A lens adjustment device

Abstract

The utility model discloses a lens adjusting device, this lens adjusting device includes first fixed seat, intermediate fixed seat, last fixed seat and multi -freedom degree adjusting mechanism, and multi -freedom degree adjusting mechanism includes at least three adjusting components, and each adjusting component includes a driving part and a function restraint piece, and the function restraint piece is configured as, under the drive of driving part, can produce at least one direction's constraint between last fixed seat, when driving part drives function restraint piece synchronous movement, at least three adjusting components jointly drive last fixed seat and move along third linear direction. When the relative motion of driving part and function restraint piece, at least three adjusting components jointly drive last fixed seat and incline around the axis parallel to first linear direction or second linear direction. Therefore, the utility model saves the space of lens adjusting device, simplifies the structure, can realize high accuracy's multi -freedom degree adjustment in the compact narrow space.

Description

Technical Field

[0001] This utility model relates to the field of optical assembly technology, specifically to a lens adjustment device. Background Technology

[0002] In optical paths using multiple lenses, the lenses must be coaxial and focal. For general precision applications, coaxiality and focal length can be achieved through machining precision. However, in multi-lens optical paths requiring higher precision, a fine-tuning mechanism is needed to precisely adjust the coaxiality and focal length of the lenses to achieve high accuracy.

[0003] In existing technical solutions, fine-tuning is mainly achieved through multi-dimensional adjustment frames. However, due to the compact installation space of some optical devices, conventional adjustment mechanisms are difficult to install. Therefore, an adjustment mechanism is needed to achieve coaxial and parfocal alignment of the optical lens under the constraints of a small space. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a lens adjustment device for achieving coaxial and parfocal adjustment of multiple optical lenses within a small installation space.

[0005] To achieve the above and other related objectives, this utility model provides a lens adjustment device, defining a first linear direction, a second linear direction perpendicular to the first linear direction, and a third linear direction perpendicular to both the first and second linear directions. Along the third linear direction, the lens adjustment device sequentially includes a first fixing seat, a middle fixing seat, and a last fixing seat, with adjacent fixing seats interconnected. Each fixing seat includes a coaxially arranged mounting hole for mounting or accommodating a lens. The first fixing seat is used to mount a first lens; the last fixing seat is used to mount a second lens. The lens adjustment device further includes:

[0006] A multi-degree-of-freedom adjustment mechanism is disposed at the connection between the intermediate fixed seat and the final fixed seat. The multi-degree-of-freedom adjustment mechanism includes at least three adjustment components. Each adjustment component includes a driving element and a functional constraint element. The functional constraint element is configured to generate a constraint with the final fixed seat in at least one direction under the drive of the driving element.

[0007] When the driving component drives the functional constraint component to move synchronously, at least three adjustment components work together to drive the last fixed seat to move along the third straight line direction.

[0008] When the driving component and the functional constraint component move relative to each other, at least three adjustment components work together to cause the end fixed seat to tilt about an axis parallel to the first straight line direction or the second straight line direction.

[0009] Optionally, the multi-degree-of-freedom adjustment mechanism includes three adjustment components, the functional constraint components of which are respectively formed as a constraint component, an anti-rotation component, and a support component; the constraint component is used to restrict the movement of the last fixed seat in a plane perpendicular to the third straight line direction; the anti-rotation component is used to restrict the rotation of the last fixed seat about an axis parallel to the third straight line direction; and the support component is used to provide support along the third straight line direction.

[0010] Optionally, the constraint element is a tapered pad whose tapered surface contacts the drive element to provide radial constraint.

[0011] Optionally, the anti-rotation component is a grooved gasket with a long slot, through which the driving component passes and connects to the intermediate fixed seat.

[0012] Optionally, the support element is a flat pad.

[0013] Optionally, the drive element is a screw or a set screw.

[0014] Optionally, the intermediate fixing seat includes a first intermediate fixing seat, a second intermediate fixing seat and a third intermediate fixing seat in sequence along the third straight line direction, with the first intermediate fixing seat being disposed near the first fixing seat and the third intermediate fixing seat being disposed near the last fixing seat.

