A precision adjustment device for adjusting the posture of special-shaped lenses

Abstract

The present invention relates to the field of lens posture adjustment technology, specifically a precision adjustment device for adjusting the posture of special-shaped lenses, comprising a position adjustment platform and a lens loading head, wherein an angle adjustment mechanism is provided between the position adjustment platform and the lens loading head, and the angle adjustment mechanism has two states, namely, adjustment mode 1 and adjustment mode 2. In the present invention, the elastic structure and three nonlinearly arranged top support heads constitute a three-top and three-pull angle adjustment system, which can adjust the angle arbitrarily in three-dimensional space without the need for a complex drive control system, and is convenient for manually and flexibly adjusting the angle of the lens. The angle adjustment system has two adjustment modes, one for adjusting the angle arbitrarily, and the other for quickly adjusting the angle around the X-axis and around the Y-axis to meet different angle adjustment requirements. The switching between the two modes only requires constraining or releasing the movement of the horizontal reference axis and the longitudinal reference axis in the corresponding directions through the connector, which is very convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of lens posture adjustment, in particular to a precision adjustment device for adjusting the posture of special-shaped lenses. Background Art

[0002] In optical systems, lens position (translation) and orientation (rotation) are key parameters that determine system performance. Their importance extends from basic imaging to advanced fields like precision laser processing and space exploration, directly influencing light propagation paths, image quality, power distribution, and even the realization of system functions.

[0003] Existing adjustment devices are either simple in structure, relying on single-direction adjustment and unable to provide multi-directional adjustment; or they are complex in structure. While they can achieve multi-directional adjustment, they require complex control systems and cannot efficiently meet simple angle adjustment requirements. For example, for conventional standard lenses (such as spherical and flat mirrors), more than 90% of adjustments require only quick adjustments around the X-axis (pitch angle) and Y-axis (tilt angle) to achieve optical path alignment or focus calibration. However, adjustment devices that can adjust in any direction struggle to quickly and efficiently achieve these angle adjustments. Furthermore, due to their asymmetric shapes, special-shaped lenses (such as free-form and polygonal lenses) require simultaneous control of all six degrees of freedom (X, Y, and Z translation and pitch / tilt around the X / Y axes), especially requiring rotation around the Z axis (horizontal rotation angle) to compensate for mounting stress and optical distortion. However, simple adjustment devices cannot meet these adjustment requirements. Therefore, there is an urgent need for an adjustment device with a simple structure that can meet diverse adjustment requirements. Summary of the Invention

[0004] The present invention provides a precision adjustment device for adjusting the position of special-shaped lenses, comprising a position adjustment platform and a lens loading head, wherein an angle adjustment mechanism is provided between the position adjustment platform and the lens loading head, and the angle adjustment mechanism has two states: adjustment mode 1 and adjustment mode 2; the angle adjustment mechanism comprises: a fixed seat mounted on the position adjustment platform; an adjustment seat for mounting the lens loading head; a plurality of elastic structures connected between the fixed seat and the adjustment seat for providing an elastic force for pressing the adjustment seat toward the top support head; three non-collinearly arranged top support heads, the top support heads being telescopic structures and mounted on the fixed seat, the top support heads The end rests on the adjustment seat; the transverse reference axis and the longitudinal reference axis are both rotatably mounted on the adjustment seat; a connecting head; the connecting head includes: a longitudinal limit member, which only constrains the movement of the transverse reference axis in the longitudinal direction; a transverse limit member, which only constrains the movement of the longitudinal reference axis in the transverse direction; a control member, which is mounted on the fixed seat and is used to control the longitudinal limit member and the transverse limit member; the longitudinal limit member constrains the movement of the transverse reference axis, and when the transverse limit member constrains the movement of the longitudinal reference axis, the angle adjustment mechanism is in adjustment mode one; when the constraints on the transverse reference axis and the longitudinal reference axis are released, the angle adjustment mechanism is in adjustment mode two.

