Optical machine and micro-displacement adjusting device thereof

Abstract

This invention discloses an optical engine, including a micro-displacement adjustment device, an optical engine lens, an optical engine light source, a lens fixing block, and an optical engine fixing block. The micro-displacement adjustment device includes a first substrate portion, a second substrate portion, a third substrate portion, a first elastic component, a first telescopic component, a second elastic component, and a second telescopic component. An opening is provided in the middle of the third substrate portion, which is fixedly connected to the optical engine lens, thereby enabling the optical engine lens to move accordingly. The micro-displacement adjustment device is connected to the optical engine lens via the lens fixing block and is configured to drive the optical engine lens to move. The optical engine lens is connected to the optical engine light source via the optical engine fixing block. This optical engine has a simple structure, low cost, and easy installation, and can achieve two-dimensional micro-displacement of the optical engine lens, thereby causing translation of the projected image and improving the surface finish of the 3D printed model.

Description

Technical Field

[0001] This invention relates to the field of precision mechanical displacement drive, and more particularly to an optomechanic and its micro-displacement adjustment device. Background Technology

[0002] The basic principle of DLP (Digital Light Processing) 3D printing technology is that a digital light source projects onto the surface of liquid photosensitive resin layer by layer in the form of surface light, and then solidifies and forms the final product. DLP has unique advantages over other types of 3D printing technologies, enabling the manufacture of more intricate parts, such as jewelry and dental molds. Improving printing accuracy and surface finish quality is one of the hot research topics in the industry.

[0003] For example, when a DLP device uses a 1K95 optical engine (1920×1080), the pixels are too large, resulting in discontinuous surface connections on the printed model. The finished model has an uneven surface and cannot be used directly, requiring a polishing process before it can be used. One approach to address this technical problem is through a micro-displacement between the optical engine lens and the optical engine light source.

[0004] Regarding micro-displacement adjustment, some solutions currently available in the industry are mainly aimed at the machining industry. These devices have complex structures, many components, and high costs, and cannot be matched with optical-mechanical lenses, making them unsuitable for micro-displacement adjustment of optical-mechanical lenses.

[0005] Therefore, those skilled in the art are dedicated to developing a micro-displacement adjustment device suitable for optical-mechanical lenses and 3D printing. Summary of the Invention

[0006] Currently, there is no low-cost solution in the industry for DLP 3D printed models with wavy surfaces and poor surface finish. Improving the surface finish of a 1K optical engine at low cost without replacing the optical engine is a pressing issue. A key technical challenge lies in achieving two-dimensional micro-displacement between the optical engine lens and the optical engine light source. Through long-term observation and experimentation, the inventors discovered that micro-displacement of the optical engine lens in a two-dimensional direction can effectively improve the surface finish of the printed model.

[0007] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is how to achieve micro-displacement of the optical-mechanical lens at low cost in order to improve printing accuracy and surface finish.

[0008] To achieve the above objectives, the present invention provides a micro-displacement adjustment device, comprising a first substrate portion, a second substrate portion, a first extendable component, and a displacement recovery component;

[0009] The second substrate portion has a frame structure; the first substrate portion is disposed around the outside of the second substrate portion, and both the first substrate portion and the second substrate portion are symmetrical with respect to the first axis;

[0010] The first retractable component is disposed between the first substrate portion and the second substrate portion and is configured to extend and retract along the direction of the first axis, thereby causing the second substrate portion to move back and forth relative to the first substrate portion along the direction of the first axis.

[0011] The displacement recovery component is disposed at the other end opposite to the first retractable component between the first substrate portion and the second substrate portion, and is configured to provide a restoring force to the second substrate portion when the first retractable component causes the second substrate portion to move relative to the first substrate portion. The direction of the restoring force is opposite to the direction of the force applied by the first retractable component to the second substrate portion.

[0012] Furthermore, the displacement recovery component is further configured such that when the first telescopic component extends, the displacement recovery component shortens accordingly, and when the first telescopic component shortens, the displacement recovery component extends accordingly.

[0013] Furthermore, the displacement recovery component includes a first elastic component;

[0014] The first substrate portion is provided with a first elastic component receiving space and a first retractable component receiving space opposite to each other on both sides of the second axis. The shapes of the first elastic component receiving space and the first retractable component receiving space are both set to be symmetrical with respect to the first axis.

[0015] The second axis is perpendicular to the first axis;

[0016] A first gap space symmetrical with respect to the first axis is provided between the first substrate portion and the second substrate portion; a first sheet-like substrate portion is formed between the first elastic member receiving space and the first gap space, and a first sheet-like substrate portion is formed between the first stretchable member receiving space and the first gap space, and the first sheet-like substrate portion is configured to be symmetrical with respect to the first axis.

[0017] The first retractable component is disposed within the first retractable component accommodating space;

[0018] The first elastic member is disposed within the first elastic member receiving space and is configured to provide an elastic force in the direction along the first axis.

[0019] Furthermore, the first elastic component includes a spring.

[0020] Furthermore, the first stretchable component includes a piezoelectric ceramic that is configured to stretch or contract accordingly based on the received voltage.

