Design of a Focusing Mechanism Actuated by Piezoelectric Ceramics for TMA Telescope

Lu, Ying; Chen, Changzheng; Zhu, Jie

doi:10.3390/s23104610

Cited by 7 publications

(1 citation statement)

References 20 publications

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“…Space cameras are subjected to complex external loads during both the launch segment and the in-orbit operation phase, which include gravitational release into orbit and temperature changes during in-orbit operation. These external loads lead to destabilisation of the optical mirrors and degradation of the imaging performance of the optical system [15][16][17]. Therefore, the force thermal stability of the optic-mechanical system will be one of the core components of the optic-mechanical system design.…”

Section: Optic-mechanical System Design and Integration Analysismentioning

confidence: 99%

Research on the Design and Alignment Method of the Optic-Mechanical System of an Ultra-Compact Fully Freeform Space Camera

Li,

Wang

et al. 2023

Sensors

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As space resources become increasingly constrained, the major space-faring nations are establishing large space target monitoring systems. There is a demand for both the number and the detection capability of space-based optical monitoring equipment. The detection range (i.e., field of view) and parasitic capability (lightweight and small size) of a single optical payload will largely reduce the scale and cost of the monitoring system. Therefore, in this paper, the optic-mechanical system of an ultra-lightweight and ultra-compact space camera and the optical alignment method are investigated around a fully freeform off-axis triple-reversal large field of view (FOV) optical system. The optic-mechanical system optimisation design is completed by adopting the optic-mechanical integration analysis method, and the weight of the whole camera is less than 10 kg. In addition, to address the mounting problems caused by the special characteristics of the freeform surface optical system, a dual CGH coreference alignment method is innovatively proposed. The feasibility of the method is verified by the mounting and testing test, and the test results show that the system wavefront difference is better than 1/10 λ. The imaging test of the space camera and the magnitude test results meet the design requirements of the optical system. The optic-mechanical system design method and alignment method proposed in this paper are instructive for the design and engineering of large field of view full freeform optical loads.

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Section: Optic-mechanical System Design and Integration Analysismentioning

confidence: 99%

Research on the Design and Alignment Method of the Optic-Mechanical System of an Ultra-Compact Fully Freeform Space Camera

Li,

Wang

et al. 2023

Sensors

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Tunable Imaging Distance Focusing Module Directly Driven by a Thin‐plate Piezoelectric Actuator

Wang,

Deng,

et al. 2024

Adv Funct Materials

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With the advancement of imaging technology, the performance of optical focusing modules becomes crucial for determining imaging quality. Conventional focusing modules frequently face challenges of excessive bulk and weight, complicating the integrated design and limiting application fields. Herein, this study presents a piezo‐actuated optical focusing module (POFM) and the construction strategy to alleviate these issues. A novel radial‐bending resonant‐type piezoelectric actuator (RB‐RPA) is developed to directly drive the POFM. The RB‐RPA, which features a hollow structure (27 × 27 × 7 mm3), utilizes both radial and bending vibration modes of a thin metal plate. It achieves a speed of 122.93 mm s−1, a thrust force of 0.14 N, and a displacement resolution of 0.52 µm. Employing the proposed construction strategy, RB‐RPA is integrated with imaging components to fabricate a POFM prototype. Furthermore, the micrometer‐level displacement resolution of POFM facilitates optical focusing on imaging targets, allowing the acquisition of sharp images within 70 ms. It achieves an image resolution of 119.57 lp mm−1 within a 42 mm segment of the captured image. Finally, a QT‐based interface for the POFM, enables real‐time image capture and sharpness evaluation, thereby enhancing imaging efficiency and integration. This work provides a potential candidate for next‐generation imaging devices.

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Improving the in-plane bearing stiffness in folded beam diaphragm flexures

Radgolchin,

Awtar,

Bai

et al. 2025

Mechanism and Machine Theory

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Design of a Focusing Mechanism Actuated by Piezoelectric Ceramics for TMA Telescope

Cited by 7 publications

References 20 publications

Research on the Design and Alignment Method of the Optic-Mechanical System of an Ultra-Compact Fully Freeform Space Camera

Research on the Design and Alignment Method of the Optic-Mechanical System of an Ultra-Compact Fully Freeform Space Camera

Tunable Imaging Distance Focusing Module Directly Driven by a Thin‐plate Piezoelectric Actuator

Improving the in-plane bearing stiffness in folded beam diaphragm flexures

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