JP5861330B2 - projector - Google Patents

Description

  The present invention relates to a projector.

2. Description of the Related Art Conventionally, a projector is known that includes a plurality of optical components and an optical component housing that houses the plurality of optical components and places the plurality of optical components at predetermined positions (see, for example, Patent Document 1). .
In such a projector, for example, in order to obtain a projected image with high contrast, it is necessary to position the incident-side polarizing plate, which is an optical component, in a desired posture.
For this reason, the projector described in Patent Document 1 is provided with a posture adjusting mechanism for adjusting the posture of the incident-side polarizing plate.

And at the time of manufacture of a projector, the attitude | position of the incident side polarizing plate is adjusted as follows.
First, the worker holds the incident-side polarizing plate in the posture adjusting mechanism, and houses the posture adjusting mechanism including the incident-side polarizing plate in the lower housing of the optical component housing. The operator closes the upper opening of the lower housing with the upper housing.
In this state, the operator places an optical axis adjustment jig dedicated for position adjustment of the posture adjustment mechanism on the upper surface of the optical component casing, and the optical axis adjustment jig is inserted into the hole formed in the upper casing. To be engaged with the posture adjusting mechanism.
After this, the operator turns on the light source, adjusts the attitude adjustment mechanism by operating the optical axis adjustment jig while observing the projection image displayed on the screen via each optical component and the projection lens, Adjust the orientation of the incident-side polarizing plate.

JP 2004-004562 A

However, the conventional optical component housing requires an optical axis adjustment jig dedicated to position adjustment of the attitude adjustment mechanism when adjusting the attitude of the incident-side polarizing plate.
Therefore, when the orientation of the incident side polarizing plate is shifted while using the projector, a dedicated optical axis adjustment jig must be used, and the incident side polarizing plate can be easily adjusted in posture. There is a problem that it is difficult.

  An object of the present invention is to provide a projector that can easily adjust the posture of an optical component.

  The projector according to the present invention includes a holding member that holds an optical component, an optical component housing that houses the optical component, an outer surface of the optical component housing, and the holding member that is fixed to the optical component housing. A support member for slidably supporting the holding member, and the holding member holds the optical component. A holding member main body, and a sliding portion that protrudes outside the optical component housing and is supported by the support surface; and the base member is fixed to the outer surface of the optical component housing; And a facing portion facing the support surface with the sliding portion interposed therebetween.

Here, various optical components can be employed, for example, a polarizing plate, a retardation plate, an optical compensation element, or the like.
In the present invention, the holding member that holds the optical component includes a sliding portion that can slide on the support surface formed on the outer surface of the optical component casing.
This enables the operator to operate the holding member (sliding part) from the outside of the optical component housing without using a dedicated optical axis adjustment jig as in the prior art, and to place the sliding part on the support surface. By sliding the top, it is possible to easily adjust the posture of the holding member (optical component).
In addition, the projector includes a base member having a fixed portion that is fixed to the outer surface of the optical component housing and a facing portion that faces the support surface across the sliding portion.
As a result, after adjusting the orientation of the holding member (optical component), the holding member (optical component) is attached to the base member (housing for optical component) by applying an adhesive between the facing portion and the sliding portion. Can be fixed in a desired posture.

By the way, when a screw is used as a means for fixing the holding member to the optical component casing, the holding member is rotated by the frictional force between the screw and the holding member when the screw is rotated. Becomes easy to work together. That is, although the holding member (optical component) is set to a desired posture by adjusting the posture, the holding member is interlocked with the rotation of the screw when the holding member is fixed to the optical component casing, so that the optical component Is likely to deviate from the desired posture.
In the present invention, as described above, since the adhesive can be used as a means for fixing the holding member to the base member (housing for optical component), the optical component is desired when the holding member is fixed to the base member. There is no deviation from the posture.
In addition, the holding member is not fixed directly to the optical component casing with an adhesive, but is fixed to the base member fixed to the optical component casing with an adhesive.
This prevents the adhesive from adhering unnecessarily to the optical component casing, and further prevents the adhesive from adhering to the optical component disposed inside the optical component casing.

