CN216979400U - Optical module and projector - Google Patents

Abstract

The application discloses an optical module and a projector. The optical module includes: the bearing part is provided with an accommodating groove, and a first positioning part and a second positioning part which are distributed at intervals and are arranged oppositely are arranged in the accommodating groove; the optical element is arranged in the accommodating groove and provided with two first sides and two second sides, each first side extends along a first direction, each second side extends along a second direction, one of the two second sides is provided with a first matching part, the first matching part is matched with the first positioning part, the other of the two second sides is provided with a second matching part, and the second matching parts are matched with the second positioning parts and can relatively displace along the second direction; the limiting piece is arranged on the bearing piece and close to the second positioning portion, one part of the limiting piece extends along the first direction and is abutted against the first side edge, and the other part of the limiting piece extends along the second direction and is abutted against the second side edge.

Description

Optical modules and projectors

technical field

The application belongs to the field of optical technology, and in particular, the application relates to an optical module and a projector having the optical module.

Background technique

With the development of micro projector technology, more and more home projectors have entered people's field of vision. Projectors are also developing in the direction of miniaturization and portability.

Most of the micro projectors use DLP technology for DMD (Digital Micromirror Device) imaging, in which the DMD is smaller in size and has a greater impact on imaging. Therefore, in the DLP micro projector, high requirements are placed on the placement of the DMD.

However, the existing DMD is prone to shaking, which will cause poor resolution and dark bands. Therefore, how to solve the problems of poor positioning accuracy and positioning reliability for the DMD is imminent.

Utility model content

An object of the present application is to provide an optical module that can solve the problems of poor positioning accuracy and positioning reliability of the DMD.

Another object of the present application is to provide a projector.

According to a first aspect of the present application, an optical module is provided, comprising: a carrier, the carrier has a receiving groove, and the receiving groove is provided with a first positioning part and a second positioning part which are spaced apart and oppositely arranged part; an optical element, the optical element is arranged in the accommodating groove, the optical element has two first side edges and two second side edges, each of the first side edges extends along a first direction, each The second side edge extends along the second direction, one of the two second side edges is provided with a first matching portion, the first matching portion is matched with the first positioning portion, and two of the second side edges are provided with a first matching portion. The other of the two side edges is provided with a second matching portion, the second matching portion is matched with the second positioning portion and can be relatively displaced along the second direction; a limiting member, the limiting member The part is arranged on the carrier and is close to the second positioning part, a part of the limiter extends along the first direction and stops against the first side edge, and another part of the limiter is along the The second direction extends and abuts against the second side edge.

Optionally, the accommodating groove has at least one apex angle, wherein one of the apex corners is close to the second positioning portion, and the position-limiting member is arranged at the apex angle position.

Optionally, the limiting member includes: a first segment body, the first segment body extending along the first direction and abutting against the first side edge; a second segment body, the second segment body Extending along the second direction and abutting against the second side, the first segment body and the second segment body are arranged perpendicular to each other; the third segment body, the third segment body and the The first segment body and the second segment body are connected, and the included angles between the third segment body and the first segment body and the second segment body respectively are obtuse angles.

Optionally, the limiting member is an integral molded part.

Optionally, the limiting member is an elastic deformation member.

Optionally, the carrier is provided with an installation part, an installation groove is defined between the installation part and the bottom wall of the accommodating groove or in the installation part, and at least a part of the limiting member is located in the installation groove ; a part of the mounting part extends along the first direction, and abuts against the part of the limiter extending along the first direction; another part of the mounting part extends along the second direction, and the portion extending along the second direction on the limiting member stops abutting.

Optionally, at least a part of the first positioning portion is located in the accommodating groove, the outer surface of the first positioning portion has an arc surface, the first matching portion is a groove, and the first matching portion is The inner wall surface is tangent to the outer surface of the first positioning portion.

Optionally, the cross-section of the first matching portion is an inverted trapezoidal groove, the cross-section of the second matching portion is a rectangular groove, at least a part of the second positioning portion is a rectangular piece, and the second positioning portion The dimension along the second direction is smaller than the dimension along the second direction of the second fitting portion.

