apparatus can be reduced in size and cost.
Further, the holding part is configured to be able to move the support along the optical path forming surface. For example, when an optical device adopts a reflection type light modulation device that modulates color light according to image information by reflection, or when a reflection type polarizing plate is adopted at the subsequent stage of the light modulation device, that is, Even in a configuration in which the light modulation device is spaced apart from the color synthesis optical device, the light modulation device held by the position adjustment unit is moved to a predetermined position of the support by rotating and / or moving the holding unit. Can be placed. Therefore, in addition to the optical device in which the light modulation device is fixed with respect to the color synthesis optical device, it is manufactured in accordance with various optical devices such as an optical device in which the light modulation device is spaced from the color synthesis optical device. Can be implemented.

In the optical device manufacturing apparatus of the present invention, the holding unit holds the color synthesizing optical device or the support in a predetermined position, and the light beam detection device on a light beam emission side of the color synthesizing optical device or the support. Is preferably maintained.
Here, for example, in a configuration in which the holding unit does not hold the light beam detection device, the light beam detection device is placed at a plurality of positions where the light beam emission side of the color synthesis optical device or the support is arranged when the color synthesis optical device or the support is rotated. It is necessary to provide it. Further, in the configuration in which the light beam detection devices are provided at a plurality of positions, it is necessary that the positioning accuracy when rotating the holding portion is high.
In the present invention, since the holding unit also holds the light beam detection device, the light beam detection device also rotates as the color synthesis optical device or the support rotates. Therefore, it is not necessary to provide a light beam detection device at each of the plurality of positions where the light beam emission side of the color synthesis optical device or the support is rotated, and the manufacturing apparatus is further reduced in size and cost. Can be planned. In addition, the positioning accuracy when the holding portion is rotated can be increased.

The optical device manufacturing apparatus of the present invention preferably includes a light beam switching unit that switches the light beam emitted from the adjustment light source device to color light corresponding to the light modulation device held by the position adjustment unit. .
Here, as the adjustment light source device, for example, a discharge light-emitting lamp such as a metal halide lamp, a self-light-emitting element (such as a light-emitting diode), or the like can be employed.
Further, as the light beam switching unit, for example, when the above-described discharge light-emitting lamp is employed as the adjustment light source device, a plurality of color filters that convert a light beam emitted from the discharge light-emitting lamp into specific color light, and this color A device having a moving mechanism for moving the filter can be employed. In addition, when a plurality of light emitting diodes having different semiconductor materials and additives and different colors are used as the adjustment light source device, for example, any one of the plurality of light emitting diodes is used. A device for turning on the light, a device for moving the plurality of light emitting diodes, and switching the color light to be emitted can be employed. In addition, a configuration such as a color separation mirror is also possible.
According to the present invention, since the manufacturing apparatus includes the light beam switching unit, the position of the light modulation device can be adjusted using the color light corresponding to the light modulation device, and the position adjustment of the light modulation device can be performed with high accuracy. Can be implemented.

In the optical device according to the aspect of the invention, the position adjusting unit may include a feed position to which any one of the plurality of light modulation devices is fed and a position of the light modulation device with respect to the color synthesis optical device. It is preferably configured to be rotatable between adjustment positions for adjusting the position.
According to the present invention, since the position adjustment unit is configured to be rotatable between the supply position and the adjustment position, the position adjustment unit is optically modulated by rotating the position adjustment unit to the supply position. Equipment can be supplied easily. Therefore, it is possible to facilitate the material supply operation to the position adjusting unit and to easily and quickly manufacture the optical device.

In the optical device manufacturing apparatus of the present invention, a light modulation device supply unit that holds the plurality of light modulation devices in the position adjustment unit so as to be supplied to the position adjustment unit is provided at the supply position. It is preferable that the material portion is configured to be able to move any one of the plurality of light modulation devices to the material supply position.
According to the present invention, since the manufacturing apparatus includes the light modulation device supply portion, the supply of the light modulation device to the position adjustment portion can be more easily performed. In addition, compared to the case where the worker directly feeds the light modulation device to the position adjustment unit, the light modulation device can be fed to the position adjustment unit accurately, and the position adjustment unit can adjust the position of the light modulation device with high accuracy. Can be implemented.

The optical device manufacturing apparatus of the present invention includes a control unit that drives and controls the position adjustment unit, and the control unit captures an image detected by the light beam detection device and converts the image into an image signal. An image processing unit that performs image processing based on the image signal output from the image capturing unit, and determines an optimum posture position of the light modulation device based on the processing result; and the image processing unit It is preferable to include a drive control unit that drives and controls the position adjustment unit based on the determined optimum posture position.
Here, for example, a PC (Personal Computer) including a CPU (Central Processing Unit) that reads and executes a control program can be employed as the control unit. Further, as the image capturing unit, a video capture board or the like that receives a signal output from the light beam detecting device and converts it into an image signal for PC can be employed. Furthermore, as the image processing unit, an arithmetic processing unit configured by a CPU or the like inside the PC can be employed.
In addition to driving and controlling the position adjustment unit, the control unit adopts a configuration that drives and controls the adjustment light source device, the light beam detection device, the holding unit, the light beam switching unit, and the light modulation device feeding unit. Also good.

  According to the present invention, the manufacturing apparatus includes the control unit, and the control unit includes the image capturing unit, the image processing unit, and the drive control unit. Therefore, the image capturing unit is detected by the light beam detection device. The captured image is captured and converted into an image signal to detect the image. Further, the image processing unit performs image processing based on the image signal captured through the image capturing unit, and determines the optimum posture position of the light modulation device. Then, the drive control unit drives and controls the position adjusting unit based on the determined posture optimum position. Therefore, in the position adjustment of the light modulation device, the detected image is visually confirmed, and the ambiguity of the adjustment accuracy is eliminated compared with the configuration in which the position adjustment unit is manually adjusted, and the light modulation device is colored. It can be adjusted to an optimum position with respect to the synthesis optical device, and the optical device can be manufactured with high accuracy.

The optical device manufacturing apparatus of the present invention includes a position storage unit that stores an optimum posture position of the light modulation device determined by the image processing unit, and the control unit includes the plurality of light modulation devices. The posture stored in the position storage unit when the position adjustment unit performs position adjustment of one light modulation device and then performs position adjustment of another light modulation device among the plurality of light modulation devices. The position adjustment unit is driven and controlled to move the other light modulation device based on the optimum position, and the image processing unit calculates a luminance value from the processed image, and based on the luminance value, the boundary of the image It is preferable to acquire a point and determine the optimum posture position of the other light modulation device based on the acquired boundary point.
In the present invention, the manufacturing apparatus includes a position storage unit, and the position storage unit stores the optimum posture position determined by the image processing unit. The control unit drives and controls the position adjustment unit based on the optimum posture position stored in the position storage unit when performing position adjustment of the other light modulation device among the plurality of light modulation devices. Move the light modulator. As a result, if the other light modulation device is moved by an amount corresponding to, for example, axial chromatic aberration in the other light modulation device with respect to the optimum posture position of one light modulation device among the plurality of light modulation devices. The optimum posture position of the other light modulation device can be quickly determined.

  The image processing unit calculates a luminance value from the processed image, acquires an image boundary point based on the luminance value, and determines an optimum posture position of another light modulation device based on the acquired boundary point To do. For example, the obtained separation distance between the boundary points is compared with a reference separation distance as a reference, and a deviation amount of the separation distance between the boundary points with respect to the reference separation distance is calculated. Then, another light modulation device is moved based on the amount of deviation. Thus, for example, the optimum posture position of the light modulation device can be determined quickly and with simple arithmetic processing, compared to a configuration in which the position of the light modulation device is adjusted based on the contrast distribution of the image.

The method of manufacturing an optical device according to the present invention includes a plurality of light modulation devices that modulate a plurality of color lights according to image information for each color light, a plurality of light flux incident end faces to which each light modulation device is attached, and light flux incidence end faces. A method for manufacturing an optical device comprising a color combining optical device having a light beam emission end face for combining and emitting incident color lights, wherein the color combining optical device is installed at a predetermined position. An installation step; a light modulation device holding step of holding any one of the plurality of light modulation devices in a position adjustment unit; and the light modulation among a plurality of light flux incident end faces of the color synthesis optical device. A color synthesizing optical device rotating step of rotating the color synthesizing optical device so that a light beam incident end face corresponding to the light modulating device held in the device holding step faces the light modulating device; and for A light beam introducing step of introducing a light beam for position adjustment, an image light detecting step of causing the light beam detecting device to detect image light emitted from the light beam emitting end surface via the light modulation device and the color combining optical device, A light modulation device position adjustment step of adjusting the position of the light modulation device with respect to the color combining optical device using the position adjustment unit based on the image light detected in the image light detection step. Features.
Here, the method for manufacturing an optical device of the present invention can be executed using, for example, the above-described device for manufacturing an optical device.
According to the present invention, an optical device manufacturing method includes a color synthesis optical device installation step, a light modulation device holding step, a color synthesis optical device rotation step, a light beam introduction step, an image light detection step, and a light modulation. An apparatus position adjusting step, and in the color synthesizing optical device rotating step, the color synthesizing optical device is rotated, so that the same operational effects as those of the optical device manufacturing apparatus described above can be obtained.

A method of manufacturing an optical device according to the present invention includes a plurality of light modulation devices that modulate a plurality of color lights according to image information for each color light, and a color combining optical device that combines each color light modulated by each light modulation device. A method of manufacturing an optical device, wherein a predetermined illumination optical axis is set, and an optical device is manufactured comprising a support that supports the light modulation device and the color synthesizing optical device at a predetermined position with respect to the illumination optical axis, A support body installation step of installing the support body supporting the color synthesizing optical device at a predetermined position, and a light modulation device holding step of holding any one of the plurality of light modulation devices in a position adjustment unit; And a support moving step of rotating the support around an axis orthogonal to an optical path forming surface formed by the illumination optical axis and / or moving the support along the optical path forming surface; For the light modulator Detected by the light beam introducing step of introducing a light beam for position adjustment, the image light detecting step of causing the light beam detecting device to detect the image light via the light modulation device and the color combining optical device, and the image light detecting step. A light modulation device position adjustment step of adjusting the position of the light modulation device with respect to the color synthesis optical device supported by the support using the position adjustment unit based on the image light. And
Here, the method for manufacturing an optical device of the present invention can be executed using, for example, the above-described device for manufacturing an optical device.
According to the present invention, a method for manufacturing an optical device includes a support installation step, a light modulation device holding step, a support moving step, a light beam introduction step, an image light detection step, and a light modulation device position adjustment step. In the support moving process, the support is rotated and moved along the optical path forming surface, so that the same operational effects as those of the optical device manufacturing apparatus described above can be enjoyed.

In the method of manufacturing an optical device according to the aspect of the invention, it is preferable that the light beam introduction step includes a light beam switching procedure for switching to color light corresponding to the light modulation device held in the light modulation device holding step.
According to the present invention, since the light beam introduction step includes a light beam switching procedure, in the light modulation device position adjustment step, the position of the light modulation device can be adjusted using colored light according to the light modulation device, The position adjustment of the modulator can be performed with high accuracy.

In the method of manufacturing an optical device according to the aspect of the invention, the position adjusting unit may include a supply position to which any one of the plurality of light modulation devices is supplied, and the light with respect to the color synthesis optical device. It is configured to be rotatable between adjustment positions for adjusting the position of the modulation device, and the light modulation device holding step rotates to a position adjustment unit rotation procedure for rotating the position adjustment unit, and to the supply position. It is preferable that the position adjusting unit includes a light modulation device holding procedure for holding any one of the plurality of light modulation devices.
According to the present invention, since the light modulation device holding step includes a position adjustment unit rotation procedure and a light modulation device holding procedure, the position adjustment unit is rotated to the feed position in the position adjustment unit rotation procedure. Thus, in the light modulation device holding procedure, the light modulation device can be easily supplied to the position adjusting unit. Therefore, it is possible to facilitate the material supply operation to the position adjusting unit and to easily and quickly manufacture the optical device.

In the method for manufacturing an optical device according to the aspect of the invention, the plurality of light modulation devices are held at the supply position so as to be fed to the position adjustment unit, and the light modulation of any one of the plurality of light modulation devices is performed. An optical modulation device supply unit configured to be able to move the apparatus to the supply position is provided, and the light modulation device holding step moves the light modulation device supply unit, and includes the plurality of light modulation devices. It is preferable that a feeding part moving procedure for positioning any one of the light modulation devices at the feeding position is provided.
According to the present invention, since the light modulation device holding step includes a material supply unit moving procedure, the light modulation device is moved to the position adjusting unit by moving the light modulation device material supply unit in the material supply unit moving procedure. Can be supplied. Therefore, it is possible to easily and accurately supply the light modulation device to the position adjustment unit as compared with the case where the worker directly supplies the light modulation device to the position adjustment unit.

In the optical device manufacturing method of the present invention, the position adjustment unit is driven and controlled by a drive unit that drives the position adjustment unit and a control unit that controls the drive unit, and the light modulation device position adjustment step includes: An image capturing procedure in which the control unit captures the image light detected in the light beam detection step and converts the image light into an image signal, and the control unit performs image processing based on the image signal converted in the image capturing procedure. An image processing procedure for determining the optimum posture position of the light modulation device based on the processed result, and the control unit controls the driving unit based on the optimum posture position determined in the image processing procedure And a position adjusting procedure for adjusting the position of the light modulation device with respect to the color synthesizing optical device by driving the position adjusting unit.
Here, as the control unit and the light beam detection device, those similar to the control unit and the light beam detection device of the manufacturing apparatus described above can be adopted, and each procedure in the light modulation device position adjustment step can be executed by this control unit. Is possible. Each procedure in the light modulation device position adjustment step can also be configured as a program for causing the control unit to execute.