In the projector according to the aspect of the invention, it is preferable that the facing portion abuts on the sliding portion and urges the sliding portion toward the support surface.
In the present invention, since the facing portion is configured to urge the sliding portion toward the support surface, the sliding portion can be stably slid on the support surface when adjusting the posture of the optical component. it can. For this reason, it is possible to satisfactorily adjust the posture of the optical component.
In addition, after the optical component is set to a desired posture by posture adjustment, the holding member can be temporarily fixed in the desired posture by the biasing force of the facing portion. For this reason, the optical component is not deviated from the desired posture during the shift to the operation of applying the adhesive after adjusting the posture of the optical component, and the optical component can be favorably fixed in the desired posture.

In the projector according to the aspect of the invention, it is preferable that an adhesive notch for applying an adhesive is formed in the facing portion.
In the present invention, since the above-mentioned bonding notch is formed in the facing part, after adjusting the posture of the optical component, if an adhesive is applied to the bonding notch, a wide area between the facing part and the sliding part is formed. The adhesive can be filled over. For this reason, the fixed state of the holding member with respect to the base member can be stably maintained, that is, the optical component can be stably maintained in a desired posture.

  In the projector according to the aspect of the invention, the base member may include a protruding portion that is integrally formed with an edge of the fixed portion and protrudes so as to be substantially orthogonal to the fixed portion, and faces the holding member body in the protruding portion. The surface includes a first surface that comes into contact with the holding member body, and a second surface that is positioned on a side away from the holding member body with respect to the first surface when the protrusion is viewed from the side, The second surface is preferably connected to the outer edge of the protruding portion.

In the present invention, in the base member, the above-described first surface is provided on the protruding portion that is integrally formed with the edge of the fixing portion and protrudes so as to be substantially orthogonal to the fixing portion.
Accordingly, the holding member can be slid on the first surface in addition to the support surface. For this reason, it becomes possible to move a holding member stably and it becomes possible to implement the attitude | position adjustment of an optical component favorably.
In addition, the protrusion is provided with a second surface that is positioned on the side away from the holding member main body with respect to the first surface and that is connected to the outer edge of the protrusion.
As a result, after adjusting the posture of the optical component, if the adhesive is applied between the second surface and the holding member main body in addition to between the facing portion and the sliding portion, the fixing state of the holding member to the base member is further improved. Can be maintained.

In the projector according to the aspect of the invention, the protruding portion is connected to the fixing portion, and an insertion hole that allows the sliding portion to be inserted is formed between the protruding portion and the fixing portion. It is preferable to be provided at the edge portion of the insertion hole.
In the present invention, since the insertion hole described above is formed between the protruding portion and the fixing portion, and the opposing portion is provided at the edge portion of the insertion hole, the unit itself combining the optical component, the holding member, and the base member is compact. The unit itself can be downsized.

In the projector according to the aspect of the invention, it is preferable that the projector includes a biasing member that biases the holding member main body toward the first surface.
In the present invention, since the projector includes a biasing member that biases the holding member main body toward the first surface, the holding member main body can be stably slid on the first surface when adjusting the posture of the optical component. It is possible to adjust the posture of the optical component satisfactorily.
Further, after the optical component is set to a desired posture by posture adjustment, the holding member can be temporarily fixed in the desired posture by the biasing force of the biasing member. For this reason, the optical component is not deviated from the desired posture during the shift to the operation of applying the adhesive after adjusting the posture of the optical component, and the optical component can be favorably fixed in the desired posture.

In the projector according to the aspect of the invention, the holding member main body is formed in a frame shape having a passage opening for allowing a light beam to pass therethrough, and the protrusion is viewed from a direction along the optical axis of the light beam incident on the optical component. In addition, it is preferably positioned between the sliding portion and the passage opening.
In the present invention, the protrusion is positioned at the position described above. In other words, the protrusion is set to a size smaller than the holding member main body, that is, set to a minimum necessary size. Therefore, the base member can be reduced in size and weight, and as a result, the unit itself combining the optical component, the holding member, and the base member can be reduced in size and weight.