[0015] Optionally, the lens adjustment device also includes:

[0016] The first direction adjustment mechanism includes a first adjustment structure and a first guide structure. The first adjustment structure is disposed on a first intermediate fixed seat, and the first guide structure is disposed at the connection between the first intermediate fixed seat and the second intermediate fixed seat and extends along a first straight line direction. Adjusting the first adjustment structure drives the second intermediate fixed seat to move along the first guide structure.

[0017] The second direction adjustment mechanism includes a second adjustment structure and a second guide structure. The second adjustment structure is disposed on the first intermediate fixed seat, and the second guide structure is disposed at the connection between the second intermediate fixed seat and the third intermediate fixed seat and extends along the second straight line direction. Adjusting the second adjustment structure drives the third intermediate fixed seat to move along the second guide structure.

[0018] Optionally, each fixing seat includes a top surface and a bottom surface opposite to each other, and a front surface and a rear surface opposite to each other; the top surface or bottom surface is parallel to the plane formed by the first straight direction and the second straight direction, and the front surface or rear surface is parallel to the plane formed by the first straight direction and the third straight direction; the first adjustment structure is disposed on the front or rear surface of the first intermediate fixing seat and extends towards the second intermediate fixing seat along the third straight direction, and the second adjustment structure is disposed on the top surface of the first intermediate fixing seat and extends towards the third intermediate fixing seat along the third straight direction.

[0019] Optionally, the first guide structure includes a first guide boss and a first guide groove, the first guide boss being disposed on a first intermediate fixed seat and the first guide groove being disposed on a second intermediate fixed seat, or the first guide boss being disposed on a second intermediate fixed seat and the first guide groove being disposed on a first intermediate fixed seat; the second guide structure includes a second guide boss and a second guide groove, the second guide boss being disposed on a second intermediate fixed seat and the second guide groove being disposed on a third intermediate fixed seat, or the second guide boss being disposed on a third intermediate fixed seat and the second guide groove being disposed on a second intermediate fixed seat.

[0020] Compared with the prior art, the lens adjustment device of this utility model has at least the following beneficial effects:

[0021] The lens adjustment device of this utility model defines a first linear direction, a second linear direction perpendicular to the first linear direction, and a third linear direction perpendicular to both the first and second linear directions. Along the third linear direction, the lens adjustment device sequentially includes a first fixing seat, a middle fixing seat, and a last fixing seat, with adjacent fixing seats interconnected. Each fixing seat includes a coaxially arranged mounting hole for mounting or accommodating a lens. The first fixing seat is used to mount a first lens, and the last fixing seat is used to mount a second lens. The lens adjustment device also includes a multi-degree-of-freedom adjustment mechanism, located at the connection between the middle and last fixing seats. The multi-degree-of-freedom adjustment mechanism includes at least three adjustment components, each including a driving element and a functional constraint element. The functional constraint element is configured such that, driven by the driving element, it can generate a constraint in at least one direction with the last fixing seat.

[0022] When the driving component drives the functional constraint component to move synchronously, at least three adjustment components jointly drive the end-position fixed seat to move along the third straight line direction. When the driving component and the functional constraint component move relative to each other, at least three adjustment components jointly drive the end-position fixed seat to tilt about an axis parallel to the first or second straight line direction. Thus, this invention can achieve the movement of the end-position fixed seat along the third straight line direction or the tilting about an axis parallel to the first or second straight line direction by setting a multi-degree-of-freedom adjustment mechanism, that is, to realize the movement of the second lens in the Rx, Ry, and Z directions. Since each degree of freedom is not set with a separate adjustment knob, but rather uses a combination of the driving component and the functional constraint component, and multi-degree-of-freedom adjustment is achieved by changing the relative state of the two, this setting saves space in the lens adjustment device, simplifies the structure, and enables high-precision multi-degree-of-freedom adjustment in a compact and confined space.