According to the present invention, since the position adjustment of the light modulation device is performed by the drive control of the position adjustment unit by the control unit in the light modulation device position adjustment step, the position of the light modulation device is manually adjusted visually. Compared to the case, the position of the light modulation device can be adjusted accurately, and an optical device in which each light modulation device is at the optimum position can be manufactured.
In addition, for example, the control unit performs drive control of the position adjustment unit, the drive control of the light source device for adjustment described above, the drive control of the light beam detection device described above, the drive control of the holding unit described above, and the light beam switching unit described above And the above-described drive control of the light modulation device feeding portion, the light modulation device holding step, the color synthesizing optical device rotation step, the support moving step, the light beam introduction step, and the image light The detection step, the light modulation device position adjustment step, and the like can be executed by the control unit. That is, almost all of the manufacturing method of the optical device can be executed by the control unit, and the optical device can be manufactured easily and quickly without causing the operator to perform complicated operations.

In the method of manufacturing an optical device according to the aspect of the invention, the light modulation device position adjustment step is determined by the image processing procedure after performing position adjustment of one of the plurality of light modulation devices. A position storage procedure for storing the optimum posture position of the light modulation device by the control unit is stored, and the position storage procedure stores the position adjustment of another light modulation device among the plurality of light modulation devices. The control unit controls the drive unit based on the optimal posture position to drive the position adjustment unit to move the other light modulation device, and the image processing procedure calculates a luminance value from the processed image. It is preferable to calculate, acquire a boundary point of the image based on the luminance value, and determine an optimum posture position of the other light modulation device based on the acquired boundary point.
In the present invention, the light modulation device position adjustment step includes a position storage procedure, and when the position adjustment of another light modulation device among the plurality of light modulation devices is performed, the posture optimum position stored in the position storage procedure is set. Based on this, the other light modulation device is moved. Further, the image processing procedure calculates a luminance value from the processed image, acquires a boundary point of the image based on the luminance value, and determines an optimum posture position of another light modulation device based on the acquired boundary point To do. This makes it possible to enjoy the same operational effects as those of the optical device manufacturing apparatus described above.

[1. First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
[1-1. Projector structure)
FIG. 1 is a diagram illustrating a structure of a projector 100 including an optical device to be manufactured.
The projector 100 includes an integrator illumination optical system 110, a color separation optical device 120, a relay optical system 130, an optical device 180 including a light modulation device 140 and a cross dichroic prism 150 as a color synthesis optical device, and a projection lens 160. With.

  The integrator illumination optical system 110 includes a light source device 111 including a light source lamp 111A and a reflector 111B, a first lens array 113, a second lens array 115, a reflection mirror 117, a polarization conversion element 118, and a superimposing lens 119. Prepare. The light beam emitted from the light source lamp 111A is aligned in the emission direction by the reflector 111B, divided into a plurality of partial light beams by the first lens array 113, the emission direction is bent by 90 ° by the reflection mirror 117, and then the second lens. An image is formed in the vicinity of the array 115. Each partial light beam emitted from the second lens array 115 is incident so that its central axis (principal ray) is perpendicular to the incident surface of the polarization conversion element 118 in the subsequent stage. It is emitted as linearly polarized light. A plurality of partial light beams emitted from the polarization conversion element 118 as linearly polarized light and passed through the superimposing lens 119 are superimposed on three liquid crystal panels (to be described later) constituting the light modulation device 140.

The color separation optical device 120 includes two dichroic mirrors 121 and 122 and a reflection mirror 123. The dichroic mirrors 121 and 122 and the reflection mirror 123 receive a plurality of partial light beams emitted from the integrator illumination optical system 110. It has the function of separating into three color lights of red, green and blue.
The relay optical system 130 includes an incident side lens 131, a relay lens 133, and reflection mirrors 135 and 137, and color light separated by the color separation optical device 120, for example, blue light, is described later as a liquid crystal panel for blue light. Has the function of leading up to
The optical device 180 includes three incident-side polarizing plates 171, three light modulation devices 140 and three emission-side polarizing plates 172 disposed at the subsequent stage of the incident-side polarizing plate 171, and a cross dichroic prism 150. Among these, the light modulation device 140, the emission side polarizing plate 172, and the cross dichroic prism 150 are integrated to form an optical device body 180A. The detailed configuration of the optical device main body 180A will be described later.
The incident-side polarizing plate 171 transmits only polarized light in a certain direction out of each color light separated by the color separation optical device 120 and absorbs other light beams. A polarizing film is attached to a substrate such as quartz. It is a thing.
The exit-side polarizing plate 172 has a structure substantially similar to that of the incident-side polarizing plate 171 and is attached to the light beam incident end surface of the cross dichroic prism 150 so as to be substantially orthogonal to the polarization axis of the incident-side polarizing plate 171.

  The light modulation device 140 includes three liquid crystal panels 141R, 141G, and 141B (the liquid crystal panel for red light is 141R, the liquid crystal panel for green light is 141G, and the liquid crystal panel for blue light is 141B). For example, a polysilicon TFT is used as a switching element. Each color light separated by the color separation optical device 120 is divided into three incident-side polarizing plates 171, three liquid crystal panels 141 R, 141 G, 141 B, and 3. The two exit-side polarizing plates 172 are modulated according to image information to form an optical image.

The cross dichroic prism 150 synthesizes images modulated for each color light emitted from the three exit-side polarizing plates 172 to form a color image. In the cross dichroic prism 150, a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a substantially X shape along the interface of four right-angle prisms. Three color lights are synthesized by the dielectric multilayer film.
Although not shown, the projection lens 160 is configured as a combined lens in which a plurality of small lenses are combined, and enlarges and projects the color image synthesized by the cross dichroic prism 150 on the screen.

[1-2. Structure of optical device body]
FIG. 2 is an exploded perspective view showing the structure of the optical device main body 180A. Note that FIG. 2 is an exploded view of only the side on which the B color light is incident among the three color lights of R, G, and B in order to simplify the description. The same applies to the side on which the R and G color lights are incident.
As shown in FIG. 2, the three exit-side polarizing plates 172 are attached to the light beam incident end surfaces 151 of the cross dichroic prism 150. Further, the three liquid crystal panels 141R, 141G, and 141B constituting the light modulation device 140 are disposed so as to surround the three light flux incident end surfaces 151 of the cross dichroic prism 150, as shown in FIG.
Specifically, each of the liquid crystal panels 141R, 141G, and 141B is housed in a holding frame 143, and transparent resin pins 145 are inserted into the holes 143A formed at the four corners of the holding frame 143 together with an ultraviolet curable adhesive. As a result, the light flux incident end surface 151 of the cross dichroic prism 150 is bonded and fixed. Here, a rectangular opening 143B is formed in the holding frame 143, and the liquid crystal panels 141R, 141G, and 141B are exposed through the opening 143B, and this portion becomes an image forming area. That is, each color light R, G, B is introduced into this portion of each liquid crystal panel 141R, 141G, 141B, and an optical image is formed according to image information.

  In the optical device main body 180A employing such a structure, when the liquid crystal panels 141R, 141G, and 141B are bonded and fixed to the cross dichroic prism 150, the focus adjustment, alignment adjustment, and fixing of the liquid crystal panels 141R, 141G, and 141B are performed. Must be performed at approximately the same time, so it is usually assembled by the following procedure.

(1) A first liquid crystal panel, for example, a liquid crystal panel 141G is bonded and fixed to the cross dichroic prism 150. Specifically, first, a pin 145 whose tip is coated with an ultraviolet curable adhesive is inserted into the hole 143A of the holding frame 143 of the liquid crystal panel 141G.
(2) Next, the tip portion of the pin 145 is brought into contact with the light beam incident end surface 151 of the cross dichroic prism 150.
(3) In this state, the light beam is introduced into the image forming area of the liquid crystal panel 141G, and the forward / backward position, the planar position, and the rotational position with respect to the light beam incident end surface 151 are adjusted while directly confirming the light beam emitted from the cross dichroic prism 150. Then, focus / alignment adjustment of the liquid crystal panel 141G is performed.
(4) When an appropriate focus / alignment is obtained, a fixing light beam, which is ultraviolet light, is irradiated from the base end portion of the pin 145 to completely cure the ultraviolet curable adhesive.
(5) The other liquid crystal panels 141R and 141B are bonded and fixed in the same manner as described above.

  Therefore, when assembling the optical device main body 180A adopting such a structure, a manufacturing apparatus that can adjust the position is required to adjust the focus alignment between the liquid crystal panels 141R, 141G, and 141B. The manufacturing apparatus will be described later.

[1-3. Structure of manufacturing device for optical device body]
Next, a manufacturing apparatus for manufacturing the optical device body 180A will be described with reference to the drawings.
3 and 4 are diagrams showing the manufacturing apparatus 2 of the optical apparatus main body 180A. Specifically, FIG. 3 is a side view of the manufacturing apparatus 2, and FIG. 4 is a plan view of the manufacturing apparatus 2 as viewed from above.
As shown in FIG. 3 or 4, the manufacturing apparatus 2 is a UV light shielding cover 20, a six-axis position adjustment device 30 as a position adjustment unit, a light beam detection device 40, the light beam detection device 40, and a manufacturing object. A placement unit 50 as a holding unit for placing the cross dichroic prism 150 constituting the optical device main body 180A, a feeding device 60 (FIG. 4) as a light modulation device feeding unit, and illustrated in FIGS. Is provided with an adjustment light source device, a fixing light source device, and a control device that performs operation control and image processing of each of these devices.

  The UV light shielding cover 20 includes a side plate 21 that surrounds the six-axis position adjusting device 30 and the light flux detecting device 40, a bottom plate 22, and a mounting table 25 provided in the lower part. The side plate 21 is provided with a door (not shown) that can be opened and closed. This door is provided for feeding / removing the optical device main body 180A (FIG. 2) and for adjusting the 6-axis position adjusting device 30, and is formed of an acrylic plate or the like that does not transmit ultraviolet rays. Further, the mounting table 25 is provided with a caster 25 </ b> A at a lower portion thereof so that the manufacturing apparatus 2 can be easily moved.

  The light source device for adjustment is a light source of a light beam for position adjustment used when adjusting the position of the light modulation device 140 (liquid crystal panels 141R, 141G, 141B) in the 6-axis position adjustment device 30, and a light source drive circuit (not shown) It is driven by a drive unit such as The fixing light source device is a light source of a fixing light beam (ultraviolet light) that cures the ultraviolet curable adhesive when fixing the light modulation device 140 (liquid crystal panels 141R, 141G, 141B) to the cross dichroic prism 150 side. Yes, and driven by a driving unit such as a light source driving circuit (not shown).

[1-3-1. 6-axis position adjustment device structure]
FIG. 5 is a diagram illustrating the structure of the six-axis position adjusting device 30. In FIG. 5, to simplify the description, the direction orthogonal to the paper surface of FIG. 5 is the X axis, the horizontal direction in FIG. 5 is the Z axis, and the vertical direction in FIG. 5 is the Y axis.
The six-axis position adjusting device 30 adjusts the arrangement positions of the liquid crystal panels 141R, 141G, and 141B with respect to the light beam incident end surface 151 (FIGS. 3 and 4) of the cross dichroic prism 150. As shown in FIG. 5, the six-axis position adjusting device 30 includes a planar position adjusting unit 31 that is movably installed along a rail 22 </ b> A on the bottom plate 22 of the UV light shielding cover 20, and the planar position adjusting unit 31. An in-plane rotation position adjustment unit 32 provided at the tip portion, an out-of-plane rotation position adjustment unit 33 provided at the tip portion of the in-plane rotation position adjustment unit 32, and a tip portion of the out-of-plane rotation position adjustment unit 33. A liquid crystal panel holding unit 34, and a light beam switching unit 35 provided in the liquid crystal panel holding unit 34.

  The planar position adjusting unit 31 adjusts the advancing / retreating position and the planar position of the cross dichroic prism 150 with respect to the light beam incident end surface 151 (FIGS. 3 and 4), and a part of the planar position adjusting unit 31, the in-plane rotational position adjusting unit 32. Then, the out-of-plane rotation position adjustment unit 33 and the liquid crystal panel holding unit 34 are rotated in the XZ plane (see FIG. 5). As shown in FIG. 5, the planar position adjusting unit 31 includes a base 311 slidably provided on the mounting table 25, a rotating unit 312 provided rotatably on the base, and the rotating unit. 3, a leg portion 313 erected on 312, and a connection portion 314 provided at an upper end portion of the leg portion 313 and connected to the in-plane rotational position adjustment unit 32.

  The base 311 is moved in the Z-axis direction of the mounting table 25 by a driving unit such as a motor (not shown). The rotating unit 312 is rotated in the XZ plane on the base 311 by a driving unit (not shown) such as a motor provided on the side, and the liquid crystal panel holding unit 34 has a predetermined supply as shown in FIG. It is movable between the position P1 and a position (adjustment position P2) facing the light beam incident end surface 151 of the cross dichroic prism 150 placed on the placement unit 50. The leg portion 313 is moved in the X-axis direction with respect to the rotating portion 312 by a driving portion (not shown) such as a motor provided on the side portion. The connection unit 314 moves in the Y-axis direction with respect to the leg unit 313 by a driving unit such as a motor (not shown).

The in-plane rotation position adjustment unit 32 adjusts the in-plane rotation position of the liquid crystal panels 141R, 141G, and 141B with respect to the light beam incident end surface 151 (FIGS. 3 and 4) of the cross dichroic prism 150. As shown in FIG. 5, the in-plane rotational position adjusting unit 32 is a columnar base 321 fixed to the tip portion of the planar position adjusting unit 31 and a rotation provided so as to be rotatable in the circumferential direction of the base 321. And an adjustment unit 322.
The rotation adjusting unit 322 is rotated in the XY plane with respect to the base 321 by a driving unit (not shown) such as a motor provided on the side, and the liquid crystal panels 141R and 141G with respect to the light incident end surface 151 (FIGS. 3 and 4). , 141B is adjusted.