[0005] In one possible implementation, the longitudinal limit member and the transverse limit member are both plug-in plates, and slots are provided on the transverse reference axis and the longitudinal reference axis. The control member controls the plug-in plates to move downward and insert them into the corresponding slots. At this time, the movement of the transverse reference axis and the longitudinal reference axis is constrained.

[0006] In a possible implementation, a counterweight is provided at the lower end of each of the transverse reference axis and the longitudinal reference axis, and the counterweight ensures that the opening of the slot is always facing upward.

[0007] In one possible implementation, the control member includes a control screw and a connecting structure, the longitudinal limit member and the transverse limit member are fixedly connected to the connecting structure, and the connecting structure is threadedly connected to the control screw and slidably connected to the fixing seat.

[0008] In a possible implementation, a V-shaped groove is provided on the adjustment seat, the contact end between the supporting head and the adjustment seat is located in the V-shaped groove, and the contact end of the supporting head is spherical.

[0009] In a possible implementation, the elastic structure includes a spring and two connecting shafts, the connecting shafts are respectively provided at both ends of the spring, and the ends of the spring are sleeved on the corresponding connecting shafts.

[0010] In a possible implementation, the supporting head includes a push rod and a threaded sleeve, the threaded sleeve is fixedly mounted on a fixing seat and is threadedly connected to the push rod, and the push rod passes through the fixing seat from top to bottom.

[0011] In one possible implementation, the lens loading head includes: an adapter plate, fixedly mounted on the adjustment seat and provided with a waist-shaped mounting hole; and a lens frame, detachably fixedly mounted on the adapter plate and used for mounting lenses.

[0012] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: the embodiments of the present invention provide a precision adjustment device for adjusting the position of special-shaped lenses, the elastic structure and three nonlinearly arranged top support heads constitute a three-top and three-pull angle adjustment system, which can adjust the angle arbitrarily in three-dimensional space without the need for a complex drive control system, and is convenient for manual and flexible adjustment of the angle of the lens. The angle adjustment system has two adjustment modes, one is that the angle can be adjusted arbitrarily, and the other is to quickly adjust the angle around the X-axis and around the Y-axis to meet different angle adjustment requirements. Switching between the two modes only requires constraining or releasing the movement of the horizontal reference axis and the longitudinal reference axis in the corresponding direction through the connecting head, which is very convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1The figure is a schematic diagram of the overall structure of a precision adjustment device for adjusting the posture of special-shaped lenses provided by an embodiment of the present invention.

[0014] Figure 2 The diagram is a partial structural diagram of a precision adjustment device for adjusting the posture of special-shaped lenses provided by an embodiment of the present invention.

[0015] Figure 3 The present invention provides a schematic structural diagram of a push rod, a threaded sleeve, a spring, a transverse reference axis and a longitudinal reference axis of a precision adjustment device for adjusting the posture of a special-shaped lens provided by an embodiment of the present invention.

[0016] Figure 4 The present invention provides a schematic structural diagram of a longitudinal reference axis and a slot of a precision adjustment device for adjusting the posture of a special-shaped lens provided by an embodiment of the present invention.