FIG. 2 is a diagram illustrating a schematic configuration of a projector according to the present embodiment. The perspective view which shows the optical unit in this embodiment. The perspective view which shows the structure of the upper housing | casing in this embodiment. The figure which shows the structure of the polarizing plate unit in this embodiment. The figure which shows the structure of the polarizing plate unit in this embodiment. The figure for demonstrating the attitude | position adjustment method of the incident side polarizing plate in this embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Configuration of projector]
FIG. 1 is a diagram illustrating a schematic configuration of the projector 1.
The projector 1 projects an image and displays a projected image on a screen (not shown).
As shown in FIG. 1, the projector 1 includes an optical unit 3 that is housed in the exterior housing 2.

[Configuration of optical unit]
FIG. 2 is a perspective view showing the optical unit 3.
As shown in FIG. 2, the optical unit 3 includes an optical component housing 4 and a projection lens 5 as a projection optical device supported by the optical component housing 4.
As shown in FIG. 1, the optical component housing 4 includes a light source device 31 having a light source lamp 311 and a reflector 312, illumination arrays having lens arrays 321 and 322, a polarization conversion element 323, and a superimposing lens 324. The color separation optical device 33 having the device 32, the dichroic mirrors 331 and 332, and the reflection mirror 333, the relay optical device 34 having the incident side lens 341, the relay lens 343, and the reflection mirrors 342 and 344, and three polarizing plates The unit 6, three liquid crystal panels 35 as light modulators, three output side polarizing plates 36, and a cross dichroic prism 37 as a color synthesizing optical device are accommodated.

In the optical unit 3, the light beam emitted from the light source device 31 and passing through the illumination optical device 32 is made red (R), green (G), and blue (B) by the color separation optical device 33 with the above-described configuration. Separated into three colored lights. Each separated color light is modulated by each liquid crystal panel 35. The modulated color lights are combined by the prism 37 and projected onto the screen by the projection lens 5.
In addition, since each member 31-37, 5 mentioned above is a structure used with a general projector, below, only the structure of the housing | casing 4 for optical components and the polarizing plate unit 6 is demonstrated.

[Configuration of optical component casing]
FIG. 3 is a perspective view showing the configuration of the upper housing 42.
3 shows a state in which only the polarizing plate unit 6 on the G color light side is attached to the upper housing 42 for convenience of explanation.
As illustrated in FIG. 2, the optical component housing 4 includes a lower housing 41 and an upper housing 42.
The lower housing 41 is a portion in which the members 31 to 37 are accommodated, and is formed in a container shape.
The upper housing 42 is formed in a lid shape that is attached to a container-like opening in the lower housing 41.

  In the upper housing 42, as viewed from above (viewed from a direction orthogonal to the paper surface of FIG. 1), the three light beams in the prism 37 are disposed at positions where the prism 37 is disposed, as shown in FIG. A notch 421 having three edge portions 421A along the incident surface 371 (FIG. 1) is formed.

In the upper casing 42, three unit mounting portions 43 are provided on the upper surface (the outer surface of the optical component casing 4) as shown in FIG. As described above, in FIG. 3, only the polarizing unit 6 on the G color light side is attached to the upper housing 42, and therefore, two units on the R, B color light side among the three unit mounting portions 43. The attachment portion 43 is mainly illustrated.
The three unit attachment portions 43 are provided at positions close to the three edge portions 421A, and are the portions to which the three polarizing plate units 6 are attached.
In addition, since the three unit attaching parts 43 are the same structures, below, only the one unit attaching part 43 is demonstrated.

As shown in FIG. 3, the unit mounting portion 43 includes a pair of positioning protrusions 431, a first fixing hole 432, and a support portion 433.
The pair of positioning protrusions 431 has a cylindrical shape protruding upward, and is a part for positioning a base member 9 described later of the polarizing plate unit 6.
The pair of positioning protrusions 431 are arranged in parallel along the extending direction of the edge portion 421A as viewed from above.
The first fixing hole 432 is provided between the pair of positioning protrusions 431, and is a screw hole for fixing the base member 9 with a screw Sc (FIGS. 2 and 3).

