WO2018227787A1

WO2018227787A1 - Lens module, light source system and projection device

Info

Publication number: WO2018227787A1
Application number: PCT/CN2017/100587
Authority: WO
Inventors: 付锦江; 胡飞; 杜伦春; 李屹
Original assignee: 深圳市光峰光电技术有限公司
Priority date: 2017-06-15
Filing date: 2017-09-05
Publication date: 2018-12-20
Also published as: CN206930816U

Abstract

A lens module (100), a light source system and a projection device. The lens module (100) comprises a lens holder (15), a first lens group (11), a second lens group (12), a first elastic member (13), and a second elastic member (14). The lens holder (15) at least comprises a first accommodation portion (151) and a second accommodation portion (152). The first lens group (11) is provided in the first accommodation portion (151). The first elastic member (13) is fixed on an upper surface of the first accommodation portion (151) and abuts against the first lens group (11), and fixes the first lens group (11) in the first accommodation portion (151). The second lens group (12) is provided in the second accommodation portion (152). The second elastic member (14) is fixed on an upper surface of the second accommodation portion (152) and abuts against the second lens group (12), and fixes the second lens group (12) in the second accommodation portion (152). In the lens module (100), different elastic members are correspondingly provided for different lens groups, ensuring that the lens module (100) can withstand a high impact and a high/low temperature, so that the lens module (100) is not easily damaged and has high reliability.

Description

Lens module, light source system, and projection device

Technical field

The utility model relates to the technical field of optical systems, in particular to a lens module, a light source system and a projection device.

Background technique

Different lenses are combined based on optical principle to form a lens module, which can change light to achieve certain functions. For example, in projection technology, light emitted by a light source is projected onto a screen through a lens module, thereby realizing projection display.

technical problem

Lens modules may be used in a variety of different working environments, generally required to withstand high shock vibrations, and also need to withstand severe high/low temperature, while in the prior art lens modules cannot withstand high shock vibration due to structural constraints or Severe high and low temperature, easy to damage, and low reliability.

Technical solution

The utility model provides a lens module, a light source system and a projection device, so as to solve the problem that the lens module is easily damaged and the reliability is not high in the prior art.

In order to solve the above technical problem, the present invention provides a lens module including a lens holder, a first lens group, a second lens group, a first elastic member and a second elastic member, and the lens holder includes at least a first receiving portion. And a second accommodating portion; the first lens group is disposed in the first accommodating portion; the first elastic member is fixed on the upper surface of the first accommodating portion, abuts the first lens group, and fixes the first lens group at the first The second lens group is disposed in the second accommodating portion; the second elastic member is fixed on the upper surface of the second accommodating portion, abuts the second lens group, and fixes the second lens group in the second accommodating portion .

To solve the above technical problem, the present invention provides a light source system including the above lens module.

In order to solve the above technical problems, the present invention provides a projection apparatus including the above light source system.

Beneficial effect

In the lens module of the present invention, the elastic member abuts against the lens group, so that the lens group can eliminate a part of the force through the elastic member when subjected to vibration shock or deformation due to temperature, thereby ensuring that the lens group is not excessively stressed. And there is damage. There may be multiple lens groups in the lens module, and the force that the lens group is further away from the elastic member can eliminate the smaller force. Therefore, in the present invention, two elastic members are respectively disposed for two different lens groups, so that the lens groups can partially eliminate a part of the force through their corresponding elastic members. Therefore, the lens module can withstand high impact or high/low temperature, so that the lens module is not easily damaged and has high reliability.

DRAWINGS

1 is a schematic structural view of an embodiment of a lens module of the present invention;

Figure 2 is an exploded view of the lens module of the embodiment shown in Figure 1;

3 is a schematic structural view of a first elastic member in the lens module of the embodiment shown in FIG. 1;

4 is a schematic structural view of a second elastic member in the lens module of the embodiment shown in FIG. 1;

5 is a schematic structural view of a second spacing portion in the lens module of the embodiment shown in FIG. 1;

BEST MODE FOR CARRYING OUT THE INVENTION

The lens module of the present invention, that is, a plurality of lenses are placed in the lens holder, the arrangement of the relative positions of the plurality of lenses is realized by the structure of the lens holder, and the elastic members are utilized to cope with the impact deformation. More specifically, the plurality of lenses in the lens holder can be divided into a plurality of lens groups, and one elastic member is correspondingly disposed for each lens group. In the following, the case where the plurality of lenses in the lens holder are divided into two lens groups will be described as an example, but the present invention is not limited to the case of two lens groups, and may be three lens groups or more lens groups, all of which may be Embodiments of the two lens groups are inferred.