[0021] Furthermore, the first substrate portion and the second substrate portion are made of an elastic alloy.

[0022] Furthermore, the elastic alloy is spring steel 65Mn.

[0023] Furthermore, the first thin-film substrate portion is formed in one step using a slow wire cutting process.

[0024] Furthermore, the first retractable component includes a magnetostrictive rod, which is configured to extend or retract accordingly based on a received alternating magnetic field signal.

[0025] Furthermore, it also includes a third substrate portion and a second retractable component;

[0026] The third substrate portion has a frame structure; the second substrate portion is disposed around the outside of the third substrate portion, and both the second substrate portion and the third substrate portion are symmetrical with respect to the second axis;

[0027] The second substrate portion is provided with a second elastic component receiving space and a second retractable component receiving space opposite to each other on both sides of the first axis. The shapes of the second elastic component receiving space and the second retractable component receiving space are both set to be symmetrical with respect to the second axis.

[0028] A second gap space symmetrical with respect to the second axis is provided between the second substrate portion and the third substrate portion; a second sheet-like substrate portion is formed between the second elastic member receiving space and the second gap space, and a second sheet-like substrate portion is formed between the second stretchable member receiving space and the second gap space, the second sheet-like substrate portion being symmetrical with respect to the second axis;

[0029] The second retractable component is disposed within the second retractable component receiving space and is configured to extend and retract along the direction of the second axis, thereby causing the third substrate portion to move back and forth relative to the second substrate portion along the direction of the second axis;

[0030] The two sides of the second elastic member within the receiving space along the second axis are elastically connected, thereby enabling an elastic restoring force to be provided when the third substrate portion is displaced relative to the second substrate portion.

[0031] Furthermore, it also includes a second elastic member disposed within a second elastic member receiving space and configured to provide an elastic force in the direction along the second axis.

[0032] Furthermore, the second elastic component includes a spring.

[0033] Furthermore, the second retractable component includes a piezoelectric ceramic configured to expand or contract accordingly based on the received voltage.

[0034] Furthermore, the third substrate portion is made of an elastic alloy.

[0035] Furthermore, the elastic alloy is spring steel 65Mn.

[0036] Furthermore, the second sheet-like substrate portion is formed in one step using a slow wire cutting process.

[0037] Furthermore, the second retractable component includes a magnetostrictive rod configured to extend or retract in response to a received alternating magnetic field signal.

[0038] The present invention also provides an optical engine, including a micro-displacement adjustment device, a lens fixing block, an optical engine fixing block, an optical engine lens, and an optical engine light source;

[0039] The micro-displacement adjustment device includes a first substrate portion, a second substrate portion, a third substrate portion, a first retractable component, a second retractable component, a first elastic component, and a second elastic component.

[0040] The first substrate portion is disposed around the outside of the second substrate portion, and both the first substrate portion and the second substrate portion are symmetrical with respect to the first axis; the second substrate portion is disposed around the outside of the third substrate portion, and both the second substrate portion and the third substrate portion are symmetrical with respect to the second axis;

[0041] The second axis is perpendicular to the first axis;

[0042] The first retractable component is disposed between the first substrate portion and the second substrate portion and is configured to extend and retract along the direction of the first axis, thereby causing the second substrate portion to move back and forth relative to the first substrate portion along the direction of the first axis.

[0043] The second retractable member is disposed between the second substrate portion and the third substrate portion and is configured to extend and retract along the direction of the second axis, thereby causing the third substrate portion to move back and forth relative to the second substrate portion along the direction of the second axis;

[0044] The first elastic member is disposed at the other end opposite to the first retractable member between the first substrate portion and the second substrate portion, and is configured to provide a first restoring force to the second substrate portion when the first retractable member causes the second substrate portion to move relative to the first substrate portion. The direction of the first restoring force is opposite to the direction of the force applied by the first retractable member to the second substrate portion.

[0045] The second elastic member is disposed at the other end opposite to the second retractable member between the second substrate portion and the third substrate portion, and is configured to provide a second restoring force to the third substrate portion when the second retractable member causes the third substrate portion to move relative to the second substrate portion. The direction of the second restoring force is opposite to the direction of the force applied by the second retractable member to the third substrate portion.

[0046] The third substrate portion has an opening in the middle for fixed connection with the optical-mechanical lens, thereby enabling the optical-mechanical lens to move accordingly.

[0047] The micro-displacement adjustment device is connected to the optical engine lens via the lens fixing block and is configured to drive the optical engine lens to move.

[0048] The optical engine lens is connected to the optical engine light source via the optical engine fixing block.

[0049] Furthermore, the first substrate portion is provided with a first elastic component receiving space and a first retractable component receiving space opposite to each other on both sides of the second axis, and the shapes of the first elastic component receiving space and the first retractable component receiving space are both set to be symmetrical with respect to the first axis.

[0050] The second substrate portion is provided with a second elastic component receiving space and a second retractable component receiving space opposite to each other on both sides of the first axis. The shapes of the second elastic component receiving space and the second retractable component receiving space are both set to be symmetrical with respect to the second axis.