[0023] The lens adjustment device of this utility model is further provided with a first direction adjustment mechanism and a second direction adjustment mechanism. The first direction adjustment mechanism and the second direction adjustment mechanism can realize large-scale adjustment of the lens in the first linear direction and the second linear direction. When the adjustment needs cannot be met by using a multi-degree-of-freedom adjustment mechanism, these two adjustment mechanisms can be used to adjust the position in the first linear direction and the second linear direction. Alternatively, the first direction adjustment mechanism and the second direction adjustment mechanism can be coaxially adjusted in a large direction first, and then the multi-degree-of-freedom adjustment mechanism can be used for parfocal adjustment.

[0024] The overall fixing position and the mutually cooperating structural arrangement of this utility model make the overall structure occupy less space, making it suitable for optical equipment in confined spaces. Attached Figure Description

[0025] Figure 1 This is an exploded view of the overall structure of the lens adjustment device in the embodiment of this utility model.

[0026] Figure 2 This is a schematic diagram of the lens adjustment device in an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the first intermediate fixing seat in an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the second intermediate fixing seat in an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the third intermediate fixing seat in an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the last fixed seat in an embodiment of this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the first adjusting screw or the second adjusting screw in the embodiments of this utility model.

[0032] Illustration of reference numerals in the attached diagram:

[0033] 100. First fixing seat; 200. Intermediate fixing seat; 210. First intermediate fixing seat; 211. First direction adjustment mechanism; 2111. First protruding plate; 2112. First mounting groove; 2113. First adjusting screw; 2114. Nut; 2115. Screw; 2116. Boss structure; 212. Second direction adjustment mechanism; 2121. Second protruding plate; 2122. Second mounting groove; 2123. Second adjusting screw; 213. First guide boss; 220. Second intermediate fixing seat; 221. First guide groove; 222. Second guide boss; 223. Accommodating opening; 224. First fixing screw; 225. First fixing screw hole; 230. Third intermediate fixing seat; 231. Second guide groove; 232. Second fixing screw; 2321. Second fixing screw hole; 233. Constraint component; 234. Anti-rotation component; 235. Support component; 300. End fixing seat; 310. Third fixing screw; 311. Third fixing screw hole; 320. Driving component; 400. Base plate; 501. First lens; 502. Second lens; X, First linear direction; Y, Second linear direction; Z, Third linear direction. Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0035] It should be understood that the illustrations provided in the embodiments of this utility model are merely schematic representations of the basic concept of this utility model. Although the illustrations only show components related to this utility model and are not drawn according to the actual number, shape, and size of components in implementation, the shape, quantity, and proportion of each component can be arbitrarily changed in actual implementation, and the layout of the components may also be more complex. The structures, proportions, sizes, etc., shown in the accompanying drawings are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this application.

[0036] Example 1

[0037] This embodiment provides a lens adjustment device, referring to... Figure 1 or Figure 2 The lens adjustment device defines a first linear direction X, a second linear direction Y perpendicular to the first linear direction X, and a third linear direction Z perpendicular to both the first linear direction X and the second linear direction Y. Along the third linear direction Z, the lens adjustment device sequentially includes a first fixing seat 100, a middle fixing seat 200, and a last fixing seat 300, with adjacent fixing seats interconnected. Each fixing seat includes coaxially arranged mounting holes (not shown in the figure) for mounting or accommodating lenses. The first fixing seat 100 is used to mount the first lens 501, and the last fixing seat 300 is used to mount the second lens 502. Multiple lenses can be coaxially positioned using the high-precision coaxially arranged lens mounting holes on multiple fixing seats.

[0038] To further achieve coaxiality and focus of multiple lenses, the lens adjustment device in this embodiment also includes a multi-degree-of-freedom adjustment mechanism. This multi-degree-of-freedom adjustment mechanism is located at the connection between the intermediate fixed seat 200 and the end fixed seat 300, and is used to adjust the end fixed seat 300 on which the second lens 502 is mounted in multiple degrees of freedom, so as to achieve coaxiality and focus with the first lens 501.

