An ultra-lightweight optical platform based on 3D printing and a preparation method thereof

Abstract

A kind of ultra-light optical platform based on 3D printing and its preparation method, platform includes the optical element installation surface of top layer with positioning groove and fine adjustment mechanism, and the hierarchical support framework of "macroscopic gradient beam+microscopic porous filling" integrally connected to its lower surface;Macroscopic beam wall thickness changes along the radial direction in gradient, microscopic porous filling is body-centered cubic lattice and cell size changes along the thickness direction in power function gradient;It also contains function integration area integrated with framework, wiring channel structure formed in the interior or joint of framework, and adjustable support structure distributed at the bottom edge.The platform is integrally formed by 3D printing of carbon fiber reinforced polyether ether ketone;When preparing, first topological optimization, then layer-by-layer printing with specific parameters, after annealing and precision polishing, finally complete optoelectronic device integration and horizontal calibration.The present application realizes weight reduction of more than 50%, with high stiffness, low thermal expansion and excellent damping performance, improves the integration and lightness level of platform.

Description

Technical Field

[0001] This invention belongs to the field of precision optical instrument manufacturing technology, specifically relating to an ultra-lightweight optical platform based on 3D printing technology and its preparation method, which is suitable for scenarios with strict requirements on platform stability and weight, such as high-precision optical experiments, laser transmission systems, and astronomical observation equipment. Background Technology

[0002] The optical platform is the core support structure of a precision optical system, and its performance directly affects the positioning accuracy of optical components, the system's vibration resistance, and overall reliability. Traditional optical platforms are typically manufactured using machined metal materials such as aluminum alloys, stainless steel, or cast iron. While they possess high rigidity and stability, they suffer from the following significant drawbacks:

[0003] 1. Heavy weight: Metal materials have a high density, such as aluminum alloy (about 2.7 g / cm³) and steel (about 7.8 g / cm³), resulting in a large overall platform weight. Common platforms can weigh tens to hundreds of kilograms, increasing installation difficulty and transportation costs. Furthermore, in dynamic environments, the inertial effect can easily reduce vibration resistance.

[0004] 2. Limited vibration reduction design: Traditional platforms achieve vibration reduction by increasing wall thickness or embedding metal damping blocks, but this will further increase the weight, and the damping effect is limited by the damping coefficient of the material itself;

[0005] 3. Poor functional integration: The surface functions of the metal platform require subsequent machining, and the accuracy depends on secondary clamping, which can easily introduce cumulative errors.

[0006] In recent years, additive manufacturing (3D printing) technology has offered new possibilities for the integrated molding of complex structures. Some research has attempted to use general-purpose plastics (such as ABS and nylon) or photosensitive resins to create lightweight platforms. However, these materials have low stiffness, elastic modulus typically <5 GPa, and high coefficients of thermal expansion; for example, nylon has a coefficient of thermal expansion of approximately [missing information - likely a value]. It is difficult to meet the requirements of optical systems for high stiffness (>50GPa) and low thermal deformation (coefficient of thermal expansion <50GPa). (Requirements).

[0007] Therefore, developing a 3D printing optical platform that combines ultra-lightweight design, high stiffness, and excellent damping performance has become an urgent problem for the industry. Summary of the Invention

[0008] This invention aims to provide an ultra-lightweight optical platform based on 3D printing. Through topology optimization structural design, selection of lightweight and high-strength composite materials, and integration of composite damping layers, the platform achieves a weight reduction of over 50% while maintaining high stiffness (≥80GPa equivalent stiffness) and low thermal expansion (≤ It also features excellent damping performance (damping ratio ≥ 0.02), meeting the stringent requirements of precision optical systems.

[0009] The technical solution of the present invention is as follows:

[0010] An ultra-lightweight optical platform based on 3D printing, characterized by including:

[0011] The mounting surface for optical components is a planar or curved area that directly supports the optical components, with a surface roughness Ra ≤ 1.6µm. Depending on the component type, the mounting surface is pre-set with positioning grooves (selected from V-grooves or circular grooves), fixing holes (selected from threaded holes, positioning pin holes, or adhesive holes), and fine-tuning mechanisms (preferably piezoelectric ceramic displacement grooves) to achieve precise positioning, fixing, and fine-tuning of the optical components.

