CN213182168U - Lens system and imaging apparatus - Google Patents

Abstract

The utility model relates to an optical equipment technical field discloses a camera lens system and imaging device. The lens system includes a zoom lens assembly. The lens system also comprises an adjusting device, wherein the adjusting device is connected with the lens in the zooming lens assembly so as to adjust the focal length of the zooming lens assembly through the lens and further adjust the focal length of the lens system, and the relative position of the lens in the lens system is fixed. In this way, the utility model discloses can improve the convenience of camera lens system zooming process.

Description

Lens system and imaging apparatus

Technical Field

The utility model relates to an optical equipment technical field especially relates to a lens system and imaging device.

Background

At present, the zooming mode of the lens is usually realized by axially moving the lenses of the zooming group, and such a mode usually adopts a spiral mode, that is, while the lenses of the zooming group are axially moved, the lenses also rotate around the optical axis, the corresponding structure is quite complex, and the manufacturing process of the lens barrel is also quite complex. Therefore, the current zooming method has a complicated zooming process and the corresponding manufacturing process is also quite complicated.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a lens system and an imaging apparatus, which can improve the convenience of the zooming process of the lens system.

In order to solve the technical problem, the utility model discloses a technical scheme be: a lens system is provided. The lens system includes a zoom lens assembly. The lens system also comprises an adjusting device, wherein the adjusting device is connected with the lens in the zooming lens assembly so as to adjust the focal length of the zooming lens assembly through the lens and further adjust the focal length of the lens system, and the relative position of the lens in the lens system is fixed.

In an embodiment of the present invention, the adjusting device includes an adjusting handle, the adjusting handle is connected to the lens in the zoom lens assembly, and the lens connected to the adjusting handle is controlled to turn around a rotation axis, so that the focal length of the zoom lens assembly is switched between the first focal length and the second focal length. The rotating shaft passes through the optical axis of the lens system and is perpendicular to the optical axis, the lens connected with the adjusting handle is provided with a first surface and a second surface which are opposite, and the first surface and the second surface are different in structure.

The utility model discloses an in the embodiment, adjusting device includes the snap ring, and the snap ring card is located the periphery of the lens subassembly that zooms, and the snap ring is connected to the regulation handle.

In an embodiment of the present invention, the curvatures of the corresponding positions of the first surface and the second surface are different; and/or the first surface and the second surface have different surface types.

In an embodiment of the utility model, adjusting device includes the adjusting part, the adjusting part includes first regulating part and second regulating part, first regulating part and second regulating part set gradually along the direction of keeping away from the optical axis of lens system, lens in the first regulating part butt zoom lens subassembly, the lens that first regulating part was butted is the elastomer, the contact surface of first regulating part and second regulating part becomes angle setting with the optical axis of lens system, and the second regulating part can be followed the direction removal that is on a parallel with the optical axis of lens system, make the lens that first regulating part extrudees its butt.

In an embodiment of the present invention, the lens system includes a lens barrel, the adjusting component includes a limiting member fixed to the lens barrel, and the first adjusting member is slidably connected to the limiting member and can move along a direction perpendicular to an optical axis of the lens system.

In an embodiment of the present invention, the adjusting device includes two sets of adjusting components, and the first adjusting components of the two sets of adjusting components are disposed opposite to each other on two sides of the zoom lens component.

In an embodiment of the present invention, the first adjusting member and the second adjusting member are annular, and the lens abutted by the first adjusting member, the first adjusting member and the second adjusting member are nested in sequence.

In an embodiment of the present invention, the length of the lens system in a direction parallel to the optical axis of the lens system is fixed.

In order to solve the above technical problem, the utility model discloses a still another technical scheme be: an image forming apparatus is provided. The imaging apparatus includes an imaging device and a lens system as set forth in the above embodiments, the imaging device being disposed corresponding to the lens system.

The utility model has the advantages that: be different from prior art, the utility model provides a camera lens system and imaging device. The lens system comprises an adjusting device, and the adjusting device adjusts the focal length of the zooming lens assembly through the lens connected with the adjusting device, so that the focal length of the lens system is adjusted, and zooming is realized. Different from the mode that traditional camera lens zoomed through the lens of axial displacement group the utility model discloses the zoom in-process of lens system, the relative position of the lens that adjusting device connects in lens system is fixed, need not to move promptly and can realize zooming, means the utility model discloses the simple structure that the zoom in-process of lens system depended on to it is comparatively convenient to zoom the process, therefore can improve the convenience of lens system zoom in-process.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. Moreover, the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.

