Lens module

Abstract

The invention discloses a lens module. The lens module comprises a shell, an image sensor, a long-focus lens, a first light path changing element, a short-focus lens and a second light path changing element, the image sensor is arranged on the side of the shell; the telephoto lens is arranged above the shell; the first light path changing element is arranged in the shell and is used for changing the path of the first light beam passing through the telephoto lens to face the image sensor; the short-focus lens is arranged above the shell and between the image sensor and the long-focus lens; and the second light path changing element is arranged in the shell and is suitable for being switched between a first position and a second position.

Description

Technical Field

[0001] The present invention relates to an optical device, and particularly to a lens module. Background Art

[0002] The principle of focal length modulation is to adjust the distance between the lens and the photosensitive element (or the human eye) to achieve a change in the focal length, thereby changing the imaging effect.

[0003] Figure 1 The following is a comparison diagram of the imaging effects of a prior art telephoto lens and a short focal length lens. Please refer to Figure 1 Figure 1 . The telephoto lens 90 has a focal length F1, and the short focal length lens 91 has a focal length F2. The lens 90 is suitable for shooting distant scenes or local details, such as a specific person among a crowd. In contrast, the lens 91 is suitable for shooting close-up scenes or a wide-angle range, such as a complete crowd. As Figure 1 shown, the length of the focal length F1 is greater than the length of the focal length F2, which results in that under different optical application conditions, the optical device must perform focal length modulation to achieve multi-focal length imaging.

[0004] Existing optical devices usually adopt the method of moving the lens or the photosensitive element to perform focal length modulation. However, this design requires a complex motor mechanism to drive the movement of the lens or the photosensitive element. Generally speaking, such a complex motor mechanism needs to occupy a large space, and such a space requirement constitutes a significant limitation for electronic products pursuing a thin and light design, such as smart phones or other portable electronic products.

[0005] Therefore, how to reduce the structural volume without sacrificing optical performance to achieve multi-focal length imaging is a major challenge in the field of optical device design. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a lens module, which solves the problem in the prior art that a complex motor mechanism needs to be installed to drive the movement of the lens.

[0007] In view of this, the applicant proposes a lens module, which includes a housing, an image sensor, a telephoto lens, a first optical path changing element, a short-focus lens, and a second optical path changing element. The image sensor is disposed on the side of the housing; the telephoto lens is disposed above the housing; the first optical path changing element is disposed inside the housing for changing the path of a first light beam passing through the telephoto lens and directing it towards the image sensor; the short-focus lens is disposed above the housing and between the image sensor and the telephoto lens; and the second optical path changing element is disposed inside the housing and is adapted to switch between a first position and a second position. The second optical path changing element in the first position allows the first light beam to be directed towards the image sensor, and the second optical path changing element in the second position is used to change the path of a second light beam passing through the short-focus lens and direct it towards the image sensor.

[0008] As can be seen from the above solution, the advantages of the present invention are as follows:

[0009] By installing a first optical path changing element and a second optical path changing element adapted to switch between a first position and a second position inside the housing, without sacrificing optical performance, the structural volume of the lens module is reduced to achieve multi-focal length imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a comparison diagram of the imaging effects of a telephoto lens and a short-focus lens in the prior art;

[0011] Figure 2A is a top view of a lens module according to some embodiments;

[0012] Figure 2B is a side view of a lens module according to some embodiments;

[0013] Figure 3A is a top perspective view of a lens module according to some embodiments;

[0014] Figure 3B is a side perspective view of a lens module according to some embodiments;

[0015] Figure 4 is an exploded view of a lens module according to some embodiments;

[0016] Figures 5A to 5B is a schematic diagram of the operating state of a lens module according to the first embodiment;

[0017] Figures 6A to 6B is a schematic diagram of the operating state of a lens module according to the second embodiment;

[0018] Figures 7A to 7B is a schematic diagram of the operating state of a lens module according to the third embodiment;

[0019] Figure 7C is a top view of a lens module according to the third embodiment;

[0020] Figure 7D is a side view of a lens module according to the third embodiment;

[0021] Wherein, reference numerals:

[0022] 10: Lens module;

[0023] 11: Housing;

[0024] 110: Upper cover;

[0025] 111: Lower cover;

[0026] 112, 113: Light-shielding hood;

[0027] 1131, 1132: Stop plate;