[0051] A first gap space symmetrical with respect to the first axis is provided between the first substrate portion and the second substrate portion; a first sheet-like substrate portion is formed between the first elastic member receiving space and the first gap space, and a first sheet-like substrate portion is formed between the first stretchable member receiving space and the first gap space, and the first sheet-like substrate portion is configured to be symmetrical with respect to the first axis.

[0052] A second gap space symmetrical with respect to the second axis is provided between the second substrate portion and the third substrate portion; a second sheet-like substrate portion is formed between the second elastic member receiving space and the second gap space, and a second sheet-like substrate portion is formed between the second stretchable member receiving space and the second gap space, the second sheet-like substrate portion being symmetrical with respect to the second axis;

[0053] The first retractable component is disposed within the first retractable component receiving space and is configured to extend and retract along the direction of the first axis, thereby causing the second substrate portion to move back and forth relative to the first substrate portion along the direction of the first axis.

[0054] The second retractable component is disposed within the second retractable component receiving space and is configured to extend and retract along the direction of the second axis, thereby causing the third substrate portion to move back and forth relative to the second substrate portion along the direction of the second axis;

[0055] The first elastic member is disposed within the first elastic member receiving space and is configured to provide an elastic force in the direction along the first axis;

[0056] The second elastic member is disposed within the second elastic member receiving space and is configured to provide an elastic force in the direction along the second axis.

[0057] Furthermore, the first retractable component includes a piezoelectric ceramic, and the second retractable component includes a piezoelectric ceramic, the piezoelectric ceramic being configured to expand and contract accordingly based on the received voltage; the first elastic component and the second elastic component include springs;

[0058] Positioning beads are mounted on the optical engine fixing block. A boss is provided at the bottom of the optical engine fixing block. The height of the boss is greater than the thickness of the connecting flange between the bottom of the optical engine lens and the optical engine light source, so that a gap is left between the bottom of the optical engine lens and the optical engine light source. The height of the gap is less than the height of the positioning beads, so that the positioning beads are set to interference fit, thereby using the elasticity of the positioning beads to press the optical engine lens tightly against the optical engine light source.

[0059] Furthermore, the first substrate portion, the second substrate portion, and the third substrate portion are made of an elastic alloy.

[0060] Furthermore, the elastic alloy is spring steel 65Mn.

[0061] Furthermore, the first sheet-like substrate portion and the second sheet-like substrate portion are formed in one step using a slow wire cutting process.

[0062] Furthermore, the first retractable component and the second retractable component include magnetostrictive rods, which are configured to extend or retract in response to received alternating magnetic field signals.

[0063] Compared with existing technical solutions, the beneficial technical effects of the present invention are that the micro-displacement adjustment device has a simple structure, low cost, and easy installation. It can achieve nanometer-level micro-displacement adjustment and can be used to drive the optical engine lens or optical engine light source to make two-dimensional micro-displacement, so that a relative micro-displacement is formed between the optical engine lens and the optical engine light source, thereby helping to improve printing accuracy.

[0064] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0065] Figure 1 This is a schematic plan view of the composition structure of the first embodiment of the present invention;

[0066] Figure 2 This is a perspective view of the first embodiment of the present invention;

[0067] Figure 3 This is a schematic plan view of the composition structure of the second embodiment of the present invention;

[0068] Figure 4 This is a schematic diagram of the assembly of the micro-displacement adjustment device and the optomechanic according to the fourth embodiment of the present invention;

[0069] Figure 5 This is another schematic diagram of the micro-displacement adjustment device and optomechanical assembly according to the fourth embodiment of the present invention;

[0070] Figure 6 This is a top view of the micro-displacement adjustment device and optomechanical assembly according to the fourth embodiment of the present invention;

[0071] Figure 7 This is a partial detailed schematic diagram of the micro-displacement adjustment device and optomechanical assembly according to the fourth embodiment of the present invention.

[0072] Wherein, 1-first substrate portion, 2-second substrate portion, 3-third substrate portion, 41-first sheet-like substrate portion, 42-second sheet-like substrate portion, 151-first elastic component accommodating space, 161-first telescopic component accommodating space, 252-second elastic component accommodating space, 262-second telescopic component accommodating space, 12-first gap space, 23-second gap space, 51-first elastic component, 61-first telescopic component, 52-second elastic component, 62-second telescopic component, 8-first axis, 9-second axis, 100-micro-displacement adjustment device, 101-lens fixing block, 102-optical engine fixing block, 103-positioning bead, 104-connecting flange, 105-countersunk screw, 106-micro-gap, 1021-bore, 108-optical engine lens, 109-optical engine light source. Detailed Implementation

[0073] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0074] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0075] like Figure 1 and Figure 2 As shown, in the first embodiment of the present invention, a micro-displacement adjustment device includes a first substrate portion 1, a second substrate portion 2, a first elastic member 51, and a first retractable member 61. The first substrate portion 1 is disposed around the outside of the second substrate portion 2, and both the first substrate portion 1 and the second substrate portion 2 are symmetrical with respect to a first axis 8. A first gap space 12 symmetrical with respect to the first axis 8 is provided between the first substrate portion 1 and the second substrate portion 2. A first elastic member receiving space 151 and a first retractable member receiving space 161 opposite to each other on both sides of the second axis 9 are provided on the first substrate portion 1, and the shapes of both are set to be symmetrical with respect to the first axis 8. The second axis 9 is perpendicular to the first axis 8.