[0012] A lightweight support frame, located below the mounting surface of the optical element, employs a "gradient porous-honeycomb composite structure." This structure is a hierarchical structure of "macro-gradient beams + micro-porous filling." The macro-gradient beams are radially distributed, with beam wall thickness varying radially. The beam wall thickness near the mounting surface of the optical element and near the platform support is greater than that in the middle region. The micro-porous filling is a three-dimensional interconnected body-centered cubic lattice gradient porous structure, wherein the porous cell size near the mounting surface of the optical element is smaller than that away from the mounting surface.

[0013] The functional integration area, located below the mounting surface of optical components and within the gaps or cavities between beams of the lightweight support frame, is integrally printed with the support frame and is used to integrate optoelectronic devices such as photodetectors, circuit boards, and light sources. This area is preferably equipped with heat dissipation holes or fins to aid in heat dissipation. Depending on the routing requirements, at least one of the following routing structures is integrated:

[0014] Embedded wiring: A circular or rectangular cross-section channel is reserved inside the platform. The channel diameter is 0.5~2mm. The channel is filled with insulated wires or conductive metal wires (preferably silver-plated copper wire or gold wire with a diameter of 0.1~0.5mm).

[0015] Concealed surface wiring: The platform surface has grooves with a depth of 0.3~1mm and a width of 0.5~1.5mm. The grooves contain wires, and the surface of the wires is covered with a UV-curable insulating adhesive layer.

[0016] An adjustable support structure, distributed along the edge of the optical platform (preferably three or four evenly distributed), includes a threaded sleeve integrally printed with the platform and an independent adjusting screw. The internal thread of the threaded sleeve is M3~M6, with a height adjustment range of ±5mm and an adjustment accuracy of 0.02~0.05mm / turn. It is used for leveling the platform after installation and compensating for the flatness error of the mounting base.

[0017] The optical platform is integrally formed using carbon fiber reinforced polyetheretherketone composite material through 3D printing. The density of this material is 1.4~1.7 g / cm³, and its coefficient of thermal expansion is... The equivalent elastic modulus is ≥15GPa. The mass fraction of carbon fiber is preferably 10%~20%, and the fiber length is 50~200µm. During the printing process, the carbon fiber is oriented along the printing path, so that the elastic modulus of the platform in the direction parallel to the printing layer is 20%~40% higher than that in the direction perpendicular to the printing layer, thereby achieving optimized directional stiffness.

[0018] This invention also provides a method for fabricating an ultra-lightweight optical platform based on 3D printing, comprising the following steps:

[0019] Step 1: Modeling and Optimization

[0020] A three-dimensional model of the optical platform was established. A variable-density topology optimization algorithm was used, with the goal of minimizing structural compliance and a volume retention rate of 40%–50% as a constraint, to determine the layout and wall thickness distribution of the macroscopic gradient beams, generating the final printable three-dimensional model.

[0021] Step 2: 3D printing

[0022] The model is imported into a 3D printing device (preferably a high-temperature fused deposition modeling device), and carbon fiber reinforced polyetheretherketone (PEEK) material is used for layer-by-layer deposition modeling. The printing parameters are as follows: nozzle temperature: 380~420℃; chamber temperature: 100~130℃; heated bed temperature: 120~150℃; layer thickness: 0.1~0.2mm; printing speed: 20~50mm / s; infill path: reciprocating or honeycomb scanning; when embedded wiring needs to be integrated, printing is paused after reaching the bottom height of the predetermined reserved channel, and the wire or metal wire is placed in the reserved position (the outer diameter of the wire is 0.1~0.3mm smaller than the diameter of the reserved channel), and then printing is resumed so that the upper layer material covers the wire or metal wire.

[0023] Step 3: Post-processing

[0024] Post-processing of the formed optical platform includes:

[0025] Remove the supporting structure;

[0026] Surface sandblasting treatment (removes loose powder and improves surface quality);

[0027] Anneal at 120~150℃ for 1~3 hours and cool with the furnace (to eliminate internal stress and improve crystallinity);

[0028] The mounting surfaces of optical components are precision ground and polished to Ra≤0.8µm;

[0029] Clean the threaded hole with a tap.

[0030] Step 4: Function Integration

[0031] Install optoelectronic devices within the functional integration area, and complete the layout and fixation of embedded or surface-mounted traces as needed.

[0032] Step 5: Horizontal Calibration

[0033] The adjustable screw of the adjustable support structure is installed, and the platform is leveled by rotating the adjusting screw.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] 1) By using a hierarchical structure of "macro-gradient beam + micro-porous filling" and combining it with a topology optimization algorithm, the material removal rate is maximized while ensuring the rigidity of the load transfer path.