The out-of-plane rotation position adjustment unit 33 adjusts the out-of-plane rotation position of the liquid crystal panels 141R, 141G, and 141B with respect to the light beam incident end surface 151 (FIGS. 3 and 4) of the cross dichroic prism 150. As shown in FIG. 5, the out-of-plane rotational position adjustment unit 33 is fixed to the distal end portion of the in-plane rotational position adjustment unit 32 and has a base 331 in which a concave curved surface that is a circular arc in the horizontal direction is formed at the distal end portion. A first adjusting portion 332 that is provided on the concave curved surface of the base portion 331 so as to be slidable along the circular arc, and has a concave curved surface that forms a circular arc in the vertical direction at the distal end portion, and the first adjusting portion 332 A second adjusting portion 333 provided on the concave curved surface so as to be slidable along the arc.
When a drive unit such as a motor (not shown) provided on the side of the base 331 is driven, the first adjustment unit 332 slides, and a drive unit such as a motor (not shown) provided on the top of the first adjustment unit 332 is driven. Then, the second adjustment unit 333 slides and adjusts the rotational position in the out-of-plane direction of the liquid crystal panels 141R, 141G, and 141B with respect to the light incident end surface 151 (FIGS. 3 and 4).

  The liquid crystal panel holding unit 34 holds the light modulation device 140 (liquid crystal panels 141R, 141G, 141B). As shown in FIG. 5, the liquid crystal panel holding unit 34 includes a base material 342 fixed via four column members 341 protruding from the front end of the second adjustment unit 333, and a front end side of the base material 342. A base portion 343 to be fixed by screwing, a pad 344 that is housed so that a tip portion thereof protrudes from the base portion 343, and contacts the liquid crystal panels 141R, 141G, and 141B constituting each light modulation device 140, and the pad 344 And a suction device 345 that vacuum-sucks the liquid crystal panels 141R, 141G, and 141B. Here, the base material 342 and the base 343 of the liquid crystal panel holding unit 34 supply a position adjusting light beam and a fixing light beam to the liquid crystal panels 141R, 141G, and 141B via four optical fibers 346 (not shown). The light source device for adjustment and the light source device for fixation are connected.

FIG. 6 is a front view of the base 343 of the liquid crystal panel holding unit 34.
The base portion 343 is a hollow member with a substantially flat central portion protruding, and an image forming area of the liquid crystal panels 141R, 141G, and 141B (FIG. 5) is provided at a substantially flat central portion of the rectangular tip surface of the protruding portion 343A. The adjustment light source hole 343B set according to the corner portion of the lens and the fixing light source disposed outside the adjustment light source hole 343B and set according to the four corner holes 143A (FIG. 2) of the holding frame 143 A hole 343 </ b> C and a cross-shaped hole 343 </ b> D that is disposed inside the adjustment light source hole 343 </ b> B and exposes the pad 344 are formed.
In addition, four screw holes 343F are formed in the overhanging portion 343E that protrudes outward behind the base portion 343, and the base portion 343 is screwed to the base material 342 by inserting screws into the four screw holes 343F. Is done.

The pad 344 is a porous elastic member that is stretchable and expandable. The pad 344 protrudes by a predetermined dimension from a main body portion (not shown) accommodated in the base portion 343, and the front end surface of the protruding portion is formed in the hole 343D. And a cross portion 344A formed in a cross shape with a corresponding dimension. When such a pad 344 is attached to the base portion 343, the cross portion 344A protrudes from the tip surface of the base portion 343. Therefore, each of the liquid crystal panels 141R, 141G, and 141B does not contact the base 343 but contacts only the cross portion 344A of the pad 344.
Although not specifically shown, the suction device 345 holds the liquid crystal panels 141R, 141G, and 141B on the pad 344 by vacuum suction via a predetermined air hose 345A (FIG. 5).

FIG. 7 is a plan view showing the structure of the light flux switching unit 35.
The light beam switching unit 35 is provided on the base 343 of the liquid crystal panel holding unit 34, and a light beam supplied from an adjustment light source device (not shown) through the optical fiber 346 (FIG. 5) is used for the liquid crystal panels 141R and 141G to be adjusted. , 141B. As shown in FIG. 7, the light beam switching unit 35 includes a color filter 351 and a rectangular frame body 352 that holds the color filter 351.
The color filter 351 is an R color filter 351R that transmits light beams having wavelength regions of R, G, and B at the R color light position PR, the G color light position PG, and the B color light position PB, respectively, along the longitudinal direction of the rectangular frame 352. , G color filter 351G, and B color filter 351B.
As shown in FIG. 7, the color filter 351 allows air to flow between the pad 344 and the suction device 345 across the three R color filters 351R, G color filter 351G, and B color filter 351B. A long hole 351A to be connected is formed.
The rectangular frame 352 is configured to be movable in the longitudinal direction (X-axis direction in FIG. 5) by a driving unit (not shown) such as a motor provided on the side, and the R color light position PR, the G color light position PG, and The B color light position PB is sequentially switched.

[1-3-2. Structure of luminous flux detection device]
8 and 9 are diagrams showing the structure of the light beam detecting device 40. FIG. Specifically, FIG. 8 is a view of the optical device main body 180A and the light flux detection device 40 as viewed from above, and FIG. 9 is a view of the optical device main body 180A and the light flux detection device 40 from the light flux emission side of the cross dichroic prism 150. It is a figure.
As shown in FIG. 3 or FIG. 4, the light beam detection device 40 is arranged at the rear stage of the light beam emission end face 152 of the cross dichroic prism 150 placed on the placement unit 50, and is supported and fixed to the placement unit 50. As shown in FIGS. 3, 4, 8, and 9, the light beam detection device 40 includes a CCD camera 41, a moving mechanism 43 configured to move the CCD camera 41 in a three-dimensional manner, and a light guide unit 45. .

The CCD camera 41 is an area sensor using a CCD (Charge Coupled Device) as an imaging device, and takes in a position adjusting light beam emitted from the cross dichroic prism 150 and outputs it as an electrical signal.
As shown in FIGS. 8 and 9, four CCD cameras 41 are arranged on four sides of the light guide unit 45 via a moving mechanism 43. At this time, the CCD cameras 41 are arranged corresponding to the diagonal lines of the rectangular image forming areas formed on the liquid crystal panels 141R, 141G, and 141B. The CCD camera 41 can freely adjust the zoom and focus by remote control in order to detect a projected image with high accuracy.

  Although not specifically illustrated, the moving mechanism 43 is configured by a support column erected on the mounting unit 50, a plurality of shaft members provided on the support column, a camera attachment unit provided on a uniaxial member, and the like. The As shown in FIG. 9, the moving mechanism 43 can move the CCD camera 41 in the X-axis direction, the Y-axis direction, and the Z-axis direction by driving a driving unit such as a motor (not shown). .

As shown in FIGS. 8 and 9, the light guide unit 45 includes four beam splitters 451 arranged corresponding to the four corners of the rectangular image forming regions of the liquid crystal panels 141R, 141G, and 141B, and each beam splitter 451. And a holding cover 452 for holding in a predetermined position. The light guide unit 45 refracts the light beams at the four corners emitted from the cross dichroic prism 150 by being irradiated to the liquid crystal panels 141R, 141G, and 141B from an adjustment light source device (not shown) by each beam splitter 451, and then the CCD. It has a function of guiding light to the camera 41.
Note that the holding cover 452 is provided with an appropriate opening for transmitting the light beam refracted outward. Further, FIG. 8 shows a case where a light beam is irradiated on the liquid crystal panel 141G. According to such a light guide unit 45, the light beams at the four corners emitted from the cross dichroic prism 150 are directly detected by the CCD camera 41 arranged in four directions without being projected onto a screen or the like (direct view type).

[1-3-3. Structure of mounting unit 50]
As shown in FIG. 3, the mounting portion 50 is provided with a substrate 51 installed on the bottom plate 22, a leg portion 52 standing on the substrate 51, an upper portion of the leg portion 52, and a cross And a set plate 53 to which the dichroic prism 150 and the light flux detection device 40 are attached.
Among these, the set board 53 is provided with the rotation part 531 which can be freely rotated within this board surface. The rotating unit 531 is driven by a driving unit such as a motor (not shown), and rotates with the center position of the cross dichroic prism 150 attached to the set plate 53 as the rotation center C as shown in FIG.

[1-3-4. Structure of feeding device 60]
The material supply device 60 supplies the light modulation device 140 (liquid crystal panels 141R, 141G, 141B) to the six-axis position adjustment device 30. As shown in FIG. 4, the material supply device 60 includes a first holding unit 61, a second holding unit 62, and a third holding unit 63, and the three light modulation devices 140 are formed by the holding units 61 to 63. (Liquid crystal panels 141G, 141B, 141R) are respectively held. Further, the material supply device 60 is moved along the rail 22B on the bottom plate 22 by a driving unit such as a motor (not shown), and the holding units 61 to 63 are appropriately connected to the 6-axis position adjusting device 30. The liquid crystal panels 141R, 141G, and 141B are configured to be movable to a material supply position P1 for supplying materials. The holding structure of the light modulation device 140 may be a structure that is implemented by vacuum suction, like the liquid crystal panel holding portion 34 in the six-axis position adjustment device 30, or a structure that holds the outer peripheral portion of the light modulation device 140. Also good.

[1-3-5. Control device structure]
FIG. 10 is a block diagram showing a control structure by the control device 70.
The control device 70 is composed of a computer having a CPU (Central Processing Unit) and a hard disk, and controls the entire manufacturing apparatus 2 by executing various programs. As shown in FIG. 10, the control device 70 includes an operation unit 71, a display unit 72, and a control unit 73.
The operation unit 71 includes various operation buttons (not shown) that are input with a keyboard and a mouse, for example. By performing an input operation such as this operation button, the control device 70 is appropriately operated, and for example, the operation content of the control device 70 is set for the information displayed on the display unit 72. Then, a predetermined operation signal is appropriately output from the operation unit 71 to the control unit 73 by an input operation of the operation unit 71 by the operator.
Note that the operation unit 71 is not limited to the input operation of the operation buttons, and may be configured to set and input various conditions by, for example, an input operation using a touch panel or an input operation using voice.

  The display unit 72 is controlled by the control unit 73 and displays a predetermined image. For example, it is output from the control unit 73 when setting or updating information stored in a memory described later of the control unit 73 by displaying an image processed by the control unit 73 or by an input operation of the operation unit 71. The data in the memory is displayed as appropriate. For example, liquid crystal, organic EL (electroluminescence), PDP (Plasma Display Panel), CRT (Cathode-Ray Tube), or the like is used for the display unit 72.

  The control unit 73 is configured as a program developed on an OS (Operating System) that controls the CPU, executes a predetermined program in response to an input of an operation signal from the operation unit 71, and drives and controls the manufacturing apparatus 2. At the same time, image processing picked up by the light flux detection device 40 is performed, and the six-axis position adjusting device 30 is driven and controlled based on the processed image. As shown in FIG. 10, the control unit 73 includes an image capturing unit 731, an image processing unit 732, a drive control unit 733, and a memory 734 as a position storage unit.

The image capturing unit 731 is configured by, for example, a video capture board or the like, inputs a signal output from the CCD camera 41 of the light beam detection device 40, converts the input signal into an image signal, and outputs the image signal to the image processing unit 732 To do.
The image processing unit 732 reads the image signal output from the image capturing unit 731, performs image processing based on the read image signal, and based on the processed result, the posture optimum position of the liquid crystal panels 141R, 141G, 141B Determine. Then, a predetermined signal based on the determined optimum posture position is output to the drive control unit 733. Further, the determined optimum posture position is stored in the memory 734 as appropriate.

The drive control unit 733 outputs a control signal to the drive unit 70A based on a predetermined control program or a signal output from the image processing unit 732, and the 6-axis position adjusting device 30 and the placement unit 50 are supplied to the drive unit 70A. The material supply device 60, the adjustment light source device 80, and the fixing light source device 90 are driven. As described above, the drive unit 70A includes a motor, a light source drive circuit, and the like.
The memory 734 stores a predetermined control program, model data, a positional deviation amount related to axial chromatic aberration in the R color light and the B color light with respect to the G color light, and the posture optimum position output from the image processing unit 732. The model data includes initial position data of the light modulation device 140 (liquid crystal panels 141R, 141G, 141B) constituting the optical device main body 180A to be manufactured and a reference for the optical device main body 180A to be manufactured (not shown). There are a reference pattern image obtained from the master optical device, a reference position of the CCD camera 41, and the like.

[1-4. Manufacturing method of optical device]
Next, a manufacturing method of the optical device main body 180A by the manufacturing apparatus 2 described above will be described with reference to the drawings.
FIG. 11 is a flowchart for explaining a manufacturing method of the optical device main body 180A.
First, before manufacturing the optical device main body 180A, as a preliminary preparation, a reference pattern for image processing and a reference position of the CCD camera 41 according to the projector model are acquired in advance (steps S1 and S2).
Specifically, a master optical device in which the focus position and the alignment position are adjusted in advance, and a light guide unit 45 in which the arrangement position of the beam splitter 451 is set according to the size of the image forming area of the master optical device. Set on the placement unit 50 (process S1). Here, the master optical device is obtained by integrally providing three reference light modulation devices (liquid crystal panels) on a reference cross dichroic prism.

  Next, the master optical device irradiates the reference liquid crystal panel for G color light of the master optical device with a position adjusting light beam emitted from the adjustment light source device and emitted from the tip of the six-axis position adjustment device 30. The beam emitted from the CCD camera 41 is directly taken in via the beam splitter 451. At this time, the moving mechanism 43 is operated to move the CCD camera 41 to a position where the light beam can be reliably received (processing S2).

FIG. 12 is a diagram illustrating an example of an image captured by the CCD camera 41.
For example, as shown in FIG. 12, the images 74 captured by the four CCD cameras 41 are composed of four images 74A, 74B, 74C, and 74D, and a plurality of pixel areas CA corresponding to the four corners of the reference liquid crystal panel. Is displayed. This image becomes a reference pattern for image processing performed by the control device 70. Further, the position of the CCD camera 41 at this time becomes a reference position corresponding to the model. The reference pattern is generated for each of the three reference liquid crystal panels, and the reference position of the CCD camera 41 is similarly set for the three reference liquid crystal panels. Such a reference pattern and the reference position of the CCD camera 41 are stored in the memory 734 of the control device 70 as model data corresponding to the model.
The above processes S1 and S2 are performed for a plurality of models in advance, and the reference pattern for each model and the reference position of the CCD camera 41 are stored in the memory 734 as model data.