As shown in FIG. 3, the support portion 433 is provided on the edge portion 421 </ b> A side with respect to the pair of positioning protrusions 431 and the first fixing holes 432, and can slide a holding member 8 described later of the polarizing plate unit 6. This is the supporting part.
The upper surface 433A of the support portion 433 has a curved surface shape that protrudes upward.
More specifically, the upper surface 433A has an arc shape centered on the optical axis Ax when viewed from the direction along the optical axis Ax (see FIG. 6) of the light beam incident on the polarizing plate unit 6 to be supported.
Note that the above-described upper surface 433A corresponds to a support surface according to the present invention. Hereinafter, the upper surface 433A is referred to as a support surface 433A.

Moreover, as shown in FIG. 3, the center part of the support part 433 is formed with a recess 433B that is recessed downward from the support surface 433A.
The recess 433B is formed to communicate with the edge portion 421A.
Further, in the edge portion 421A, on both sides of the concave portion 433B, as shown in FIG. 3, contact portions 421B protruding to the light emitting side are formed.
Each tip of the contact portion 421B is formed in a flat shape and is set to be located on the same plane orthogonal to the optical axis Ax.

[Configuration of polarizing plate unit]
4 and 5 are diagrams showing the configuration of the polarizing plate unit 6. FIG. Specifically, FIG. 4 is a perspective view of the assembled state of the polarizing plate unit 6 as viewed from the light emitting side, and FIG. 5 is an exploded perspective view of the polarizing plate unit 6 as viewed from the light emitting side.
As shown in FIG. 1, the three polarizing plate units 6 are disposed on the light incident side of each liquid crystal panel 35, respectively.
Since the three polarizing plate units 6 have the same configuration, only one polarizing plate unit 6 will be described below.
As shown in FIG. 4 or 5, the polarizing plate unit 6 includes an incident-side polarizing plate 7 as an optical component, a holding member 8, a base member 9, and a clip 10 as an urging member.
The incident side polarizing plate 7 is formed in a rectangular plate shape, and transmits only a light beam having a polarization direction substantially the same as the polarization direction aligned by the polarization conversion element 323 out of the incident light beam.

(Configuration of holding member)
The holding member 8 holds the incident-side polarizing plate 7 and adjusts the posture of the incident-side polarizing plate 7 by sliding on the support surface 433A.
As shown in FIG. 4 or 5, the holding member 8 includes a holding member main body 81 and a sliding portion 82.
As shown in FIG. 5, the holding member main body 81 is formed of a rectangular frame-shaped plate having a rectangular passage opening 811 for allowing a light beam to pass therethrough.
Here, as shown in FIG. 4 or FIG. 5, the edge portion of the passage opening 811 and the outer edge portion of the holding member main body 81 protrude to the light exit side and support the outer edge of the incident side polarizing plate 7. The support protrusion 812 is formed.
The incident-side polarizing plate 7 is attached to the holding member main body 81 in a state where the passage opening 811 is closed and the outer edge is supported by the plurality of supporting protrusions 812.

In the holding member main body 81, two track holes 813 extending in an arc shape with the optical axis Ax as the center are formed on the upper side of the passage opening 811 as shown in FIG. 4 or FIG.
The two track holes 813 are respectively formed at symmetrical positions with respect to the vertical axis V passing through the optical axis Ax when viewed from the direction along the optical axis Ax (see FIG. 6).
In the holding member main body 81, two adhesive receiving portions 814 projecting upward are formed at the upper edge portion as shown in FIG. 4 or FIG.
The two adhesive receiving portions 814 are respectively provided on the left and right sides when viewed from the direction along the optical axis Ax, and are inclined so as to be directed to the light emitting side as they are directed upward.