[0028] 114, 115: Light-transmitting hole;

[0029] 116: Chamber;

[0030] 117: Gap;

[0031] 12: Image sensor;

[0032] 13: Telephoto lens;

[0033] 14: First optical path changing element;

[0034] 141: Light incident surface;

[0035] 142: Reflective surface;

[0036] 15: Wide-angle lens;

[0037] 16: Second optical path changing element;

[0038] 161: Pivot;

[0039] 17: Rotation driver;

[0040] 18: Focusing lens;

[0041] 19: Flexible printed circuit;

[0042] 20: Filter holder;

[0043] C1, C2: Center point;

[0044] D1: Distance;

[0045] F1, F2: Focal length;

[0046] 90, 91: Lens;

[0047] L1: First light beam;

[0048] L2: Second light beam;

[0049] X, Y, Z: Axial directions. Detailed implementation manners

[0050] The term "comprising" used in the present invention is an open - ended term and should be interpreted as "comprising but not limited to"; the term "disposed on" means that two or more elements are in direct physical contact with each other or in indirect physical contact with each other. Therefore, when an element is said to be "disposed on" another element, it can be directly on the other element or may include elements existing between the two. When an element is considered to be "connected" to another element, it can be directly connected to the other element or may include elements existing between the two at the same time.

[0051] It should be noted that the terms "a", "another", "first" and "second" used in the present invention are used to distinguish the elements referred to. Except as specifically stated, they are not used to rank or limit the differences of the elements referred to, and they do not limit the scope of this case either. The terms "vertical", "horizontal", "left", "right", "up", "down", "inside", "outside", "front", "rear" and similar expressions used in the present invention are only used to represent the relative positional relationship between elements, and do not limit that the elements using the said terms can only be implemented according to the represented manner.

[0052] Figure 2A is a top view of a lens module according to some embodiments; Figure 2B is a side view of a lens module according to some embodiments; Figure 3A is a top perspective view of a lens module according to some embodiments; Figure 3B is a side perspective view of a lens module according to some embodiments. Please refer to Figures 2A to 3B . The lens module 10 includes a housing 11, an image sensor 12, a telephoto lens 13, a first optical path changing element 14, a short - focal - length lens 15, and a second optical path changing element 16. The image sensor 12 is disposed on the side of the housing 11. The telephoto lens 13 and the short - focal - length lens 15 are disposed above the housing 11, and the short - focal - length lens 15 is between the image sensor 12 and the telephoto lens 13. The first optical path changing element 14 and the second optical path changing element 16 are disposed inside the housing 11.

[0053] As Figure 2A and Figure 2B shown, the image sensor 12 is located on the side of the housing 11 (disposed inside the filter holder 20), and the sensing area of the image sensor 12 (not shown in the figure) faces the positive axis direction of the axial direction X (i.e.,Figure 2A directly above). The side of the housing 11 is not limited to the inner or outer side of the side wall of the housing 11. For example, the side wall of the housing 11 may have a photosensitive hole, and the sensing area of the image sensor 12 corresponds to the photosensitive hole and is attached to the outer side of the side wall of the housing 11. Alternatively, the image sensor 12 may be directly attached to the inner side of the side wall of the housing 11. The image sensor 12 may be, but is not limited to, a Charge-Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor Active Pixel Sensor (CMOS Activepixel sensor). The projection coordinates of the telephoto lens 13, the short-focus lens 15, and the image sensor 12 on the axial direction X are arranged in sequence, so the short-focus lens 15 is located between the image sensor 12 and the telephoto lens 13. The telephoto lens 13, the short-focus lens 15, and the image sensor 12 are not limited to being arranged on the same axis. In other words, the projection ranges of the three on the axial direction Y may be different. In this embodiment, the telephoto lens 13 and the short-focus lens 15 adopt lenses with different focal lengths. In some embodiments, the telephoto lens 13 and the short-focus lens 15 may also adopt lens groups and are respectively applicable to different focal length ranges. The material of the lens may be, but is not limited to, quartz, Polymethyl Methacrylate (PMMA), Polystyrene (PS), Polycarbonate (PC).