[0076] A first sheet-like substrate portion 41 is formed between the first elastic member receiving space 151 and the first gap space 12, and a first sheet-like substrate portion 41 is formed between the first stretchable member receiving space 161 and the first gap space 12. The first sheet-like substrate portion 41 is configured to be symmetrical with respect to the first axis 8.

[0077] In this embodiment, the first elastic component 51 is a spring, with its two ends connected to the two sides of the first elastic component receiving space 151 along the first axis 8, respectively. The first retractable component 61 is a piezoelectric ceramic, with its two ends contacting the two sides of the first retractable component receiving space 161 along the first axis 8, respectively. The spring can extend and retract along the direction of the first axis 8, thereby driving the second substrate portion 2 to move back and forth relative to the first substrate portion 1 along the direction of the first axis 8.

[0078] The micro-displacement adjustment device is made of spring steel 65Mn and is processed by slow wire cutting. This processing method can ensure extremely high precision, thereby ensuring that the thickness of the thin sheet substrate is uniform. When pushed, it can always move in a straight line along the direction of the first axis 8 without deflection due to uneven material thickness.

[0079] This micro-displacement adjustment device is based on piezoelectric ceramic drive, utilizing the positive piezoelectric effect of the piezoelectric ceramic sheet. When energized, the piezoelectric ceramic elongates, moving a distance on the nanometer scale. The spring's specifications are matched to the force applied to the piezoelectric ceramic and the distance it moves.

[0080] In this embodiment, the first retractable component 61 is a piezoelectric ceramic. When current is supplied to it, due to the positive piezoelectric effect, the piezoelectric ceramic will extend a certain distance, and its extension deformation is proportional to the magnitude of the applied voltage. Since this micro-displacement adjustment device is made of spring steel, the first sheet-like substrate portion 41 has good flexibility and is easily pushed. When the piezoelectric ceramic is energized and extends, it applies a force to the first sheet-like substrate portion 41, thereby pushing the entire frame structure formed by the second substrate portion 2, causing it to move along the direction of the first axis 8, and thus pressing the first elastic component 51 located on the opposite side. In this embodiment, this is to compress the spring. Through this working method, a small displacement can be generated by pushing the object located in the middle of the second substrate portion 2. When the power is turned off, the piezoelectric ceramic returns to its original length, the thrust disappears, the spring returns to its original state, and the entire frame structure formed by the second substrate portion 2 also returns to its original position. By controlling the magnitude of the applied voltage and current, the distance of the micro-displacement can be precisely controlled, thus achieving the purpose of micro-displacement adjustment along the direction of the first axis 8, realizing displacement adjustment in one dimension.

[0081] like Figure 3 As shown, in the second embodiment of the present invention, the micro-displacement adjustment device includes a first substrate portion 1, a second substrate portion 2, a third substrate portion 3, a first elastic member 51, a first stretchable member 61, a second elastic member 52, and a second stretchable member 62.

[0082] The first substrate portion 1 is disposed around the outside of the second substrate portion 2, and both the first substrate portion 1 and the second substrate portion 2 are symmetrical with respect to the first axis 8. The second substrate portion 2 is disposed around the outside of the third substrate portion 3, and both the second substrate portion 2 and the third substrate portion 3 are symmetrical with respect to the second axis 9.

[0083] The second axis 9 is perpendicular to the first axis 8.

[0084] A first gap space 12, symmetrical with respect to the first axis 8, is provided between the first substrate portion 1 and the second substrate portion 2. The first substrate portion 1 has a first elastic member receiving space 151 and a first retractable member receiving space 161, opposite to each other on both sides of the second axis 9, both of which are symmetrical with respect to the first axis 8. A second gap space 23, symmetrical with respect to the second axis 9, is provided between the second substrate portion 2 and the third substrate portion 3. The second substrate portion 2 has a second elastic member receiving space 252 and a second retractable member receiving space 262, opposite to each other on both sides of the first axis 8, both of which are symmetrical with respect to the second axis 9.

[0085] A first sheet-like substrate portion 41 is formed between the first elastic member receiving space 151 and the first gap space 12, and a first sheet-like substrate portion 41 is formed between the first telescopic member receiving space 161 and the first gap space 12. This first sheet-like substrate portion 41 is configured to be symmetrical with respect to the first axis 8. A second sheet-like substrate portion 42 is formed between the second elastic member receiving space 252 and the second gap space 23, and a second sheet-like substrate portion 42 is formed between the second telescopic member receiving space 262 and the second gap space 23. This second sheet-like substrate portion 42 is configured to be symmetrical with respect to the second axis 9.

[0086] In this embodiment, the first elastic member 51 is a spring, with its two ends connected to the two sides of the first elastic member receiving space 151 along the first axis 8, respectively. The first retractable member 61 is a piezoelectric ceramic, with its two ends contacting the two sides of the first retractable member receiving space 161 along the first axis 8, respectively. The first elastic member 51 can extend and retract along the direction of the first axis 8, thereby driving the second substrate portion 2 to move back and forth relative to the first substrate portion 1 along the direction of the first axis 8.