The sliding portion 82 is formed integrally with the upper edge portion of the holding member main body 81, and in the state where the polarizing plate unit 6 is attached to the optical component casing 4, the optical component casing is interposed through the notch 421. It is a portion that protrudes outside the body 4 and is supported by the support surface 433A.
More specifically, as shown in FIG. 4 or FIG. 5, the sliding portion 82 is integrally formed between the two adhesive receiving portions 814 at the upper edge portion of the holding member main body 81, and from the upper edge portion. Projects to the light incident side.
The sliding portion 82 is positioned on the vertical axis V when viewed from the direction along the optical axis Ax (see FIG. 6).
Further, the sliding portion 82 is formed in a shape following the support surface 433A, that is, in an arc shape centered on the optical axis Ax when viewed from the direction along the optical axis Ax.

Further, as shown in FIG. 4 or FIG. 5, the sliding portion 82 is provided with an operation knob 821 that protrudes upward and is operated by an operator.
Further, the sliding portion 82 and the holding member 8 are formed with an urging opening 83 that allows the clip 10 to be inserted through the connecting portion of the sliding portion 82 and the holding member 8.
The biasing opening 83 is positioned on the vertical axis V as seen from the direction along the optical axis Ax (see FIG. 6).

[Configuration of base member]
The base member 9 is a member that is fixed to the upper surface of the upper housing 42 (the outer surface of the optical component housing 4) and fixes the holding member 8 to the upper housing 42.
As shown in FIG. 4 or 5, the base member 9 includes a fixing portion 91, a protruding portion 92, and a facing portion 93.
The fixing portion 91 is a portion that is fixed to the upper surface of the upper housing 42 and is configured by a rectangular plate.

As shown in FIG. 4 or 5, the fixing portion 91 includes a pair of positioning holes 911 corresponding to the pair of positioning protrusions 431 formed on the upper surface of the upper housing 42, and a first fixing hole 432. A corresponding second fixing hole 912 is formed.
Then, the base member 9 is positioned with respect to the upper housing 42 by inserting the pair of positioning protrusions 431 into the pair of positioning holes 911, respectively.
Further, the screw Sc is inserted through the second fixing hole 912 and screwed into the first fixing hole 432, whereby the base member 9 is fixed to the upper housing 42.

The protruding portion 92 is configured by a rectangular plate integrally formed on the edge of the light emitting side (the side close to the edge portion 421A) of the fixed portion 91 so as to be substantially orthogonal to the fixed portion 91. Yes.
The projecting portion 92 projects into the optical component housing 4 through the notch 421 in a state in which the base member 9 is attached to the upper housing 42, and a contact portion of the upper housing 42. It contacts the tip of 421B.
Further, the protrusion 92 is positioned between the sliding portion 82 and the passage opening 811 when viewed from the direction along the optical axis Ax in a state where the polarizing plate unit 6 is attached to the upper housing 42. In other words, the protrusion 92 is formed to extend from the notch 421 to the vicinity of the upper edge of the passage opening 811 when viewed from the direction along the optical axis Ax (see FIG. 6).
In the projecting portion 92, the end surface on the light emission side (surface facing the holding member main body 81) includes a first surface 921 and a second surface 922 as shown in FIG. 5.

The first surface 921 is formed in a flat shape orthogonal to the optical axis Ax in a state where the base member 9 is attached to the upper housing 42, and the holding member body 81 in a state where the polarizing plate unit 6 is assembled. Is the surface that abuts.
The second surface 922 is positioned on the light incident side (side away from the holding member main body 81) with respect to the first surface 921 when the protrusion 92 is viewed from the side.
More specifically, two second surfaces 922 are provided on the upper side of the projecting portion 92 and on both the left and right sides, and are connected to the outer edge of the projecting portion 92 and the upper surface of the fixing portion 91.

4 or 5, the first surface 921 corresponds to the two track holes 813 formed in the holding member main body 81, and has two columnar guides respectively inserted into the track holes 813. A protrusion 923 is formed.
The fixing portion 91 and the protruding portion 92 described above are formed with an insertion hole 913 that allows the sliding portion 82 to be inserted through the connecting portion of the fixing portion 91 and the protruding portion 92.