[0054] Figure 4 is an exploded view of a lens module according to some embodiments. Please refer to Figure 4 . In this embodiment, the housing 11 includes an upper cover 110 and a lower cover 111. The telephoto lens 13 and the short-focus lens 15 are located above the housing 11. The above of the housing 11 is not limited to the inner or outer side of the top wall of the housing 11. For example, it is disposed on the outer surface of the upper cover 110 (refer to Figure 3B ). The upper cover 110 of the housing 11 in this embodiment includes a light-transmitting hole 114 and a light-transmitting hole 115, which respectively correspond to the telephoto lens 13 and the short-focus lens 15. The light-transmitting hole 114 or the light-transmitting hole 115 allows light to enter the interior of the housing 11 through the telephoto lens 13 or the short-focus lens 15. There is a distance D1 between the center point C1 of the light-transmitting hole 114 and the center point C2 of the light-transmitting hole 115. In some embodiments, the distance D1 is substantially equal to the focal length difference between the telephoto lens 13 and the short-focus lens 15, so that the telephoto lens 13 and the short-focus lens 15 can be focused on the same focal plane, which will be described in detail later.

[0055] The lower cover 111 of the housing 11 in this embodiment presents a cabinet shape and includes three chambers 116. Each chamber 116 is separated by a partition, and the partition has holes to allow light to pass through. The first optical path changing element 14 and the second optical path changing element 16 are located within the housing 11 and are respectively disposed within different chambers 116 of the lower cover 111. As Figure 4 shown, the first optical path changing element 14 is disposed within the uppermost chamber 116 of the lower cover 111, and the second optical path changing element 16 is disposed within the middle chamber 116 of the lower cover 111. The cabinet-shaped lower cover 111 allows the first optical path changing element 14 and the second optical path changing element 16 to be fixed, preventing the elements from shaking. In some other embodiments, the lower cover 111 may not have partitions. In other words, the lower cover 111 may only have a single chamber 116, and the first optical path changing element 14 and the second optical path changing element 16 are arranged relatively within the single chamber 116.

[0056] In this embodiment, the housing 11 includes an upper cover 110, a lower cover 111, a light shield 112, and a light shield 113. The light shield 112 and the light shield 113 are respectively used to accommodate the first optical path changing element 14 and the second optical path changing element 16. As Figure 4 shown, the first optical path changing element 14 presents a triangular prism shape. The light shield 112 has two side plates and an intermediate plate disposed between the two side plates and along the diagonal of the side plates. The two side plates of the light shield 112 shield the left and right sides of the triangular prism to prevent stray light within the housing 11 from entering the first optical path changing element 14; the inclined surface of the triangular prism adheres to the intermediate plate of the light shield 112. In some embodiments, the first optical path changing element 14 is adhered to the intermediate plate of the light shield 112 using optical glue. In some embodiments, the surface of the intermediate plate in contact with the first optical path changing element 14 is coated or plated with a reflective film to increase the intensity of the reflected light passing through the first optical path changing element 14. The second optical path changing element 16 presents a plate shape. The light shield 113 has two side plates and a top plate located at the top side of the two side plates. The top plate has holes to allow light to pass through. The second optical path changing element 16 can be disposed between the two side plates of the light shield 113, enabling light to only be directed towards the second optical path changing element 16 through the holes in the top plate. In this embodiment, the light shield 112 and the light shield 113 are respectively placed in different chambers 116 of the lower cover 111 and fixed to the inner wall of the chamber 116, preventing the first optical path changing element 14 and the second optical path changing element 16 from shaking.

[0057] Figures 5A to 5B is a schematic diagram of the operating state of the lens module according to the first embodiment. Please refer to Figure 4 and Figure 5A。In this embodiment, the first light beam L1 passes through the telephoto lens 13 along the axial direction Y and enters the housing 11, and then enters the first optical path changing element 14. The first optical path changing element 14 changes the path of the first light beam L1 so that the first light beam L1 is directed towards the image sensor 12 along the axial direction X. In this embodiment, as Figure 4 shown, the first optical path changing element 14 is a prism, which has a light incident surface 141 and a reflection surface 142. The telephoto lens 13 is disposed on the light incident surface 141 of the prism. In some embodiments, an optical adhesive is coated between the telephoto lens 13 and the light incident surface 141 of the prism to fix the telephoto lens 13 and prevent the first light beam L1 from being reflected or refracted at the interface between the telephoto lens 13 and the prism. The reflection surface 142 of the prism is used to change the path of the first light beam L1. In some embodiments, the reflection surface 142 is coated or plated with a reflective film to increase the intensity of the first light beam L1 passing through the first optical path changing element 14. In other embodiments, the first optical path changing element 14 is a mirror, which is disposed on the intermediate plate of the light shielding cover 112 (or, in an embodiment without the light shielding cover 112, the mirror is disposed at a position equivalent to the intermediate plate and fixed to the inner wall of the chamber 116).