[0087] The second elastic member 52 is a spring, with its two ends connected to the two sides of the second elastic member receiving space 252 along the second axis 9, respectively. The second telescopic member 62 is a piezoelectric ceramic, with its two ends contacting the two sides of the second telescopic member receiving space 262 along the second axis 9, respectively. The second elastic member 52 can extend and retract along the direction of the second axis 9, thereby driving the third substrate portion 3 to move back and forth relative to the second substrate portion 2 along the direction of the second axis 9.

[0088] The micro-displacement adjustment device is made of spring steel Mn65 and is processed by slow wire cutting. This processing method can ensure extremely high precision, thereby ensuring that the thickness of the first and second thin sheet substrates remains uniform. When pushed, it can always move in a straight line along the first axis 8 or the second axis 9 without deflection due to uneven material thickness.

[0089] This micro-displacement adjustment device is based on piezoelectric ceramic drive, utilizing the positive piezoelectric effect of the piezoelectric ceramic sheet. When energized, the piezoelectric ceramic elongates, moving a distance on the nanometer scale. The spring's specifications are matched to the force applied to the piezoelectric ceramic and the distance it moves.

[0090] In this embodiment, the first retractable component 61 is a piezoelectric ceramic. When current is supplied to it, due to the positive piezoelectric effect, the piezoelectric ceramic will extend a certain distance, and its extension deformation is proportional to the magnitude of the applied voltage. Since this micro-displacement adjustment device is made of spring steel, the first sheet-like substrate portion 41 has good flexibility and is easily pushed. When the piezoelectric ceramic is energized and extends, it applies a force to the first sheet-like substrate portion 41, thereby pushing the entire frame structure formed by the second substrate portion 2, causing it to move along the direction of the first axis 8, and thus pressing the first elastic component 51 located on the opposite side. In this embodiment, this is to compress the spring. Through this working method, a small displacement can be generated by pushing the object located in the middle of the second substrate portion 2. When the power is turned off, the piezoelectric ceramic returns to its original length, the thrust disappears, the spring returns to its original state, and the entire frame structure formed by the second substrate portion 2 also returns to its original position. By controlling the magnitude of the applied voltage and current, the distance of the micro-displacement can be precisely controlled, thus achieving the purpose of micro-displacement adjustment along the direction of the first axis 8, realizing displacement adjustment in one dimension.

[0091] In this embodiment, the second retractable component 62 is a piezoelectric ceramic. When current is supplied to it, due to the positive piezoelectric effect, the piezoelectric ceramic will extend a certain distance, and its extension deformation is proportional to the magnitude of the applied voltage. Since this micro-displacement adjustment device is made of spring steel, the second sheet-like substrate portion 42 has good flexibility and is easily pushed. When the piezoelectric ceramic is energized and extends, it applies a force to the second sheet-like substrate portion 42, thereby pushing the entire frame structure formed by the third substrate portion 3, causing it to move along the direction of the second axis 9, and thus pressing the second elastic component 52 located on the opposite side. In this embodiment, this is to compress the spring. Through this working method, a small displacement can be generated by pushing the object located in the middle of the third substrate portion 3. When the power is turned off, the piezoelectric ceramic returns to its original length, the thrust disappears, the spring returns to its original state, and the entire frame structure formed by the third substrate portion 3 also returns to its original position. By controlling the magnitude of the applied voltage and current, the distance of the micro-displacement can be precisely controlled, thus achieving the purpose of micro-displacement adjustment along the direction of the second axis 9, realizing displacement adjustment in another dimension.

[0092] By alternately energizing the first retractable component 61 and the second retractable component 62 of the micro-displacement adjustment device, the frame structure formed by the second substrate part 2 can be moved along the first axis 8, or the frame structure formed by the third substrate part 3 can be moved along the second axis 9. These two directions of movement are perpendicular to each other, thus forming a two-dimensional micro-displacement adjustment in the horizontal and vertical directions.

[0093] In this embodiment, both the first elastic component receiving space 151 and the first retractable component receiving space 161 are symmetrical with respect to the first axis 8. This ensures that the force applied by the first retractable component 61 and the first elastic component 51 installed therein is always along the direction of the first axis 8, propelling the object stably forward along the first axis 8 without deviation due to uneven material thickness in some areas caused by material asymmetry. Similarly, both the second elastic component receiving space 252 and the second retractable component receiving space 262 are symmetrical with respect to the second axis 9. This ensures that the force applied by the second retractable component 62 and the second elastic component 52 installed therein is always along the direction of the second axis 9, propelling the object forward along the second axis 9 without deviation due to uneven material thickness in some areas caused by material asymmetry.

[0094] In this embodiment, this micro-displacement adjustment device can achieve the adjustment of minute displacements in two mutually perpendicular directions on a plane, and therefore can be applied to fields such as laser tuning, focusing, fine adjustment of optical instrument lenses, adjustment of precision machine tool tools, and adjustment of micro-motion platforms.