The facing portion 93 is formed at the edge portion of the insertion hole 913 and is configured to be elastically deformable with respect to the fixing portion 91.
The facing portion 93 faces the support surface 433A across the sliding portion 82 in a state where the polarizing plate unit 6 is attached to the upper housing 42.
More specifically, the facing portion 93 abuts on the sliding portion 82 and urges toward the support surface 433A.
As shown in FIG. 4 or FIG. 5, an adhesive notch 931 for applying an adhesive is formed at the tip of the facing portion 93.

[Method of adjusting the orientation of the polarizing plate on the incident side]
Next, a method for adjusting the posture of the incident side polarizing plate 7 will be described.
FIG. 6 is a diagram for explaining a method of adjusting the posture of the incident-side polarizing plate 7. Specifically, FIG. 6 is a view of the polarizing plate unit 6 viewed from the direction along the optical axis Ax (viewed from the light emitting side).
First, an operator assembles the polarizing plate unit 6 as follows.
That is, the operator attaches the incident-side polarizing plate 7 to the holding member 8, inserts the sliding portion 82 into the insertion hole 913, and inserts the guide protrusions 923 into the track holes 813. The holding member 8 is applied to the member 9.
Then, the operator inserts the clip 10 into the biasing opening 83 and the insertion hole 913, and causes the clip 10 to sandwich the holding member main body 81 and the protruding portion 92.
That is, the clip 10 urges the holding member main body 81 toward the first surface 921.
In this state, the clip 10 is positioned on the vertical axis V as seen from the direction along the optical axis Ax, as shown in FIG.

Next, the operator uses the pair of positioning protrusions 431, the first fixing holes 432, the pair of positioning holes 911, the second fixing holes 912, and the screws Sc and assembled the polarizing plate as described above. The base member 9 of the unit 6 is positioned and fixed to the upper housing 42.
By attaching the polarizing plate unit 6 to the upper housing 42 in this manner, the sliding portion 82 is supported on the support surface 433A, and the sliding portion 82 is biased toward the support surface 433A by the facing portion 93. Is done.

After attaching the three polarizing plate units 6 to the upper housing 42 as described above, the operator adjusts the attitude of each incident-side polarizing plate 7 constituting the three polarizing plate units 6 as follows. .
The operator turns on the light source device 31 and confirms the projection image projected on the screen via each of the members 32 to 37 and 7 and the projection lens 5 so that the contrast of the projection image is maximized. The attitude of the incident side polarizing plate 7 is adjusted.
That is, as shown in FIG. 6, the worker moves the operation knob 821 protruding upward to the left and right. As a result, the holding member 8 (incident side polarizing plate 7) rotates about the optical axis Ax while the sliding portion 82 slides on the support surface 433A while each track hole 813 is guided by each guide projection 923. To do.

Then, the operator rotates the incident-side polarizing plate 7 as described above and positions the projection image at the position where the contrast of the projected image is maximized, and then holds the holding member 8 with respect to the upper casing 42 as shown below. Fix it.
That is, the operator applies an adhesive from the upper side of the polarizing plate unit 6 toward the bonding notch 931 and applies the adhesive between the second surface 922 and the holding member main body 81.
By applying the adhesive in this manner, the sliding portion 82 is fixed to the facing portion 93 and the holding member main body 81 is fixed to the protruding portion 92.

According to this embodiment described above, the following effects are obtained.
In the present embodiment, the holding member 8 includes a sliding portion 82 that protrudes to the outside of the optical component housing 4 through the notch portion 421 and is slidable on the support surface 433A.
As a result, the operator operates the holding member 8 (operation knob 821) from the outside of the optical component housing 4 without using a dedicated optical axis adjustment jig as in the prior art, and slides 82. Can be slid on the support surface 433A. That is, the posture adjustment of the incident side polarizing plate 7 can be easily performed.