1 and FIG. 2, FIG. 1 is a schematic structural view of an embodiment of a lens module of the present invention, and FIG. 2 is an exploded view of the lens module of the embodiment shown in FIG. The lens module 100 of the present embodiment includes a first lens group 11, a second lens group 12, a first elastic member 13, a second elastic member 14, and a lens holder 15.

Wherein, the combination of the first lens group 11 and the second lens group 12 can change light, thereby implementing certain functions of the lens module 100. In this embodiment, the lens module 100 is applicable to an optical system of a projection device, and the first lens group 11 and the second lens group 12 are configured to change an optical path of the light emitted by the projection device, thereby The exiting light is projected at the specified position. In this embodiment, the first lens group 11 and the second lens group 12 are coaxially arranged to collect and emit light. In other embodiments, the lens group may not be limited to be coaxially disposed.

Further, the first lens group 11 of the present embodiment includes a first lens 111 and a second lens 112, and the second lens group 12 includes a third lens 121 and a fourth lens 122. The first lens 111, the second lens 112, the third lens 121, and the fourth lens 122 are coaxially disposed, and the radius sizes of the first lens 111, the second lens 112, the third lens 121, and the fourth lens 122 are sequentially decreased. In the application of the projection device light source system, the light emitted by the light source is sequentially emitted through the fourth lens 122, the third lens 121, the second lens 112, and the first lens 111 to effect projection.

The lens holder 15 of the accommodating lens group includes at least a first accommodating portion 151 and a second accommodating portion 152. The first lens group 11 is disposed in the first accommodating portion 151, and the second lens group 12 is disposed in the first The second housing portion 152 is inside.

Specifically, the first lens 111 of the first lens group 11 is located at the top of the first accommodating portion 151 , and the second lens 112 is located at the bottom of the first accommodating portion 151 .

The first accommodating portion 151 is a cylindrical structure having two ends open, and includes a first opening 1511 and a second opening 1512 opposite to each other, and a radius of the first opening 1511 is larger than a radius of the second opening 1512. The first lens 111 is received in the first opening 1511 , and the second lens 112 is received in the second opening 1512 .

A first partition portion 113 is further disposed on the inner side of the first accommodating portion 151 , and the first partition portion 113 is radially facing the first accommodating portion 151 by the inner peripheral wall of the first accommodating portion 151 . The center position extends, and a size of a portion of the first spacer 113 close to the second opening 1512 is larger than a size of a portion of the first spacer 113 close to the first opening 1511. A first platform 1513 is further disposed at a position of the first receiving portion 11 adjacent to the second opening 1512. The second lens 112 is placed on the first platform 1513, and the two ends of the first spacing portion 151 are respectively resisted. The first lens 111 and the second lens 112.

The first spacer 113 is located between the first lens 111 and the second lens 112, and the distance between the first lens 111 and the second lens 112 can be controlled by the first spacer 113. The first lens 111 is placed on the first spacer 113, and the upper surface 1111 of the first lens 111 is in contact with the upper surface 1514 of the first receiving portion 151 at the edge of the upper surface of the first lens 111, on the first lens 111. The surface 1111 is a curved surface, that is, the edge of the upper surface 1111 of the first lens 111 is flush with the upper surface 1514 of the first receiving portion 151.

For the second lens group 12, the third lens 121 is located at the top of the second accommodating portion 152, and the fourth lens 122 is located at the bottom of the second accommodating portion 152.

The second accommodating portion 152 is a cylindrical structure that is open at both ends, and includes a first accommodating space 1521 and a second accommodating space 1522. The radius of the first accommodating space 1521 is larger than the radius of the second accommodating space 1522. The third lens 121 is received in the first housing space 1521 , and the fourth lens 122 is received in the second housing space 1522 .

The second spacer portion 123 is further disposed on the inner side of the second receiving space 1522. Referring to FIG. 5, FIG. 5 is a schematic structural view of the second spacer portion in the lens module of the embodiment shown in FIG. The inner peripheral wall of the space 1522 extends radially toward the center of the second receiving space 1522. The second partition portion 123 includes a ring main body 1231, and a plurality of extending portions 1232 extend inwardly from the ring main body 1231. There are three extensions 1232. A second platform 1523 is disposed at the bottom of the second receiving space 1522. The fourth lens 122 is placed on the second platform 1521. The plurality of extending portions 1232 of the second spacing portion 123 are resisted by the fourth lens 122. The third lens 121 is placed on the second lens 121. The second spacer 123 is located in the first receiving space 1521.