[0039] Specifically, refer to Figure 1 The multi-degree-of-freedom adjustment mechanism includes at least three adjustment components. Each adjustment component includes a drive member 320 and a functional constraint member 233. The functional constraint member 233 is configured to generate a constraint in at least one direction with the end-position fixed seat 300 under the drive of the drive member 320. When the drive member 320 drives the functional constraint member 233 to move synchronously, the at least three adjustment components jointly drive the end-position fixed seat 300 to move along the third linear direction Z. When the drive member 320 and the functional constraint member 233 move relative to each other, the at least three adjustment components jointly drive the end-position fixed seat 300 to tilt about an axis parallel to the first linear direction X or the second linear direction Y. Thus, this embodiment can achieve multi-degree-of-freedom adjustment of the second lens 502 in the Rx, Ry, and Z directions by driving the end-position fixed seat 300 to move along the third linear direction Z or tilt about an axis parallel to the first linear direction X or the second linear direction Y, thereby achieving the purpose of parfocal adjustment.

[0040] Optionally, refer to Figure 1The multi-degree-of-freedom adjustment mechanism includes three adjustment components. The functional constraint members 233 in these three components are respectively formed as a constraint member 233, an anti-rotation member 234, and a support member 235. The constraint member 233, anti-rotation member 234, and support member 235 are spaced apart on the surface of the intermediate fixed seat 200 near the end fixed seat 300. The constraint member 233 is used to restrict the movement of the end fixed seat 300 in a plane perpendicular to the third linear direction Z. In this embodiment, the constraint member 233 is a conical pad, the conical surface of which contacts the drive member 320 to provide radial constraint. In other embodiments, the constraint member 233 can also be other structures with radial constraint. The anti-rotation member 234 is used to restrict the rotation of the end fixed seat 300 about an axis parallel to the third linear direction Z. The anti-rotation member 234 is a grooved pad with a long slot, through which the drive member 320 passes and connects to the intermediate fixed seat 200. In other embodiments, the anti-rotation member 234 can also be other structures that achieve unidirectional constraint, and this utility model does not limit this. The support member 235 provides support along the third linear direction Z. In this embodiment, the support member 235 is a flat washer, used as a fulcrum to allow the drive member 320 to rotate on this fulcrum. The drive member 320 is disposed on the surface of the end fixed seat 300 near the middle fixed seat 200. The drive member 320 is disposed in a one-to-one correspondence with the aforementioned functional constraint member 233. In this embodiment, the drive member 320 is a screw or set screw.

[0041] Optionally, refer to Figure 1 and Figure 6 The end-position fixing seat 300 is also provided with a third fixing screw hole 311 and a third fixing screw 310. After multi-degree-of-freedom adjustment, the position of the end-position fixing seat 300 is fixed by the third fixing screw 310 installed in the third fixing screw hole 311.

[0042] Optionally, refer to Figure 1 or Figure 2 The lens adjustment device also includes a base plate 400, a first fixing seat 100 and a middle fixing seat 200 disposed on the base plate 400 to form a support frame, and a last fixing seat 300 coaxially disposed on the middle fixing seat 200.

[0043] The multi-degree-of-freedom adjustment mechanism of this embodiment can realize multi-degree-of-freedom adjustment of the second lens. Moreover, the adjustment of each degree of freedom is not set with a separate adjustment knob, but is achieved by a combination of the driving component 320 and the functional constraint component 233, by changing the relative state of the two. This setting saves space for the lens adjustment device, simplifies the structure, and enables high-precision multi-degree-of-freedom adjustment in a compact and narrow space.