[0017] In the figure: 1. Position adjustment platform; 101. Dual-axis precision translation stage; 102. Z-axis vertical lifting platform; 2. Lens loading head; 21. Adapter plate; 22. Frame; 3. Fixed seat; 4. Adjustment seat; 5. Elastic structure; 51. Spring; 52. Connecting shaft; 6. Support head; 61. Push rod; 62. Threaded sleeve; 7. Horizontal reference axis; 8. Longitudinal reference axis; 9. Connecting head; 91. Longitudinal limiter; 92. Horizontal limiter; 93. Control member; 931. Control screw; 932. Connecting structure; 94. Slot; 95. Counterweight; 10. V-groove. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described below, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] See also Figure 1A precision adjustment device for adjusting the position of special-shaped lenses comprises a position adjustment platform 1 and a lens loading head 2. An angle adjustment mechanism is provided between the position adjustment platform 1 and the lens loading head 2. The angle adjustment mechanism has two states: adjustment mode 1 and adjustment mode 2. In the state of adjustment mode 1, the angle adjustment mechanism can quickly and accurately adjust the angle around the X axis and the Y axis to efficiently meet the rapid angle adjustment requirements of conventional standard lenses. In the state of adjustment mode 2, the angle adjustment mechanism can adjust the angle around the X axis, the Y axis and the Z axis to fully meet the angle adjustment requirements of special-shaped lenses. Of course, the angle of the conventional standard lens can also be adjusted in adjustment mode 2 or the angle of the special-shaped lens can be adjusted in adjustment mode 1 according to the needs. The present invention can select the corresponding mode according to different needs. On the basis of meeting the angle adjustment requirements, the speed and convenience of angle adjustment are fully improved. Among them, the position adjustment platform 1 includes a dual-axis precision translation stage 101 and a Z-axis vertical lifting platform 102. The dual-axis precision translation stage 101 adopts two mutually perpendicular tight linear guides and a stepper motor (or servo motor). The motor controls the slider on the tight linear guide to perform precise linear motion through a tight gear pair or direct drive to achieve the translation of the lens loading head 2 on the X-axis and Y-axis. The Z-axis vertical lifting platform 102 consists of a vertically mounted precision screw and nut. The precision screw is driven manually or by a motor to achieve precise lifting and lowering of the lens loading head 2 in the vertical direction to meet the requirements of different work distances and optical systems. The lens can be detachably mounted on the lens loading head 2.

[0020] See Figure 1 、 Figure 2 and Figure 3 The angle adjustment mechanism includes a fixed seat 3 and an adjusting seat 4. The fixed seat 3 is fixedly mounted on the dual-axis precision translation stage 101. The adjusting seat 4 is located below the fixed seat 3 and is provided with a number of elastic structures 5 between the fixed seat 3. The lens loading head 2 is fixedly mounted on the adjusting seat 4. Three retractable non-collinear top support heads 6 are arranged on the fixed seat 3, and the lower ends of the top support heads 6 rest on the adjusting seat 4; the three top support heads 6 are distributed in a triangular shape, and the number of elastic structures 5 is three and they are also distributed in a triangular shape. The top support heads 6 and the elastic structures 5 constitute a three-top and three-pull angle adjustment structural system. The elastic structure 5 provides an elastic force that presses the adjusting seat 4 upward toward the top support heads 6. By adjusting the downward support distance of each top support head 6, the adjustment seat 4 can be adjusted to any angle in three-dimensional space, and then the lens loading head 2 can be adjusted to any angle without a complex drive control system, and only manual real-time adjustment is required. Among them, the lens loading head 2 includes an adapter plate 21 and a frame 22. The adapter plate 21 is provided with a waist-shaped hole for adapting to lenses of different shapes and sizes. The adapter plate 21 is fixedly installed on the adjustment seat 4, and the frame 22 is fixedly connected to the adapter plate 21 by bolts or clamps. For different lenses, you only need to replace different frames 22.

[0021] See Figure 1 、 Figure 2 and Figure 3 The angle adjustment mechanism also includes a transverse reference axis 7, a longitudinal reference axis 8 and a connector 9. The transverse reference axis 7 and the longitudinal reference axis 8 are both horizontally rotatably mounted on the adjustment seat 4, and the two are perpendicular to each other. The connector 9 includes a longitudinal limiter 91 that only constrains the movement of the transverse reference axis 7 in the longitudinal direction, a transverse limiter 92 that only constrains the movement of the longitudinal reference axis 8 in the transverse direction, and a control member 93 that is mounted on the fixed seat 3 and is used to control the longitudinal limiter 91 and the transverse limiter 92. When the control member 93 controls the longitudinal limiter 91 to constrain the movement of the transverse reference axis 7 and controls the transverse limiter 92 to constrain the movement of the longitudinal reference axis 8, , the angle adjustment mechanism is in adjustment mode 1. In this mode, the transverse reference axis 7 is in a fixed position in the longitudinal direction, and the longitudinal reference axis 8 is in a fixed position in the transverse direction. By adjusting the downward supporting distance of the supporting head 6, the adjustment seat 4 can be quickly rotated around the X-axis or around the Y-axis to adjust the angle. When the control member 93 controls the longitudinal limit member 91 to release the constraint on the transverse reference axis 7 and controls the transverse limit member 92 to release the constraint on the longitudinal reference axis 8, the angle adjustment mechanism is in adjustment mode 2. In this mode, by adjusting the downward supporting distance of each supporting head 6, any angle adjustment can be achieved in three-dimensional space.