[0036] 2) The use of carbon fiber reinforced polyetheretherketone (CF / PEEK) composite material results in a coefficient of thermal expansion as low as [insert value here]. ,exist Within the temperature cycling range, the flatness variation of the mounting surface does not exceed 3μm. Meanwhile, the synergistic effect of the composite material and the microporous structure significantly improves its first-order bending mode damping ratio, greatly enhancing the platform's vibration resistance in dynamic environments.

[0037] 3) Utilizing 3D printing technology, functional integration areas, wiring channel structures (embedded / hidden), and adjustable support structures are directly integrated with the support frame. This breaks through the limitations of traditional metal platforms that require secondary processing and assembly, significantly reducing the number of parts and cumulative errors. It achieves integrated manufacturing of "mechanical support + circuit board + heat dissipation channel," significantly reducing customized production costs.

[0038] 4) In the preparation method, the topology optimization design is directly converted into the 3D printing path. Combined with a specific carbon fiber orientation arrangement process and annealing heat treatment scheme, the consistency and reliability of mass production are guaranteed. Attached Figure Description

[0039] Figure 1 This is a stereoscopic view of the ultra-lightweight optical platform based on 3D printing of the present invention.

[0040] Figure 2 This invention provides a partial structural cross-sectional view of an ultra-lightweight optical platform based on 3D printing, wherein a is a schematic diagram of the mechanism of the ultra-lightweight optical platform based on 3D printing, and b is an internal structural diagram of the lightweight support skeleton.

[0041] Figure 3This is a schematic diagram of the "gradient porous-honeycomb composite structure" in this invention, where a represents a type of honeycomb structure with equal lattice size and gradient, b represents another type of honeycomb structure with equal lattice size and gradient, and c represents a type of honeycomb structure with equal lattice size and gradient.

[0042] Figure 4 The diagram shows a schematic of a body-centered cubic lattice structure and a cross-sectional view of its internal hidden traces. In the diagram, a is an enlarged view of the unit structure of the body-centered cubic lattice, and b is a schematic cross-sectional view of the traces inside the lattice structure.

[0043] In the diagram: 1-Optical component mounting surface; 2-Lightweight support frame; 3-Functional integration area; 4-Adjustable support structure Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0045] This embodiment provides an ultra-lightweight optical platform based on 3D printing, suitable for scenarios with stringent requirements for structural weight, stability, and thermal stability, such as spaceborne laser communication terminals, high-precision optical experiments, and astronomical observation equipment. The following detailed descriptions of the key structural configurations, material selection, and fabrication processes of this invention are provided through several specific embodiments.

[0046] Example 1: Structural Design of an Ultralight Optical Platform

[0047] Please see Figure 1 The top of the platform is the mounting surface 1 for optical components, which is a planar area or a pre-defined curvature area. To meet the flatness requirements of high-precision optical components, this surface is precision machined after 3D printing to achieve a surface roughness Ra≤0.8μm, preferably Ra≤0.4μm.

[0048] According to the preset optical system layout, the following components are directly printed integrally on the mounting surface 1 of the optical components:

[0049] Positioning grooves include V-grooves (for automatic centering of cylindrical lenses) and circular grooves (for positioning of spherical mirrors or detector housings).

[0050] Fixing holes: including threaded holes (integrated M2 and M3 standard threads, screws can be screwed in directly) and adhesive holes (used to permanently fix certain optical components).

[0051] Pre-reserved slots for fine-tuning mechanism: Piezoelectric ceramic displacement slots are reserved at the installation positions of key optical path components for subsequent integration of piezoelectric actuators to achieve sub-nanometer level optical alignment adjustment.

[0052] Three adjustable support structures are evenly distributed along the bottom edge of the platform. Each support structure includes a threaded sleeve integrally printed with the platform and an independent adjusting screw. By rotating the adjusting screw, the platform's height can be adjusted within a range of ±5mm, with an adjustment accuracy of 0.05mm / turn. This is used for leveling the platform after installation and compensating for flatness errors of the mounting base.

[0053] Please see Figures 2 to 3 Below the optical element mounting surface 1 is a lightweight support frame 2, which adopts a "gradient porous-honeycomb composite structure", specifically a hierarchical structure of "macro gradient beam + micro porous filling".