[0044] Example 2

[0045] This embodiment provides a lens adjustment device. The similarities between this lens adjustment device and the lens adjustment device in Embodiment 1 will not be repeated here. The differences are as follows:

[0046] Reference Figure 1 and Figure 2 In this embodiment, the intermediate fixing base 200 of the lens adjustment device includes, sequentially along the third straight line direction Z, a first intermediate fixing base 210, a second intermediate fixing base 220, and a third intermediate fixing base 230. The first intermediate fixing base 210 is disposed near the first fixing base 100, and the third intermediate fixing base 230 is disposed near the last fixing base 300. A first direction adjustment mechanism 211 is disposed between the first intermediate fixing base 210 and the second intermediate fixing base 220, and a second direction adjustment mechanism 212 is disposed between the second intermediate fixing base 220 and the third intermediate fixing base 230 to respectively realize the position adjustment of the second lens 502 in the first straight line direction X and the second straight line direction Y. The first fixing base 100 and the first intermediate fixing base 210 are disposed on the base plate 400 to form a support frame, and the second intermediate fixing base 220, the third intermediate fixing base 230, and the last fixing base 300 are coaxially disposed on the first intermediate fixing base 210.

[0047] The first direction adjustment mechanism 211 includes a first adjustment structure and a first guide structure. The first adjustment structure is disposed on the first intermediate fixed seat 210, and the first guide structure is disposed at the connection between the first intermediate fixed seat 210 and the second intermediate fixed seat 220 and extends along the first straight direction X. Adjusting the first adjustment structure drives the second intermediate fixed seat 220 to move along the first guide structure.

[0048] Reference Figure 2 Each fixed seat is defined to include a top surface and a bottom surface that are oppositely arranged, and a front surface and a rear surface that are oppositely arranged. The top surface or bottom surface is parallel to the plane formed by the first linear direction X and the second linear direction Y, and the front surface or rear surface is parallel to the plane formed by the first linear direction X and the third linear direction Z. The first adjustment structure is disposed on the front or rear of the first intermediate fixed seat 210 and extends towards the second intermediate fixed seat 220 along the third linear direction Z.

[0049] In this embodiment, refer to Figure 2 and Figure 3 The first adjustment structure includes a first protruding plate 2111 extending from the first intermediate fixed seat 210 to the second intermediate fixed seat 220, a first mounting groove 2112 disposed on the first protruding plate 2111, and a first adjusting screw 2113 installed in the first mounting groove 2112. Optionally, the first mounting groove 2112 is a U-shaped groove. The first adjusting screw 2113 is a push-pull structure, capable of pushing out or pulling back the second intermediate fixed seat 220 along the first linear direction X. (Refer to...) Figure 7The first adjusting screw 2113 includes a screw 2115, a nut 2114 disposed at one end of the screw 2115, and a boss structure 2116 disposed on the screw 2115 at a distance from the nut 2114. The surfaces of the nut 2114 and the boss structure 2116 opposite each other are used for pushing out, and the surfaces of the boss structure 2116 and the nut 2114 opposite each other are used for pulling back. Of course, the first adjusting structure can also be other structures capable of driving the second intermediate 220 fixing seat to reciprocate along the first linear direction X, and this embodiment does not limit this.

[0050] Reference Figure 1 The first guide structure includes a first guide boss 213 and a first guide groove 221. The first guide boss 213 is disposed on the first intermediate fixing seat 210 and the first guide groove 221 is disposed on the second intermediate fixing seat 220, or the first guide boss 213 is disposed on the second intermediate fixing seat 220 and the first guide groove 221 is disposed on the first intermediate fixing seat 210.

[0051] Optionally, refer to Figure 1 and Figure 4 The second intermediate fixing seat 220 is provided with a first fixing screw 224 and a first fixing screw hole 225. After adjustment by the first direction adjustment mechanism 211, the first fixing screw 224 is connected to the screw hole on the first intermediate fixing seat 210 through the first fixing screw hole 225 to achieve the positioning of the second intermediate fixing seat 220. Optionally, the first fixing screw hole 210 is provided with adjustment space.

