CN112241061A

CN112241061A - Lens device

Info

Publication number: CN112241061A
Application number: CN201910780316.XA
Authority: CN
Inventors: 张锡龄; 施铭伟; 林国泉
Original assignee: Sintai Optical Shenzhen Co Ltd; Asia Optical Co Inc
Current assignee: Sintai Optical Shenzhen Co Ltd; Asia Optical Co Inc
Priority date: 2019-07-19
Filing date: 2019-08-22
Publication date: 2021-01-19
Also published as: TWI704374B; TW202104968A

Abstract

A lens device sequentially comprises a lens driving module, a first reflection assembly and a sensing assembly arranged on an imaging surface from an object end to an image end. The lens driving module includes a first lens unit including a plurality of lenses, one of the lenses having a maximum effective aperture CAB and another of the lenses having a minimum effective aperture CAS. Wherein, the first reflection assembly is located between the lens driving module and the sensing assembly, and the lens device satisfies the following conditions: 0.7< (Pz/Ivz) <1.2, wherein Pz is the distance from the image side surface closest to the image end lens to the reflecting surface of the first reflecting component along the optical axis, and Ivz is the length of the sensing component parallel to the optical axis direction of the plurality of lenses.

Description

Lens device

Technical Field

The present invention relates to a lens device, and more particularly, to a lens module having two reflective elements.

Background

As shown in fig. 1, the conventional periscopic lens 200 sequentially includes a prism P0, a plurality of lenses and a photosensitive element IP from an object end OBJ to an image end IMA. At least one of the plurality of lenses has the largest effective aperture, and in fig. 1, the lens L1 closest to the image end IMA has the largest effective aperture.

However, resolution of the photosensitive component IP of the periscopic mobile phone lens 200 is continuously improved, so that the size of the photosensitive component IP is continuously increased, and even is larger than the maximum effective aperture of the lens in the periscopic mobile phone lens, so that the thickness of the lens module is too large, which causes a defect that the periscopic mobile phone lens cannot be thinned, and further causes the whole thickness of the mobile phone to start to increase and cannot be further reduced.

Disclosure of Invention

The present invention is directed to a lens device, and provides a lens device, which can use a high resolution photosensitive element and does not increase the thickness of the lens device, so as to achieve a thin and high resolution lens device.

The present invention provides a lens device, which comprises a lens driving module, a first reflecting assembly and a sensing assembly disposed on an image plane in sequence from an object side to an image side. The lens driving module includes a first lens unit including a plurality of lenses, one of the lenses having a maximum effective aperture CAB and another of the lenses having a minimum effective aperture CAS. Wherein, the first reflection assembly is located between the lens driving module and the sensing assembly, and the lens device satisfies the following conditions: 0.7< (Pz/Ivz) <1.2, wherein Pz is the distance from the image side surface closest to the image end lens to the reflecting surface of the first reflecting component along the optical axis, and Ivz is the length of the sensing component parallel to the optical axis direction of the plurality of lenses.

In another embodiment, the lens device further includes a second reflective element disposed between the object end and the lens driving module.

In another embodiment, the lens device further satisfies the following condition: CAS/2< Py < CAB, where Py is the perpendicular distance from the reflection point on the optical axis of the first reflective element to the sensing element.

In another embodiment, the lens driving module further includes: a lens module holder; a lens module carrier which is used for fixing and bearing the first lens unit, is arranged on the lens module fixing seat and can move relative to the lens module fixing seat along a Z direction, and the Z direction is a direction parallel to the optical axes of the plurality of lenses;

the lens device further includes: an optical stabilization module comprising: a second lens unit; an optically stable holder; and an optical stabilizing module carrier for fixing the second lens unit, which is arranged on the optical stabilizing fixing seat and can move relative to the optical stabilizing fixing seat along an X direction and a Y direction, wherein the Z direction, the X direction and the Y direction are perpendicular to each other.

In another embodiment, the lens apparatus further includes a housing, the lens driving module and the second reflection assembly being fixed within the housing; the shell comprises a bottom plate and a top plate which are oppositely arranged, and the length of the bottom plate along the Z direction is smaller than that of the top plate; the bottom of the shell is provided with an assembling gap, and the top plate of the shell is provided with a light inlet opposite to the assembling gap.

In another embodiment, the lens driving module is configured to drive the plurality of lenses to move in a Y direction perpendicular to an optical axis direction, wherein the Y direction is a direction perpendicular to a receiving surface plane of the sensing device, a Z direction is a direction parallel to the optical axis of the plurality of lenses, an X direction is perpendicular to the Y direction and the Z direction, and the X direction, the Y direction and the Z direction are perpendicular to each other; the first reflective element is a prism or a mirror and the second reflective element is a prism or a mirror.