Fig. 1 is a schematic structural diagram of an embodiment of a lens system according to the present invention;

FIG. 2 is a schematic view of another state of the lens system shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along the line A-A of the lens system shown in FIG. 1;

fig. 4 is a schematic cross-sectional view of another embodiment of a lens system according to the present invention;

FIG. 5 is a schematic view of another state of the lens system shown in FIG. 4;

fig. 6 is a schematic structural diagram of an embodiment of the imaging apparatus of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

For the comparatively complicated technical problem of the process of zooming of solving camera lens among the prior art, an embodiment of the utility model provides a camera lens system. The lens system includes a zoom lens assembly. The lens system also comprises an adjusting device, wherein the adjusting device is connected with the lens in the zooming lens assembly so as to adjust the focal length of the zooming lens assembly through the lens and further adjust the focal length of the lens system, and the relative position of the lens in the lens system is fixed. As described in detail below.

Currently applied lenses are generally classified into zoom and fixed focus lenses. In the micro-projection field, most of lenses, such as a long-focus lens, a short-focus lens, an ultra-short-focus lens and the like, are basically fixed-focus lenses, namely, the focal length is not changeable, and the size of a picture can only be changed by moving the distance between a projection and a screen. While projectors used in commercial, engineering and other fields are increasingly using zoom lenses, especially in the engineering field, a projector is usually equipped with a plurality of fixed focus and zoom lenses.

The zoom lens is generally a continuous zoom in which sharp focus is obtained at any position between the Tele end and the Wide end of the lens. However, since the design of such a lens needs to be considered for the image quality optimization of each focal point from the Tele end to the Wide end, there are problems of high design difficulty, high cost, and the like. The zoom times of standard lenses of general commercial projectors are mostly about 1.2, and the lens selling prices of the standard lenses more than 1.5 are expensive, and the standard lenses are mainly applied to the engineering field. As such, the zoom lens is rarely present on projectors that are low cost initiatives. However, with the development of micro-projection technology, the market demand for a zoom projector lens becomes more and more obvious, and how to combine low cost with market demand for an imaging device such as a projector is an urgent problem to be solved.

In addition, because the zoom lens needs to optimize the image quality of each focal point from the Tele end to the Wide end, most of the zoom lenses currently adopt axial movement of the zoom group, or simultaneously move the zoom group and a part of the front lens group or the rear lens group. The distance between the zoom group and the front and rear groups of the lens is changed to compensate the requirement of image quality optimization under different focal lengths. The distance changing mode is basically spiral, namely, the distance between the zooming group and the front and rear groups of the lens is changed, the lens also rotates around the optical axis, the structure is quite complex, and the zooming process is quite complex. Correspondingly, the lens cone needs more devices in the manufacturing process, the processing technology is more complex, and the reduction of the production cost is not facilitated. Therefore, how to provide a convenient zooming mode is also an urgent problem to be solved.

In view of this, the embodiment of the present invention provides a lens system, which can improve the convenience of the zooming process of the lens system and reduce the production cost.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a lens system according to the present invention.

In an embodiment, the lens system 10 may be applied to an imaging device such as a projector, so that the projector has a zooming function, and a zooming process is convenient and fast, and because a zooming mode depends on a simple structure, a corresponding production cost is low, and thus the projector can meet design and market requirements of low cost.

Specifically, the lens system 10 is fixed in length in a direction parallel to an optical axis 11 thereof, and includes a first lens assembly 12, a second lens assembly 13, and a zoom lens assembly 14. The first and second lens components 12 and 13 may be the front and rear lens groups of the lens system 10. And the zoom lens assembly 14, as the name implies, has a variable focal length setting, so that the focal length of the lens system 10 is correspondingly changed by the focal length change of the zoom lens assembly 14.

FIG. 1 shows the first lens component 12 being the front lens group of the lens system 10 and the second lens component 13 being the rear lens group of the lens system 10 for discussion purposes only and not for limitation. In addition, in other embodiments of the present invention, the lens system 10 may only include the first lens component 12 and the zoom lens component 14, may only include the second lens component 13 and the zoom lens component 14, and may even only include the zoom lens component 14, which is not limited herein.

The lens system 10 further includes an adjustment device 15. The adjusting device 15 is connected to the lens of the zoom lens assembly 14 to adjust the focal length of the zoom lens assembly 14, and thus the focal length of the lens system 10, through the connected lens.