Optionally, one end of the second positioning portion along the first direction has a protruding portion protruding from the surface thereof, and the protruding portion abuts with the second matching portion.

Yet another aspect of the present application further provides a projector, including the optical module of any of the foregoing embodiments.

A technical effect of the present application is that, by using a carrier, an optical element and a limiter to cooperate, precise positioning of the optical element can be achieved.

Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application.

1 is a schematic three-dimensional structure diagram of an optical module provided by the present application;

Fig. 2 is the enlarged view of A area in Fig. 1;

3 is a schematic diagram of an angle of an optical module provided by the present application;

4 is a schematic partial structure diagram of an angle of an optical module provided by the present application;

Fig. 5 is the enlarged view of B area in Fig. 4;

6 is a schematic partial structure diagram of another angle of the optical module provided by the present application;

FIG. 7 is a schematic three-dimensional structural diagram of a limiting member of an optical module provided by the present application.

reference number

an optical module 100;

The carrier 10; the receiving groove 11; the first positioning part 12; the second positioning part 13; the mounting part 14; the mounting groove 15; the protruding part 16;

Optical element 20; first side edge 21; first matching portion 22; second side edge 23; second matching portion 24;

Limiting member 30 ; first segment body 31 ; second segment body 32 ; third segment body 33 .

Detailed ways

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

In all examples shown and discussed herein, any specific values should be construed as illustrative only and not limiting. Accordingly, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

The optical module 100 according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 to 7 , an optical module 100 according to an embodiment of the present application includes a carrier 10 , an optical element 20 and a limiting member 30 .

Specifically, the carrier 10 has an accommodating groove 11 , and the accommodating groove 11 is provided with a first positioning portion 12 and a second positioning portion 13 that are spaced apart and disposed opposite to each other. The optical element 20 is arranged in the accommodating groove 11. The optical element 20 has two first side edges 21 and two second side edges 23. Each first side edge 21 extends along the first direction, and each second side edge 23 extends along the first direction. Extending in the second direction, one of the two second side edges 23 is provided with a first matching portion 22 , the first matching portion 22 is matched with the first positioning portion 12 , and the other of the two second side edges 23 is provided with a first matching portion 22 . The second matching portion 24 is matched with the second positioning portion 13 and is capable of relative displacement along the second direction. The limiting member 30 is disposed on the carrier 10 and is close to the second positioning portion 13 , a part of the limiting member 30 extends along the first direction and abuts against the first side 21 , and another portion of the limiting member 30 extends along the second direction and contact with the second side edge 23 .

In other words, the optical module 100 according to the embodiment of the present application is mainly composed of the carrier 10 , the optical element 20 and the limiting member 30 . Wherein, an accommodating groove 11 is defined on the carrier 10 , and an optical element 20 can be installed in the accommodating groove 11 . Optical element 20 may be a digital micromirror device (DMD). It should be noted that the accommodating groove 11 may be directly opened on the surface of the carrier 10 , or other matching structures may be provided on the carrier 10 to define the accommodating groove 11 together with the carrier 10 through other matching structures. That is to say, the specific forming manner of the accommodating groove 11 is not limited.

The optical element 20 has two first sides 21 and two second sides 23 . Each of the first side edges 21 extends along the first direction, and each of the second side edges 23 extends along the second direction. The first direction is not parallel to the second direction. For example, the first direction is a vertical direction, and the second direction is a horizontal direction.

A first matching portion 22 is provided on one second side edge 23 , and a second matching portion 24 is provided on the other second side edge 23 . The carrier 10 is provided with a first positioning portion 12 and a second positioning portion 13 . The first positioning portion 12 and the first matching portion 22 are disposed opposite to and cooperate with each other. The second positioning portion 13 and the second matching portion 24 are disposed opposite to and cooperate with each other. For example, the first matching portion 22 is positioned above the second matching portion 24 , and the first positioning portion 12 is positioned above the second positioning portion 13 . When the optical element 20 is installed on the carrier 10, the optical element 20 is installed in the accommodating groove 11, the first matching portion 22 is matched with the first positioning portion 12, and the second matching portion 24 is matched with the second matching portion 24. The positioning portion 13 is matched. Further, the first positioning portion 12 is located just above the second positioning portion 13 .