After the processes S1 and S2, the optical device main body 180A is manufactured.
First, the cross dichroic prism 150 having the emission-side polarizing plate 172 attached at a predetermined position is placed on the placement unit 50 (processing S3: color synthesis optical device placement step).
Further, the three light modulators 140 (liquid crystal panels 141R, 141G, 141B) are inserted into the holes 143A of the holding frame 143 in the state where the pins 145 coated with the ultraviolet curable adhesive are inserted into the first of the feeding device 60. The holding unit 61, the second holding unit 62, and the third holding unit 63 hold (processing S4).
After the processes S3 and S4, the operator operates the operation unit 71 of the control device 70 and calls a predetermined program corresponding to the model of the optical device main body 180A to be manufactured. The control unit 73 of the control device 70 reads the program stored in the memory 734 and starts manufacturing the optical device main body 180A.

[1-4-1. Position adjustment and fixing of liquid crystal panel 141G]
First, the control unit 73 adjusts and fixes the position of the light modulator for G light 140 (liquid crystal panel 141G) with respect to the cross dichroic prism 150 in accordance with the read program (process S5).
Specifically, FIG. 13 is a flowchart showing a procedure for adjusting and fixing the position of the light modulator for G color light 140.
The drive control unit 733 outputs a predetermined control signal to the drive unit 70A based on the model data stored in the memory 734, drives the moving mechanism 43, and installs the CCD camera 41 at the reference position for G color light. (Processing S51).

After the processing S51, the drive control unit 733 outputs a predetermined control signal to the drive unit 70A, drives the 6-axis position adjustment device 30 and the material supply device 60, and causes the 6-axis position adjustment device 30 to perform light modulation for G color light. The device 140 (liquid crystal panel 141G) is held (processing S52: light modulation device holding step).
Specifically, FIG. 14 is a diagram showing a holding procedure of the G-color light modulating device 140 (liquid crystal panel 141G).
The drive control unit 733 drives and controls the material supply device 60, and as shown in FIG. 14, the first holding unit 61 that holds the G color light modulation device 140 (liquid crystal panel 141G) is located at the material supply position P1. (Processing S521: Feeding part moving procedure).

Further, the drive control unit 733 drives and controls the rotation unit 312 of the six-axis position adjusting device 30 and rotates so that the liquid crystal panel holding unit 34 is positioned at the material supply position P1, as indicated by a broken line in FIG. (Processing S522: Position adjustment unit rotation procedure).
Further, the drive control unit 733 controls the suction device 345 to hold the G color light modulation device 140 (liquid crystal panel 141G) held in the first holding unit 61 as shown by the broken line in FIG. The suction is held by the unit 34 (process S523: light modulation device holding procedure).
Furthermore, the drive control unit 733 drives and controls the rotation unit 312 of the six-axis position adjusting device 30, and the liquid crystal panel holding unit 34 controls the G-color light modulator 140 (liquid crystal panel) as shown by the solid line in FIG. 141G) is sucked and held so as to be positioned at the adjustment position P2 (step S524: position adjustment unit rotation procedure).

  After the process S52, the drive control unit 733 outputs a predetermined control signal to the drive unit 70A, and drives the rotation unit 531 of the placement unit 50. Then, as shown in FIG. 14, the center position of the cross dichroic prism 150 installed on the placement unit 50 is rotated as the rotation center C, and the light flux incident end surface 151 G of the cross dichroic prism 150 is opposed to the six-axis position adjusting device 30. (Processing S53: Color synthesizing optical device rotating step).

After the process S53, the control unit 73 drives and controls the adjustment light source device 80 and the light beam switching unit 35 to introduce G color light into the G color light modulation device 140 (liquid crystal panel 141G) (process S54: light beam introduction step). ).
Specifically, the drive control unit 733 outputs a predetermined control signal to the drive unit 70A to drive the light flux switching unit 35 so that the rectangular frame 352 is positioned at the G color light position PG as shown in FIG. (Process S541: luminous flux switching procedure).

In addition, the drive control unit 733 outputs a predetermined control signal to the drive unit 70A, drives the adjustment light source device 80, and introduces the light beam for position adjustment into the G-color light modulation device 140 (liquid crystal panel 141G). (Processing S542). At this time, the introduced light beam is emitted as G color light by the G color filter 351G positioned at the G color light position PG of the light beam switching unit 35.
Then, the control unit 73 causes the CCD camera 41 of the light beam detection device 40 to detect the light beam emitted from the light beam emission end face 152 of the cross dichroic prism 150 (processing S55: image light detection step).

After the process S55, the controller 73 adjusts the position of the G-color light modulator 140 (liquid crystal panel 141G) as described below (process S56: light modulator position adjustment step).
Specifically, the image capturing unit 731 of the control unit 73 receives a signal output from the CCD camera 41 and converts the input signal into an image signal (processing S561: image capturing procedure). Then, the converted image signal is output to the image processing unit 732 of the control unit 73.
The image processing unit 732 reads the image signal output from the image capturing unit 731 and, for example, in FIG. Is calculated (step S562: image processing procedure). The calculated index value is stored in the memory 734 and a predetermined signal is output to the drive control unit 733.

The drive control unit 733 outputs a predetermined control signal to the drive unit 70A based on the signal output from the image processing unit 732, and causes the drive unit 70A to drive the six-axis position adjustment device 30 to focus the liquid crystal panel 141G. Adjustment (position adjustment in the direction of approaching and separating from the cross dichroic prism 150) is performed (processing S563: position adjustment procedure).
In step S563, the image processing unit 732 performs the focus adjustment of the liquid crystal panel 141G, and whether or not the calculated index values of the four corners are almost equal to each other, that is, whether it is in a focused state. It is determined whether or not (processing S564). Here, when it is determined that the in-focus state is not achieved, the processes S561 to S563 are repeatedly performed.

On the other hand, if the image processing unit 732 determines in step S564 that the in-focus state is set, the image processing unit 732 stores the focus position (posture optimum position) of the liquid crystal panel 141G in the in-focus state in the memory 734 (step S564: position). Memory procedure).
Thereafter, the image processing unit 732 reads the reference pattern for the liquid crystal panel 141G stored in the memory 734, compares the reference pattern image with the detection pattern images at the four corners of the liquid crystal panel 141G in the focused state, A deviation amount of the detected pattern image with respect to the reference pattern image is calculated (processing S566: image processing procedure). Then, a predetermined signal based on the deviation amount is output to the drive control unit 733.
The drive control unit 733 outputs a predetermined control signal to the drive unit 70A based on the signal from the image processing unit 732, causes the drive unit 70A to drive the 6-axis position adjusting device 30, and adjusts the alignment of the liquid crystal panel 141G ( Plane position, in-plane rotation position, and out-of-plane rotation position adjustment) are performed (step S567: position adjustment procedure). The liquid crystal panel 141G is arranged at an optimal alignment position.

In step S56, after the position adjustment of the light modulator for G light 140 (liquid crystal panel 141G) is performed, the control unit 73 outputs a predetermined control signal to the drive unit 70A to drive the fixing light source device 90. The pin 145 is irradiated with a position fixing light beam (ultraviolet light). Then, the ultraviolet curable adhesive interposed between the outer periphery of the pin 145 and the hole 143A of the holding frame 143, and between the end of the pin 145 and the light flux incident end surface 151G of the cross dichroic prism 150 is cured to obtain G color light. The light modulator 140 is fixed to the cross dichroic prism 150 (processing S57).
Through the steps as described above, the light modulator for G light 140 (liquid crystal panel 141G) is fixed at a predetermined position on the light beam incident end surface 151G of the cross dichroic prism 150.

[1-4-2. Position adjustment and fixing of liquid crystal panel 141B]
Next, according to the read program, the control unit 73 adjusts and fixes the position of the B-color light modulator 140 (liquid crystal panel 141B) with respect to the cross dichroic prism 150 as described below (processing S6).
Specifically, FIG. 15 is a flowchart showing a procedure for adjusting and fixing the position of the light modulating device 140 for B color light.
The drive control unit 733 installs the CCD camera 41 at the reference position for B color light as in the above-described process S51 (process S61).

After the process S61, the drive control unit 733 causes the six-axis position adjustment device 30 to hold the B-color light modulation device 140 (liquid crystal panel 141B) as in the above-described process S52 (process S62: light modulation device holding step). ).
Specifically, FIG. 16 is a diagram illustrating a holding procedure of the B-color light modulating device 140 (liquid crystal panel 141B).
The drive control unit 733 drives and controls the material supply device 60, and as shown in FIG. 16, the second holding unit 62 that holds the B-color light modulator 140 (liquid crystal panel 141B) is located at the material supply position P1. (Processing S621: Feeding part moving procedure).

Further, the drive control unit 733 drives and controls the rotation unit 312 of the six-axis position adjustment device 30 and rotates so that the liquid crystal panel holding unit 34 is positioned at the material supply position P1, as indicated by a broken line in FIG. (Processing S622: Position adjustment unit rotation procedure).
Further, the drive control unit 733 controls the suction device 345 to hold the B-color light modulation device 140 (liquid crystal panel 141B) held by the second holding unit 62 as shown by the broken line in FIG. The suction is held by the unit 34 (process S623: light modulation device holding procedure).
Furthermore, the drive control unit 733 drives and controls the rotation unit 312 of the 6-axis position adjusting device 30, and the liquid crystal panel holding unit 34 controls the B color light modulation device 140 (liquid crystal panel) as indicated by a broken line in FIG. 141B) is sucked and held so as to be positioned at the adjustment position P2 (step S624: position adjustment unit rotation procedure).

  After the process S62, the drive control unit 733 controls the drive of the rotating unit 531 of the mounting unit 50, as in the above-described process S53, and the cross dichroic installed in the mounting unit 50 as shown in FIG. The center position of the prism 150 is rotated about the rotation center C, and the light beam incident end surface 151B of the cross dichroic prism 150 is positioned at a position facing the six-axis position adjusting device 30 (processing S63: color synthesizing optical device rotating step).

After the process S63, the control unit 73 drives and controls the adjustment light source device 80 and the light beam switching unit 35 and introduces the B color light into the B color light modulation device 140 (liquid crystal panel 141B) in the same manner as the process S54 described above. (Process S64: luminous flux introduction step).
Specifically, the drive control unit 733 outputs a control signal for switching the color light to the B color light to the drive unit 70A, drives the light beam switching unit 35, and the rectangular frame 352 has B color light as shown in FIG. It moves so that it may be located in the position PB (process S641: luminous flux switching procedure). In addition, the drive control unit 733 introduces the light beam for position adjustment to the B-color light modulator 140 (liquid crystal panel 141B), similarly to the above-described process S542 (process S642). At this time, the introduced light beam is emitted as B color light by the B color filter 351B positioned at the B color light position PB of the light beam switching unit 35.
Then, the control unit 73 causes the CCD camera 41 of the light beam detection device 40 to detect the light beam emitted from the light beam emission end face 152 of the cross dichroic prism 150 (process S65: image light detection step), as in the above-described process S55. ).

After the process S65, the controller 73 adjusts the position of the B-color light modulator 140 (liquid crystal panel 141B) as described below (process S66: light modulator position adjustment step).
Specifically, the control unit 73 sets the focus position (posture optimum position) of the liquid crystal panel 141G in the focused state stored in the memory 734 in step S564 and the axis of the B color light with respect to the G color light stored in the memory 734. The positional deviation amount related to the upper chromatic aberration is read (processing S661).
Then, the control unit 73 adds the position deviation amount to the posture optimum position read out in step S661, drives and controls the six-axis position adjusting device 30, and sets the liquid crystal panel 141B to the posture optimum position of the liquid crystal panel 141G. The position is moved to the added position (process S662).
In this state, the image capturing unit 731 of the control unit 73 inputs a signal output from the CCD camera 41 and converts the input signal into an image signal (processing S663: image capturing procedure). Then, the converted image signal is output to the image processing unit 732 of the control unit 73.

Then, the image processing unit 732 reads the image signal output from the image capturing unit 731 and performs image processing as shown below based on the read image (processing S664: image processing procedure).
Specifically, FIG. 17 is a diagram illustrating an example of image processing performed by the image processing unit 732.
The image processing unit 732 acquires the luminance value of the read image, for example, the entire image 74 (74A, 74B, 74C, 74D) of the four corners of the liquid crystal panel 141B in FIG. 17 (processing S664A).

Further, the image processing unit 732 calculates the four corner end positions CA1 to CA4 of the outer peripheral portion of the pixel area CA in the image 74 based on the acquired luminance value (processing S664B). For example, a boundary portion that shifts from a low luminance value portion to a high luminance portion is calculated along the outer peripheral portion of the pixel area CA, and the positions where the calculated outer peripheral portions of the pixel area CA intersect are expressed as four corner end positions CA1 to CA1. CA4.
Further, the image processing unit 732 calculates the calculated separation distance D1 between the four corner end positions CA1 and CA2 and the separation distance D2 between CA1 and CA4 (processing S664C).

Furthermore, the image processing unit 732 reads the reference pattern of the liquid crystal panel 141B stored in the memory 734, compares the separation distance in the reference pattern image with the calculated separation distances D1 and D2, and separates the separation distance in the reference pattern image. The deviation amount of the calculated separation distances D1 and D2 with respect to is calculated (step S664D).
Then, the image processing unit 732 determines whether or not the deviation amount calculated in the process S664D is within a predetermined threshold (process S664E).
If the image processing unit 732 determines that the threshold value is exceeded, the image processing unit 732 drives and controls the six-axis position adjusting device 30 based on the calculated shift amount, thereby controlling the liquid crystal panel 141B with respect to the cross dichroic prism 150. In the direction of approaching or isolating (step S665: position adjustment procedure). Then, the processes S663, S664A to S664E are performed again.