It should be noted that, in this embodiment, the relative position of the lens connected to the adjusting device 15 in the lens system 10 is fixed, which is different from a mode that a conventional lens zooms through moving the lens of the zooming group in the axial direction, and because the position of the lens connected to the adjusting device 15 in this embodiment is fixed, zooming can be achieved without moving, which means that the zooming process of the lens system 10 in this embodiment depends on a simple structure, and the zooming process is convenient, so that convenience of the zooming process of the lens system 10 can be improved, production cost can be reduced, and a design that an imaging device applying the lens system 10 in this embodiment takes low cost and market demand into consideration is achieved.

Please continue to refer to fig. 1. In one embodiment, the adjustment device 15 includes an adjustment handle 151. The adjusting handle 151 is connected to the lens of the zoom lens assembly 14, and is used for controlling the lens connected to the adjusting handle 151 to turn around a rotation axis (as shown by the axis α in fig. 1, the same applies below), i.e. controlling the lens to rotate 180 ° around the rotation axis, so that the focal length of the zoom lens assembly 14 is switched between the first focal length and the second focal length. Wherein the axis of rotation passes through the optical axis 11 of the lens system 10 and is perpendicular to the optical axis 11 of the lens system 10.

The lens connected to the adjusting handle 151, i.e. the target lens 141, the target lens 141 has a first surface 142 and a second surface 143 which are opposite to each other, and the first surface 142 and the second surface 143 have different structures, so that the focal length of the zoom lens assembly 14 after the lens connected to the adjusting handle 151 is flipped around the rotation axis is the first focal length, and the focal length of the zoom lens assembly 14 after the lens connected to the adjusting handle 151 is flipped again around the rotation axis is switched to the second focal length, that is, the zoom function of the lens system 10 is realized.

The first surface 142 and the second surface 143 of the target lens 141 are different in structure, so that when the target lens 141 is flipped over to have the first surface 142 facing the first lens element 12 or the second surface 143 facing the first lens element 12, the zoom lens element 14 has different focal lengths, and thus the lens system 10 has different focal lengths (i.e. the first focal length and the second focal length).

Further, the first surface 142 and the second surface 143 have different structures, specifically, the curvatures of the corresponding positions of the first surface 142 and the second surface 143 may be different; and/or the first surface 142 and the second surface 143 have different surface types, for example, one of the first surface 142 and the second surface 143 is a spherical surface, and the other is an aspherical surface, etc., which is not limited herein.

Further, the first focal length and the second focal length may be a telephoto end focal length and a wide-angle end focal length of the lens system 10, respectively. The reason why the lens system 10 provides the user with the choice of two focal lengths and discards the intermediate focal length between the telephoto end focal length and the wide-angle end focal length is that the inventor found that only the telephoto end focal length and the wide-angle end focal length are generally used in the actual using process, and the intermediate focal length between the telephoto end focal length and the wide-angle end focal length is used less frequently. Therefore, the embodiment provides two focal lengths, namely the telephoto end focal length and the wide-angle end focal length, for the user to select, and only needs to ensure the imaging quality of projection under the telephoto end focal length and the wide-angle end focal length, and does not need to achieve smooth focusing at any focal length between the telephoto end focal length and the wide-angle end focal length, thereby reducing the requirement on the lens system 10, and being beneficial to further simplifying the zooming process and reducing the production cost.

FIG. 1 shows the target lens element 141 flipped over with its first surface 142 facing the first lens component 12, with the focal length of the lens system 10 at the first focal length, the tele end focal length; fig. 2 shows the target lens 141 flipped over with its second surface 143 toward the first lens component 12, when the focal length of the lens system 10 is at the second focal length, i.e., the wide-angle end focal length. Of course, in other embodiments of the present invention, the first focal length may be a wide-angle end focal length, and the second focal length may be a telephoto end focal length, which is not limited herein.

Referring to fig. 3, fig. 3 is a schematic cross-sectional view of the lens system shown in fig. 1 in a direction a-a.

Further, the adjusting device 15 includes a snap ring 152. The snap ring 152 is clamped on the periphery of a lens (i.e. the target lens 141) of the zoom lens assembly 14, and the adjusting handle 151 is connected to the snap ring 152, so that the adjusting handle 151 is connected to the lens of the zoom lens assembly 14. The present embodiment provides a snap ring 152 to facilitate the connection of the adjustment lever 151 to the lens of the zoom lens assembly 14.