When the first matching part 22 is matched with the first positioning part 12 , the first matching part 22 and the first positioning part 12 can realize the limitation of one degree of freedom of the optical element 20 , for example, the first matching part and the first positioning part The portion 12 is located at the upper end of the optical element 20 and can limit the position of the optical element 20 in the upward direction.

When the second matching portion 24 is matched with the second positioning portion 13 , another degree of freedom of the optical element 20 can be defined. For example, the second matching portion 24 and the second positioning portion 13 are located at the lower end of the optical element 20 , which can limit the position of the optical element 20 in the downward direction. In addition, relative displacement can occur between the second matching portion 24 and the second positioning portion 13 along the second direction. That is to say, the preliminary positioning of the optical element 20 can be achieved by the first matching portion 22 being matched with the first positioning portion 12 and the second matching portion 24 being matched with the second positioning portion 13 .

A limiter 30 is also installed on the carrier 10 , and optionally, the limiter 30 is detachably connected to the carrier 10 . The limiting member 30 and the second positioning portion 13 may be located on the same side of the optical element 20 . For example, the optical element 20 extends in the up-down direction.

Since a part of the limiting member 30 extends along the first direction and abuts against the first side edge 21 , a force along the second direction is applied to the first side edge 21 . Another part of the limiting member 30 extends along the second direction and abuts against the second side edge 23 to apply a force along the first direction to the second side edge 23 . The direction of the resultant force of the first direction and the second direction is the diagonal direction of the included angle between the first side edge 21 and the second side edge 23, which can complete the precise positioning of the optical element. That is, the position of the optical element 20 can be further limited by the limiting member 30 , so as to realize the precise positioning of the optical element 20 .

Therefore, according to the optical module 100 according to the embodiment of the present application, by using the carrier 10 , the optical element 20 and the limiter 30 to cooperate, precise positioning of the optical element 20 can be achieved.

According to an embodiment of the present application, the accommodating groove 11 has at least one vertex angle, wherein one vertex angle is close to the second positioning portion 13 , and the limiting member 30 is provided at the vertex angle position. That is to say, as shown in FIG. 1 , the accommodating groove 11 has at least one apex angle. For example, when the accommodating groove 11 is substantially a rectangular groove or a trapezoidal groove, the accommodating groove 11 has four apex angles; when the accommodating groove 11 is substantially a triangular groove , the accommodating groove 11 has three top corners.

By arranging the limiting member 30 at the top corner position, the carrier 10 or other structures near the top corner position can have a limiting effect on the limiting member 30 . For example, a part of the limiting member 30 extends along the first direction, and when the limiting member 30 exerts a force in the second direction on the first side 21 , the limiting member 30 can also receive the limiting action along the second direction. Similarly, another part of the limiting member 30 can be subjected to the limiting action along the first direction.

In addition, by arranging the limiting member 30 at a position close to the top corner of the second positioning portion 13, the limiting member 30, the second matching portion 24 and the second positioning portion 13 can be matched together. Specifically, during the initial positioning , the positions of the second matching portion 24 and the second positioning portion 13 correspond to each other. When performing precise positioning, a force in the second direction is applied to the optical element 20 through the limiting member 30 to drive the relative movement between the second matching portion 24 and the second positioning portion 13 in the second direction until the second The matching portion 24 and the second positioning portion 13 abut against each other in the second direction to achieve precise positioning of the optical element 20 .

According to an embodiment of the present application, as shown in FIG. 3 , the shape of the receiving groove 11 is consistent with the shape of the optical element 20 . For example, the approximate shape of the inner contour of the accommodating groove 11 is a rectangle, and the approximate shape of the outer contour of the optical element 20 is also a rectangle.

In this embodiment, by setting the shape of the accommodating groove 11 to be consistent with the shape of the optical element 20 , the miniaturized design of the optical module 100 is facilitated, and the quick installation of the optical element 20 is facilitated.