The second spacer 123 is located between the third lens 121 and the fourth lens 122, and the distance between the third lens 121 and the fourth lens 122 can be controlled by the second spacer 123. The upper surface 1211 of the third lens 121 is in contact with the upper surface 1524 of the second receiving portion 152 at the edge of the upper surface of the third lens 121. The upper surface 1211 of the third lens 121 is a curved surface, that is, the upper surface of the third lens 121. The edge of the surface 1211 is flush with the upper surface 1524 of the second receiving portion 152.

In order to enable the lens assembly to be stably fixed in the accommodating portion, the lens module 100 of the embodiment further includes a first elastic member 13 and a second elastic member 14. Referring to FIG. 3 and FIG. 4, FIG. 3 is a schematic structural view of a first elastic member in the lens module of the embodiment shown in FIG. 1. FIG. 4 is a schematic structural view of a second elastic member in the lens module of the embodiment shown in FIG.

The first elastic member 13 is fixed to the upper surface 1514 of the first accommodating portion 151 and abuts the first lens group 11 to fix the first lens group 11 in the first accommodating portion 151. Specifically, the first elastic member 13 includes a first main body portion 131 and a plurality of first abutting portions 132 extending inwardly from the first main body portion 131. The first main body portion 131 is fixed to the first receiving portion 151. The upper surface 1514 , the first abutting portion 132 abuts the first lens group 11 .

Further, in the embodiment, the first main body portion 131 is fixed to the upper surface 1514 of the first receiving portion 151 by screws, and the first abutting portion 132 abuts against the upper surface 1111 of the first lens 111 when the screw is locked. In the case of a main body portion 131, the first abutting portion 132 generates an axial force to the first lens 111, and the magnitude of the axial force depends on the magnitude of the screw locking force. Moreover, when the lens module 100 is externally impacted or at an extreme temperature, the lens may vibrate due to impact or deform due to temperature, and abut the first elastic member 13 of the first lens group 11 in the axial direction of the first lens 111. The force and its own elastic force can ensure that the first lens 111 does not deform or vibrate.

The first elastic member 13 directly acts on the first lens 111, and for the second lens 112, the transmission of the force is realized by the first spacing portion 113. In this embodiment, the second lens 112 is smaller in size than the first lens 111, and the first spacing portion 113 is a wedge-shaped structure with a narrow upper and lower width, and a wider portion of the first spacing portion 113 abuts against the second lens 112, so that the first The force of the elastic member 13 can be applied to the second lens 112 through the first spacer 113. Therefore, the axial force of the first elastic member 13 against the first lens group 11 and its own elastic force can also act on the second lens 112, thereby ensuring that the second lens 112 does not deform or vibrate.

In addition, in the embodiment, the first main body portion 131 of the first elastic member 13 is in the shape of an upper surface 1514 of the first receiving portion 151, and has an annular shape with an opening, and the first abutting portion 132 has three. And evenly distributed. The first elastic member 13 may be a stainless steel sheet.

In this embodiment, the second elastic member 14 is fixed to the upper surface 1524 of the second receiving portion 152 and abuts the second lens group 12 to fix the second lens group 12 in the second receiving portion 152. Specifically, the second elastic member 14 includes a second main body portion 141 and a plurality of second abutting portions 142 extending inwardly from the second main body portion 141 . The second main body portion 141 is fixed to the second receiving portion 152 . The upper surface 1524, the second abutting portion 142 abuts the second lens group 12.

Further, the second body portion 141 is also fixed to the upper surface 1524 of the second receiving portion 152 by screws, and the second abutting portion 142 abuts against the upper surface 1211 of the third lens 121. When the second body portion 141 is locked by the screw, the second abutting portion 142 generates an axial force on the third lens 121. The axial force depends on the screw locking force, the axial force and the second elastic member. The elastic force of the 14 itself can ensure that the third lens 121 does not deform or vibrate.

The second elastic member 14 directly acts on the third lens 121, and for the fourth lens 122, the transmission of the force is realized by the second spacer portion 123. In this embodiment, the size of the fourth lens 122 is smaller than that of the third lens 121, and the structure of the second spacer 123 is as shown in FIG. 5. The second spacer portion 123 is a ring structure having an extending portion 1232 inwardly and abutting on the fourth lens 122 such that the force of the second elastic member 14 can be applied to the fourth lens 122 through the second spacer portion 123. on. Therefore, the axial force of the second elastic member 14 to the second lens group 12 and its own elastic force can also be applied to the fourth lens 122, thereby ensuring that the fourth lens 122 does not deform or vibrate.