In another embodiment, the lens device further includes a second reflective element driving module for driving the second reflective element to rotate around the X-direction or the Y-direction.

In another embodiment, the lens device further includes a first reflective element driving module for driving the first reflective element to move along a direction perpendicular to the plane of the sensing element.

In another embodiment, the lens device further includes a first reflective element driving module for driving the first reflective element to move along a direction parallel to the optical axes of the plurality of lenses.

In another embodiment, the lens driving module further comprises a lens driver for driving the plurality of lenses, the second reflection assembly driving module further comprises a prism driver for driving the second reflection assembly, the lens driver is a magnet coil set, and the magnet and the coil are oppositely arranged.

The lens device has the following beneficial effects: the high-resolution photosensitive assembly can be used, and the thickness of the lens device cannot be increased, so that the thin and high-resolution lens device is achieved.

Drawings

Fig. 1 is a schematic structural diagram of a lens of a periscopic mobile phone.

Fig. 2A is a schematic structural diagram of a periscopic lens module according to the present invention.

Fig. 2B is another schematic structural diagram of the periscopic lens module according to the present invention.

Fig. 2C is a schematic structural diagram of a periscopic lens module according to another embodiment of the present invention.

Fig. 2D is another schematic structural diagram of the periscopic lens module according to the present invention.

Fig. 2E is a schematic diagram of another angle of the periscopic lens in fig. 2D.

Fig. 3A is an optical structure diagram of embodiment 1 of the present invention.

Fig. 3B is an optical structure diagram of embodiment 2 of the present invention.

Fig. 3C is an optical structure diagram of embodiment 3 of the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like, refer to orientations and positional relationships illustrated in the drawings, which are used for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the referenced device or assembly must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting.

As shown in fig. 2A, the present invention relates to a periscopic lens apparatus, which includes a second reflective driving module 1, a lens driving module 2, a first reflective driving module 4, and a sensing module 3 for sensing light. The second reflection assembly driving module 1 includes a second reflection assembly 10 for changing a light beam path of an incident light beam incident along the Y direction and a second reflection assembly carrier (not shown) for carrying the second reflection assembly 10, the lens driving module 2 includes a first lens unit 20 for transmitting the light beam, the first reflection assembly driving module 4 includes a first reflection assembly 40 for changing the light beam path from the first lens unit 20 to the sensing assembly 3, the lens driving module 2 is located between the second reflection assembly driving module 1 and the sensing assembly 3, and the incident light beam sequentially passes through the second reflection assembly driving module 1, the lens driving module 2, the first reflection assembly driving module 4 and the sensing assembly 3.

The second reflection assembly 10 changes the path of the incident light beam to be incident to the lens driving module 2 along the Z direction, and the second reflection assembly driving module 1, the lens driving module 2 and the first reflection assembly driving module 4 are sequentially arranged along the Z direction.

As shown in fig. 2A, a receiving surface 31 of the sensing element 3 for receiving the light and the light emitting surface 21 of the first lens unit 20 for transmitting the light are perpendicular to each other, that is, the light transmitted from the first lens unit 20 is parallel to the receiving surface 31, and the first reflective element 40 is located on one side of the receiving surface 31 of the sensing element 3. Specifically, the light emitting surface 21 of the first lens unit 20 is upright and faces to the right, that is, the light emitting surface 21 faces the first reflective device driving module 4 and the sensing device 3, the sensing device 3 is tiled at the bottom side, the receiving surface 31 of the sensing device 3 faces upward, that is, the receiving surface 31 of the sensing device 3 faces the first reflective device 40, the sensing device 3 and the first reflective device 40 are disposed opposite to each other, and the first reflective device 40 is located above the sensing device 3.

The second reflection assembly 10 is fixedly arranged relative to the second reflection assembly carrier, and the second reflection assembly 10 can not rotate any more at this time, so that the reliability is higher. The first lens unit 20 is movable along the Z-axis by driving of a lens driver to implement an Auto Focus (AF) function. The first reflection assembly 40 can swing around the X-axis and the Y-axis, that is, multi-directional swing is realized, the first reflection assembly 40 is closer to the sensing assembly 3, and an Optical Image Stabilization (OIS) function can be realized by adjusting a small angle.