In some specific embodiments of the present application, as shown in FIG. 3 , the shape of the accommodating groove 11 is a rectangle, that is, the cross-section of the accommodating groove 11 is a rectangle, and the cross-section here refers to the cross-section of the plane along the first direction. . The rectangle can be a rectangle or a square. The rectangle has four vertices distributed along the diagonal, and the limiting member 30 is located in any one of the two vertices close to the second positioning portion 13 . By adopting the rectangular accommodating groove 11 , the existing optical element 20 can be adapted, and the application scene is expanded.

For example, the optical element 20 extends in the up-down direction, that is, the first direction is the up-down direction, and the second direction is the left-right direction. The four top corners are divided into top left top corner, top right top corner, bottom left top corner and bottom right top corner. The second matching portion 24 and the second positioning portion 13 are located between the lower left vertex and the lower right vertex. The first matching portion 22 and the first positioning portion 12 are located between the upper left corner and the upper right corner. By arranging the limiting member 30 at the lower left apex or the lower right apex, the relative movement in the second direction between the second matching portion 24 and the second positioning portion 13 can be realized, and finally the second matching portion 24 and the first The stop between the two positioning parts 13 .

In addition, when the shape of the optical element 20 matches the shape of the accommodating groove 11 , and when the accommodating groove 11 is a rectangular groove, the optical element 20 is also a rectangular body. At this time, the first side of the optical element 20 extends along the first direction, and the second side of the optical element 20 extends along the second direction. Since the first side and the second side are perpendicular to each other, the first direction and the second direction are also perpendicular to each other.

According to an embodiment of the present application, as shown in FIG. 7 , the limiting member 30 includes a first segment body 31 , a second segment body 32 and a third segment body 33 . The first segment body 31 extends along the first direction and is connected to the first segment body 31 . One side edge 21 stops, the second segment extends along the second direction and stops with the second side edge 23, the first segment body 31 and the second segment body 32 are perpendicular to each other, and the third segment body 33 is respectively connected to the first segment body 33. The body 31 and the second segment body 32 are connected, and the included angles between the third segment body 33 and the first segment body 31 and the second segment body 32 respectively are obtuse angles.

In this embodiment, by arranging the first segment body 31 and the second segment body 32 to be vertically arranged, the first side surface and the second side surface which are also vertically arranged can have a resisting effect at the same time.

In addition, by providing the third segment body 33 between the first segment body 31 and the second segment body 32 , the connection between the first segment body 31 and the second segment body 32 can be realized. Further, the side of the third segment body 33 away from the first segment body 31 and the second segment body 32 is an inclined surface, that is, there is an included angle between the third segment body 33 and the second direction. When the third segment body 33 is not provided, when the stopper 30 is arranged at the corresponding position on the carrier 10, it will cause obstacles to the installation of the stopper 30, and after the stopper 30 is installed, the stopper 30 is installed. 30 is easily displaced under the action of the sharp corner of the connection position between the first segment body 31 and the second segment body 32 . In this embodiment, by using the third segment body 33 , the installation efficiency and installation stability of the stopper 30 can be improved.

In some specific embodiments of the present application, as shown in FIG. 7 , the limiting member 30 is an integral molded part. By adopting the one-piece molded part, it is not only possible to apply force to the first side 21 and the second side 23 at the same time, but also has the advantages of convenient installation and manufacture, improved installation efficiency, simplified structure, and the like.

According to an embodiment of the present application, as shown in FIG. 5 , the carrier 10 is provided with a mounting portion 14 , and a mounting groove 15 is defined between the mounting portion 14 and the bottom wall of the accommodating groove 11 or in the mounting portion 14 . At least a portion of 30 is located within mounting groove 15 . When a mounting groove 15 is formed between the mounting portion 14 and the bottom wall of the accommodating groove 11 , an opening groove may be formed between the mounting portion 14 and the bearing portion, and the opening groove is the mounting groove 15 . Further, the mounting portion 14 is a component on the carrier 10 , and the two materials are the same, and can be produced by an integral molding process. Further, along the direction from the optical element 20 to the bottom wall of the accommodating groove 11 , for example, when the optical element 20 extends in the up-down direction, along the horizontal plane and toward the bottom wall of the accommodating groove 11 , the size of the mounting portion 14 gradually shrink. The inner end of the mounting portion 14 is connected to the vicinity of the bottom wall of the accommodating groove 11 , and the outer end of the mounting portion 14 is spaced from the bottom wall of the accommodating groove 11 , and a mounting groove 15 is formed. By providing the mounting portion 14 with an inverted trapezoidal cross-section, the mounting groove 15 can be formed, and the stopper 30 can be pressed and fixed.