[0095] In a third embodiment of the invention, the first retractable component 61 and the second retractable component 62 can also be magnetostrictive rods. Since the length of a magnetostrictive material changes under the influence of a magnetic field, it can undergo displacement and do work. Therefore, when a magnetic field is applied to the first retractable component 61 and the second retractable component 62 respectively, similar to piezoelectric ceramics, they respectively push the frame structure formed by the second substrate portion 2 to move along the first axis 8, or push the frame structure formed by the third substrate portion 3 to move along the second axis 9, compressing the springs located on their opposite sides. These two directions of movement are perpendicular to each other, thus forming a two-dimensional micro-displacement adjustment in both the lateral and longitudinal directions.

[0096] In the fourth embodiment of the present invention, as Figure 4 , 5 As shown, an optomechanical system is used to improve the surface finish of a DLP printed model. It includes a micro-displacement adjustment device 100, a lens fixing block 101, an optomechanical fixing block 102, an optomechanical lens 108, and an optomechanical light source 109.

[0097] This micro-displacement adjustment device has a similar structure and working principle to the aforementioned embodiment. In this embodiment, the piezoelectric ceramic of the micro-displacement adjustment device is controlled by a voltage signal within the range of 0-150V. The deformation of the piezoelectric ceramic after being energized is directly proportional to the magnitude of the voltage signal. The maximum force on the piezoelectric ceramic is 230N, and the movement distance is in the nanometer range. The spring has an outer diameter of 8mm and a length of 10mm, and other specifications are adapted to the force and movement distance of the piezoelectric ceramic.

[0098] like Figure 6 As shown, when it is desired to move the optical engine lens in the X direction, a suitable voltage is applied to the first piezoelectric ceramic sheet 1061. The piezoelectric ceramic sheet elongates due to the current, reaching a nanometer-scale distance. The specifications of the first spring 1051 on the opposite side are adapted to the force and movement distance of the piezoelectric ceramic sheet, and thus it is compressed accordingly, thereby causing the optical engine lens to produce a small displacement in the X direction. Similarly, when it is desired to move the optical engine lens in the Y direction, a suitable voltage is applied to the second piezoelectric ceramic sheet 1062. This piezoelectric ceramic sheet elongates due to the current, reaching a nanometer-scale distance. The specifications of the second spring 1052 on the opposite side are adapted to the force and movement distance of the piezoelectric ceramic sheet, and thus it is compressed accordingly, thereby causing the optical engine lens to produce a small displacement in the Y direction.

[0099] The size of the hollow part of the micro-displacement adjustment device 100 matches the size of the lens fixing block 101, thereby fixing the optical engine lens and the micro-displacement adjustment device 100 together by means of interference fit through the lens fixing block 101.

[0100] The optical engine lens 108 is connected to the optical engine light source 109 via the optical engine fixing block 102 using screws.

[0101] 103-Positioning bead, 104-Connecting flange, 105-Counterhead screw, 106-Minimum gap, 1021-Boss, 108-Optical lens, 109-Optical source

[0102] like Figure 7 As shown, a positioning bead 103 is embedded in the optical engine fixing block 102. A boss 1021 is provided at the bottom of the optical engine fixing block 102. The height of the boss is greater than the thickness of the connecting flange between the bottom of the optical engine lens 108 and the optical engine light source 109, so that a gap is maintained between the bottom of the optical engine lens 108 and the optical engine light source 109. The height of this gap is less than the height of the positioning bead 103, so that the positioning bead 103 is set to interference fit. Thus, the elasticity of the positioning bead 103 is used to press the optical engine lens 108 tightly against the optical engine light source 109. At this time, the optical engine lens 108 will not move when no force is applied. When a force is applied in a certain direction, the optical engine lens 108 will move in the direction of the force.

[0103] In this embodiment, the controller of the DLP device linearly amplifies the control command voltage signal to a high-voltage signal with a value range of 0-150V, and then transmits it to the piezoelectric ceramic in the micro-displacement adjustment device. This causes the piezoelectric ceramic to deform and elongate, with the deformation being directly proportional to the voltage magnitude. When two mutually perpendicular piezoelectric ceramics are energized, the lens can be pushed to move slightly in two mutually perpendicular directions on the plane. The magnitude of the movement distance can be controlled by adjusting the control voltage supplied to the piezoelectric ceramics.

[0104] By utilizing the physical deformation property of piezoelectric ceramics under voltage, the optical engine lens can undergo minute two-dimensional displacements, thus slightly shifting the lens and causing a translation of the projected image. Previously, one image was projected per layer; however, with the micro-displacement adjustment device, multiple images with offset coordinates can be projected per layer by finely adjusting the lens position. After merging these images, image accuracy is improved. Then, during curing and printing, the model surface exhibits fewer water ripples, resulting in a more coherent surface and ensuring a smooth finish. This method optimizes and improves a low-precision optical engine into a high-precision one at a relatively low cost, possessing significant market application value.

[0105] In the fifth embodiment of the present invention, the dimensions of the hollow portion inside the micro-displacement adjustment device are matched with the optomechanical light source. That is, by mounting the micro-displacement device on the optomechanical light source and energizing the piezoelectric ceramic, the light source is moved slightly in two mutually perpendicular directions on the plane, while keeping the position of the optomechanical lens fixed. This effectively achieves a relative micro-displacement between the optomechanical lens and the optomechanical light source, thereby causing a translation of the projected image. Therefore, it can also improve the surface finish of the 3D printed model.

