A high-precision lens positioner

Abstract

The present invention provides a high-precision lens positioner, comprising a lens seat, a housing, a lens, a screw-on ring, a damping ring and a fine-tuning mechanism, wherein the screw-on ring is screwed and connected to the lens seat, the damping ring is arranged on the screw-on ring, a guide surface is arranged on the lens seat, the housing is slidably mounted on the guide surface, and the lens is mounted in the housing; the damping ring abuts against a side of the housing away from the guide surface, and the screw-on depth between the screw-on ring and the lens seat is adjusted to adjust the pressure applied by the damping ring on the housing; the fine-tuning mechanism is mounted on the lens seat, and the fine-tuning mechanism is used to drive the housing to slide on the guide surface. The high-precision lens positioner provided by the present invention can simultaneously achieve high precision, long stroke, and has self-locking capability and high stability.

Description

Technical Field

[0001] The invention relates to a high-precision driving device in an optical system, and in particular to a high-precision lens positioner. Background Art

[0002] High-precision drive devices are increasingly used in many fields such as advanced optical system integration, precision machinery manufacturing and ultra-precision machining, so they also need to meet various application requirements. High-precision drive devices are usually composed of a drive source and a flexible mechanism. The drive source outputs excitation, and the flexible mechanism has high rigidity and can recover its position, playing a guiding role. The design and selection of the two determine the stroke and precision of the drive device. The existing high-precision drive devices have a high output frequency of the drive source, and the larger the stroke, the lower the precision. The larger the deformation of the flexible mechanism, the higher the rigidity. Therefore, it is impossible to obtain long stroke and high precision at the same time. It is usually used in the field of ultra-precision machining. The field of advanced optical system integration has put forward requirements for high precision, long stroke, high stability, and lockable fixation for the application of high-precision drive devices. Therefore, the implementation plan of the high-precision drive device must be redesigned.

[0003] Based on the above description, it is difficult for existing ultra-precision drive devices to achieve high precision and long stroke at the same time, and to obtain self-locking ability and high stability at the same time. This requires a high-precision electronic drive source, which is expensive and difficult to achieve. Summary of the invention

[0004] The present invention aims to solve at least one of the above-mentioned technical problems and provide a high-precision lens positioner which can simultaneously achieve high precision, long stroke, self-locking capability and high stability.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a high-precision lens positioner, comprising a lens seat, a shell, a lens, a screw-on ring, a damping ring and a fine-tuning mechanism, wherein the screw-on ring is screwed together with the lens seat, the damping ring is arranged on the screw-on ring, a guide surface is arranged on the lens seat, the shell can be slidably mounted on the guide surface, and the lens is mounted in the shell; the damping ring abuts against a side of the shell away from the guide surface, and the screw-on depth between the screw-on ring and the lens seat can be adjusted to adjust the pressure applied by the damping ring on the shell; the fine-tuning mechanism is mounted on the lens seat, and the fine-tuning mechanism is used to drive the shell to slide on the guide surface.

[0007] In some embodiments, the fine-tuning mechanism is a fine-tuning screw, which is threadedly connected to the mirror base, and the inner end of the fine-tuning screw rests on the outer shell; rotating the fine-tuning screw can drive the outer shell to slide on the guide surface.

[0008] In some embodiments, the fine-tuning screws include three, and the three fine-tuning screws are evenly distributed on the periphery of the mirror base at an angle of 120° with respect to each other.

[0009] In some embodiments, an annular groove is provided on a side of the rotating ring close to the housing, and the damping ring is installed in the annular groove.

[0010] In some embodiments, the rotation ring and the damping ring are both flexible structures.

[0011] In some embodiments, the inner wall of the mirror base is provided with a discontinuous internal thread, the screw-on ring is provided with an external thread, and the screw-on ring and the mirror base are screwed together by the cooperation of the external thread and the internal thread.

[0012] In some embodiments, the rotating ring is a spindle-shaped structure, and a flexible groove is provided on the rotating ring.

[0013] In some embodiments, the fine-tuning mechanism is a fine-tuning screw, and the fine-tuning screw includes three screws that are evenly distributed on the outer circumference of the lens base at an angle of 120° to each other, and the internal thread is located at a position on the lens base corresponding to the fine-tuning screw.