The Y axis, the Z axis and the X axis are perpendicular to each other, the Y axis is used as the Y direction, the Z axis is used as the Z direction, the X axis is used as the X direction, the incident light from the object end of the object to be photographed is incident to the second reflection assembly driving module 1 along the Y direction, the incident light is changed by the second reflection assembly 10 of the second reflection assembly driving module 1 to be incident to the lens driving module 2 along the Z direction, and then the incident light is changed by the first lens unit 20 of the lens driving module 2 to the first reflection assembly driving module 4 along the Z direction, and the light beam is changed by the first reflection assembly 40 of the first reflection assembly driving module 4 to be incident to the sensing assembly 3 along the Y direction.

The second reflection element driving module 1, the lens driving module 2 and the first reflection element driving module 4 are sequentially arranged along the Z direction, and the first reflection element driving module 4 and the sensing element 3 are arranged along the Y direction.

Specifically, the lens driving module 2 includes a lens driver (not shown) for driving the first lens unit 20. The lens driver is a linear voice coil motor, the first lens unit 20 is mounted on a carrier (not shown) of the linear voice coil motor, and the linear voice coil motor has a set of magnet coils (not shown) for driving the first lens unit 20 to move along the Z-axis, and the magnet and the coils are arranged oppositely, in other words, the lens driver drives the first lens unit 20 to move along the Z-direction. The first reflection assembly driving module 4 includes a first reflection assembly driver (not shown) for driving the first reflection assembly 40.

The first reflection element driving module 4 may be configured to rotate or move the first reflection element 40 by a first reflection element driver, for example, to drive the first reflection element 40 to rotate along the X direction and the Y direction as axes, or to drive the first reflection element 40 to move in a translation along an axial direction; the first reflection element driving module 4 can also be used to fix the first reflection element 40 or stabilize it without rotation and movement.

It should be noted that the linear voice coil motor and the swing voice coil motor are both voice coil motors commonly used in the prior art, and detailed description thereof is omitted here. It should be noted that piezoelectric material can be used to replace the voice coil motor as the lens driver or the first reflective element driver.

Fig. 2B is another variation of fig. 2A. As shown in fig. 2B, a receiving surface 31 of the sensing element 3 for receiving the light and the light emitting surface 21 of the first lens unit 20 for transmitting the light are perpendicular to each other, that is, the light transmitted from the first lens unit 20 is parallel to the receiving surface 31, and the first reflective element 40 is located on one side of the receiving surface 31 of the sensing element 3. Specifically, the light emitting surface 21 of the first lens unit 20 is upright and faces to the right, that is, the light emitting surface 21 faces the first reflective device driving module 4 and the sensing device 3, the sensing device 3 is tiled on the top side, the receiving surface 31 of the sensing device 3 faces downward, that is, the receiving surface 31 of the sensing device 3 faces the first reflective device 40, the sensing device 3 and the first reflective device 40 are disposed opposite to each other, and the first reflective device 40 is located below the sensing device 3.

Fig. 2C is a schematic structural diagram of a periscopic lens module according to another embodiment of the present invention. The lens device includes a second reflective driving module 1, a lens driving module 2, an optical stabilizing module 5, a first reflective driving module 4 and a sensing module 3, which are sequentially arranged along a Z direction, wherein the first reflective driving module 4 and the sensing module 3 are assembled together and shown as a whole. Wherein the lens driving module 2 has an optical axis along the Z-direction. The second reflective driving module 1, the lens driving module 2, the optical stabilizing module 5, the first reflective driving module 4 and the sensing module 3 may be the same as or similar to those in fig. 2A or 2B, and are not repeated herein.

Wherein the second reflective drive assembly module 1 comprises: a second reflection unit 1a, a second reflection unit carrier 1b fixing and carrying the second reflection unit 1a, and a second reflection unit fixing member 1 c. In an alternative embodiment, the second reflecting unit carrier 1b may be fixed in the second reflecting unit fixing member 1 c; in an alternative embodiment, the second reflection unit carrier 1b is disposed in the second reflection unit holder 1c through a rotation shaft extending along the X direction, and the second reflection driving assembly module 1 further includes a second reflection unit driving device (not shown), which may be, for example, an electromagnetic device, and drives the second reflection unit carrier 1b to rotate around its rotation shaft by the action of electromagnetic force when necessary.

The second reflective driving module 1 is used for reflecting light incident from the Y direction to the Z direction and sequentially entering the lens driving module 2, the optical stabilizing module 5, the first reflective driving module 4 and the sensing module 3, wherein the Y direction is perpendicular to the Z direction and the X direction. In the case where the second reflection unit carrier 1b can rotate around its rotation axis, the direction in which light is reflected to the lens driving module 2 can be adjusted.