[0058] Please refer to Figure 5B again. In this embodiment, the second light beam L2 passes through the wide-angle lens 15 along the axial direction Y and enters the housing 11, and then is directed towards the second optical path changing element 16. The second optical path changing element 16 changes the path of the second light beam L2 so that the second light beam L2 is directed towards the image sensor 12 along the axial direction X. In this embodiment, the second optical path changing element 16 is a mirror, and the reflection surface of the mirror is used to change the path of the second light beam L2. Figure 5A The second optical path changing element 16 of the lens module 10 in Figure 5B is in the first position. The second optical path changing element 16 in this embodiment covers the lower part of the housing 11, so that the first light beam L1 can pass through the chamber 116 where the second optical path changing element 16 is located and is directed towards the image sensor 12. Figure 5B The second optical path changing element 16 of the lens module 10 in Figure 5A is in the second position. The second optical path changing element 16 in this embodiment is located on the diagonal plane of the chamber 116 to change the path of the second light beam L2 and direct it towards the image sensor 12. In this embodiment, Figure 5B the second optical path changing element 16 not only changes the path of the second light beam L2, but also is used to block the first light beam L1 from being directed towards the image sensor 12. Therefore,

[0059] Refer to together Figure 4 、 Figure 5A and Figure 5B In this embodiment, one side of the second optical path changing element 16 has a pivot 161, and the pivot 161 is pivotally connected to the side plate of the light shielding cover 113 of the housing 11 (alternatively, pivotally connected to the inner wall of the chamber 116 of the housing 11). As Figure 5A and Figure 5B shown, the pivot 161 extends along the axial direction Z and is pivotally connected to the lower left corner of the side plate of the light shielding cover 113. When the second optical path changing element 16 rotates clockwise along the pivot 161, it can cover the inner side of the lower wall surface of the lower cover 111 (the first position); when the second optical path changing element 16 rotates counterclockwise along the pivot 161, it can span the diagonal plane of the chamber 116 (the second position, for example, at a 45-degree angle with the lower wall surface of the lower cover 111). In this embodiment, the light shielding cover 113 includes a stop plate 1131 and a stop plate 1132, and the stop plates 1131, 1132 are located on the diagonal plane of the light shielding cover 113. When the second optical path changing element 16 is in the second position, it abuts against the stop plate 1131 and the stop plate 1132 to prevent the second optical path changing element 16 from shaking. In this embodiment, the optical path difference between the first light beam L1 and the second light beam L2 is equivalent to the distance D1, and the focal length difference between the telephoto lens 13 and the short-focus lens 15 is equivalent to the distance D1. Therefore, both the first light beam L1 and the second light beam L2 can be focused on the image sensor 12. Based on this, the light transmission hole 114 of the upper cover 110 is used to set the telephoto lens 13, the light transmission hole 115 is used to set the short-focus lens 15, and the distance between the center point C1 of the light transmission hole 114 and the center point C2 of the light transmission hole 115 is set to the distance D1.

[0060] Figures 6A to 6B is a schematic diagram of the operating state of the lens module according to the second embodiment. Please refer to together Figure 6A and Figure 6B . Figure 6A In the lens module 10, the second optical path changing element 16 is in the first position. In this embodiment, the second optical path changing element 16 covers the upper part of the housing 11 and shields the short-focus lens 15, so that the first light beam L1 can pass through the chamber 116 where the second optical path changing element 16 is located and is projected onto the image sensor 12. In this embodiment, the second light beam L2 is shielded by the second optical path changing element 16 and cannot enter the chamber 116 of the lower cover 111. Figure 6B In the lens module 10, the second optical path changing element 16 is in the second position. In this embodiment, the second optical path changing element 16 is located on the diagonal plane of the chamber 116 to change the path of the second light beam L2 and project it onto the image sensor 12. As Figure 6A and Figure 6BAs shown, the pivot 161 extends along the axial direction Z and is pivotally connected to the upper right corner of the side plate of the light shield 113. When the second optical path changing element 16 rotates clockwise along the pivot 161, it can cover the inner side of the top plate of the light shield 113 (the first position); when the second optical path changing element 16 rotates counterclockwise along the pivot 161, it can span the diagonal plane of the chamber 116 (the second position, for example, at a 45-degree angle with the top plate of the light shield 113).