[0054] Macroscopic gradient beams: The macroscopic gradient beams are radially or mesh-like distributed, with the beam wall thickness varying radially. Specifically, the beam wall thickness is defined as follows: in the first region (0~L1 distance from the platform center), the beam wall thickness is T1; in the second region (L1~L2 distance from the platform center), the beam wall thickness is T2; and in the third region (distance greater than L2 distance from the platform center), the beam wall thickness is T3. These three regions satisfy T1≥T3≥T2, where T1=2~4mm, T2=1~2mm, and T3=2~3mm. This gradient wall thickness design is calculated using a topology optimization algorithm, ensuring the rigidity of the load transfer path while maximizing material removal.

[0055] Microscopic porous filling: The macroscopic gradient beam is filled with a three-dimensional interconnected body-centered cubic lattice gradient porous structure. Along the thickness direction (z-direction) perpendicular to the optical element mounting surface 1, the cell size d varies with a power function relationship: Where: z is the distance from the mounting surface of the optical element (0≤z≤H); H is the total thickness of the support frame, H=40mm in this embodiment; n is the gradient exponent, n=2 in this embodiment (i.e., quadratic gradient distribution); d min In this embodiment, d represents the minimum cell size closest to the mounting surface. min =0.5mm; d max In this embodiment, d represents the minimum cell size furthest from the mounting surface. max =2.0mm. Cell wall thickness is uniformly 0.3mm.

[0056] Porosity distribution calculation:

[0057] At z=0 (close to the mounting surface): d=0.5mm, porosity approximately 35%.

[0058] At z=20mm (intermediate layer): d=0.5+1.5×(0.5)²=0.875mm, porosity approximately 55%.

[0059] At z=40mm (bottom): d=2.0mm, porosity approximately 72%.

[0060] This gradient design makes the area near the mounting surface dense to provide local rigidity, while the area further away from the mounting surface is porous to effectively reduce weight. Actual measurements show that, compared to a uniform porous structure (d=1.25mm equal cell size), this gradient porous structure increases stiffness by approximately 22% and reduces peak stress by approximately 18% at the same weight.

[0061] By combining macroscopic gradient beams with microscopic gradient porous filling, the overall weight of the support frame is 0.42kg (69% lighter than a solid aluminum alloy frame of the same volume, which weighs about 1.35kg), with an equivalent stiffness of 72GPa and a first-order natural frequency of 186Hz.

[0062] Please continue to refer to the appendix. Figure 1 The bottom edge of the optical platform is evenly distributed with adjustable support structures 4, preferably three or four. Each adjustable support structure 4 includes a threaded sleeve integrally 3D printed with the platform body and an independent adjusting screw. The internal thread specification of the threaded sleeve is M3~M6. By rotating the adjusting screw, the height of the platform in the vertical direction can be adjusted within a range of ±5mm, with an adjustment accuracy of 0.02~0.05mm / turn. This structure is used for leveling the platform after installation to compensate for the flatness error of the mounting base.

[0063] Example 2: Integration of wiring function and functional integration area

[0064] This embodiment, based on Embodiment 1, further details the functional integration area 3 and the wiring structure.

[0065] The functional integration region 3 is located in the inter-beam gaps or specific cavities of the lightweight support frame 2, and is integrally printed with the support frame for integrating photodetectors, circuit boards, light sources, and other optoelectronic devices. Simultaneously, this region is provided with one or more heat dissipation holes or fins, utilizing the porous structure and the inherent surface area of ​​the printed part to efficiently dissipate the heat generated during the operation of the optoelectronic components. The optical platform has a wiring structure integrated internally or on its surface, including at least one of the following:

[0066] Embedded wiring: During the 3D printing process, channels with circular or rectangular cross-sections, with a diameter of 0.5~2mm, are pre-reserved directly inside the platform. These channels are filled with insulated wires or conductive metal wires. The conductive metal wires are preferably silver-plated copper wires or gold wires, with a diameter of 0.1~0.5mm. This wiring method completely embeds the wires inside the platform, effectively avoiding external environmental interference and physical damage.

[0067] Surface-concealed wiring: Grooves with a depth of 0.3~1mm and a width of 0.5~1.5mm are directly printed on the platform surface. The wires are laid in the grooves and the surface of the wires is covered with a UV-curable insulating adhesive layer, which can protect the wires and keep the platform's appearance clean.

[0068] Through the above design, the optical platform not only serves as a mechanical support component, but also functions as a circuit board and a heat diffusion layer.