  On the other hand, if the image processing unit 732 determines in step S664E that the value is within the threshold value, that is, if the liquid crystal panel 141B is positioned at the optimum focus position, the reference for the liquid crystal panel 141B stored in the memory 734 is obtained. The pattern is read, and the amount of shift of the detected pattern image with respect to the reference pattern image is calculated in the same manner as the above-described processing S566 (processing S666: image processing procedure). Then, the drive control unit 733 performs alignment adjustment of the liquid crystal panel 141B on the basis of the deviation amount calculated in the process S666 as in the above-described process S567 (process S667: position adjustment procedure). And the liquid crystal panel 141B is arrange | positioned in the optimal alignment position.

After the position adjustment of the B-color light modulator 140 (liquid crystal panel 141B) is performed in the process S66, the B-color light modulator 140 is fixed to the cross dichroic prism 150 as in the process S57 described above (process). S67).
Through the above-described steps, the B-color light modulator 140 (liquid crystal panel 141B) is fixed at a predetermined position on the light beam incident end surface 151B of the cross dichroic prism 150.

[1-4-3. Position adjustment and fixing of liquid crystal panel 141R]
Finally, in accordance with the read program, the control unit 73 adjusts and fixes the position of the R-color light modulator 140 (liquid crystal panel 141R) with respect to the cross dichroic prism 150 (processing S7).
Specifically, FIG. 18 is a flowchart showing a procedure for adjusting and fixing the position of the R-color light modulating device 140.
The drive control unit 733 installs the CCD camera 41 at the reference position for R color light as in the above-described processes S51 and S61 (process S71).

After the process S71, the drive control unit 733 causes the six-axis position adjusting device 30 to hold the R-color light modulator 140 (liquid crystal panel 141R) in the same manner as the processes S52 and S62 described above (process S72: light modulator). Holding step).
Specifically, FIG. 19 is a diagram illustrating a holding procedure of the R color light modulation device 140 (liquid crystal panel 141R).
The drive control unit 733 drives and controls the material supply device 60. As shown in FIG. 19, the third holding unit 63 that holds the R-color light modulator 140 (liquid crystal panel 141R) is located at the material supply position P1. (Processing S721: Feeding part moving procedure).

Further, the drive control unit 733 drives and controls the rotation unit 312 of the six-axis position adjusting device 30 and rotates so that the liquid crystal panel holding unit 34 is located at the material supply position P1, as indicated by a broken line in FIG. (Processing S722: Position adjustment unit rotation procedure).
Further, the drive control unit 733 controls the suction device 345 to hold the R color light modulation device 140 (liquid crystal panel 141R) held by the third holding unit 63 as shown by the broken line in FIG. The suction is held by the unit 34 (process S723: light modulation device holding procedure).
Furthermore, the drive control unit 733 drives and controls the rotation unit 312 of the 6-axis position adjusting device 30, and the liquid crystal panel holding unit 34 controls the light modulator for R color light 140 (the liquid crystal panel as shown by a broken line in FIG. 19. 141R) is sucked and held so as to be positioned at the adjustment position P2 (step S724: position adjustment unit rotation procedure).

  After the process S72, the drive control unit 733 drives and controls the rotation unit 531 of the mounting unit 50, as in the above-described processes S53 and S63, and is installed on the mounting unit 50 as shown in FIG. The center position of the cross dichroic prism 150 is rotated about the rotation center C, and the light beam incident end surface 151R of the cross dichroic prism 150 is positioned at a position facing the six-axis position adjusting device 30 (processing S73: color synthesizing optical device rotating step).

After the process S73, the control unit 73 drives and controls the adjustment light source device 80 and the light beam switching unit 35 in the same manner as the processes S54 and S64 described above, and converts the R color light to the R color light modulation device 140 (liquid crystal panel 141R). (Process S74: luminous flux introduction process).
Specifically, the drive control unit 733 outputs a control signal for switching the color light to the R color light to the drive unit 70A, drives the light beam switching unit 35, and the rectangular frame 352 has the R color light as shown in FIG. It moves so that it may be located in position PR (process S741: luminous flux switching procedure). In addition, the drive control unit 733 introduces the light beam for position adjustment to the R-color light modulator 140 (liquid crystal panel 141R) in the same manner as the above-described processing S542 and S642 (processing S742). At this time, the introduced light beam is emitted as R color light by the R color filter 351R positioned at the R color light position PR of the light beam switching unit 35.

Processes S75, S76 [S761 to S763, S764 (S764A to S764E), S765 to S767], S77, which are subsequent steps of process S74, are the above-described processes S65, S66 [S661 to S663, S664 (S664A to S664E). , S665 to S667] and S67, and description thereof is omitted.
Through the steps as described above, the three light modulation devices 140 are fixed to the light beam incident end face of the cross dichroic prism 150, and the optical device body 180A is manufactured.

[1-5. Effects of the first embodiment]
The first embodiment described above has the following effects.
(1) The manufacturing apparatus 2 includes a mounting unit 50. The mounting unit 50 mounts the cross dichroic prism 150 at a predetermined position, and is configured to be rotatable about the center position of the prism 150 as a rotation center C. Has been. Accordingly, a predetermined light beam incident end surface 151 of the three light beam incident end surfaces of the prism 150 can be made to face the light modulation device 140 held by one six-axis position adjusting device 30. Therefore, it is possible to reduce the size of the manufacturing apparatus 2 without providing three six-axis position adjusting apparatuses as in the prior art. In addition, since the manufacturing apparatus 2 can be configured with one 6-axis position adjusting device 30, the manufacturing cost can be reduced as compared with a configuration including three 6-axis position adjusting devices.

(2) The placement unit 50 places the cross dichroic prism 150 at a predetermined position, and also places the light beam detection device 40 on the light emission side of the prism 150. Therefore, when the prism 150 is rotated, The light beam detection device 40 also rotates. Therefore, it is not necessary to provide the light beam detection devices 40 at the three positions facing the light beam emission end face 152 of the prism 150 when rotated, and only one light beam detection device 40 is sufficient. Further downsizing and cost reduction can be achieved.

(3) Since the manufacturing apparatus 2 includes the light beam switching unit 35 and switches the light beam emitted from the adjustment light source device 80 to the color light corresponding to the light modulation device 140 whose position is adjusted by the six-axis position adjustment device 30. The position of the light modulation device 140 can be adjusted with high accuracy, and the optical device main body 180A with high accuracy can be manufactured.
(4) The six-axis position adjusting device 30 includes a rotating unit 312, and the rotating unit 312 can rotate the six-axis position adjusting device 30 between the feeding position P <b> 1 and the adjusting position P <b> 2. Accordingly, it is possible to facilitate the material supply work to the six-axis position adjusting device 30 and to easily and quickly manufacture the optical device main body 180A.

(5) The manufacturing apparatus 2 includes a material supply device 60. The material supply device 60 holds three light modulation devices 140, and these three light modulation devices 140 can be sequentially moved to the material supply position P1. Therefore, the feeding of the light modulation device 140 to the six-axis position adjustment device 30 can be more easily performed. Further, compared to the case where the worker directly feeds the light modulation device 140 to the 6-axis position adjustment device 30, the light modulation device 140 can be fed to the 6-axis position adjustment device 30 more accurately. 30 can adjust the position of the light modulation device 140 with high accuracy.

(6) The manufacturing apparatus 2 includes a control unit 73. The control unit 73 includes a 6-axis position adjustment device 30, a light beam detection device 40, a placement unit 50, a material supply device 60, an adjustment light source device 80, and a fixing device. The light source device 90 is driven and controlled. Accordingly, almost all of the manufacturing process of the optical device main body 180A can be executed by the control unit 73, and the optical device main body 180A can be manufactured easily and quickly without causing the operator to perform complicated work. .
(7) Since the control unit 73 includes the image capturing unit 731, the image processing unit 732, the drive control unit 733, and the memory 734, the image captured by the image capturing unit 731 is detected by the light flux detection device 40. Is detected and converted into an image signal. In addition, the image processing unit 732 performs image processing based on the image signal captured via the image capturing unit 731 and determines the focus / alignment position of the light modulation device 140. Then, the drive control unit 733 drives and controls the six-axis position adjusting device 30 based on the determined focus / alignment position. Therefore, in the position adjustment of the light modulation device 140, the detected image is visually confirmed, and the ambiguity of the adjustment accuracy is eliminated compared with the configuration in which the six-axis position adjustment device is manually adjusted, and the light modulation is performed. The device 140 can be adjusted to an optimum position with respect to the cross dichroic prism 150, and the optical device body 180A can be manufactured with high accuracy.

(8) The control unit 73 adjusts the focus of the light modulator for G color light 140, determines the optimum focus position of the liquid crystal panel 141G, and stores the focus position in the memory 734. Then, the controller 73 adjusts the position of the light modulator 140 for the other B-color light and the R-color light, and the B-color light is added to the focus position stored in the memory 734 and the position deviation amount related to the axial chromatic aberration is added. The R color light modulator 140 is moved. As a result, when performing the focus adjustment of the B-color light and R-color light modulation device 140, the focus adjustment can be performed from a position close to the optimum posture position in the B-color light and R-color light modulation device 140, and the position can be quickly adjusted. Adjustments can be made.

(9) Further, the control unit 73 calculates a luminance value from the processed image 74, and calculates the four corner end positions CA1 to CA4 of the outer peripheral portion of the pixel area CA in the image 74 from the luminance value. Then, a deviation amount between the separation distances D1 and D2 at the four corner end positions CA1 to CA4 and the separation distance in the reference pattern image is calculated, and focus adjustment of the liquid crystal panels 141B and 141B is performed based on the deviation amount. This makes it possible to perform the focus adjustment of the light modulation device 140 quickly and with simple arithmetic processing, as compared with the configuration in which the light modulation device is focused based on the contrast distribution of the image.

[2. Second Embodiment]
Next, a second embodiment according to the present invention will be described with reference to the drawings.
In the following description, the same structure and the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
In the first embodiment, the optical device main body 180A to be manufactured has a configuration in which each light modulation device 140 is attached to each light beam incident end face of a cross dichroic prism 150 as a color synthesis optical device. In addition, the manufacturing apparatus 2 that manufactures the optical device main body 180A is configured such that the placement unit 50 is rotatable about the center position of the prism 150 as a rotation center.
On the other hand, in the second embodiment, the optical device 280 to be manufactured uses the two dichroic mirrors 153 and 154 as the color synthesizing optical device and the reflection type light modulation device 240 as the light modulation device. The optical device 280 includes panel units 251R, 251G, and 251B in which the dichroic mirrors 153 and 154, the reflective light modulator 240, the incident-side polarizing plate 171 and the emission-side polarizing plate 172 are integrated, and the dichroic mirror 153 and the like. 154 and a light guide 290 for storing and holding the panel units 251R, 251G, and 251B, respectively. In addition, the manufacturing apparatus 3 that manufactures the optical device 280 has an axis orthogonal to the optical path forming surface formed by the mounting optical unit 280 on which the optical device 280 is mounted with the illumination optical axis set in the light guide 290. The center is configured to be rotatable, and is configured to be movable along the optical path forming surface.

[2-1. Projector structure]
FIG. 20 is a diagram illustrating a structure of a projector 200 including the optical device 280 according to the second embodiment.
The projector 200 includes the integrator illumination optical system 110 and the projection lens 160 described in the first embodiment, a color separation optical device 220, and an optical device 280.
The color separation optical device 220 includes two dichroic mirrors 221 and 222 arranged in parallel along the light beam emitted from the integrator illumination optical system 110. The dichroic mirror 221 reflects a blue light component among a plurality of partial light beams emitted from the integrator illumination optical system 110 and transmits other color light components. The dichroic mirror 222 reflects the red light component of the color light transmitted by the dichroic mirror 221 and transmits the other green light component.

The optical device 280 includes three reflection type light modulators 240, panel units 251R, 251G, and 251B in which the incident-side polarization plate 171 and the emission-side polarization plate 172 described in the first embodiment are integrated, and a color synthesis optical device. Two dichroic mirrors 153 and 154, and a light guide 290 as a support.
The reflection type light modulation device 240 is composed of, for example, three reflection type liquid crystal panels 241R, 241G, and 241B such as LCOS (Liquid Crystal On Silicon), and each color light emitted from the color separation optical device 120 according to image information. The light is modulated by reflecting the light. The reflective liquid crystal panels 241R, 241G, and 241B, the incident-side polarizing plate 171 and the exit-side polarizing plate 172 have substantially the same optical axis of the incident light flux, and the light flux to the reflective liquid crystal panels 241R, 241G, and 241B. The unit is formed so that the angle formed by the incident angle and the exit angle is approximately 90 °, and three panel units 251R, 251G, and 251B are configured. In each panel unit 251R, 251G, 251B, each incident-side polarizing plate 171 is arranged substantially orthogonal to the optical axis of the light beam from the color separation optical device 220, and the light beam passing through the emission-side polarizing plate 172 is dichroic mirror 153. 154 are arranged to face each other.

The two dichroic mirrors 153 and 154 are arranged in parallel along the optical axis of the light beam emitted from the panel unit 251G. Of these two dichroic mirrors 153 and 154, the dichroic mirror 153 reflects red light emitted from the panel unit 251R toward the projection lens 160 and transmits green light emitted from the panel unit 251G. The dichroic mirror 154 reflects blue light emitted from the panel unit 251 </ b> B toward the projection lens 160 and transmits red light and green light via the dichroic mirror 153. As described above, the two dichroic mirrors 153 and 154 function as a color synthesis optical device that synthesizes the color lights incident from the three directions and emits them in the same direction.
A predetermined illumination optical axis A is set inside the light guide 290, and the optical components 110, 220, and 280 described above are stored and held at predetermined positions with respect to the illumination optical axis A. The light guide 290 has a projection lens 160 attached at a predetermined position with respect to the illumination optical axis A. Although not specifically illustrated, the light guide 290 is formed of a plate-like body, and is an optical component holding portion that protrudes from the plate surface (for example, an optical component that holds the panel units 251R, 251G, and 251B shown in FIG. 20). The lower light guide in which the holding portions 291R, 291G, and 291B) are formed, and the upper light guide that is formed so as to cover the optical components 110, 220, and 280 held in the lower light guide.