Please refer to fig. 1 and fig. 3. It should be noted that the lens system 10 further includes a lens barrel 16, the lens barrel 16 is used as a carrier, and the first lens assembly 12, the second lens assembly 13 and the zoom lens assembly 14 are all disposed on the lens barrel 16. Moreover, the adjusting handle 151 of the present embodiment extends to the outside of the lens barrel 16, and allows the lens (i.e. the target lens 141) to be turned over by rotating the adjusting handle 151, so that the focal length of the zoom lens assembly 14 can be conveniently and rapidly switched between the first focal length and the second focal length. The adjusting handle 151 may be directly operated by a user, or operated by another additionally designed mechanism, which is not limited herein.

Referring to fig. 4, fig. 4 is a schematic cross-sectional view of another embodiment of a lens system according to the present invention.

In one embodiment, the adjustment device 15 includes an adjustment assembly including a first adjustment member 153 and a second adjustment member 154. The first and second adjusters 153 and 154 are sequentially disposed in a direction away from the optical axis 11 of the lens system 10. The first adjuster 153 abuts against a lens of the zoom lens assembly 14, i.e., the target lens 141, and the target lens 141 is an elastic body. The contact surfaces of the first and second adjusters 153 and 154 are disposed at an angle to the optical axis 11 of the lens system 10, and the second adjuster 154 is movable in a direction parallel to the optical axis 11 of the lens system 10.

Fig. 4 shows that the cross-sectional structures of the first and second adjusters 153 and 154 are arranged in a wedge shape such that the extension surfaces of the contact surfaces of the first and second adjusters 153 and 154 are arranged at an angle to the optical axis 11 of the lens system 10.

In the above manner, in the process of moving the second adjusting member 154 in the direction parallel to the optical axis 11 of the lens system 10, the first adjusting member 153 is caused to move toward the optical axis 11 of the lens system 10, i.e., the first adjusting member 153 is caused to press the target lens 141. The target lens 141 is pressed by the first adjusting member 153 to deform, so that the curvature and the thickness of the target lens 141 change, and further the focal length of the zoom lens assembly 14 changes, thereby implementing the zoom function of the lens system 10, as shown in fig. 5.

Then, under the elastic restoring force of the objective lens 141, the first adjusting member 153 moves away from the optical axis 11 of the lens system 10, the objective lens 141 restores to the initial state, and the second adjusting member 154 moves in the opposite direction; or the second adjusting member 154 is moved in the opposite direction under the external force, so as to allow the first adjusting member 153 to move away from the optical axis 11 of the lens system 10 under the elastic restoring force of the objective lens 141, and further to restore the objective lens 141 to the initial state, as shown in fig. 4.

It should be noted that the magnitude of the acting force applied to the target lens 141 by the first adjusting member 153, the variation of the curvature and the thickness of the target lens 141, and the focal length of the target lens 141 satisfy a preset relationship, which is obtained through a large number of calculations, simulations, and experiments, and the variation of the curvature and the thickness corresponding to the target lens 141 is determined according to the focal length required by the target lens 141, so as to determine the magnitude of the acting force that the first adjusting member 153 needs to apply to the target lens 141, so that the target lens 141 has the required focal length.

Furthermore, a limiting mechanism corresponding to the second adjusting member 154 may be additionally provided to guide the second adjusting member 154 to move along a direction parallel to the optical axis 11 of the lens system 10, which is not limited herein.

Please continue to refer to fig. 4 and 5. Further, the lens system 10 further includes a lens barrel 16, and the adjustment assembly further includes a limiting member 155. The limiting member 155 is fixed to the lens barrel 16, the first adjusting member 153 is slidably connected to the limiting member 155, and the limiting member 155 extends along a direction perpendicular to the optical axis 11 of the lens system 10, so that the first adjusting member 153 can move along the direction perpendicular to the optical axis 11 of the lens system 10. The limiting member 155 is configured to limit the first adjusting member 153 from moving with the second adjusting member 154 during the process that the second adjusting member 154 moves in the direction parallel to the optical axis 11 of the lens system 10, so that the first adjusting member 153 moves toward the optical axis 11 of the lens system 10, and further presses the target lens 141.

Alternatively, the lens against which the first adjusting member 153 abuts, i.e. the target lens 141, may be made of transparent and elastic material, such as transparent silicone, transparent TPE (Thermoplastic Elastomer), etc. When the lens system 10 of the embodiment is applied to an imaging device such as a micro-projector, the micro-projector has a low brightness, generates a low amount of heat, and has a relatively small influence on the performance such as curvature of the lens, so that the lens system also has high stability even if the lens is made of the transparent and elastic material.