[0014] The beneficial effects of the present invention are as follows: through the cooperation of the screw-in ring and the damping ring, the friction between the outer shell and the guide surface on the mirror seat can be adjusted, thereby reducing or increasing the damping between the outer shell and the mirror seat; at the same time, the outer shell is driven to slide on the mirror seat by the fine-tuning mechanism. Through the high-precision lens positioner, the screw-in depth of the screw-in ring and the mirror seat can be adjusted as needed, thereby adjusting the pressure applied by the damping ring on the outer shell, and further increasing the damping between the outer shell and the mirror seat; the different damping between the outer shell and the mirror seat can change the different adjustment control of the sliding distance of the outer shell on the mirror seat by the fine-tuning mechanism. In this way, the output damping can be increased by increasing the damping between the outer shell and the mirror seat, thereby achieving high-precision adjustment. At the same time, the fine-tuning mechanism can drive the outer shell to move on the mirror seat for a long stroke, and at the same time, after moving to a suitable position, the fine-tuning mechanism can position the outer shell at a fixed position on the mirror seat, thereby achieving self-locking ability and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of a high-precision lens positioner in one embodiment of the present invention.

[0016] Figure 2 It is a cross-sectional view of the internal structure of a high-precision lens positioner in one embodiment of the present invention.

[0017] Reference numerals:

[0018] Mirror base 10; housing 20; lens 30; screw ring 40; flexible groove 42; damping ring 50; fine-tuning mechanism 60. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The following will be combined with the attached Figure 1 and attached Figure 2 The high-precision lens 30 positioner provided by the present invention is described in detail.

[0024] like Figure 1 and Figure 2As shown, in one embodiment of the present invention, a high-precision lens 30 positioner is disclosed, including a lens base 10, a shell 20, a lens 30, a screw-on ring 40, a damping ring 50 and a fine-tuning mechanism 60, wherein the screw-on ring 40 is screwed together with the lens base 10, and the damping ring 50 is arranged on the screw-on ring 40. A guide surface is provided on the lens base 10, and the shell 20 is slidably mounted on the guide surface, and the lens 30 is mounted in the shell 20; the damping ring 50 abuts against a side of the shell 20 away from the guide surface, and the screw-on depth between the screw-on ring 40 and the lens base 10 can be adjusted to adjust the pressure applied by the damping ring 50 on the shell 20; the fine-tuning mechanism 60 is mounted on the lens base 10, and the fine-tuning mechanism 60 is used to drive the shell 20 to slide on the guide surface.

[0025] The high-precision lens 30 positioner provided by the present invention can adjust the friction between the outer shell 20 and the guide surface on the lens base 10 through the cooperation of the screw-on ring 40 and the damping ring 50, thereby reducing or increasing the damping between the outer shell 20 and the lens base 10; at the same time, the outer shell 20 is driven to slide on the lens base 10 through the fine-tuning mechanism 60. Through the high-precision lens 30 positioner, the screw-on depth of the screw-on ring 40 and the lens base 10 can be adjusted as needed, thereby adjusting the pressure applied by the damping ring 50 on the outer shell 20, and further increasing the damping between the outer shell 20 and the lens base 10; the damping between the outer shell 20 and the lens base 10 is different, and the fine-tuning mechanism 60 can be changed to adjust the sliding distance of the outer shell 20 on the lens base 10. In this way, the output damping can be increased by increasing the damping between the outer shell 20 and the lens base 10, thereby achieving high-precision adjustment. At the same time, the fine-tuning mechanism 60 can drive the housing 20 to move a long stroke on the mirror base 10. At the same time, after moving to a suitable position, the fine-tuning mechanism 60 can position the housing 20 at a fixed position on the mirror base 10 to achieve self-locking capability and high stability.

[0026] In one embodiment of the present invention, variable damping is output by the screw-on ring 40 and the damping ring 50, so that precision control of the fine-tuning mechanism 60 can be achieved. In theory, infinitely fine driving can be achieved, and high precision will no longer be obtained. While limiting the stroke, a long stroke can still be achieved. The relative position of the housing 20 and the mirror base 10 can be stably driven to change at any time, and the housing 20 has a self-locking capability, so that cost-effective integration can be achieved through manual drive.