[2-2. Structure of optical device manufacturing equipment]
Next, a manufacturing apparatus for manufacturing the optical device 280 described above will be described.
FIG. 21 is a diagram illustrating the manufacturing apparatus 3 of the optical device 280. Specifically, FIG. 21 is a side view of the manufacturing apparatus 3. In FIG. 21, the same reference numerals are given to the constituent members having the same functions as those of the manufacturing apparatus 2 described in the first embodiment. In FIG. 21, in order to simplify the description, the left-right direction in FIG. 21 is the Z axis, the direction orthogonal to the paper surface of FIG. 21 is the X axis, and the vertical direction in FIG.
The manufacturing apparatus 3 includes the UV light shielding cover 20, the 6-axis position adjustment device 30, the light beam detection device 40, the adjustment light source device 80, and the control device 70 described in the first embodiment, and a placement unit 500 as a holding unit. The material supply device 600 is provided.
In the second embodiment, the 6-axis position adjusting device 30 holds the panel units 251R, 251G, and 251B instead of the light modulation device 140, and performs the position adjustment. The holding structure of the panel units 251R, 251G, and 251B by the six-axis position adjusting device 30 is a structure that holds the outer peripheral portions of the panel units 251R, 251G, and 251B in addition to the structure that is implemented by vacuum suction as in the first embodiment. It is good. In FIG. 21, the illustration of the light beam switching unit 35 described in the first embodiment is omitted. However, it is assumed that the light beam switching unit is disposed in the vicinity of the adjustment light source device 80, and the light beam switching unit performs adjustment. The luminous flux from the light source device 80 is switched to R, G, B color light.

The placement unit 500 places and fixes a light guide 290 (lower light guide) in which two dichroic mirrors 153 and 154 are attached at predetermined positions. As shown in FIG. 21, the mounting unit 500 includes a Z-axis moving unit 501, an X-axis moving unit 502, and a set plate 53.
The Z-axis moving unit 501 is slidably engaged with a rail 22C formed on the bottom plate 22 of the UV light shielding cover 20 so as to extend in the Z-axis direction, and moves along the rail 22C in the Z-axis direction. To do. A rail 501 </ b> A that extends in the X-axis direction and engages with the X-axis moving unit 502 is provided on the upper surface of the Z-axis moving unit 501.
The X-axis moving unit 502 is slidably engaged with the rail 501A of the Z-axis moving unit 501, and moves in the X-axis direction along the rail 501A.
The set plate 53 is rotatably mounted on the X-axis moving unit 502 by a rotating unit 531, and the light guide 290 is placed and fixed, and the light flux detecting device 40 is mounted.
The rotating unit 531, the Z-axis moving unit 501, and the X-axis moving unit 502 are driven by a driving unit such as a motor (not shown) under the control of the control device 70 (see FIG. 10) and mounted on the set plate 53. The light guide 290 (lower light guide) to be fixed is placed on an axis orthogonal to an optical path forming surface (a surface parallel to the paper surface of FIG. 20) formed by the illumination optical axis A set in the light guide 290. The center is rotated and moved along the optical path forming surface.

The material supply device 600 supplies the panel units 251R, 251G, and 251B to the 6-axis position adjusting device 30. The material supply device 600 has substantially the same configuration as the material supply device 60 described in the first embodiment, and includes a first holding unit 610, a second holding unit 620, and a third holding unit 630 (FIG. 24, FIG. 24). 26, see FIG. 28), the panel units 251R, 251G, and 251B are held in the 6-axis position adjusting device 30 so as to be able to supply materials.
And the material supply apparatus 600 is the rail on the baseplate 22 by drive parts, such as a motor which is not shown in figure, under control of the control apparatus 70 (refer FIG. 10) similarly to the material supply apparatus 60 demonstrated in 1st Embodiment. It moves along 22B, and each holding | maintenance part 610-630 is comprised suitably so that it can move to the feed position which can feed the 6-axis position adjustment apparatus 30 suitably. In addition, as a holding structure of panel unit 251R, 251G, 251B, it is good also as a structure implemented by vacuum suction, and it is good also as a structure holding the outer peripheral part of panel unit 251R, 251G, 251B.

[2-3. Manufacturing method of optical device]
Next, a manufacturing method of the optical device 280 by the manufacturing device 3 described above will be described based on the drawings.
FIG. 22 is a flowchart for explaining a method for manufacturing the optical device 280. In addition, since the manufacturing method of the optical apparatus 280 in 2nd Embodiment can be implemented substantially the same as the manufacturing method of the optical apparatus main body 180A in 1st Embodiment, it is simplified and demonstrated below.
First, before manufacturing the optical device 280, the reference position of the CCD camera 41 is acquired in advance as in the first embodiment (processing S11, S12). The master optical device used here is one in which two reference dichroic mirrors functioning as a color combining optical device and three reference panel units are attached to a predetermined position of the light guide 290.

Next, the light guide 290 (lower light guide) to which the dichroic mirrors 153 and 154 are attached at predetermined positions is installed at a predetermined position on the set plate 53 of the placement unit 500 (processing S13: support body installation step).
Further, the three panel units 251R, 251G, and 251B are held by the first holding unit 610, the second holding unit 620, and the third holding unit 630 of the material supply device 600 (processing S14).
After the processes S13 and S14, the operator operates the control device 70 to call a predetermined program corresponding to the model of the optical device 280 to be manufactured. And the control apparatus 70 starts manufacture of the optical apparatus 280 according to the called program.

[2-3-1. Position adjustment and fixing of panel unit 251G]
First, the control device 70 adjusts the position of the G color light panel unit 251G in accordance with the read program, and positions and fixes it at a predetermined position of the light guide 290 (processing S15).
Specifically, FIG. 23 is a flowchart showing a procedure for position adjustment and fixing of the G color light panel unit 251G.
FIG. 24 is a diagram showing a procedure for adjusting and fixing the position of the G color light panel unit 251G.
The control device 70 sets the light beam detection device 40 to the reference position for G color light, similarly to the processing S51 of the first embodiment (processing S151).
After the process S151, the control device 70 drives and controls the rotating unit 531, the Z-axis moving unit 501, and the X-axis moving unit 502 of the mounting unit 500, and controls the set plate 53 to the optical path forming surface (XZ in FIG. 24). Rotated around an axis orthogonal to the plane) and / or moved along the optical path forming surface (XZ plane in FIG. 24), and installed on the set plate 53 of the placement unit 500 as shown in FIG. The light guide 290 is positioned at the adjustment position of the G color light panel unit 251G (processing S152: support moving process).

After the processing S152, the control device 70 drives and controls the 6-axis position adjusting device 30 and the material supply device 600 in substantially the same manner as the processing S52 described in the first embodiment, and controls the 6-axis position adjusting device 30 for G color light. The panel unit 251G is held (processing S153: light modulation device holding step).
Specifically, as shown in FIG. 24, the first holding unit 610 of the material supply device 600 is positioned at the G color light panel unit material supply position P1 in substantially the same manner as the processes S521 to S524 described in the first embodiment. (Processing S153A: Material Supply Unit Moving Procedure) Further, the six-axis position adjusting device 30 is rotated to be positioned at the material supply position P1 (processing S153B: position adjusting unit rotating procedure). Further, the 6-axis position adjusting device 30 holds the G-color light panel unit 251G (processing S153C: light modulation device holding procedure). Furthermore, the 6-axis position adjusting device 30 is rotated to be positioned at the adjustment position of the G-color light panel unit 251R (processing S153D: position adjustment unit rotation procedure).

After the processing S153, the control device 70 introduces the G color light from the six-axis position adjusting device 30 to the G color light panel unit 251G, similarly to the processing S54 described in the first embodiment (processing S154: luminous flux introduction step). .
Specifically, in substantially the same manner as the processes S541 and S542 described in the first embodiment, a light beam switching unit (not shown) is switched, and the G color filter is positioned so that the light beam passing through the light beam switching unit becomes G color light ( Process S154A: luminous flux switching procedure). Further, a light beam for position adjustment is introduced from the adjustment light source device 80 into the G color light panel unit 251G via the light beam switching unit (step S154B).

Then, the control device 70 causes the light beam detection device 40 to detect the light beam that has passed through the G color light panel unit 251G and the two dichroic mirrors 153 and 154 (processing S155: image light detection step).
After the process S155, the control device 70 performs the position adjustment of the G color light panel unit 251G in the same manner as the process S56 described in the first embodiment (process S156: light modulator position adjustment step). Note that the process S156 can be performed in the processes S156A to S156G that are substantially the same procedure as the processes S561 to S567 described in the first embodiment, and a description thereof will be omitted.

In the process S156, after the position adjustment of the G color light panel unit 251G is performed, the G color light panel unit 251G is fixed to the optical component holding part 291G of the light guide 290 (process S157). For example, an adhesive is applied between the G color light panel unit 251G and the optical component holding portion 291G by a dispenser (not shown) driven and controlled by the control device 70, and the G color light panel unit 251G is optically coupled to the light guide 290. It is bonded and fixed to the component holding part 291G. Note that the structure for fixing the G-color light panel unit 251G to the light guide 290 is not limited to the above-described structure, and a structure in which the G-color light panel unit 251G is fixed by a fixing member such as a screw may be employed. A structure for fixing the force may be adopted.
The G color light panel unit 251G is fixed at a predetermined position of the light guide 290 by the process as described above.

[2-3-2. Position adjustment and fixing of panel unit 251R]
Next, according to the read program, the control device 70 adjusts the position of the R color light panel unit 251R and positions and fixes it at a predetermined position of the light guide 290 (processing S16).
Specifically, FIG. 25 is a flowchart showing a procedure for adjusting and fixing the position of the R color light panel unit 251R.
FIG. 26 is a diagram showing a procedure for adjusting and fixing the position of the R color light panel unit 251R.
The control device 70 sets the light beam detection device 40 to the reference position for B-color light in the same manner as the above-described processing S151 (processing S161).

After the process S161, the control device 70 drives and controls the 6-axis position adjusting device 30 and the material supply device 600 and holds the panel unit 251R for the R color light in the 6-axis position adjusting device 30 in substantially the same manner as the process S153 described above. (Processing S162).
Specifically, as shown in FIG. 26, the base 311 (see FIG. 5) of the six-axis position adjusting device 30 is driven and controlled, and the six-axis position adjusting device 30 is moved in the −Z-axis direction (processing S162A). Further, in substantially the same manner as the above-described processing S153A to S153D, the second holding unit 620 of the material supply device 600 is positioned at the R, B color light panel unit material supply position P3 (processing S162B: material supply unit moving procedure). Further, the 6-axis position adjusting device 30 is rotated to be positioned at the material supply position P3 (processing S162C: position adjusting unit rotating procedure). Furthermore, the R-color light panel unit 251R is held by the six-axis position adjusting device 30 (processing S162D: light modulation device holding procedure). Then, the 6-axis position adjusting device 30 is rotated and positioned at a position facing the placement unit 500 (processing S162E: position adjusting unit rotating procedure). In the process S162A, the 6-axis position adjusting device 30 is moved in the −Z-axis direction because the R-color light panel unit 251R held when the 6-axis position adjusting device 30 is rotated in the process S162E. This is to avoid collision with the G color light panel unit 251G fixed to the light guide 290.

After the process S162, the control device 70 drives and controls the rotation unit 531 of the mounting unit 500, and rotates the set plate 53 around an axis orthogonal to the optical path forming surface (XZ plane in FIG. 26). 26, the light guide 290 installed on the set plate 53 of the placement unit 500 is positioned at the adjustment position of the R-color light panel unit 251R (processing S163: support moving step). As shown in FIG. 26, the rotation axis of the rotation unit 531 is located at the center of an imaginary circle passing through the adjustment position of the G color light panel unit 251G and the adjustment position of the R color light panel unit 251R.
After the process S163, the control device 70 drives and controls the base 311 (see FIG. 5) of the six-axis position adjusting device 30, and moves the six-axis position adjusting device 30 in the + Z-axis direction to thereby adjust the R color light panel unit 251R. It is positioned at the adjustment position (processing S164).

After the process S164, the control device 70 introduces the R color light from the 6-axis position adjusting device 30 to the R color light panel unit 251R in substantially the same manner as the above-described process S154 (process S165: light flux introduction step). Note that the process S165 can be performed in the processes S165A and S165B, which are substantially the same procedures as the processes S154A and S154B described above, and a description thereof will be omitted.
Then, similarly to the process S155 described above, the control device 70 causes the light beam detection device 40 to detect the light beam that has passed through the R color light panel unit 251R and the two dichroic mirrors 153 and 154 (process S166: image light detection). Process).

After the process S166, the control device 70 performs the position adjustment of the R color light panel unit 251R in the same manner as the process S66 described in the first embodiment (process S167: light modulator position adjustment step). The process S167 is a process S167A to S167C, S167D (S167D1 to S167D5), S167E to S167G, which is substantially the same procedure as the processes S661 to S663, S664 (S664A to S664E) and S665 to S667 described in the first embodiment. The description can be omitted.
After the position adjustment of the R color light panel unit 251R is performed in the process S167, the R color light panel unit 251R is fixed to the optical component holding portion 291R of the light guide 290 in substantially the same manner as the process S157 described above (process S168). ).
The R color light panel unit 251R is fixed at a predetermined position of the light guide 290 by the process as described above.

[2-3-3. Position adjustment and fixing of panel unit 251B]
Finally, the control device 70 adjusts the position of the B-color light panel unit 251B according to the read program, and positions and fixes it at a predetermined position of the light guide 290 (processing S17).
Specifically, FIG. 27 is a flowchart showing a procedure for adjusting and fixing the position of the B color light panel unit 251B.
FIG. 28 is a diagram illustrating a procedure for adjusting and fixing the position of the B color light panel unit 251B.
The control device 70 sets the light beam detection device 40 to the reference position for the R color light similarly to the above-described processing S151 and S161 (processing S171).