[0022] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the longitudinal limit member 91 and the transverse limit member 92 are both plug-in plates, and slots 94 are provided on the transverse reference axis 7 and the longitudinal reference axis 8. The control member 93 only needs to control the plug-in plate to move downward, so that the plug-in plate is inserted into the corresponding slot 94 and locked, and the movement of the transverse reference axis 7 and the longitudinal reference axis 8 can be constrained in the corresponding direction, so that the angle adjustment mechanism enters the adjustment mode one state. When the control member 93 controls the plug-in plate to move up and separate from the slot 94, the constraint on the transverse reference axis 7 and the longitudinal reference axis 8 can be released, so that the angle adjustment mechanism enters the adjustment mode two state. The entire mode switching process is convenient and fast. Among them, the lower ends of the transverse reference axis 7 and the longitudinal reference axis 8 are both provided with counterweight blocks 95. Under the action of the counterweight blocks 95, the slots 94 on the transverse reference axis 7 and the longitudinal reference axis 8 are always open upward, which is convenient for the plug-in plate to be quickly inserted into the corresponding slot 94, further improving the convenience and speed of the mode switching process. A trumpet-shaped guide area is provided at the top end of the slot 94 to further facilitate the rapid insertion of the plug-in plate.

[0023] See Figure 1 、 Figure 2 and Figure 3The control member 93 includes a control screw 931 and a connecting structure 932. The longitudinal limit member 91 and the transverse limit member 92 are fixedly connected to the connecting structure 932. The connecting structure 932 is threadedly connected to the control screw 931 and is slidably connected to the fixing seat 3; Figure 2 As shown, the control screw 931 passes through the connecting structure 932 and is rotatably connected to the fixed seat 3; the connecting structure 932 includes two connecting rods and a sliding block, and the two connecting rods are fixedly connected between the longitudinal limit member 91 and the sliding block and between the transverse limit member 92 and the sliding block, and the connecting rod slides through the fixed seat 3, and the sliding block is threadedly connected to the control screw 931 and slidably connected to the fixed seat 3. By rotating the control screw 931, the lifting and lowering of the longitudinal limit member 91 and the transverse limit member 92 can be synchronously controlled through the connecting structure 932, and the longitudinal limit member 91 and the transverse limit member 92 can also be locked in the current position in real time, which is very convenient for switching the angle adjustment mode.

[0024] See Figure 1 、 Figure 2 and Figure 3 The supporting head 6 includes a push rod 61 and a threaded sleeve 62. The threaded sleeve 62 is fixedly installed on the fixing seat 3 and is threadedly connected to the push rod 61. The push rod 61 passes through the fixing seat 3 up and down. A contact ball is rotatably installed at the lower end of the push rod 61. The push rod 61 can be rotated to make it rise and fall to adjust the supporting distance of the supporting head 6.

[0025] See Figure 2 and Figure 3 A V-shaped groove 10 is provided on the adjustment seat 4. The V-shaped groove 10 corresponds to the push rod 61 one by one and is distributed in a triangular shape. The lower end of the push rod 61 is located in the corresponding V-shaped groove 10, and the contact ball forms a spherical contact area at the lower end of the support head 6. During the angle adjustment process, the lower end of the push rod 61 is always located in the corresponding V-shaped groove 10. The push rod 61 is limited by the V-shaped groove 10, thereby improving the stability of the angle adjustment on the basis of the angle adjustment.