In the present embodiment, by disposing the mounting groove 15 on the mounting portion 14, or forming the mounting groove 15 under the cooperation of the carrier 10 and the mounting portion 14, and using the mounting groove 15 to install the limiting member 30, it is possible to realize the limited The installation and limit of the piece 30. During installation, the limiting member 30 can be placed in the installation groove 15 to determine the position of the limiting member 30 . When the limiting member 30 is a silica gel column, the compression direction and compression amount of the silica gel column can also be determined. In addition, the silica gel column can be further compressed by the mounting portion 14 , and the silica gel column can be prevented from being pushed out of the mounting groove 15 .

According to an embodiment of the present application, as shown in FIGS. 4 and 5 , a portion of the mounting portion 14 extends along the first direction, and abuts against the portion of the limiting member 30 that extends along the first direction. Another portion of the mounting portion 14 extends along the second direction and abuts against the portion of the limiting member 30 that extends along the second direction. The positioning part 30 can be positioned in the first direction and the second direction at the same time by the installation part 14 .

In some specific embodiments of the present application, as shown in FIGS. 1 and 4 , the limiting member 30 is detachably connected to the carrier 10 , and the limiting member 30 can be replaced.

According to an embodiment of the present application, the limiting member 30 is an elastic deformation member. By using the elastic deformation member, the force acting on the optical element 20 in the first direction and the second direction can be improved, thereby improving the positioning effect of the optical element 20 .

According to an embodiment of the present application, the limiting member 30 is a silica gel member, such as a silica gel column. Silicone has a certain hardness and elastic deformation characteristics. In this embodiment, by using a silicone piece, the positioning effect for the optical element 20 can be further improved. Further, the hardness of the silica gel column is 50°±5°, and by adopting the hardness in this range, it can be compressed while maintaining a certain elasticity. When the silica gel column is inserted into the carrier 10, it is an interference fit with other structures, the silica gel column is squeezed and elastically deformed, and the optical element is squeezed diagonally to complete the precise positioning of the optical element and ensure the optical element. No shaking occurs.

In some specific embodiments of the present application, at least a part of the first positioning portion 12 is located in the accommodating groove 11 , the outer surface of the first positioning portion 12 has an arc surface, the first matching portion 22 is a groove, and the first matching portion 22 The inner wall surface is tangent to the outer surface of the first positioning portion 12 . For example, when the optical element 20 extends in the up-down direction, the first positioning portion 12 is located above the optical element 20, and the lower end of the first positioning portion 12 has an arc-shaped surface with an upward opening and an upward bending direction. For example, the lower surface of the first positioning portion 12 is a cylindrical surface. The first matching portion 22 is disposed at the upper end of the optical element 20, the first matching portion 22 is an open groove, and at least a part of the inner surface of the first matching portion 22 and the lower surface of the first positioning portion 12 is tangent, and the optical element The optical element 20 can move around the connection position between the first matching portion 22 and the first positioning portion 12 , so as to facilitate the adjustment and positioning of the position of the optical element 20 .

According to an embodiment of the present application, as shown in FIG. 3 , the cross section of the first matching portion 22 is an inverted trapezoidal groove. The section of the first matching portion 22 along the plane in the first direction is a cross section. The size of the upper end of the first matching portion 22 along the second direction is larger than the size of the lower end of the first matching portion 22 along the second direction.

In some specific embodiments of the present application, as shown in FIG. 3 , the cross-section of the second matching portion 24 is a quasi-rectangular groove, at least a part of the second positioning portion 13 is a rectangular piece, and the second positioning portion 13 extends along the second direction. The size is smaller than the size of the second fitting portion 24 in the second direction. The cross section of the second matching portion 24 here is a sectional view of the plane where the second matching portion 24 is located along the first direction. The rectangular groove has left and right side walls along the second direction, and the second positioning portion 13 is located between the left and right side walls. When the limiting member 30 exerts a leftward partial force on the optical element 20 , the second positioning portion 13 can be driven to move leftward until the right side of the second positioning portion 13 abuts against the right side wall.