[0061] In some embodiments, the lens module 10 includes a housing 11, an image sensor 12, a telephoto lens 13, a first optical path changing element 14, a short focal length lens 15, a second optical path changing element 16, and a rotation driver 17. Please refer to Figure 3A , in this embodiment, the rotation driver 17 is disposed inside the housing 11 and is between the inner wall of the lower cover 111 of the housing 11 and the light shield 113. The rotation driver 17 includes an actuator and a rotating shaft. The actuator can be, but is not limited to, a stepper motor, a DC motor, a voice coil motor (VCM), or a shape memory alloy (SMA). The rotating shaft is coupled to the actuator and serves as the pivot 161 of the second optical path changing element 16. Based on this, the rotation driver 17 drives the second optical path changing element 16 to rotate clockwise or counterclockwise along the pivot 161. In this embodiment, one end of the rotating shaft is coupled to the actuator, and the other end is coupled to the side plate of the light shield 113. In another embodiment, the other end of the rotating shaft is coupled to the inner wall of the cavity of the lower cover 111.

[0062] Figures 7A to 7B is a schematic diagram of the operating state of the lens module according to the third embodiment. Please refer to it together with Figure 7A and Figure 7B . Figure 7A In the lens module 10 of Figure 7B , the second optical path changing element 16 is in the first position. A part of the second optical path changing element 16 in this embodiment slides out of the cavity 116 of the lower cover 111, so that the first light beam L1 can pass through the cavity 116 where the second optical path changing element 16 is located and is projected onto the image sensor 12. Figure 7C In the lens module 10 of Figure 7D , the second optical path changing element 16 is in the second position. In this embodiment, the second optical path changing element 16 slides into the cavity 116 of the lower cover 111 and is located on the diagonal plane of the cavity 116 to change the path of the second light beam L2 and project it onto the image sensor 12. Figure 7C is a bottom view of the lens module according to the third embodiment; Figure 7D is a side view of the lens module according to the third embodiment. Please refer to it together with Figure 7DAs shown, when the second optical path changing element 16 is in the first position, it passes through the bottom surface of the lower cover 111.

[0063] In some embodiments, the lens module 10 includes a housing 11, an image sensor 12, a telephoto lens 13, a first optical path changing element 14, a short - focus lens 15, a second optical path changing element 16, and a sliding driver (not shown in the figure). The sliding driver is used to drive the second optical path changing element 16 to slide into or out of the cavity of the lower cover 111 through the gap 117. For example, the side of the mirror of the second optical path changing element 16 has a rack, and the sliding driver includes an actuator and a gear coupled to the actuator, and the gear engages with the rack of the mirror. Based on this, the sliding driver drives the second optical path changing element 16 to translate along the diagonal plane of the chamber 116. In this embodiment, the light shield 113 includes a stop plate 1131 and a stop plate 1132, and the stop plates 1131, 1132 are located on the diagonal plane of the light shield 113. When the second optical path changing element 16 slides between the first position and the second position, the stop plate 1131 and the stop plate 1132 serve as the guide rails of the second optical path changing element 16 to guide the sliding direction of the second optical path changing element 16. In some embodiments, the outer side of the bottom surface of the lower cover 111 includes a receiving cavity (not shown in the figure), and the receiving cavity covers the gap 117, so that the second optical path changing element 16 passing through the lower cover 111 can enter the receiving cavity to avoid colliding with the components around the lens module 10.