[0026] See Figure 1 、 Figure 2 and Figure 3 The elastic structure 5 includes a spring 51 and two connecting shafts 52, and the connecting shafts 52 are respectively arranged at the upper and lower ends of the spring 51. Among them, the connecting shaft 52 at the upper end of the spring 51 is fixedly mounted on the fixing seat 3, and the connecting shaft 52 at the lower end of the spring 51 is fixedly mounted on the adjusting seat 4, and the end of the spring 51 is sleeved on the corresponding connecting shaft 52.

[0027] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0028] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, integral or sliding connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A precision adjustment device for adjusting the position of special-shaped lenses, comprising a position adjustment platform and a lens loading head, characterized in that: An angle adjustment mechanism is provided between the position adjustment platform and the lens loading head. The angle adjustment mechanism has two states: adjustment mode 1 and adjustment mode 2. The angle adjustment mechanism includes: Fixed seat, installed on the position adjustment platform; Adjustment seat, used for installing the lens loading head; A plurality of elastic structures are connected between the fixed seat and the adjustment seat, and are used to provide an elastic force to press the adjustment seat toward the top support head; Three non-collinearly arranged top support heads, each of which is a telescopic structure and is mounted on a fixed seat, with the ends of the top support heads resting against the adjustment seat; The transverse reference axis and the longitudinal reference axis are both rotatably mounted on the adjustment seat; Connector; Connectors include: The longitudinal limiter only constrains the movement of the transverse reference axis in the longitudinal direction; The transverse limiter only constrains the movement of the longitudinal reference axis in the transverse direction; A control member, mounted on the fixing seat and used to control the longitudinal limit member and the transverse limit member; The longitudinal limiter constrains the movement of the transverse reference axis. When the transverse limiter constrains the movement of the longitudinal reference axis, the angle adjustment mechanism is in adjustment mode one; when the constraints on the transverse reference axis and the longitudinal reference axis are released, the angle adjustment mechanism is in adjustment mode two.

2. The precision adjustment device for adjusting the posture of special-shaped lenses according to claim 1, characterized in that: The longitudinal limiter and the transverse limiter are both plug-ins, and slots are provided on the transverse reference axis and the longitudinal reference axis. The control member controls the plug-ins to move downward and insert them into the corresponding slots. At this time, the movement of the transverse reference axis and the longitudinal reference axis is constrained.

3. The precision adjustment device for adjusting the posture of special-shaped lenses according to claim 2, characterized in that: The lower ends of the transverse reference axis and the longitudinal reference axis are both provided with counterweight blocks, and the counterweight blocks ensure that the opening of the slot is always facing upwards.

4. A precision adjustment device for adjusting the position of a special-shaped lens according to any one of claims 2 or 3, characterized in that: The control member includes a control screw and a connecting structure. The longitudinal limit member and the transverse limit member are fixedly connected to the connecting structure. The connecting structure is threadedly connected to the control screw and slidably connected to the fixing seat.

5. The precision adjustment device for adjusting the posture of special-shaped lenses according to claim 1, characterized in that: The adjustment seat is provided with a V-shaped groove, the contact end of the top support head and the adjustment seat is located in the V-shaped groove, and the contact end of the top support head is spherical.

6. The precision adjustment device for adjusting the posture of special-shaped lenses according to claim 1, characterized in that: The elastic structure includes a spring and two connecting shafts. The connecting shafts are respectively arranged at both ends of the spring, and the ends of the spring are sleeved on the corresponding connecting shafts.

7. The precision adjustment device for adjusting the posture of special-shaped lenses according to claim 1, characterized in that: The supporting head includes a push rod and a threaded sleeve. The threaded sleeve is fixedly mounted on a fixing seat and is threadedly connected to the push rod. The push rod passes through the fixing seat from top to bottom.

8. The precision adjustment device for adjusting the position of special-shaped lenses according to claim 1, characterized in that: The lens loading head comprises: The adapter plate is fixedly mounted on the adjustment seat and is provided with a waist-shaped mounting hole; The frame is detachably fixed on the adapter plate and is used to install lenses.

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