In one embodiment, the adjusting device 15 includes two sets of adjusting components, and the first adjusting components 153 of the two sets of adjusting components are oppositely disposed on two sides of the zoom lens component 14 and are used for cooperatively pressing the target lens 141 from two opposite sides of the target lens 141 of the zoom lens component 14, so that the target lens 141 is not deviated from the optical axis 11 of the lens system 10 even if pressed, which is beneficial to ensuring the imaging effect.

In an alternative embodiment, the first adjustor 153 and the second adjustor 154 are annular, and the target lens 141, the first adjustor 153, and the second adjustor 154 are sequentially nested. Specifically, the first adjusting member 153 is sleeved on the periphery of the target lens 141, and the second adjusting member 154 is sleeved on the periphery of the first adjusting member 153. The first adjustment member 153 may also be an elastic body having a certain elasticity. As such, when the second adjusting member 154 moves in a direction parallel to the optical axis 11 of the lens system 10, the second adjusting member 154 compresses the first adjusting member 153, such that the first adjusting member 153 moves toward the optical axis 11 of the lens system 10 to press the target lens 141.

In this way, the target lens 141 of the zoom lens assembly 14 receives the extrusion of the annular first adjusting part 153, and the extrusion degree of each position on the periphery of the target lens 141 is relatively consistent, which is beneficial to ensuring the imaging effect, and meanwhile, the target lens 141 can be prevented from deviating from the optical axis 11 of the lens system 10, which is further beneficial to ensuring the imaging effect.

Optionally, the front and back faces of the target lens 141 may be configured identically (including curvature, face shape, etc.) to facilitate processing of the lens. Of course, the structures of the front and back surfaces of the target lens 141 can be differently configured according to the requirement of image quality optimization, and are not limited herein.

It can be understood that the present embodiment can realize the zooming of the lens system 10 to different focal lengths by using the adjustment component, and only needs to deform the target lens 141 to different degrees. However, considering that only the telephoto end focal length and the wide-angle end focal length are generally used in the actual use process as explained in the above embodiments, and the intermediate focal length between the telephoto end focal length and the wide-angle end focal length has a low use frequency, the present embodiment preferably sets the target lens 141 in its natural deformation-free state and in its deformation-generated state corresponding to the focal length of the lens system 10 at the telephoto end and the wide-angle end, respectively.

For example, fig. 4 shows that the focal length of the lens system 10 is at the telephoto end state when the target lens 141 is in the natural deformation-free state; fig. 5 shows that when the second adjusting element 154 moves to the abutting limiting element 155 along a direction parallel to the optical axis 11 of the lens system 10, the first adjusting element 153 presses the target lens 141 to the maximum extent, and the current deformation state of the target lens 141 causes the focal length of the lens system 10 to be in the wide-angle end state. As such, the focal length of the lens system 10 can be conveniently controlled to switch between the telephoto end and the wide-angle end.

Of course, in other embodiments of the present invention, when the target lens 141 is in a natural non-deformed state, the focal length of the lens system 10 is in the wide-angle end state, and when the target lens 141 is in a deformed state, the focal length of the lens system 10 is in the telephoto end state.

It should be noted that the zoom lens assembly 14 may include one or more lenses, and the lenses of the zoom lens assembly 14 cooperate with each other such that the zoom lens assembly 14 has a corresponding focal length. Similarly, the first lens assembly 12, the second lens assembly 13 and the zoom lens assembly 14 cooperate with each other to provide the lens system 10 with a corresponding focal length.

Also, an adjustment device 15 may be coupled to one or more lenses of the zoom lens assembly 14 for adjusting the focal length of the zoom lens assembly 14. For example, an adjusting handle 151 may be provided for each lens connected to the adjusting device 15, for controlling each lens connected to the adjusting device 15 to turn over, as shown in fig. 1; or an adjustment assembly may be provided separately for each lens to which the adjustment device 15 is connected for controlling the curvature and thickness of each lens to which the adjustment device 15 is connected, as shown in fig. 4.

Furthermore, the utility model discloses a mode that the upset lens that above-mentioned embodiment provided realized zooming and the mode that the extrusion lens realized zooming all can realize zooming with traditional axial displacement lens and combine together to satisfy the image quality optimization requirement of different zoom ratios.