Further, in the present embodiment, the second main body portion 141 has an annular shape, and the second abutting portions 142 have three and are evenly distributed. A plurality of waist holes 143 are evenly distributed in the circumferential direction of the second body portion 141. In this embodiment, three waist holes 143 are evenly distributed. The waist holes 143 are disposed to ensure axial force and eliminate lens exposure. Radial force.

When the lens module 100 of the embodiment is applied to the optical system of the projection device, the second receiving portion 152 is located on the light incident side of the lens holder 15, that is, the light of the light source first passes through the second lens group 12, and the second elastic member The temperature and light intensity at 14 are relatively large. Therefore, in the embodiment, the second elastic member 14 is made of an aluminized steel sheet, and the thickness thereof can be set to a minimum of 0.35 mm.

The lens module having the above structure can withstand high impact or high/low temperature, is not easily damaged, and has high reliability. The lens module can be applied to a light source system. The present invention provides a light source system, including the lens module and the light source. The light source can be a laser light source or the like, and the light source is disposed on the light incident side of the lens module.

Further, the present invention also proposes a projection device that uses the above-described light source system. As can be seen from the above description, the projection device can withstand high impact vibration, harsh high/low temperature environment, is not easily damaged, and has high reliability.

The above is only the embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the utility model and the drawings, or directly or indirectly applied to other The related technical fields are all included in the scope of patent protection of the present invention.

Claims

1. A lens module, comprising: a lens holder, a first lens group, a second lens group, a first elastic member and a second elastic member, wherein the lens holder comprises at least a first receiving portion And a second housing portion;

The first lens group is disposed in the first accommodating portion; the first elastic member is fixed on an upper surface of the first accommodating portion, abuts the first lens group, and the first lens The group is fixed in the first receiving portion;

The second lens group is disposed in the second accommodating portion; the second elastic member is fixed to the upper surface of the second accommodating portion, abuts the second lens group, and the second lens The set is fixed in the second housing.

2. The lens module according to claim 1, wherein the first lens group and the second lens group are coaxially disposed.

3. The lens module according to claim 1, wherein the first lens group comprises a first lens and a second lens, and an upper surface of the first lens and an upper surface of the first housing portion are The edge of the upper surface of the first lens is in contact connection, and a first spacer is disposed between the first lens and the second lens;

The second lens group includes a third lens and a fourth lens, and an upper surface of the third lens is in contact with an upper surface of the second receiving portion at an edge of an upper surface of the third lens, A second spacer is disposed between the three lens and the fourth lens.

4. The lens module according to claim 3, wherein a radius dimension of the first lens, the second lens, the third lens, and the fourth lens is sequentially decreased.

5. The lens module according to claim 3, wherein the first spacer portion is disposed inside the first accommodating portion, and the inner peripheral wall of the first accommodating portion faces the radial direction a center of the first receiving portion extends; a size of a portion of the first spacing portion adjacent to the second lens is larger than a size of a portion of the first spacing portion adjacent to the first lens.

6. The lens module according to claim 3, wherein the second spacer portion is disposed inside the second accommodating portion, and the inner peripheral wall of the second accommodating portion faces the radial direction The center of the second receiving portion extends; the second spacing portion includes a ring body and a plurality of extensions extending inwardly from the ring body.

7. The lens module of claim 1 wherein:

The first elastic member includes a first main body portion and a plurality of first abutting portions extending inwardly from the first main body portion; the first main body portion is fixed to an upper surface of the first receiving portion The first abutting portion abuts the first lens group;

The second elastic member includes a second main body portion and a plurality of second abutting portions extending inwardly from the second main body portion; the second main body portion is fixed to an upper surface of the second receiving portion The second abutting portion abuts the second lens group.

8. The lens module according to claim 7, wherein the second body portion has an annular shape, and the second body portion is uniformly distributed with a plurality of waist holes in a circumferential direction.

9. The lens module according to claim 7, wherein the second receiving portion is located on a light incident side of the lens holder, and the second elastic member is an aluminum plated steel sheet.

10. The lens module according to claim 7, wherein the first body portion is an annular shape having an opening, and the first elastic member is a stainless steel sheet.

A light source system, comprising the lens module according to any one of claims 1 to 10.

12. A projection apparatus, characterized in that the projection apparatus comprises the light source system of claim 11.