[0027] In one embodiment of the present invention, the fine-tuning mechanism 60 is a fine-tuning screw, which is threadedly connected to the lens holder 10, and the inner end of the fine-tuning screw abuts against the housing 20; rotating the fine-tuning screw can drive the housing 20 to slide on the guide surface. Figure 2As shown, a mounting hole for mounting an adjustment screw is provided on the outer periphery of the mirror base 10, and the fine-adjustment screw is mounted in the mounting hole by means of a threaded connection; and the fine-adjustment screw can be rotated in the mounting hole, thereby adjusting the length of the fine-adjustment screw screwed into the mirror base 10. By rotating the fine-adjustment screw, while the fine-adjustment screw is screwed into the mirror base 10, its inner end drives the housing 20 to slide on the guide surface. After sliding to a predetermined position, the rotation of the fine-adjustment screw is stopped, and an inward pressure is provided to the housing 20 through a threaded connection, so that the housing 20 is locked at a fixed position on the mirror base 10, thereby realizing a self-locking function.

[0028] like Figure 1 As shown, the fine-tuning screws include three, and the three fine-tuning screws are evenly distributed on the periphery of the mirror base 10 at an angle of 120° to each other. In order to ensure the adjustment balance of the entire system, three adjustment screws are evenly distributed on the periphery of the mirror base 10; the stability of the system and the diversity of the drive are ensured.

[0029] like Figure 2 As shown, the side of the screw-on ring 40 close to the housing 20 is provided with an annular groove, and the damping ring 50 is installed in the annular groove. The damping ring 50 is installed in the annular groove. In some specific embodiments, the damping ring 50 is installed in the annular groove by interference fit; while achieving positioning, the stability of connection and driving is ensured. No matter how the fine-tuning mechanism 60 is adjusted, and how the housing 20 moves in the plane direction where the guide surface is located, the damping ring 50 will not be taken away from the annular groove.

[0030] In one embodiment of the present invention, the screw ring 40 and the damping ring 50 are both flexible structures. The design of the flexible structure ensures the buffering effect between the various structural parts on the one hand, and also ensures the connection stability between the various structures on the other hand. The flexible structure design of the damping ring 50 can increase the pressure change range between the housing 20 and the mirror base 10, and increase the possibility of adjustment.

[0031] like Figure 2 As shown, in order to reduce the difficulty of processing the lens holder 10, the inner wall of the lens holder 10 is provided with discontinuous internal threads, the screw-on ring 40 is provided with external threads, and the screw-on ring 40 and the lens holder 10 are screwed together through the cooperation of the external threads and the internal threads.

[0032] like Figure 2 As shown, the rotating ring 40 is a spindle-shaped structure, and a flexible groove 42 is provided on the rotating ring 40. The design of the flexible groove 42 makes the rotating ring 40 a flexible structure.

[0033] In one embodiment of the present invention, the fine-tuning mechanism 60 is a fine-tuning screw, and the fine-tuning screw includes three screws that are evenly distributed on the outer periphery of the lens base 10 at an angle of 120° to each other, and the internal thread is located at a position corresponding to the fine-tuning screw on the lens base 10. The position of the internal thread corresponds to the position of the fine-tuning screw, which reduces the difficulty of processing, coordinates the force position of the entire device, and improves stability.

[0034] In a specific embodiment of the present invention, three fine-tuning mechanisms 60 are evenly distributed on the outer periphery of the mirror base 10 at an angle of 120° to each other, and the fine-tuning mechanisms 60 can rotate relative to the mirror base 10; more specifically, the fine-tuning mechanisms 60 are fine-tuning screws. Internal threads are arranged at intervals on the outer periphery of the mirror base 10 at positions corresponding to the fine-tuning mechanisms 60, so that the internal threads are discontinuous, and external threads are arranged on the outer circumference of the screw-on ring 40. The screw-on ring 40 and the mirror base 10 are installed together by screwing the two threads together. The screw-on ring 40 is screwed into the mirror base 10, and the damping ring 50 arranged on the screw-on ring 40 is pressed, and the damping ring 50 is pressed against the outer shell 20, so that the outer shell 20 is tightly fitted on the guide surface of the mirror base 10.