After the process S171, the control device 70 drives and controls the 6-axis position adjustment device 30 and the material supply device 600 in substantially the same manner as the process S162 described above, and holds the B-color light panel unit 251B in the 6-axis position adjustment device 30. (Processing S172).
Specifically, as shown in FIG. 28, the base 311 (see FIG. 5) of the six-axis position adjusting device 30 is driven and controlled in substantially the same manner as the above-described processes S162A to S162E. Move in the Z-axis direction (process S172A). In addition, the third holding unit 630 of the material supply device 600 is positioned at the panel unit supply position P3 for the R and B color lights (process S172B: supply part moving procedure). Further, the 6-axis position adjusting device 30 is rotated and positioned at the material supply position P3 (processing S172C: position adjusting unit rotating procedure). Furthermore, the 6-axis position adjusting device 30 holds the B color light panel unit 251B (processing S172D: light modulation device holding procedure). Then, the six-axis position adjusting device 30 is rotated and positioned at a position facing the placement unit 500 (processing S172E). In the process S172A, the 6-axis position adjusting device 30 is moved in the −Z-axis direction because the B color light panel unit 251B held when the 6-axis position adjusting device 30 is rotated in the process S172E. This is to avoid collision with the G color light panel unit 251G and the R color light panel unit 251R fixed to the light guide 290.

After the process S172, the control device 70 drives and controls the Z-axis moving unit 501 and the X-axis moving unit 502 of the mounting unit 500, and moves the light guide 290 along the optical path forming surface (XZ plane in FIG. 28). Then, as shown in FIG. 28, the light guide 290 installed on the set plate 53 of the placement unit 500 is positioned at the adjustment position of the B-color light panel unit 251B (processing S173: support moving step).
After the process S173, the control device 70 drives and controls the base 311 (see FIG. 5) of the 6-axis position adjusting device 30 to move the 6-axis position adjusting device 30 in the + Z-axis direction, similarly to the above-described process S164. And positioned at the adjustment position of the panel unit 251B for B color light (processing S174).

After the process S174, the control device 70 causes the six-axis position adjusting device 30 to introduce the B color light panel unit 251B in substantially the same manner as the above-described processes S154 and S165 (process S175: light flux introduction process). Note that the process S175 can be performed in the processes S175A and S175B, which are substantially the same procedures as the processes S154A and S154B described above, and a description thereof will be omitted.
Then, similarly to the processes S155 and S166 described above, the control device 70 causes the light beam detection device 40 to detect the light beam that has passed through the B-color light panel unit 251B and the dichroic mirror 154 (process S176: image light detection step).

After the process S176, the control device 70 adjusts the position of the B color light panel unit 251B in the same manner as the process S167 described above (process S177: light modulator position adjustment step). The process S177 can be performed by the processes S177A to S177C and S177D (S177D1 to S177D5) and S177E to S177G, which are substantially the same procedures as the processes S167A to S167C, S167D (S167D1 to S167D5) and S167E to S167G described above. Description is omitted.
In the process S177, after the position adjustment of the B color light panel unit 251B is performed, the B color light panel unit 251B is fixed to the optical component holding part 291B of the light guide 290 in substantially the same manner as the processes S157 and S168 described above ( Process S178).
Through the steps as described above, the three panel units 251R, 251G, and 251B are fixed at predetermined positions of the light guide 290, and the optical device 280 is manufactured.

[2-4. Effect of Second Embodiment]
According to 2nd Embodiment mentioned above, there exist the following effects other than the effect substantially the same as said (1)-(9).
(10) The placement unit 500 constituting the manufacturing apparatus 3 includes a Z-axis moving unit 501, an X-axis moving unit 502, and a rotating unit 531. The placement unit 500 places the light guide 290 on which the two dichroic mirrors 153 and 154 are fixed at a predetermined position, and forms an optical path formed by the illumination optical axis A set on the light guide 290. It is configured to be rotatable about an axis orthogonal to the surface, and is configured to be movable along the optical path forming surface. As a result, even if the reflection-type light modulation device 240 is employed as the light modulation device and the reflection-type light modulation device 240 is spaced from the dichroic mirrors 153 and 154, the mounting unit 500 can be changed. By rotating and / or moving, the reflection type light modulation device 240 held by one 6-axis position adjustment device 30 can be arranged at a predetermined position of the light guide 290, and the optical device 280 can be easily formed. Can be manufactured. In addition, since the placement unit 500 includes the rotation unit 531, the manufacturing apparatus 3 is designed in consideration of the position of the rotation axis of the rotation unit 531, and thus described in the first embodiment. The optical device main body 180A in which each light modulation device 140 is fixed to each light beam incident end face of the cross dichroic prism 150 as described above can be easily manufactured, and can be manufactured corresponding to optical devices having various configurations.

(11) Since the optical device 280 manufactured by the manufacturing device 3 employs the reflection-type light modulation device 240, the light flux that is transmitted as compared with the transmission-type light modulation device 140 described in the first embodiment. Can be avoided, and thermal degradation of the reflective light modulator 240 can be avoided.
(12) In the optical device 280, the panel unit 251R, 251G, 251B includes the incident-side polarizing plate 171, the emission-side polarizing plate 172, and the reflective light modulation device 240 as a unit. By manufacturing the optical device 280, the optical components 110, 153, 154, 220, 251R, 251G, and 251B housed and held in the light guide 290 can be easily aligned with each other. Manufacturing is also easy.

[3. Variation of Embodiment]
Although the present invention has been described with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the scope of the present invention. It is.
For example, in each of the embodiments, the placement units 50 and 500 place the light guide 290 (lower light guide) to which the cross dichroic prism 150 or the two dichroic mirrors 153 and 154 are attached at a predetermined position. Although the light beam detection device 40 is also placed, the present invention is not limited to this. For example, when the prism 150 or the two dichroic mirrors 153 and 154 are rotated instead of the placement units 50 and 500, the light beam emission end face 152 of the prism 150 or the light beam emission position of the dichroic mirror 154 is disposed in the light beam detection device 40. It is also possible to adopt a configuration in which the three positions are fixed respectively. In such a configuration, the light beam detection device 40 does not rotate in accordance with the rotation of the prism 150 or the light guide 290, and the positional deviation of the CCD camera 41 does not occur.

  In each of the embodiments described above, the light flux switching unit 35 includes the color filter 351 and the rectangular frame 352, but is not limited thereto. For example, as shown in FIG. 29, the light flux switching unit 35 includes a circular frame 353 and a fan-shaped color filter 354 (R color filter 354R, G color filter 354G, B color filter provided in the frame 353). 354B), and may be configured to be rotatable about the rotation center 354C. Then, the light beam switching unit 35 rotates about the rotation center 354C, so that the light beam supplied from the adjustment light source device via the optical fiber 346 is adjusted to the liquid crystal panels 141R (241R) and 141G to be adjusted. (241G) and 141B (241B) are switched to colored light.

  In addition, the light beam switching unit 35, for example, as an adjustment light source device, is different in the semiconductor materials and additives that are configured, and when using three light emitting diodes that emit R, G, B color light, these light emission Any one of the light emitting diodes of the diode may be configured as a device that is turned on in accordance with the liquid crystal panels 141R (241R), 141G (241G), and 141B (241B) to be adjusted. Moreover, you may comprise as an apparatus which moves these light emitting diodes and switches the color light to light-emit.

In each of the above embodiments, the manufacturing method of the optical device main body 180A and the optical device 280 to be manufactured is not limited to the flow of FIGS. The order of procedures and the like may be changed. For example, the G-color light modulator 140 (G-color light panel unit 251G), the B-color light modulator 140 (B-color light panel unit 251B), and the R-color light modulator 140 (R-color light panel unit 251R). The order of position adjustment and fixing is not limited to the order of the above-described embodiments, and position adjustment and fixing may be performed in other orders.
In each of the above-described embodiments, the focus adjustment of the G-color light modulator 140 (G-color light panel unit 251G) is performed based on the contrast distribution of the image. Focus adjustment similar to 140 (B-color light panel unit 251B) and R-color light modulator 140 (R-color light panel unit 251R) may be performed. Conversely, the focus adjustment of the light modulator for B color light 140 (panel unit for B color light 251B) and the light modulator for R color light 140 (panel unit for R color light 251R) is adjusted for the light modulator for G color light 140 (G color light). Similar to the panel unit 251G), it may be performed based on the contrast distribution.

In each of the above embodiments, only an example of a projector using three light modulation devices has been described. However, the present invention is a projector using two light modulation devices or a projector using four or more light modulation devices. It is also applicable to.
In each of the above embodiments, only an example of a front type projector that performs projection from the direction of observing the screen has been described. However, the present invention also applies to a rear type projector that performs projection from the side opposite to the direction of observing the screen. Applicable.

In the second embodiment, the manufacturing apparatus 3 is not limited to the optical apparatus 280 described in the second embodiment, and the following optical apparatus can be manufactured.
30 to 34 are diagrams showing the structure of a projector provided with an optical device that can be manufactured by the manufacturing apparatus 3. 30 to 34, the same structures and the same members as those of the above embodiments are denoted by the same reference numerals.
For example, the optical device 380 constituting the projector 200A shown in FIG. 30 is different from the light guide 290 in shape, but has a light guide 390 having substantially the same configuration (a lower light guide and an upper light guide). A cross dichroic prism 150 fixed to a predetermined position of the guide 390 and three panel units 251R, 251G, and 251B are provided. The three panel units 251R, 251G, and 251B are respectively positioned and fixed to the holding portions 391R, 391G, and 391B of the light guide 390 so that the exit-side polarization plates 172 are opposed to the light-beam exit end face of the cross dichroic prism 150. The

  In addition, for example, the optical device 480 constituting the projector 200B shown in FIG. Two dichroic mirrors 153 and 154 are arranged so that an angle between each other is approximately 90 °, and three panel units 251R, 251G, and 251B are provided. In the three panel units 251R, 251G, and 251B, the incident-side polarizing plates 171 are arranged substantially orthogonal to the optical axis of the light beam from the color separation optical device 120, and the light beams that pass through the emission-side polarizing plates 172 are dichroic mirrors. Positioned and fixed to the holding portions 491R, 491G, and 491B of the light guide 490 so as to face 153 and 154, respectively.

Further, for example, an optical device 580 constituting the projector 200C shown in FIG. 32 has a light guide 590 having a shape (two-body configuration of a lower light guide and an upper light guide) that is substantially the same as the light guide 290, but having a different shape. Two dichroic mirrors 153 and 154 and three panel units 551R, 551G, and 551B are provided.
The panel units 551R, 551G, and 551B include the transmission-type light modulation device 140 (liquid crystal panels 141R, 141G, and 141B), the incident-side polarizing plate 171 and the reflective-type emitting-side polarizing plate 572 described in the first embodiment. Provided so that the optical axes of the light beams incident on these members substantially coincide with each other, and the angle formed by the incident angle and the emission angle of the light beam on the reflective exit-side polarizing plate 572 is approximately 90 °. is there. The reflection-type exit-side polarizing plate 572 reflects a polarized light beam having a predetermined polarization axis among transmitted light beams, and transmits a light beam having another polarization axis. A configuration in which a multilayered structure film is attached, or a reflective polarizing plate composed of an inorganic material may be employed. The panel units 551R, 551G, and 551B are configured such that the incident-side polarizing plates 171 and the liquid crystal panels 141R, 141G, and 141B are arranged substantially orthogonal to the light flux through the color separation optical device 220, and the reflection-type exit-side polarizing plate 572. Are fixedly positioned on the holding portions 591R, 591G, and 591B of the light guide 590 so that the light beams passing through the dichroic mirrors 153 and 154 are directed.

Furthermore, for example, an optical device 680 constituting the projector 200D shown in FIG. 33 is different from the light guide 290 in shape but has a light guide 690 having a substantially similar configuration (a lower light guide and an upper light guide). The two dichroic mirrors 153 and 154, the panel units 551R and 551G described above, and the panel unit 651B are provided so that the angle between them is approximately 90 °. The panel unit 651B is obtained by disposing the liquid crystal panel 141B and the reflective exit-side polarizing plate 572 at a predetermined distance in the optical axis direction in the panel unit 551B described above. In these panel units 551R, 551G, and 651B, each incident-side polarizing plate 171 is disposed substantially orthogonal to the optical axis of the light beam from the color separation optical device 120, and the light beam passes through each reflective exit-side polarizing plate 572. Are positioned and fixed to the holding portions 691R, 691G, and 691B of the light guide 690, respectively, so as to face the dichroic mirrors 153 and 154.
Also, for example, the projector 200E shown in FIG. 34 is configured in substantially the same manner as the projector 200D shown in FIG. 33, and is different from the optical device 680 in FIG. 33 in that the three panel units 551R, 551G, and Of the 551B, in the panel unit 551B for B-color light, only the liquid crystal panel 141B and the reflective exit-side polarizing plate 572 are disposed close to each other.
By using the B color light panel unit 651B shown in FIG. 33, the projector 200D can be downsized as compared with the projector 200E shown in FIG. 34, the panel unit 551B can be downsized compared to the panel unit 651B shown in FIG. 33, and the panel unit 551B can be easily manufactured.

  As described above, the manufacturing apparatus 3 employs a reflection type light modulation device or a reflection type exit-side polarizing plate, so that the optical modulation device is structured such that the light modulation device is spaced from the color synthesis optical device. The device can be manufactured. In each of the above embodiments, a liquid crystal panel is used as the light modulation device. However, an optical device having a light modulation device other than liquid crystal, such as a device using a micromirror, can be manufactured.

In the second embodiment, the configuration using the light guide 290 as the support has been described. However, the present invention is not limited thereto, and any member having any shape can be used as long as it supports the light modulation device and the color synthesis optical device. It may be adopted.
In the second embodiment, the rotation axis of the rotation unit 531 of the manufacturing apparatus 3 is located at the center of an imaginary circle passing through the adjustment position of the G color light panel unit 251G and the adjustment position of the R color light panel unit 251R. However, the present invention is not limited to this, and the position may be set according to the optical device to be manufactured.

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

  An optical device manufacturing apparatus and an optical device manufacturing method according to the present invention can be reduced in size and cost, so that the optical device used in a projector used in the field of presentations, home theaters, and the like is manufactured. Useful as.