The lens driving module 2 includes: a first lens unit 2a, a lens driving module carrier 2b fixing and carrying the first lens unit 2a, and a lens driving module holder 2 c. The lens driving module carrier 2b is disposed on the lens driving module holder 2c and can move along the Z direction relative to the lens driving module holder 2c to focus and form a clear image on the sensing assembly 3. The lens driving module carrier 2b is disposed on the lens driving module holder 2c in various ways, for example, a guide bar extending along the Z direction is disposed on the lens driving module holder 2c, and corresponding holes are disposed on the lens driving module carrier 2b and penetrate through the guide bar via the holes, a first lens unit driving device is disposed in the lens driving module 2, and the first lens unit driving device may be, for example, an electromagnetic device, and drives the lens driving module carrier 2b to slide along the guide bar on the lens driving module holder 2c under the action of electromagnetic force when necessary.

The optical stabilization module 5 includes: a second lens unit 5a, an optical stabilization module carrier (not shown) for fixing the second lens unit 5a, and an optical stabilization holder 5 b. The second lens unit 5a also has an optical axis extending in the Z direction without optical stabilization compensation. Wherein the optical stabilizing module carrier is arranged on the optical stabilizing mount 5b and is movable relative to the optical stabilizing mount 5b in the X-direction and the Y-direction. In one embodiment of the present invention, on the optical stabilizing mount 5b, a guide bar extending along the X direction is provided, and on the optical stabilizing module carrier, a through hole extending along the X direction is provided, the through hole being a long hole whose length along the Y direction is greater than the diameter of the guide bar of the optical stabilizing mount. The optical stabilizing module carrier is in sliding fit with the guide rod of the optical stabilizing fixing seat 5b through the through hole of the optical stabilizing module carrier. The optical stabilizing module 5 further comprises a first optical stabilizing drive and a second optical stabilizing drive, both of which comprise, in one embodiment of the invention, a magnet disposed on one of the optical stabilizing module carrier and the optical stabilizing mount 5b and a coil disposed opposite the other of the optical stabilizing module carrier and the optical stabilizing mount 5 b. The first and second optical stabilization driving devices are used for driving the optical stabilization module carrier to move in the X-direction and the Y-direction, respectively, relative to the optical stabilization fixture 5b, thereby compensating for image blur that may be caused by vibration.

The lens device further includes a controller electrically connected to the second reflection unit driving device, the lens unit driving device, the first optical stabilization driving device, the second optical stabilization driving device, and the sensor described above to control the operations of these driving devices, and more specifically, the controller controls the operations of the first optical stabilization driving device and the second optical stabilization driving device according to a vibration signal fed back from the sensor. Since the technology of the controller receiving the signal of the sensor and controlling the operation of the driving device is the prior art, it is not described herein.

During assembly, the second reflective unit fixing member 1c of the second reflective driving assembly module 1, the lens driving module fixing base 2c of the lens driving module 2, the optical stabilizing fixing base 5b of the optical stabilizing module 5, the first reflective assembly driving module 4, and the sensing assembly 3 are sequentially fixed together, for example, by an adhesive.

Because this embodiment has set up optics stabilizing module 5 alone, and this optics stabilizing module 5 compensates the vibration alone, compare the lens device in the prior art and adopt lens drive module to accomplish simultaneously and focus and prevent the hand shake function or the second reflection drive subassembly module prevents the hand shake function, can improve the dependability and the controllability of optics stability.

Fig. 2D is another schematic structural diagram of the periscopic lens module according to the present invention. Fig. 2E is a schematic diagram of another angle of the periscopic lens in fig. 2D. The second reflective driving module 1, the lens driving module 2, the optical stabilization module, the first reflective driving module, and the sensing module of the periscopic lens may be the same as or similar to those shown in fig. 2A or 2B, and are not described herein again. As shown in fig. 2D and 2E, the second reflection driving assembly module 1 includes only the second reflection unit 1a, and the second reflection unit carrier 1b fixing and carrying the second reflection unit 1 a.