[0069] Example 3: Method for fabricating an optical platform

[0070] This embodiment provides a method for fabricating the ultralightweight optical platform described in Embodiment 1 or Embodiment 2 above, comprising the following steps:

[0071] Step 1: 3D Modeling and Topology Optimization: Use 3D modeling software (such as SolidWorks) to establish the initial geometric model of the platform. Employ a variable density topology optimization algorithm, with the goal of minimizing structural compliance and a volume retention rate of 40%~50% as a constraint, to determine the layout and wall thickness distribution of the macroscopic gradient beams. Generate a body-centered cubic lattice gradient porous structure and fill it inside the macroscopic beams. Export the final printable 3D model in STL format.

[0072] Step 2, 3D Printing: The model is imported into the 3D printing equipment and layer-by-layer deposition is performed using carbon fiber reinforced polyetheretherketone (PEEK) material. The printing parameters are: nozzle temperature 380~420℃, chamber temperature 100~130℃, heated bed temperature 120~150℃, layer thickness 0.1~0.2mm, printing speed 20~50mm / s, and the filling path adopts reciprocating or honeycomb scanning.

[0073] Step 3, Post-processing: Post-processing of the formed optical platform includes: removing the support structure, surface sandblasting, annealing at 120~150℃ for 1~3 hours and cooling in the furnace, and precision grinding and polishing of the mounting surface of the optical components to Ra≤0.8µm;

[0074] Step 4: Functional Integration and Wiring: Install optoelectronic devices, such as photodetectors, preamplifier circuit boards, and light source driver modules, in the functional integration area. Secure them with screws or thermal adhesive and lay out embedded or surface-mounted traces as needed.

[0075] Step 5, Leveling Calibration: Screw the adjusting screw into the threaded sleeve of the adjustable support structure 4 on the edge of the platform. Place the platform on the mounting base and, with the assistance of instruments such as a level, complete the overall leveling calibration of the platform by rotating the adjusting screw.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An ultra-lightweight optical platform based on 3D printing, characterized in that, include: An optical element mounting surface is used to directly support optical elements. The surface roughness of the optical element mounting surface is Ra≤1.6µm, and it is provided with positioning grooves, fixing holes and fine adjustment mechanisms for positioning and fixing optical elements. A lightweight support frame is disposed below the mounting surface of the optical element to provide rigid support for the mounting surface. The lightweight support frame adopts a hierarchical structure of "macro-gradient beams + micro-porous filling". The macro-gradient beams are radially distributed, and the beam wall thickness varies radially. The beam wall thickness near the mounting surface of the optical element and near the platform support position is greater than the beam wall thickness in the middle region. The micro-porous filling is a three-dimensional interconnected body-centered cubic lattice gradient porous structure that fills the internal pores of the macro-gradient beams. The porous cell size near the mounting surface of the optical element is smaller than the porous cell size away from the mounting surface of the optical element. The functional integration area is formed in the gaps or cavities between the beams of the lightweight support frame and is used to accommodate and fix the optoelectronic devices. The wiring channel structure is formed inside the lightweight support frame or at the junction of the optical element mounting surface and the lightweight support frame, and is used to lay electrical connection lines. An adjustable support structure is distributed around the bottom edge of the lightweight support frame. The adjustable support structure includes a threaded sleeve integrally printed with the lightweight support frame and an adjusting screw passing through the threaded sleeve. The optical platform can be leveled by rotating the adjusting screw.

2. The ultra-lightweight optical platform based on 3D printing according to claim 1, characterized in that, The optical platform is integrally formed using carbon fiber reinforced polyetheretherketone composite material through 3D printing. The density of this material is... The coefficient of thermal expansion is The equivalent elastic modulus is ≥15GPa, and it meets at least one of the following properties: (a) In the frequency range of 10Hz to 100Hz, the first-order bending mode damping ratio of the platform is ≥0.025; (b) Within the temperature cycling range of -40℃ to 70℃, the flatness variation of the mounting surface of the optical element is ≤3µm; (c) Compared with traditional aluminum alloy honeycomb platforms of the same dimensions, the overall weight is reduced by ≥50%.

3. The ultra-lightweight optical platform based on 3D printing according to claim 1, characterized in that, The surface roughness Ra of the mounting surface of the optical element is ≤0.8µm; the positioning groove is selected from V-groove or circular groove; the fixing hole is selected from threaded hole, positioning pin hole or adhesive hole; the fine adjustment mechanism is a piezoelectric ceramic displacement groove, which penetrates the mounting surface of the optical element and extends into the interior of the lightweight support frame.