[0035] By adjusting the screwing depth of the screw-in ring 40 on the lens holder 10, as well as the thread parameters of the screw-in ring 40 and the lens holder 10, the deformation of the damping ring 50 can be adjusted, thereby achieving adjustable damping of the loading on the housing 20; the screw-in ring 40 adopts a spindle-shaped structure, and a flexible groove 42 is provided in the middle, which can achieve self-adjustment through the part of the flexible groove 42 during the process of applying pressure to the damping ring 50, so that the pressure on the damping ring 50 is more uniform.

[0036] When the screw-on ring 40 is screwed into a predetermined position, the damping ring 50 and the housing 20 are in a pressed state, and the relative positions of the screw-on ring 40, the damping ring 50 and the mirror base 10 are fixed; at this time, the fine-tuning mechanism 60 (fine-tuning screw) is rotated to make the fine-tuning mechanism 60 move relative to the mirror base 10, and the inner end of the housing 20 is abutted against the housing 20 to drive the housing 20 to move relative to the mirror base 10 and slide along the guide surface.

[0037] During the whole process, the offset of the lens 30 is adjusted; by loading different damping, the resolution is adjusted to be more refined.

[0038] More specifically, the inner end of the fine-tuning mechanism 60 (fine-tuning screw) abuts against the housing 20, the outer periphery of the screw-in ring 40 has an external thread, and the lens holder 10 has an internal thread. By screwing the screw-in ring 40 onto the lens holder 10, the damping ring 50 is compressed, thereby applying a friction force to the housing 20. Figure 2 The pressure in the up-down direction makes the housing 20 fit closely on the guide surface of the lens holder 10, and the fine-tuning screw is adjusted to make the housing 20 slide on the guide surface of the lens holder 10; Figure 2 As shown, the housing 20 and the lens 30 can be moved in the horizontal direction.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A high-precision lens positioner, characterized in that: The invention comprises a lens base, a housing, a lens, a screw-on ring, a damping ring and a fine-tuning mechanism, wherein the screw-on ring is screwed to the lens base, the damping ring is arranged on the screw-on ring, the lens base is provided with a guide surface, the housing is slidably mounted on the guide surface, and the lens is mounted in the housing; the damping ring abuts against a side of the housing away from the guide surface, and the pressure applied by the damping ring on the housing can be adjusted by adjusting the screw-on depth between the screw-on ring and the lens base; the fine-tuning mechanism is mounted on the lens base, and the fine-tuning mechanism is used to drive the housing to slide on the guide surface; The rotating ring and the damping ring are both flexible structures. The rotating ring is a spindle-shaped structure and is provided with a flexible groove. Through the cooperation of the rotating ring and the damping ring, the friction between the outer shell and the guide surface on the mirror base can be adjusted, thereby reducing or increasing the damping between the outer shell and the mirror base.

2. The high-precision lens positioner according to claim 1, characterized in that: The fine-tuning mechanism is a fine-tuning screw, which is threadedly connected to the mirror base, and the inner end of the fine-tuning screw abuts against the shell; rotating the fine-tuning screw can drive the shell to slide on the guide surface.

3. The high-precision lens positioner according to claim 2, characterized in that: The three fine-tuning screws are evenly distributed on the outer circumference of the lens base at an angle of 120° between each other.

4. The high-precision lens positioner according to claim 1, characterized in that: An annular groove is arranged on one side of the rotating ring close to the housing, and the damping ring is installed in the annular groove.

5. The high-precision lens positioner according to claim 1, characterized in that: The inner wall of the mirror base is provided with discontinuous internal threads, the screw-on ring is provided with external threads, and the screw-on ring and the mirror base are screwed together through the cooperation of the external threads and the internal threads.

6. The high-precision lens positioner according to claim 5, characterized in that: The fine-tuning mechanism is a fine-tuning screw, which includes three fine-tuning screws that are evenly distributed on the outer circumference of the lens base at an angle of 120° to each other, and the internal thread is located at a position on the lens base corresponding to the fine-tuning screw.

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