The lens device further includes a housing 6, and the housing 6 has a cubic shape and includes a bottom plate 6a and a top plate 6b disposed opposite to each other, and front and rear side plates 6c, left and right side plates 6d connected between the bottom plate 6a and the top plate 6b, wherein the front and rear side plates 6c are parallel to the Z direction, and the left and right side plates 6d are perpendicular to the Z direction. Openings 6e for light to pass through are formed in the left and right side plates 6d, and the length of the bottom plate 6a in the Z direction is smaller than that of the top plate 6b, so that an insertion notch 6f for the second reflective driving assembly module 1 to be inserted is formed in the bottom of the housing 6. A light inlet 6g opposite to the assembly notch 6f is arranged on the top plate 6b of the housing 6, and light rays incident from the Y direction enter the light inlet 6g, are reflected to the Z direction by the second reflection driving component module 1 and enter the lens driving module 2, the optical stabilization module and the sensing component in sequence.

The second reflective drive assembly module 1 and the lens drive module 2 are both fixedly disposed within the housing 6, which may be secured by, for example, an adhesive. When assembling, the second reflection driving component module 1 is assembled from the assembly notch 6f at the bottom of the shell 6. After the second reflection driving component module 1 and the lens driving module 2 are adjusted to be aligned with the core, the second reflection driving component module and the lens driving module are fixed in a mode of curing the adhesive. A plurality of dispensing holes 6h may be formed in the front and rear side plates 6c of the housing 6 corresponding to the second reflective driving device module 1, and the dispensing holes 6h may be opposite to the second reflective driving device module 1. And dispensing is carried out through the dispensing hole 6h, so that the second reflection driving assembly module 1 can be further fixed.

In this embodiment, the second reflective drive component module 1 and the lens drive module 2 may be fixed within the same housing 6, thereby improving the reliability of the lens apparatus. The first reflective assembly drive modules may be fixed together within the same housing 6 or outside the housing 6.

The following is a detailed description of specific examples.

Example 1

FIG. 3A is an embodiment of example 1 of the present invention. As shown in fig. 3A, the lens device of the present invention sequentially includes a second reflective element 10, a lens driving module 2, a first reflective element 41, and a sensing element 3 disposed on an image plane from an object end OBJ to an image end IMA. The second reflection element 10 is installed in the second reflection element driving module 1, and the first reflection element 41 is installed in the first reflection element driving module 4. The light ray OAB enters the second reflection element 10 from the object end OBJ along the optical axis, and enters the lens driving module 2 along the optical axis after being reflected by the second reflection element 10. Then, the light ray OAB enters the first reflection element 41 along the optical axis, and is reflected by the first reflection element 41 to irradiate on the sensing element 3.

The lens driving module 2 further includes a plurality of lenses, and sequentially includes from the object end OBJ to the sensing element 3: a first lens element L11 with positive refractive power, the first lens element L11 including a convex surface S11 facing the object side OBJ and a concave surface S12 facing the image side; a negative power lens L12, the lens L12 includes a concave surface S13 facing the object side OBJ and a concave surface S14 facing the image side; a third lens element L13 with positive refractive power, the third lens element L13 including a convex surface S15 facing the object side OBJ and a concave surface S16 facing the image side; a fourth lens element L14 with positive refractive power, the fourth lens element L14 including a convex surface S17 facing the object side OBJ and a convex surface S18 facing the image side; and a negative fifth lens element L15, the fifth lens element L15 includes a concave surface S19 facing the object side OBJ and a concave surface S20 facing the image side. Wherein the lens device of embodiment 1 satisfies the following conditions: 0.7< (Pz/Ivz) <1.2, wherein Pz is the distance from the image side surface closest to the image end lens to the reflection surface of the first reflection assembly along the optical axis, and Ivz is the length of the sensing assembly parallel to the optical axis OAB direction of the plurality of lenses.

The first lens L11 of these lenses has a maximum effective aperture CAB, the third lens L13 of these lenses has a minimum effective aperture CAS; the lens apparatus of embodiment 1 is made to further satisfy the following condition: CAS/2< Py < CAB, where Py is the perpendicular distance from the reflection point on the optical axis of the first reflective element to the sensing element.

Table one is a table of relevant parameters of each lens of the lens device in fig. 3A, and table one shows that the lens device of embodiment 1 has an effective focal length equal to 15.000mm, an aperture value (F #) equal to 2.69, a total lens length equal to 16.627457mm, and a field of view equal to 22 degrees.

Watch 1

The aspherical surface sag z of each lens in table i is given by the following equation:

z＝ch²/{1+[1-(k+1)c²h²]^1/2}+Ah⁴+Bh⁶+Ch⁸+Dh¹⁰+Eh¹²+Fh¹⁴+Gh¹⁶+Hh¹⁸

wherein: c: a curvature; h: the vertical distance from any point on the surface of the lens to the optical axis; k: a cone coefficient; a to H: an aspheric surface coefficient.