The projector 1 also includes a base member 9 having a fixed portion 91 and a facing portion 93.
Thereby, after adjusting the attitude of the incident-side polarizing plate 7, the holding member 8 is attached to the base member 9 (optical component casing 4) by applying an adhesive between the facing portion 93 and the sliding portion 82. Can be fixed in a desired posture.
Furthermore, since an adhesive can be employed as means for fixing the holding member 8 to the base member 9, the incident-side polarizing plate 7 does not deviate from a desired posture when the holding member 8 is fixed to the base member 9. .
In addition, the holding member 8 is not directly fixed to the optical component casing 4 with an adhesive, but the holding member 8 is bonded to the base member 9 fixed to the optical component casing 4 with an adhesive. It is fixed.
This prevents the adhesive from adhering to the optical component casing 4 unnecessarily, and further prevents the adhesive from adhering to members such as the liquid crystal panel 35 disposed inside the optical component casing 4. There is no fear of it.

Further, since the facing portion 93 is configured to urge the sliding portion 82 toward the support surface 433A, the sliding portion 82 is stable on the support surface 433A when adjusting the posture of the incident-side polarizing plate 7. Can be slid. For this reason, the posture adjustment of the incident side polarizing plate 7 can be carried out smoothly.
Furthermore, after setting the incident-side polarizing plate 7 to a desired posture by adjusting the posture, the holding member 8 can be temporarily fixed in the desired posture by the biasing force of the facing portion 93. For this reason, after adjusting the posture of the incident-side polarizing plate 7, the incident-side polarizing plate 7 does not deviate from the desired posture while moving to the operation of applying the adhesive. Can be fixed well.

In addition, since the adhesive notch 931 is formed in the facing part 93, if the adhesive is applied to the adhesive notch 931 after adjusting the position of the incident-side polarizing plate 7, the distance between the facing part 93 and the sliding part 82 is set. The adhesive can be filled over a wide area.
For this reason, the fixed state of the holding member 8 with respect to the base member 9 can be stably maintained, that is, the incident-side polarizing plate 7 can be stably maintained in a desired posture.

Further, in the base member 9, a first surface 921 is provided on a protruding portion 92 that protrudes into the optical component housing 4 through the notch portion 421.
Accordingly, the holding member 8 can be slid on the first surface 921 in addition to the support surface 433A. For this reason, it becomes possible to move the holding member 8 stably, and it becomes possible to perform the attitude | position adjustment of the incident side polarizing plate 7 favorably.
The protruding portion 92 is provided with a second surface 922 that is positioned on the light incident side with respect to the first surface 921 and that is continuous with the outer edge of the protruding portion 92 and the upper surface of the fixing portion 91. .
Thus, after adjusting the posture of the incident-side polarizing plate 7, if an adhesive is applied between the second surface 922 and the holding member main body 81 in addition to between the facing portion 93 and the sliding portion 82, the holding on the base member 9 is maintained. The fixed state of the member 8 can be maintained better.
Further, since the holding member 8 is provided with the two adhesive receiving portions 814 at positions corresponding to the second surface 922, it is easy to apply the adhesive between the second surface 922 and the holding member main body 81. Can be implemented.

Furthermore, since the insertion hole 913 is formed between the protrusion part 92 and the fixing | fixed part 91, and the opposing part 93 is provided in the edge part of the insertion hole 913, the polarizing plate unit 6 itself can be put together compactly, and a polarizing plate The unit 6 can be downsized.
In addition, since the projector 1 includes the clip 10, the incident-side polarizing plate 7 can be stably slid on the first surface 921, and the posture adjustment of the incident-side polarizing plate 7 can be favorably performed.

Furthermore, since the holding member 8 can be temporarily fixed in the desired posture by the biasing force of the clip 10 together with the biasing force of the facing portion 93, the incident-side polarizing plate 7 is in the desired posture after adjusting the posture of the incident-side polarizing plate 7. The incident-side polarizing plate 7 can be fixed more favorably in a desired posture without being deviated.
The protrusion 92 is positioned between the notch 421 and the passage opening 811. In other words, the protruding portion 92 is set to a size smaller than the holding member main body 81, that is, set to a minimum necessary size. For this reason, the base member 9 can be reduced in size and weight, and as a result, the polarizing plate unit 6 can be reduced in size and weight.