According to an embodiment of the present application, as shown in FIG. 2 , one end of the second positioning portion 13 along the first direction has a protruding portion 16 protruding from the surface thereof, and the protruding portion 16 abuts with the second matching portion 24 . For example, the upper end surface of the second positioning portion 13 extends in the second direction, and the protruding portion 16 extends in the first direction. In this embodiment, by providing the protruding portion 16, the contact area between the second positioning portion 13 and the optical element 20 can be reduced, so as to avoid the difficulty in positioning the position of the optical element 20 caused by the excessive contact area between the two. question.

All in all, the optical module according to the embodiment of the present application has the advantages of simple positioning structure and accurate positioning of the optical element.

Embodiments of the present application also provide a projector, where the projector includes the optical module according to any of the foregoing embodiments. The projector may be a pico projector. Since the optical module has the advantages of accurate positioning and the like, the projector of the present application also has the above advantages, which will not be repeated here.

Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims (10)

1. an optical module, is characterized in that, comprises: a carrier, the carrier has an accommodating groove, and the accommodating groove is provided with a first positioning portion and a second positioning portion that are spaced apart and arranged oppositely; an optical element, the optical element is arranged in the accommodating groove, the optical element has two first side edges and two second side edges, each of the first side edges extends along a first direction, and each of the The second side edge extends along the second direction, one of the two second side edges is provided with a first matching portion, the first matching portion is matched with the first positioning portion, and the two second side edges are provided with a first matching portion. The other one of the sides is provided with a second matching portion, the second matching portion is matched with the second positioning portion and can be relatively displaced along the second direction; A limiter, the limiter is set on the carrier and close to the second positioning portion, a part of the limiter extends along the first direction and abuts against the first side edge, so Another part of the limiting member extends along the second direction and abuts against the second side edge. 2 . The optical module according to claim 1 , wherein the accommodating groove has at least one apex angle, wherein one of the apex angles is close to the second positioning portion, and the position-limiting member is provided on the top. 3 . corner position. 3. The optical module according to claim 1, wherein the limiting member comprises: a first segment body, the first segment body extends along the first direction and abuts against the first side edge; a second segment body, the second segment extends along the second direction and abuts against the second side edge, and the first segment body and the second segment body are perpendicular to each other; A third segment body, the third segment body is respectively connected with the first segment body and the second segment body, and the angle between the third segment body and the first segment body and the second segment body is respectively is an obtuse angle. 4 . The optical module according to claim 1 or 3 , wherein the limiting member is an integral molded part. 5 . 5 . The optical module according to claim 1 , wherein the limiting member is an elastic deformation member. 6 . 6 . The optical module according to claim 1 , wherein the carrier is provided with a mounting portion, and a mounting groove is defined between the mounting portion and the bottom wall of the accommodating groove or in the mounting portion, and the At least a part of the limiting member is located in the installation groove; A part of the mounting portion extends along the first direction and stops with the portion of the limiting member extending along the first direction; another portion of the mounting portion extends along the second direction, and Abutting against the portion of the limiting member extending along the second direction. 7 . The optical module according to claim 1 , wherein at least a part of the first positioning portion is located in the accommodating groove, an outer surface of the first positioning portion has an arc surface, and the first matching portion The part is a groove, and the inner wall surface of the first matching part is tangent to the outer surface of the first positioning part. 8 . The optical module according to claim 7 , wherein the cross-section of the first matching portion is an inverted trapezoidal groove, the cross-section of the second matching portion is a rectangular groove, and the second positioning portion has a cross-section. At least a part is a rectangular piece, and the size of the second positioning portion along the second direction is smaller than the size of the second matching portion along the second direction. 9 . The optical module according to claim 1 , wherein one end of the second positioning portion along the first direction has a protruding portion protruding from the surface thereof, and the protruding portion is in contact with the second matching portion. 10 . catch. 10. A projector, characterized by comprising the optical module according to any one of claims 1-9.

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