The second table is a table of the relevant parameters of the aspheric surface of each lens in the first table, where k is the Conic coefficient (Conic Constant) and A-H are aspheric coefficients.

Watch two

According to table one, CAB is 5.56mm, CAS is 3.053535mm, Pz is 6.5mm, Py is 3.736051mm, Ivz is 5.866 mm. Therefore, the lens device of embodiment 1 does satisfy the condition that Pz/Ivz is 1.10808: 0.7< (Pz/Ivz) < 1.2. Further, since CAS/2 is 1.5267675mm, the lens device of embodiment 1 does satisfy the condition: CAS/2< Py < CAB.

Example 2

FIG. 3B shows another embodiment of example 1 of the present invention. As shown in fig. 3B, the lens device of the present invention sequentially includes a second reflective element 10, a lens driving module 2, a first reflective element 41, and a sensing element 3 disposed on an image plane from an object end OBJ to an image end IMA. The second reflection element 10 is installed in the second reflection element driving module 1, and the first reflection element 41 is installed in the first reflection element driving module 4. The light ray OAB enters the second reflection element 10 from the object end OBJ along the optical axis, and enters the lens driving module 2 along the optical axis after being reflected by the second reflection element 10. Then, the light ray OAB enters the first reflection element 41 along the optical axis, and is reflected by the first reflection element 41 to irradiate on the sensing element 3.

The lens driving module 2 further includes a plurality of lenses, and sequentially includes from the object end OBJ to the sensing element 3: a first lens element L21 with positive refractive power, the first lens element L21 including a convex surface S21 facing the object side OBJ and a concave surface S22 facing the image side; a negative power lens L22, the lens L22 includes a concave surface S23 facing the object side OBJ and a concave surface S24 facing the image side; a third lens element L23 with positive refractive power, the third lens element L23 including a convex surface S25 facing the object side OBJ and a concave surface S26 facing the image side; a fourth lens element L24 with positive refractive power, the fourth lens element L24 including a convex surface S27 facing the object side OBJ and a convex surface S28 facing the image side; and a negative fifth lens element L25, the fifth lens element L25 includes a concave surface S29 facing the object side OBJ and a concave surface S30 facing the image side. Wherein the lens device of embodiment 2 satisfies the following conditions: 0.7< (Pz/Ivz) <1.2, wherein Pz is the distance from the image side surface closest to the image end lens to the reflection surface of the first reflection assembly along the optical axis, and Ivz is the length of the sensing assembly parallel to the optical axis OAB direction of the plurality of lenses.

A first lens L21 of the lenses has a maximum effective aperture CAB, and a second lens L22 of the lenses has a minimum effective aperture CAS; the lens apparatus of embodiment 2 is made to further satisfy the following condition: CAS/2< Py < CAB, where Py is the perpendicular distance from the reflection point on the optical axis of the first reflective element to the sensing element.

Table three is a table of relevant parameters of each lens of the lens device in fig. 3B, and the data in table three shows that the lens device of embodiment 2 has an effective focal length equal to 21.900mm, an aperture value (F #) equal to 3.4, a total lens length equal to 22.66369mm, and a field of view equal to 20.6 degrees.

Watch III

The definition of the aspheric surface sag z of each lens in table three is the same as that of the aspheric surface sag z of each lens in table one in embodiment 1, and is not repeated here.

Table IV is a table of the relevant parameters of the aspherical surface of each lens in Table III, where k is a Conic coefficient (Conic Constant) and A to H are aspherical coefficients.

Watch four

According to table three, CAB is 6.448mm, CAS is 3.709908mm, Pz is 9.1mm, Py is 4.789974mm, Ivz is 7.994294 mm. Therefore, the lens device of embodiment 2 does satisfy the condition that Pz/Ivz is 1.138312: 0.7< (Pz/Ivz) < 1.2. Further, since CAS/2 is 1.854954mm, the lens device of embodiment 2 does satisfy the condition: CAS/2< Py < CAB.

Example 3

FIG. 3C shows an embodiment of example 3 of the present invention. As shown in fig. 3C, the lens device of the present invention sequentially includes a second reflective element 10, a lens driving module 2, a first reflective element 41, and a sensing element 3 disposed on an image plane from an object end OBJ to an image end IMA. The second reflection element 10 is installed in the second reflection element driving module 1, and the first reflection element 41 is installed in the first reflection element driving module 4. The light ray OAB enters the second reflection element 10 from the object end OBJ along the optical axis, and enters the lens driving module 2 along the optical axis after being reflected by the second reflection element 10. Then, the light ray OAB enters the first reflection element 41 along the optical axis, and is reflected by the first reflection element 41 to irradiate on the sensing element 3.