Furthermore, since the movement of the holding member 8 in the direction along the vertical axis V and the direction along the optical axis Ax can be restricted by the facing portion 93 and the clip 10, the incident-side polarizing plate 7 can be satisfactorily centered on the optical axis Ax. Can be rotated.
Further, as viewed from the direction along the optical axis Ax, the sliding portion 82 (support surface 433A) is positioned on the vertical axis V, and each guide protrusion 923 (each track hole 813) is centered on the vertical axis V. Since it is positioned at a symmetrical position, the rotation of the incident side polarizing plate 7 around the optical axis Ax can be stabilized.
Furthermore, since the clip 10 is positioned on the vertical axis V when viewed from the direction along the optical axis Ax, the holding member main body 81 is stably directed toward the first surface 921 when adjusting the posture of the incident-side polarizing plate 7. Can be energized.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above embodiment, the incident side polarizing plate 7 is employed as the optical component according to the present invention. However, the present invention is not limited to this, and the output side polarizing plate 36, the phase difference plate, or the optical compensation element may be employed. I do not care.
In the embodiment, instead of the transmissive liquid crystal panel 35, a light modulation element other than liquid crystal, such as a reflective liquid crystal panel or a device using a micromirror, may be employed.
In the said embodiment, the attitude | position adjustment method of the incident side polarizing plate 7 is not restricted to the attitude | position adjustment method demonstrated in the said embodiment.
For example, in the above-described embodiment, the attitude adjustment of the incident-side polarizing plate 7 is performed while confirming the projected image on the screen. However, the present invention is not limited to this, and the attitude adjustment light beam emitted from the prism 37 is used as a CCD camera. For example, a method of performing posture adjustment while detecting directly may be employed.

  The present invention can be used for projectors used in presentations, home theaters, and the like.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 4 ... Optical component housing, 7 ... Incident side polarizing plate (optical component), 8 ... Holding member, 9 ... Base member, 10 ... Clip (attached) 81 ... holding member main body, 82 ... sliding part, 91 ... fixing part, 92 ... projecting part, 93 ... opposing part, 433A ... upper surface (supporting surface) , 811 ... opening for passage, 913 ... insertion hole, 921 ... first surface, 922 ... second surface, 931 ... notch for bonding.

Claims (7)

A holding member for holding an optical component;
An optical component housing in which the optical component is stored;
A base member fixed to the outer surface of the optical component casing and fixing the holding member to the optical component casing;
On the outer surface of the optical component casing,
A support surface for slidably supporting the holding member is formed;
The holding member is
A holding member main body for holding the optical component;
Projecting to the outside of the optical component housing, and provided with a sliding portion supported by the support surface,
The base member is
A fixing portion fixed to the outer surface of the optical component housing;
A projecting portion projecting so as to be integrally formed with an end edge of the fixed portion so as to be substantially orthogonal to the fixed portion;
An opposing portion that faces the support surface across the sliding portion ,
The projector further comprising an urging member that sandwiches the holding member main body and the protruding portion and urges the holding member main body toward the protruding portion . The projector according to claim 1.
The facing portion is
A projector that contacts the sliding portion and urges the sliding portion toward the support surface. The projector according to claim 1 or 2,
In the facing part,
A projector having an adhesive notch for applying an adhesive. The projector according to any one of claims 1 to 3 ,
The surface of the protrusion that faces the holding member body is
A first surface that contacts the holding member body;
A second surface positioned on a side away from the holding member body with respect to the first surface when the protrusion is viewed from a side;
The second surface is
A projector characterized in that the projector is connected to the outer edge of the protruding portion. The projector according to claim 4 ,
The protrusion is
Connected to the fixed part,
Between the protrusion and the fixed part,
An insertion hole that allows the sliding portion to be inserted is formed,
The facing portion is
A projector provided at an edge portion of the insertion hole.


The projector according to claim 4 or 5,
It said biasing member, you biases the holding member body toward the first surface
A projector characterized by that. The projector according to any one of claims 4 to 6,
The holding member body is
It is formed in a frame shape having a passage opening for passing the light beam,
The protrusion is
The projector, wherein the projector is positioned between the sliding portion and the passage opening portion when viewed from a direction along an optical axis of a light beam incident on the optical component.

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