Optimizing design and precision experiment of focusing mechanism in lightweight space camera

Xue-zhi, 贾学志 Jia; Dong, 王栋 Wang; Lei, 张雷 Zhang; Yuan, 安源 An; Jin-song, 姚劲松 Yao; Guang, 金光 Jin

doi:10.3788/ope.20111908.1824

Cited by 6 publications

(2 citation statements)

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“…A traditional focusing mechanism is composed of motors and transmission systems, mainly including worm and gear focusing mechanisms, a screw focusing mechanism, and a cam focusing mechanism. They provide a high accuracy and resolution, but at the cost of increasing the complexity and cost and reducing the reliability of the structure [ 5 , 6 , 7 , 8 , 9 ]. Some recent studies [ 10 , 11 , 12 , 13 , 14 ] have proposed improved focusing mechanisms, but they are still based on traditional focusing mechanisms and there are still movable motion pair, motion transformation, transmission error, friction, and wear problems.…”

Section: Introductionmentioning

confidence: 99%

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

Chen

Zhu

2023

Sensors

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With the development of space telescopes towards high-resolution and intelligent imaging, the scale and complexity of the focal plane components of large-aperture, off-axis, three-mirror anastigmatic (TMA) optical systems are increasing. Traditional focal plane focusing technology reduces the system reliability and increases the scale and complexity. This paper proposes a three-degrees-of-freedom focusing system based on a folding mirror reflector, with a piezoelectric ceramic actuator as the driver. An environment-resistant flexible support was designed for the piezoelectric ceramic actuator through an integrated optimization analysis. The fundamental frequency of the large-aspect-ratio rectangular folding mirror reflector focusing mechanism was around 121.5 Hz. After testing, it was found to meet the requirements of the space mechanics environment. This system shows promise for application to other optical systems as an open-shelf product in the future.

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Section: Introductionmentioning

confidence: 99%

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

Chen

Zhu

2023

Sensors

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“…If the focal length is not correct, the imaging quality of the target will be affected, thus affecting the image fusion effect and sight distance of the product; so, the synchronous focusing mechanism is an important part of the dual channel telescope system. The range, accuracy and synchronization of the focusing system directly affect the imaging quality of the system [7][8], thus affecting the image fusion effect of the system.…”

Section: Introductionmentioning

confidence: 99%

Design of a new type synchronous focusing mechanism

Zhang¹,

Tan²,

Zhou³

et al. 2018

AIP Conference Proceedings

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Abstract. Aiming at the dual channel telescopic imaging system composed of infrared imaging system, low-light-level imaging system and image fusion module, In the fusion of low-light-level images and infrared images, it is obvious that using clear source images is easier to obtain high definition fused images. When the target is imaged at 15m to infinity, focusing is needed to ensure the imaging quality of the dual channel imaging system; therefore, a new type of synchronous focusing mechanism is designed. The synchronous focusing mechanism realizes the focusing function through the synchronous translational imaging devices, mainly including the structure of the screw rod nut, the shaft hole coordination structure and the spring steel ball eliminating clearance structure, etc. Starting from the synchronous focusing function of two imaging devices, the structure characteristics of the synchronous focusing mechanism are introduced in detail, and the focusing range is analyzed. The experimental results show that the synchronous focusing mechanism has the advantages of ingenious design, high focusing accuracy and stable and reliable operation.

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Design and experimental research of a new type focus mechanism used in space-based telescope

Wang

Jia

2012

2012 IEEE International Conference on Mechatronics and Automation

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Optimizing design and precision experiment of focusing mechanism in lightweight space camera

Cited by 6 publications

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

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

Design of a new type synchronous focusing mechanism

Design and experimental research of a new type focus mechanism used in space-based telescope

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