The lens driving module 2 further includes a plurality of lenses, and sequentially includes from the object end OBJ to the sensing element 3: a first lens element L31 with negative refractive power, the first lens element L31 including a convex surface S31 facing the object side OBJ and a concave surface S32 facing the image side; a second lens element L32 with positive refractive power, the second lens element L32 including a concave surface S33 facing the object side OBJ and a convex surface S34 facing the image side; a negative third lens element L33, the third lens element L33 including a concave surface S35 facing the object side OBJ and a convex surface S36 facing the image side; a fourth lens element L34 with positive refractive power, the fourth lens element L34 including a convex surface S37 facing the object side OBJ and a convex surface S38 facing the image side; and a fifth lens element L35 with positive refractive power, the fifth lens element L35 having a convex surface S39 facing the object side OBJ and a concave surface S40 facing the image side. Wherein the lens device of embodiment 3 satisfies the following conditions: 0.7< (Pz/Ivz) <1.2, wherein Pz is the distance from the image side surface closest to the image end lens to the reflection surface of the first reflection assembly along the optical axis, and Ivz is the length of the sensing assembly parallel to the optical axis OAB direction of the plurality of lenses.

The fourth lens L34 of these lenses has a maximum effective aperture CAB, the second lens L32 of these lenses has a minimum effective aperture CAS; the lens apparatus of embodiment 3 is made to further satisfy the following condition: CAS/2< Py < CAB, where Py is the perpendicular distance from the reflection point on the optical axis of the first reflective element to the sensing element.

Table five is a table of relevant parameters of each lens of the lens device in fig. 3C, and the data in table five shows that the effective focal length of the lens device of example 3 is equal to 8.04mm, the aperture value (F #) is equal to 1.45, the total lens length is equal to 50.80mm, and the field of view is equal to 70 degrees.

Watch five

The definition of the aspheric surface sag z of each lens in table five is the same as that of the aspheric surface sag z of each lens in table one in embodiment 1, and is not repeated here.

Table six is a table of relevant parameters of the aspherical surface of each lens in Table five, where k is a Conic coefficient (Conic Constant) and A to H are aspherical coefficients.

Watch six

According to table five, CAB is 16.92893mm, CAS is 7.240997mm, Pz is 8.0mm, Py is 6.9714116mm, Ivz is 10.4 mm. Therefore, Pz/Ivz is 0.76923, and the lens device of embodiment 3 does satisfy the condition: 0.7< (Pz/Ivz) < 1.2. Further, since CAS/2 is 3.6204985mm, the lens device of embodiment 3 does satisfy the condition: CAS/2< Py < CAB.

In the present invention, the three axes of the Y-axis, the Z-axis and the X-axis are perpendicular to each other, the Y-axis is a direction perpendicular to the plane of the receiving surface 31 of the sensing device 3 for receiving light, and the Z-axis is a direction parallel to the optical axis and penetrating through the lens driving module 2.

The second reflection assembly driving module 1 includes a second reflection assembly driver (not shown) for driving the second reflection assembly 10. The first reflection element driving module 4 can also be used to fix the first reflection element 40 or stabilize it without rotation and movement.

In the present invention, the second reflection element driver may be a swinging voice coil motor, the second reflection element 10 is mounted on a carrier (not shown) of the swinging voice coil motor, and the swinging voice coil motor has a set of magnet coil sets (not shown) for driving the second reflection element 10 to rotate along the X-axis or along the Y-axis, the magnet and the coil are arranged oppositely, in other words, the second reflection element driver drives the second reflection element 10 to rotate around the X-axis or the Y-axis.

In the present invention, the lens driver is a linear voice coil motor, the first lens unit 20 is mounted on a carrier (not shown) of the linear voice coil motor, and the linear voice coil motor has a set of magnet coils (not shown) for driving the first lens unit 20 to move along the Z-axis, or along the Z-axis and the Y-axis, or along the Z-axis and the X-axis, or along the Z-axis, the Y-axis and the Z-axis, and the magnets and the coils are arranged opposite to each other. In other words, when the second reflection assembly driver drives the second reflection assembly 10 to rotate along the X-axis, the lens driver drives the first lens unit 20 to move along the X-axis direction and/or the Z-axis direction; when the second reflection assembly driver drives the second reflection assembly 10 to rotate along the Y-axis, the lens driver drives the first lens unit 20 to move along the Y-axis direction and/or the Z-axis direction. In addition, the lens driver can drive the first lens unit 20 to move along the Z-axis, the Y-axis and the Z-axis simultaneously.