4. The ultra-lightweight optical platform based on 3D printing according to claim 1, characterized in that, The beam wall thickness varies radially and is defined as follows: the beam wall thickness is T1 in the first region from the center of the platform (0~L1), the beam wall thickness is T2 in the second region from the center of the platform (L1~L2), and the beam wall thickness is T3 in the third region from the center of the platform (greater than L2), where T1≥T3≥T2, T1=2~4mm, T2=1~2mm, and T3=2~3mm.

5. The ultra-lightweight optical platform based on 3D printing according to claim 1, characterized in that, The cell size d of the microporous filling varies with a power function relationship along the thickness direction z perpendicular to the mounting surface of the optical element: Where: z is the distance from the mounting surface of the optical element, 0≤z≤H; H is the total thickness of the support frame, n is the gradient exponent, and d min d represents the minimum cell size closest to the mounting surface. max This represents the smallest cell size furthest from the mounting surface.

6. The ultra-lightweight optical platform based on 3D printing according to claim 1, characterized in that, The optical platform integrates a wiring structure, which is selected from at least one of the following: (a) Embedded wiring: A circular or rectangular cross-section channel is reserved inside the platform. The channel is filled with insulated wires or conductive metal wires. The channel diameter is 0.5~2mm. (b) Surface-concealed wiring: The platform surface has grooves with a depth of 0.3~1mm and a width of 0.5~1.5mm, and wires are installed in the grooves, with the surface of the wires covered with a UV-curable insulating adhesive layer.

7. The ultra-lightweight optical platform based on 3D printing according to claim 6, characterized in that, The optical platform integrates a wiring structure, and the conductive metal wire is a silver-plated copper wire or a gold wire with a diameter of 0.1~0.5mm.

8. A method for fabricating an ultralightweight optical platform based on 3D printing, characterized in that, The optical platform according to any one of claims 1 to 7 comprises the following steps: Step 1: Establish a three-dimensional model of the optical platform. Using a variable density topology optimization algorithm, with the goal of minimizing structural compliance and a volume retention rate of 40%~50% as a constraint, determine the layout and wall thickness distribution of the macroscopic gradient beams, and generate the final three-dimensional model containing macroscopic gradient beams and microporous filling of body-centered cubic lattice. Step 2: Import the final 3D model into the 3D printing equipment and use carbon fiber reinforced polyetheretherketone (PEEK) material for layer-by-layer deposition. The printing parameters are: nozzle temperature 380~420℃, chamber temperature 100~130℃, heated bed temperature 120~150℃, layer thickness 0.1~0.2mm, printing speed 20~50mm / s, and the filling path adopts reciprocating or honeycomb scanning. During the printing of the lightweight support skeleton, the microporous filling is printed layer by layer, and the wiring channel structure is reserved simultaneously. Step 3: Post-processing of the formed optical platform, including: removing the support structure, surface sandblasting, annealing at 120~150℃ for 1~3 hours and cooling in the furnace, and precision grinding and polishing of the mounting surface of the optical element to a surface roughness Ra≤0.8µm; Step 4: Install optoelectronic devices in the functional integration area, and lay wires in the wiring channel structure according to the wiring requirements; Step 5: Install the adjusting screw into the threaded sleeve of the adjustable support structure, and rotate the adjusting screw to complete the horizontal calibration of the optical platform.

9. The method for fabricating an ultralightweight optical platform based on 3D printing according to claim 8, characterized in that, In step two, the carbon fiber in the carbon fiber reinforced polyether ether ketone material has a carbon fiber mass fraction of 10%~20% and a fiber length of 50~200µm. The carbon fiber is oriented along the printing path during the printing process, so that the elastic modulus of the platform in the direction parallel to the printing layer is 20%~40% higher than that in the direction perpendicular to the printing layer.

10. The method for fabricating an ultralightweight optical platform based on 3D printing according to claim 8, characterized in that, In step two, when using embedded wiring, printing is paused after the 3D printing reaches the bottom height of the predetermined reserved channel. The wire or metal wire is placed in the reserved channel position, and then printing is resumed so that the upper material covers and wraps the wire or metal wire. The outer diameter of the wire or metal wire is 0.1~0.3mm smaller than the diameter of the reserved channel.

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