It can be seen that the utility model provides a lens system, it includes adjusting device, and adjusting device adjusts the focus of zooming lens subassembly through the lens that it connects, and then adjusts the focus of lens system, realizes zooming promptly. Different from the mode that traditional camera lens zooms the lens of group through axial displacement the utility model discloses the zooming in-process of lens system, the relative position of the lens that adjusting device connects in lens system is fixed, need not to remove promptly and can realize zooming, means the utility model discloses the simple structure that the zooming process of lens system depended on to it is comparatively convenient to zoom the process, and convenience of customers' operation therefore can improve the convenience of lens system zooming process.

And, the utility model provides a lens system, because the optimization state of design is few, so its resolution is better, the luminance loss is less to the structure is simple and easy, and the preparation technology that corresponds is also comparatively simple.

Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of the imaging device of the present invention.

In one embodiment, the imaging apparatus includes an imaging device 20 and a lens system 10, and the imaging device 20 is disposed corresponding to the lens system 10. In which the lens system 10 is used to project the image output by the imaging device 20, particularly to an additional screen, a curtain, a wall, etc., when the imaging device is a projector, especially a micro-projector. The lens system 10 of the present embodiment has been described in detail in the above embodiments, and will not be described herein again.

It can be understood that when the lens system 10 is switched to different Focal lengths or the projection distance of the imaging device is changed, the Back Focal Length (BFL) of the lens of the imaging device is adjusted to compensate, so as to realize clear imaging, as shown in fig. 6. Wherein, the back focal length is defined as the distance from the vertex of the optical surface closest to the imaging device 20 in the lens system 10 to the imaging device 20.

Alternatively, the imaging Device 20 may be a DMD (Digital Micromirror Device) or the like, which is not limited herein.

Further, the imaging apparatus may further include a secondary optic 30, the secondary optic 30 is disposed between the lens system 10 and the imaging device 20, and the secondary optic 30 may include a prism, a galvanometer, and the like, which are not limited herein.

Furthermore, in the present invention, unless otherwise expressly specified or limited, the terms "connected," "stacked," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A lens system, characterized in that the lens system comprises:

a zoom lens assembly;

the adjusting device is connected with the lens in the zooming lens assembly so as to adjust the focal length of the zooming lens assembly through the lens and further adjust the focal length of the lens system, wherein the relative position of the lens in the lens system is fixed.

2. The lens system according to claim 1,

the adjusting device comprises an adjusting handle, the adjusting handle is connected with a lens in the zoom lens assembly and is used for controlling the lens connected with the adjusting handle to turn around a rotating shaft, so that the focal length of the zoom lens assembly is switched between a first focal length and a second focal length;

the rotating shaft passes through the optical axis of the lens system and is perpendicular to the optical axis, the lens connected with the adjusting handle is provided with a first surface and a second surface which are opposite, and the first surface and the second surface are different in structure.

3. The lens system of claim 2, wherein the adjustment device comprises a snap ring that is engaged with an outer periphery of a lens of the variable focus lens assembly, and the adjustment handle is coupled to the snap ring.

4. The lens system according to claim 2,

the curvatures of the corresponding positions of the first surface and the second surface are different; and/or

The first surface and the second surface have different surface types.

5. The lens system of claim 1, wherein the adjustment device includes an adjustment assembly including a first adjustment member and a second adjustment member, the first adjustment member and the second adjustment member being sequentially disposed in a direction away from an optical axis of the lens system, the first adjustment member abutting a lens in the zoom lens assembly, the lens against which the first adjustment member abuts being an elastomer, contact surfaces of the first adjustment member and the second adjustment member being disposed at an angle to the optical axis of the lens system, and the second adjustment member being movable in a direction parallel to the optical axis of the lens system such that the first adjustment member presses the lens against which it abuts.

6. The lens system of claim 5, wherein the lens system comprises a lens barrel, the adjusting assembly comprises a limiting member fixed to the lens barrel, and the first adjusting member is slidably connected to the limiting member and capable of moving in a direction perpendicular to an optical axis of the lens system.

7. A lens system according to claim 5 or 6, characterized in that the adjustment means comprises two sets of adjustment members, the first adjustment members of the two sets of adjustment members being oppositely disposed on both sides of the zoom lens member.

8. The lens system according to claim 5 or 6, wherein the first adjusting member and the second adjusting member are annular, and the lens abutted by the first adjusting member, the first adjusting member and the second adjusting member are sequentially nested.

9. A lens system as recited in claim 1, wherein the length of the lens system in a direction parallel to its optical axis is fixed.

10. An imaging apparatus characterized by comprising an imaging device and the lens system according to any one of claims 1 to 9, the imaging device being provided corresponding to the lens system.

Images