In the present invention, when the second reflective element driver drives the second reflective element 10 to rotate along the X-axis and the lens driver drives the first lens unit 20 to move along the X-axis, the first reflective element driver (not shown) is used to move the first reflective element along the Y-axis or the Z-axis for adjusting the focal length of the lens device. In the present invention, when the second reflective element driver drives the second reflective element 10 to rotate along the Y-axis and the lens driver drives the first lens unit 20 to move along the Y-axis, the first reflective element driver (not shown) is used to move the first reflective element along the Y-axis or the Z-axis. In the present invention, when the lens driver can drive the first lens unit 20 to move along the Z-axis direction, the first reflective element driving module 4 is only used to fix or stabilize the first reflective element without any rotation or movement.

It should be noted that the linear voice coil motor and the swing voice coil motor are both voice coil motors commonly used in the prior art, and detailed description thereof is omitted here. It should be noted that piezoelectric material can be used to replace the voice coil motor as the lens driver, the second reflective element driver or the first reflective element driver.

In the present invention, the first reflection element 41 may be a mirror or a prism. The second reflective element 10 may also be a mirror or a prism.

It will be appreciated that modifications and variations are possible to those skilled in the art in light of the above teachings and are within the purview of the appended claims.

Claims

1. A lens device, comprising, in order along an optical axis from an object side to an image side:

a lens driving module including a first lens unit including a plurality of lenses, one of the lenses having a maximum effective aperture CAB and another of the lenses having a minimum effective aperture CAS;

a first reflective component; and

the sensing assembly is arranged on the imaging surface;

wherein, the first reflection assembly is located between the lens driving module and the sensing assembly, and the lens device satisfies the following conditions: 0.7< (Pz/Ivz) <1.2, wherein Pz is the distance from the image side surface closest to the image end lens to the reflecting surface of the first reflecting component along the optical axis, and Ivz is the length of the sensing component parallel to the optical axis direction of the plurality of lenses.

2. The lens device as claimed in claim 1, further comprising a second reflective element disposed between the object end and the lens driving module.

3. The lens device as claimed in claim 2, wherein the lens device further satisfies the following condition:

CAS/2< Py < CAB, where Py is the perpendicular distance from the reflection point on the optical axis of the first reflective element to the sensing element.

4. The lens device as claimed in claim 3, wherein the lens driving module further includes: a lens module holder; a lens module carrier which is used for fixing and bearing the first lens unit, is arranged on the lens module fixing seat and can move relative to the lens module fixing seat along a Z direction, and the Z direction is a direction parallel to the optical axes of the plurality of lenses;

5. The lens device as claimed in claim 4, wherein the lens device further includes a housing, the lens driving module and the second reflecting assembly being fixed in the housing; the shell comprises a bottom plate and a top plate which are oppositely arranged, the length of the bottom plate along the Z direction is smaller than that of the top plate, a group-in notch is formed at the bottom of the shell, and a light inlet opposite to the group-in notch is formed in the top plate of the shell.

6. The lens device as claimed in claim 2, wherein the lens driving module is configured to drive the plurality of lenses to move perpendicularly to a Y direction, wherein the Y direction is a direction perpendicular to a receiving surface plane of the sensing element, a Z direction is a direction parallel to optical axes of the plurality of lenses, an X direction is perpendicular to the Y direction and the Z direction, and the X direction, the Y direction and the Z direction are perpendicular to each other;

the first reflective element is a prism or a mirror and the second reflective element is a prism or a mirror.

7. The lens device as claimed in claim 6, further comprising a second reflective element driving module for driving the second reflective element to rotate around the X-direction or the Y-direction.

8. The lens device as claimed in claim 6, further comprising a first reflective element driving module for driving the first reflective element to move along a direction perpendicular to the plane of the sensing element.

9. The lens device as claimed in claim 6, further comprising a first reflective element driving module for driving the first reflective element to move along a direction parallel to the optical axes of the plurality of lenses.

10. A lens apparatus as claimed in claim 8 or 9, wherein the lens driving module further includes a lens driver for driving the plurality of lenses, the second reflecting element driving module further includes a prism driver for driving the second reflecting element, the lens driver is a magnet coil set, and the magnet and the coil are disposed opposite to each other.