[0106] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A micro-displacement adjustment device, said micro-displacement adjustment device being used in digital light processing 3D printing, characterized in that, It includes a first substrate portion, a second substrate portion, a first retractable component, and a displacement recovery component; The second substrate portion has a frame structure; the first substrate portion is disposed around the outside of the second substrate portion, and both the first substrate portion and the second substrate portion are symmetrical with respect to the first axis; the first substrate portion and the second substrate portion are made of an elastic alloy. The first retractable component is disposed between the first substrate portion and the second substrate portion and is configured to extend and retract along the direction of the first axis, thereby causing the second substrate portion to move back and forth relative to the first substrate portion along the direction of the first axis. The displacement recovery component is disposed at the other end opposite to the first retractable component between the first substrate portion and the second substrate portion, and is configured to provide a restoring force to the second substrate portion when the first retractable component causes the second substrate portion to move relative to the first substrate portion. The direction of the restoring force is opposite to the direction of the force applied by the first retractable component to the second substrate portion. The displacement recovery component is further configured to shorten accordingly when the first retractable component extends, and to extend accordingly when the first retractable component shortens. The displacement recovery component includes a first elastic component; The first substrate portion is provided with a first elastic component receiving space and a first retractable component receiving space opposite to each other on both sides of the second axis. The shapes of the first elastic component receiving space and the first retractable component receiving space are both set to be symmetrical with respect to the first axis. The second axis is perpendicular to the first axis; A first gap space symmetrical with respect to the first axis is provided between the first substrate portion and the second substrate portion; A first sheet-like substrate portion is formed between the first elastic member receiving space and the first gap space, and a first sheet-like substrate portion is formed between the first stretchable member receiving space and the first gap space. The first sheet-like substrate portion is configured to be symmetrical with respect to the first axis. The first retractable component is disposed within the first retractable component accommodating space; The first elastic member is disposed within the first elastic member receiving space and is configured to provide an elastic force in the direction along the first axis; It also includes a third substrate portion and a second retractable component; The third substrate portion is a frame structure and is made of an elastic alloy; the second substrate portion is disposed around the outside of the third substrate portion, and both the second substrate portion and the third substrate portion are symmetrical with respect to the second axis; The second substrate portion is provided with a second elastic component receiving space and a second retractable component receiving space opposite to each other on both sides of the first axis. The shapes of the second elastic component receiving space and the second retractable component receiving space are both set to be symmetrical with respect to the second axis. A second gap space symmetrical with respect to the second axis is provided between the second substrate portion and the third substrate portion; A second sheet-like substrate portion is formed between the second elastic member receiving space and the second gap space, and a second sheet-like substrate portion is formed between the second stretchable member receiving space and the second gap space, and the second sheet-like substrate portion is symmetrical with respect to the second axis. The second retractable component is disposed within the second retractable component receiving space and is configured to extend and retract along the direction of the second axis, thereby causing the third substrate portion to move back and forth relative to the second substrate portion along the direction of the second axis; The two sides of the second elastic member accommodating space along the second axis are elastically connected, thereby enabling an elastic restoring force to be provided when the third substrate portion is displaced relative to the second substrate portion. The first sheet-like substrate portion is formed in one step using a slow wire EDM process, and the second sheet-like substrate portion is also formed in one step using a slow wire EDM process. This ensures that the thickness of both the first and second sheet-like substrate portions remains uniform. When the second substrate portion is pushed, it is guaranteed to always move in a straight line along the first axis. When the third substrate portion is pushed, it is guaranteed to always move in a straight line along the second axis, without deflecting due to uneven material thickness. The first retractable component includes a piezoelectric ceramic, and the second retractable component includes a piezoelectric ceramic. The piezoelectric ceramic is configured to expand and contract accordingly based on the received voltage. The movement distance of the piezoelectric ceramic is on the nanometer scale, thereby enabling the micro-displacement adjustment device to achieve nanometer-level micro-displacement adjustment.

2. The micro-displacement adjustment device as described in claim 1, characterized in that, The first elastic component includes a spring.

3. The micro-displacement adjustment device as described in claim 1, characterized in that, The elastic alloy is spring steel 65Mn.

4. The micro-displacement adjustment device as described in claim 1, characterized in that, The first retractable component includes a magnetostrictive rod, which is configured to extend or retract in response to a received alternating magnetic field signal.

5. The micro-displacement adjustment device as described in claim 1, characterized in that, It also includes a second elastic member disposed within a second elastic member receiving space and configured to provide an elastic force in the direction along the second axis.

6. The micro-displacement adjustment device as described in claim 5, characterized in that, The second elastic component includes a spring.

7. The micro-displacement adjustment device as described in claim 1, characterized in that, The second retractable component includes a magnetostrictive rod configured to extend or retract in response to a received alternating magnetic field signal.