[0052] The second direction adjustment mechanism 212 includes a second adjustment structure and a second guide structure. The second adjustment structure is disposed on the first intermediate fixed seat 210, and the second guide structure is disposed at the connection between the second intermediate fixed seat 220 and the third intermediate fixed seat 230 and extends along the second straight direction Y. Adjusting the second adjustment structure drives the third intermediate fixed seat 230 to move along the second guide structure.

[0053] Reference Figure 1 or Figure 2 The second adjustment structure is disposed on the top surface of the first intermediate fixing seat 210 and extends along the third straight direction Z towards the third intermediate fixing seat 230. (Refer to...) Figure 2 and Figure 3 The second adjustment structure includes a second protruding plate 2121 extending from the first intermediate fixed seat 210 to the third intermediate fixed seat 230, a second mounting groove 2122 disposed on the second protruding plate 2121, and a second adjusting screw 2123 installed in the second mounting groove 2122. Optionally, the second mounting groove 2122 is a U-shaped groove. The second adjusting screw 2123 is a push-pull structure, capable of pushing out or pulling back the second intermediate fixed seat 220 along the second linear direction Y. (Refer to...) Figure 7The second adjusting screw 2123 includes a screw 2115, a nut 2114 disposed at one end of the screw 2115, and a boss structure 2116 disposed on the screw 2115 at a distance from the nut 2114. The surfaces of the nut 2114 and the boss structure 2116 opposite each other are used for pushing out, and the surfaces of the boss structure 2116 and the nut 2114 opposite each other are used for pulling back. Optionally, the top surface of the second intermediate fixing seat 220 is provided with a receiving opening 223 to avoid the second adjusting structure. Of course, the second adjusting structure can also be other structures capable of driving the second fixing seat to reciprocate along the first linear direction X, and this embodiment does not limit this.

[0054] Reference Figure 1 The second guide structure includes a second guide boss 222 and a second guide groove 231. The second guide boss 222 is disposed on the second intermediate fixed seat 220 and the second guide groove 231 is disposed on the third intermediate fixed seat 230, or the second guide boss 222 is disposed on the third intermediate fixed seat 230 and the second guide groove 231 is disposed on the second intermediate fixed seat 220.

[0055] Optionally, refer to Figure 1 and Figure 5 The third intermediate fixing seat 230 is provided with a second fixing screw 232 and a second fixing screw hole 2321. After adjustment by the second direction adjustment mechanism 212, the second fixing screw 232 is screwed into the screw hole on the second intermediate fixing seat 220 through the second fixing screw hole 2321, thereby positioning the third intermediate fixing seat 230. Optionally, the second fixing screw hole 2321 is provided with adjustment space.

[0056] In this embodiment, the first direction adjustment mechanism 211 and the second direction adjustment mechanism 212 can achieve significant adjustments to the second lens 502 in the first linear direction X and the second linear direction Y. When the adjustment requirements cannot be met by using a multi-degree-of-freedom adjustment mechanism, these two adjustment mechanisms can be used to adjust the position in the first linear direction X and the second linear direction Y. Alternatively, the first direction adjustment mechanism 211 and the second direction adjustment mechanism 212 can be coaxially adjusted in a large direction first, and then the multi-degree-of-freedom adjustment mechanism can be used for parfocal adjustment.

[0057] The positions of the various fixing seats and the structural arrangement of their mutual cooperation in this embodiment result in a small overall space occupation, making it suitable for use in optical devices with limited space.

[0058] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A lens adjustment device, characterized in that, A first straight line direction, a second straight line direction perpendicular to the first straight line direction, and a third straight line direction perpendicular to both the first and second straight line directions are defined. Along the third straight line direction, the lens adjustment device sequentially includes a first fixing seat, a middle fixing seat, and a last fixing seat, with adjacent fixing seats interconnected. Each fixing seat includes a coaxially arranged mounting hole for mounting or accommodating the lens. The first fixing seat is used to mount the first lens. The end-position mounting bracket is used to install the second lens; The lens adjustment device also includes: A multi-degree-of-freedom adjustment mechanism is disposed at the connection between the intermediate fixed seat and the final fixed seat. The multi-degree-of-freedom adjustment mechanism includes at least three adjustment components. Each adjustment component includes a driving element and a functional constraint element. The functional constraint element is configured to generate a constraint with the final fixed seat in at least one direction under the drive of the driving element. When the driving component drives the functional constraint component to move synchronously, the at least three adjustment components jointly drive the last fixed seat to move along the third straight line direction; When the driving member moves relative to the functional constraint member, the at least three adjustment components together drive the end-position fixed seat to tilt about an axis parallel to the first straight line direction or the second straight line direction.