FIG. 3 is a diagram illustrating a structure of a projector including the optical device according to the first embodiment. The disassembled perspective view which shows the structure of the optical apparatus in the said embodiment. The figure which shows the manufacturing apparatus of the optical apparatus in the said embodiment. The figure which shows the manufacturing apparatus of the optical apparatus in the said embodiment. The figure which shows the structure of the 6-axis position adjustment apparatus in the said embodiment. The figure which looked at the base of the liquid crystal panel holding part in the embodiment from the front. The top view which shows the structure of the light beam switching part in the said embodiment. The figure which shows the structure of the light beam detection apparatus in the said embodiment. The figure which shows the structure of the light beam detection apparatus in the said embodiment. The figure which shows the control structure by the control apparatus in the said embodiment. 6 is a flowchart for explaining a method for manufacturing an optical device according to the embodiment. The figure which shows an example of the image imaged with the CCD camera in the said embodiment. 7 is a flowchart showing a procedure for position adjustment and fixing of the G-color light modulation device in the embodiment. The figure which shows the holding | maintenance procedure of the light modulation device for G color lights in the said embodiment. The flowchart which shows the procedure of position adjustment of the light modulation apparatus for B color lights in the said embodiment, and fixation. The figure which shows the holding | maintenance procedure of the light modulation apparatus for B color lights in the said embodiment. The figure which shows an example of the image process implemented by the image process part in the said embodiment. 5 is a flowchart showing a procedure for position adjustment and fixing of the R color light modulation device in the embodiment. The figure which shows the holding | maintenance procedure of the optical modulator for R color lights in the said embodiment. The figure which shows the structure of a projector provided with the optical apparatus which concerns on 2nd Embodiment. The figure which shows the manufacturing apparatus of the optical apparatus in the said embodiment. 6 is a flowchart for explaining a method for manufacturing an optical device according to the embodiment. The flowchart which shows the procedure of position adjustment and fixation of the panel unit for G color lights in the said embodiment. The figure which shows the procedure of position adjustment and fixation of the panel unit for G color lights in the said embodiment. The flowchart which shows the procedure of position adjustment and fixing of the panel unit for R color lights in the said embodiment. The figure which shows the procedure of position adjustment and fixing of the panel unit for R color lights in the said embodiment. The flowchart which shows the procedure of position adjustment and fixation of the panel unit for B color lights in the said embodiment. The figure which shows the procedure of position adjustment of the panel unit for B color lights in the said embodiment, and fixation. The figure which shows the modification of each said embodiment. The figure which shows the structure of the projector provided with the optical apparatus which can be manufactured with the manufacturing apparatus in the said 2nd Embodiment. The figure which shows the structure of the projector provided with the optical apparatus which can be manufactured with the manufacturing apparatus in the said 2nd Embodiment. The figure which shows the structure of the projector provided with the optical apparatus which can be manufactured with the manufacturing apparatus in the said 2nd Embodiment. The figure which shows the structure of the projector provided with the optical apparatus which can be manufactured with the manufacturing apparatus in the said 2nd Embodiment. The figure which shows the structure of the projector provided with the optical apparatus which can be manufactured with the manufacturing apparatus in the said 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2, 3 ... Manufacturing apparatus, 30 ... 6-axis position adjustment part (position adjustment part), 35 ... Light beam switching part, 40 ... Light beam detection apparatus, 50,500. ..Placement unit (holding unit), 60, 600 ... feeding device (light modulation device feeding unit), 73 ... control unit, 80 ... light source device for adjustment, 111 ... light source device , 120, 220 ... color separation optical device, 140, 240 ... light modulation device, 150 ... cross dichroic prism (color synthesis optical device), 151, 151R, 151G, 151B ... light beam incident end face, 152 ... Flux exit end face, 153,154 ... Dichroic mirror (color synthesis optical device), 160 ... Projection lens (projection optical device), 180,280 ... Optical device, 731 ... Image capture Insertion unit, 732 ... Image processing unit 733: Drive control unit, 734: Memory (position storage unit), P1: Feeding position, P2: Adjustment position, S3: Color synthesis optical device installation step, S13: Support Body installation step, S52, S62, S72, S153, S162, S172 ... Light modulation device holding step, S53, S63, S73 ... Color synthesis optical device rotation step, S54, S64, S74 ... Light flux introduction Step, S55, S65, S75 ... Image light detection step, S56, S66, S76 ... Light modulator position adjustment step, S152, S163, S173 ... Support body moving step, S521, S621, S721, S153A , S162B, S172B ... Feeding part moving procedure, S522, S524, S622, S624, S722, S724, S153B, S153D, S162C, S1 2E, S172C, S172E ... Position adjustment unit turning procedure, S523, S623, S723, S153C, S162D, S172D ... Light modulation device holding procedure, S541, S641, S741, S154A, S165A, S175A ... Light flux Switching procedure, S561, S663, S763, S156A, S167C, S177C ... Image capture procedure, S562, S566, S664, S666, S764, S766, S156B, S156F, S167D, S167F, S177D, S177F ... Image processing Procedure, S563, S567, S665, S667, S765, S767, S156C, S156G, S167E, S167G, S177E, S177G ... Position adjustment procedure, S565, S156E ... Position storage procedure.

Claims (15)

A plurality of light modulation devices that modulate a plurality of color lights according to image information for each color light, a plurality of light flux incident end faces to which the light modulation devices are attached, and a light flux that is emitted by combining the color lights incident on the light flux incidence end faces An optical device manufacturing apparatus for manufacturing an optical device comprising a color synthesizing optical device having an emission end face,
An adjustment light source device for introducing a light beam for position adjustment into the light modulation device;
A light beam detection device that detects image light emitted from the light beam emission end surface via the light modulation device and the color synthesis optical device;
A holding unit for holding the color combining optical device at a predetermined position;
A position that holds any one of the plurality of light modulation devices and adjusts the position of the light modulation device with respect to the color combining optical device based on image light detected by the light beam detection device An adjustment unit,
The holding unit is configured to be rotatable so that a predetermined light beam incident end surface of the plurality of light beam incident end surfaces of the color combining optical device faces the light modulation device held by the position adjusting unit. An optical device manufacturing apparatus. A plurality of light modulation devices that modulate a plurality of color lights according to image information for each color light, a color combining optical device that combines each color light modulated by each light modulation device, and a predetermined illumination optical axis are set, An optical device manufacturing apparatus that manufactures an optical device including a support that supports the light modulation device and the color combining optical device at a predetermined position with respect to the illumination optical axis,
An adjustment light source device for introducing a light beam for position adjustment into the light modulation device;
A light beam detection device for detecting image light via the light modulation device and the color synthesis optical device;
A holding unit that holds the support supporting the color synthesis optical device in a predetermined position;
The light modulation for the color synthesizing optical device held by the support based on the image light detected by the light flux detection device, holding any one of the plurality of light modulation devices A position adjustment unit for adjusting the position of the device,
The holding portion is configured to be able to rotate the support about an axis orthogonal to an optical path forming surface formed by the illumination optical axis set on the support when the support is held. And an optical device manufacturing apparatus configured to be movable along the optical path forming surface. In the manufacturing apparatus of the optical device according to claim 1 or 2,
The holding unit holds the color synthesizing optical device or the support at a predetermined position, and holds the light beam detecting device on a light beam emission side of the color synthesizing optical device or the support. Manufacturing equipment. In the manufacturing apparatus of the optical apparatus in any one of Claims 1-3,
An apparatus for manufacturing an optical device, comprising: a light beam switching unit that switches a light beam emitted from the adjustment light source device to color light corresponding to a light modulation device held by the position adjustment unit. In the manufacturing apparatus of the optical apparatus in any one of Claims 1-4,
The position adjustment unit is configured to adjust a supply position to which any one of the plurality of light modulation devices is supplied, and an adjustment position for adjusting the position of the light modulation device with respect to the color synthesis optical device. A device for manufacturing an optical device, wherein the device is configured to freely rotate between the two. In the manufacturing apparatus of the optical device according to claim 5,
The light supply position is provided with a light modulation device supply portion for holding the plurality of light modulation devices in the position adjustment portion so that supply is possible.
The apparatus for manufacturing an optical device, wherein the light modulation device supply section is configured to be able to move any one of a plurality of light modulation devices to the supply position. In the manufacturing apparatus of the optical apparatus in any one of Claims 1-6,
A control unit that drives and controls the position adjustment unit;
The control unit performs image processing based on an image capturing unit that captures an image detected by the light beam detection device and converts the image into an image signal, and an image signal output from the image capturing unit. An image processing unit that determines an optimum posture position of the light modulation device based on the result, and a drive control unit that drives and controls the position adjustment unit based on the optimum posture position determined by the image processing unit. An optical device manufacturing apparatus characterized by comprising: In the manufacturing apparatus of the optical device according to claim 7,
A position storage unit that stores an optimum posture position of the light modulation device determined by the image processing unit;
The control unit causes the position adjustment unit to adjust the position of one of the plurality of light modulation devices, and then adjusts the position of another light modulation device of the plurality of light modulation devices. When performing the above, the position adjustment unit is driven and controlled based on the posture optimum position stored in the position storage unit, the other light modulation device is moved,
The image processing unit calculates a luminance value from the processed image, acquires a boundary point of the image based on the luminance value, and determines an optimum posture position of the other light modulation device based on the acquired boundary point. An apparatus for manufacturing an optical device, characterized in that determination is made. A plurality of light modulation devices that modulate a plurality of color lights according to image information for each color light, a plurality of light flux incident end faces to which each light modulation device is attached, and a light flux that is emitted by combining the color light incident on each light flux incidence end face An optical device manufacturing method for manufacturing an optical device comprising a color synthesizing optical device having an emission end face,
A color synthesis optical device installation step of installing the color synthesis optical device at a predetermined position;
A light modulation device holding step of holding any one of the plurality of light modulation devices in a position adjustment unit;
Among the plurality of light beam incident end faces of the color combining optical apparatus, the color combining optical apparatus is configured such that a light beam incident end face corresponding to the light modulating apparatus held in the light modulating apparatus holding step faces the light modulating apparatus. A rotating process of the color synthesizing optical device;
A light beam introduction step for introducing a light beam for position adjustment into the light modulation device;
An image light detection step for causing a light beam detection device to detect image light emitted from the light beam emission end face via the light modulation device and the color synthesis optical device;
A light modulation device position adjustment step of adjusting the position of the light modulation device with respect to the color combining optical device using the position adjustment unit based on the image light detected in the image light detection step. A method for manufacturing an optical device. A plurality of light modulation devices that modulate a plurality of color lights according to image information for each color light, a color combining optical device that combines each color light modulated by each light modulation device, and a predetermined illumination optical axis are set, An optical device manufacturing method for manufacturing an optical device comprising: a support body that supports the light modulation device and the color combining optical device at a predetermined position with respect to the illumination optical axis,
A support body installation step of installing the support body supporting the color synthesis optical device at a predetermined position;
A light modulation device holding step of holding any one of the plurality of light modulation devices in a position adjustment unit;
Rotating the support around an axis orthogonal to the optical path forming surface formed by the illumination optical axis,
And / or a support moving step of moving the support along the optical path forming surface;
A light beam introduction step for introducing a light beam for position adjustment into the light modulation device;
An image light detection step for causing a light beam detection device to detect image light via the light modulation device and the color synthesis optical device;
Light modulation device position adjustment for adjusting the position of the light modulation device with respect to the color synthesizing optical device supported by the support using the position adjustment unit based on the image light detected in the image light detection step A method for manufacturing an optical device. In the manufacturing method of the optical device according to claim 9 or 10,
The method of manufacturing an optical device, wherein the light beam introduction step includes a light beam switching procedure for switching to color light corresponding to the light modulation device held in the light modulation device holding step. In the manufacturing method of the optical device according to any one of claims 9 to 11,
The position adjusting unit is configured to adjust a position of a feeding position to which one of the plurality of light modulation devices is fed, and a position of the light modulation device with respect to the color synthesis optical device. It is configured to be freely rotatable between
The light modulation device holding step includes: a position adjustment unit rotation procedure for rotating the position adjustment unit; and the position adjustment unit rotated to the material supply position, wherein any of the plurality of light modulation devices is provided. An optical device manufacturing method comprising: a light modulation device holding procedure for holding the light modulation device. In the manufacturing method of the optical device according to claim 12,
The plurality of light modulation devices are held at the position adjustment unit so as to be able to supply material at the material supply position, and any one of the plurality of light modulation devices can be moved to the material supply position. A light modulation device feeding portion configured is provided,
The light modulation device holding step includes a supply portion moving procedure for moving the light modulation device supply portion and positioning any one of the plurality of light modulation devices at the supply position. A method for manufacturing an optical device. In the manufacturing method of the optical device according to any one of claims 9 to 13,
The position adjustment unit is drive-controlled by a drive unit that drives the position adjustment unit and a control unit that controls the drive unit,
The light modulation device position adjusting step includes an image capturing procedure in which the control unit captures the image light detected in the light beam detecting step and converts the image light into an image signal, and an image signal converted in the image capturing procedure. The control unit performs image processing based on the image processing procedure, the image processing procedure for determining the posture optimum position of the light modulation device based on the processing result, and the posture optimum position determined by the image processing procedure An optical apparatus comprising: a position adjustment procedure for adjusting the position of the light modulation device with respect to the color synthesis optical device by the control unit controlling the drive unit to drive the position adjustment unit. Manufacturing method. In the manufacturing method of the optical device according to claim 14,
In the light modulation device position adjustment step, after adjusting the position of one of the plurality of light modulation devices, the optimum position of the light modulation device determined in the image processing procedure is determined. A position storage procedure stored by the control unit, and when performing position adjustment of another light modulation device among the plurality of light modulation devices, the control unit based on the posture optimum position stored in the position storage procedure By moving the other light modulation device by driving the position adjustment unit by controlling the drive unit,
The image processing procedure calculates a luminance value from the processed image, acquires a boundary point of the image based on the luminance value, and determines an optimum posture position of the other light modulation device based on the acquired boundary point. A method for manufacturing an optical device, characterized by: determining.

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