[0064] Refer back to Figure 3A 、 Figure 3B and Figure 4, in some embodiments, the lens module 10 includes a housing 11, an image sensor 12, a telephoto lens 13, a first optical path changing element 14, a short - focus lens 15, a second optical path changing element 16, and a focusing lens 18. In this embodiment, the focusing lens 18 is between the second optical path changing element 16 and the image sensor 12 and is disposed within the chamber 116 at the lowermost part of the lower cover 111. In other embodiments, the lower cover 111 also does not have a partition, so the first optical path changing element 14, the second optical path changing element 16, and the focusing lens 18 are arranged in sequence from top to bottom within a single chamber 116. The first light beam L1 and the second light beam L2 pass through the focusing lens 18, and the focusing lens 18 is used to adjust the focal length of the lens module 10 to accommodate objects at different distances. Specifically, the lens module 10 can quickly switch between the telephoto mode and the short - focus mode by using the second optical path changing element 16, and the focal length ranges covered by the telephoto mode and the short - focus mode are different. However, in some embodiments, the telephoto mode and the short - focus mode may also cover some of the same focal length ranges. Within each focal length range, the lens module 10 can further use the focusing lens 18 to finely adjust the focal length so that the first light beam L1 (or the second light beam L2) from a specific object is focused on the image sensor 12. In some embodiments, the focusing lens 18 may include a lens and an actuator motor, and the actuator motor is used to drive the lens to move (refer to Figure 3A , move along the axial direction X). The actuator motor can be, but is not limited to, a stepper motor, a DC motor, a voice coil motor, or a shape memory alloy.

[0065] Refer back to Figure 4 , in some embodiments, the image sensor 12 is disposed within the filter holder 20 and is electrically connected to the flexible cable 19. The filter holder 20 is used to mount the filter and protect the image sensor 12. The pass - band spectral range of the filter covers the sensing spectral range of the image sensor 12 to filter out stray light outside the sensing wavelength range. The lens module 10 can be electrically connected to an external electronic device through the flexible cable 19, and the flexible cable 19 can be used to transmit the sensing signal of the image sensor 12 to the electronic device. In some embodiments, the rotation driver 17 (sliding driver) or the focusing lens 18 is electrically connected to the flexible cable 19, and the flexible cable 19 can be used to transmit the control signal of the electronic device to the rotation driver 17 (sliding driver) or the focusing lens 18 to adjust the focusing mode of the lens module 10. The electronic device can be, but is not limited to, a camera, a mobile phone, or a tablet computer, and the lens module 10 can be, but is not limited to, used as the main camera or the front camera of the electronic device.

[0066] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the relevant technical field can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to that defined by the appended patent application scope.

Claims

1. A lens module, characterized in that: Include: a housing; An image sensor, disposed on the side of the housing; A telephoto lens, disposed above the housing; a first optical path changing element, disposed in the housing, for changing the path of a first light beam passing through the telephoto lens toward the image sensor; a short-focus lens, disposed above the housing and between the image sensor and the long-focus lens; as well as A second optical path changing element is disposed within the housing and is suitable for switching between a first position and a second position. The second optical path changing element located at the first position allows the first light beam to be directed toward the image sensor. The second optical path changing element located at the second position is used to change the path of a second light beam passing through the short-focus lens and direct it toward the image sensor.

2. The lens module according to claim 1, characterized in that: The second optical path changing element is a reflector, one side of which is pivotally connected to the housing via a pivot, and the reflector located at the first position covers the bottom of the housing.

3. The lens module according to claim 1, characterized in that: The second optical path changing element is a reflector, one side of which is pivotally connected to the housing via a pivot, and the reflector located at the first position covers the short-focus lens.

4. The lens module according to claim 2 or 3, characterized in that: It further comprises a rotation driver, wherein the pivot is a rotating shaft of the rotation driver.

5. The lens module according to claim 1, characterized in that: The second optical path changing element is a reflector. The housing has a slit. The reflector is used to pass through the slit to switch between the first position and the second position.

6. The lens module according to claim 1, characterized in that: The second light path changing element located at the second position is used to block the first light beam from irradiating the image sensor.

7. The lens module according to claim 6, characterized in that: The second light path changing element is a reflector, the front side of the reflector is a reflective layer for changing the path of the second light beam, and the back side of the reflector is a light absorbing layer for absorbing the first light beam.

8. The lens module according to claim 1, wherein: It further comprises a focusing lens, which is disposed inside the housing and between the second light path changing element and the image sensor.

9. The lens module according to claim 1, wherein: The first light path changing element is a prism having a light incident surface and a reflection surface. The telephoto lens is disposed on the light incident surface, and the reflection surface is used to change the path of the first light beam.

10. The lens module according to claim 1, wherein: The distance between the center point of the telephoto lens and the center point of the short-focus lens is equal to the focal length difference between the telephoto lens and the short-focus lens.

Images