2. The lens adjusting apparatus according to claim 1, characterized by The multi-degree-of-freedom adjustment mechanism includes three adjustment components, wherein the functional constraint components of the three adjustment components are respectively formed as a constraint component, an anti-rotation component, and a support component; the constraint component is used to restrict the movement of the end-position fixed seat in a plane perpendicular to the third straight line direction; the anti-rotation component is used to restrict the rotation of the end-position fixed seat about an axis parallel to the third straight line direction; and the support component is used to provide support along the third straight line direction.

3. The lens adjustment device according to claim 2, characterized in that, The constraint element is a tapered pad, the tapered surface of which contacts the drive element to provide radial constraint.

4. The lens adjustment device according to claim 2, characterized in that, The anti-rotation component is a grooved gasket with a long slot, and the driving component passes through the long slot and is connected to the intermediate fixed seat.

5. The lens adjustment device according to claim 2, characterized in that, The support component is a flat pad.

6. The lens adjustment device according to claim 1, characterized in that, The driving component is a screw or set screw.

7. The lens adjustment device according to claim 1, characterized in that, The intermediate fixing base includes a first intermediate fixing base, a second intermediate fixing base and a third intermediate fixing base in sequence along the third straight line direction. The first intermediate fixing base is disposed near the first fixing base, and the third intermediate fixing base is disposed near the last fixing base.

8. The lens adjustment device according to claim 7, characterized in that, The lens adjustment device also includes: A first direction adjustment mechanism includes a first adjustment structure and a first guide structure. The first adjustment structure is disposed on the first intermediate fixed seat, and the first guide structure is disposed at the connection between the first intermediate fixed seat and the second intermediate fixed seat and extends along the first straight line direction. Adjusting the first adjustment structure drives the second intermediate fixed seat to move along the first guide structure. The second direction adjustment mechanism includes a second adjustment structure and a second guide structure. The second adjustment structure is disposed on the first intermediate fixed seat, and the second guide structure is disposed at the connection between the second intermediate fixed seat and the third intermediate fixed seat and extends along the second straight line direction. Adjusting the second adjustment structure drives the third intermediate fixed seat to move along the second guide structure.

9. The lens adjustment device according to claim 8, characterized in that, Each of the fixing seats includes a top surface and a bottom surface opposite to each other, and a front surface and a rear surface opposite to each other; the top surface or the bottom surface is parallel to the plane formed by the first straight direction and the second straight direction, and the front surface or the rear surface is parallel to the plane formed by the first straight direction and the third straight direction; the first adjustment structure is disposed on the front surface or the rear surface of the first intermediate fixing seat and extends towards the second intermediate fixing seat along the third straight direction, and the second adjustment structure is disposed on the top surface of the first intermediate fixing seat and extends towards the third intermediate fixing seat along the third straight direction.

10. The lens adjustment device according to claim 8, characterized in that, The first guide structure includes a first guide boss and a first guide groove. The first guide boss is disposed on the first intermediate fixed seat, and the first guide groove is disposed on the second intermediate fixed seat, or the first guide boss is disposed on the second intermediate fixed seat, and the first guide groove is disposed on the first intermediate fixed seat. The second guide structure includes a second guide boss and a second guide groove. The second guide boss is disposed on the second intermediate fixed seat, and the second guide groove is disposed on the third intermediate fixed seat, or the second guide boss is disposed on the third intermediate fixed seat, and the second guide groove is disposed on the second intermediate fixed seat.

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