8. An optical engine, said optical engine being used for digital light processing 3D printing, characterized in that, Includes a micro-displacement adjustment device, a lens fixing block, an optical engine fixing block, an optical engine lens, and an optical engine light source; The micro-displacement adjustment device includes a first substrate portion, a second substrate portion, a third substrate portion, a first retractable component, a second retractable component, a first elastic component, and a second elastic component. The first substrate portion is disposed around the outside of the second substrate portion, and both the first substrate portion and the second substrate portion are symmetrical with respect to the first axis; the second substrate portion is disposed around the outside of the third substrate portion, and both the second substrate portion and the third substrate portion are symmetrical with respect to the second axis; The second axis is perpendicular to the first axis; The first retractable component is disposed between the first substrate portion and the second substrate portion and is configured to extend and retract along the direction of the first axis, thereby causing the second substrate portion to move back and forth relative to the first substrate portion along the direction of the first axis. The second retractable member is disposed between the second substrate portion and the third substrate portion and is configured to extend and retract along the direction of the second axis, thereby causing the third substrate portion to move back and forth relative to the second substrate portion along the direction of the second axis; The first elastic member is disposed at the other end opposite to the first retractable member between the first substrate portion and the second substrate portion, and is configured to provide a first restoring force to the second substrate portion when the first retractable member causes the second substrate portion to move relative to the first substrate portion. The direction of the first restoring force is opposite to the direction of the force applied by the first retractable member to the second substrate portion. The second elastic member is disposed at the other end opposite to the second retractable member between the second substrate portion and the third substrate portion, and is configured to provide a second restoring force to the third substrate portion when the second retractable member causes the third substrate portion to move relative to the second substrate portion. The direction of the second restoring force is opposite to the direction of the force applied by the second retractable member to the third substrate portion. The first substrate portion is provided with a first elastic component receiving space and a first retractable component receiving space opposite to each other on both sides of the second axis. The shapes of the first elastic component receiving space and the first retractable component receiving space are both set to be symmetrical with respect to the first axis. The second substrate portion is provided with a second elastic component receiving space and a second retractable component receiving space opposite to each other on both sides of the first axis. The shapes of the second elastic component receiving space and the second retractable component receiving space are both set to be symmetrical with respect to the second axis. A first gap space symmetrical with respect to the first axis is provided between the first substrate portion and the second substrate portion; A first sheet-like substrate portion is formed between the first elastic member receiving space and the first gap space, and a first sheet-like substrate portion is formed between the first stretchable member receiving space and the first gap space. The first sheet-like substrate portion is configured to be symmetrical with respect to the first axis. A second gap space symmetrical with respect to the second axis is provided between the second substrate portion and the third substrate portion; A second sheet-like substrate portion is formed between the second elastic member receiving space and the second gap space, and a second sheet-like substrate portion is formed between the second stretchable member receiving space and the second gap space, and the second sheet-like substrate portion is symmetrical with respect to the second axis. The first retractable component is disposed within the first retractable component receiving space and is configured to extend and retract along the direction of the first axis, thereby causing the second substrate portion to move back and forth relative to the first substrate portion along the direction of the first axis. The second retractable component is disposed within the second retractable component receiving space and is configured to extend and retract along the direction of the second axis, thereby causing the third substrate portion to move back and forth relative to the second substrate portion along the direction of the second axis; The first elastic member is disposed within the first elastic member receiving space and is configured to provide an elastic force in the direction along the first axis; The second elastic member is disposed within the second elastic member receiving space and is configured to provide an elastic force in the direction along the second axis; The first sheet-like substrate portion is formed in one step using a slow wire EDM process, and the second sheet-like substrate portion is also formed in one step using a slow wire EDM process. This ensures that the thickness of both the first and second sheet-like substrate portions remains uniform. When the second substrate portion is pushed, it is guaranteed to always move in a straight line along the first axis. When the third substrate portion is pushed, it is guaranteed to always move in a straight line along the second axis, without deflecting due to uneven material thickness. The first retractable component includes a piezoelectric ceramic, and the second retractable component includes a piezoelectric ceramic, the piezoelectric ceramic being configured to expand or contract accordingly based on the received voltage; The third substrate portion has an opening in the middle for fixed connection with the optical-mechanical lens, thereby enabling the optical-mechanical lens to move accordingly. The micro-displacement adjustment device is connected to the optical-mechanical lens through the lens fixing block and is configured to drive the optical-mechanical lens to move. The optical engine lens is connected to the optical engine light source via the optical engine fixing block; The piezoelectric ceramic moves at the nanometer level, enabling the micro-displacement adjustment device to achieve nanometer-level micro-displacement adjustment, thereby pushing the optical-mechanical lens to cause the projection image to shift.

9. The optical engine as described in claim 8, characterized in that, The first elastic component and the second elastic component both include springs; Positioning beads are mounted on the optical engine fixing block. A boss is provided at the bottom of the optical engine fixing block. The height of the boss is greater than the thickness of the connecting flange between the bottom of the optical engine lens and the optical engine light source, so that a gap is left between the bottom of the optical engine lens and the optical engine light source. The height of the gap is less than the height of the positioning beads, so that the positioning beads are set to interference fit, thereby using the elasticity of the positioning beads to press the optical engine lens tightly against the optical engine light source.

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