A dual-channel focal plane with optical mechanical and electro thermal highly integrated designing is proposed. Firstly a light splitter is applied in the light path, which split the effective light to two focal plane channels with different field of view. To ensure the focusing consistence of these two focal planes, the team splitter is loaded on focusing mechanism, which changed the focusing location of the light, thus the dual-channel focal planes could be focused. The two focal planes have different detectors which give different spectral bands. There are nine detecting spectral bands in all, which is double of the single-channel focal plane camera. With dual channel, multispectral detecting is realized. The spectral range is from visible to near-infrared. This dual-channel focal plane camera is on orbit for more than one year, and it gives fine photos.
3D printing technology is becoming more and more mature, and it is widely used in aerospace, chemical industry, automobile and other fields. Silicon carbide has a series of excellent physical properties such as high elastic modulus, moderate density and good stability. In order to make the space remote sensing camera break through the limitations of traditional processing technology and design ideas, it can further improve the lightweight rate, obtain better force stability, and reduce the demand for the whole satellite resources. In this paper, silicon carbide is used as raw material and 3D printing technology is used to develop space remote sensing camera. Firstly, the advantages and characteristics of 3D printing technology and printing materials are introduced. Then, according to the particularity of the technical characteristics, the methods of using 3D printing technology to design space remote sensing camera are summarized. Then, according to the design method, the design, simulation and optimization of the remote sensing camera structure are carried out. Through the mechanical test, it meets the design expectation.
Compared with the traditional single-channel multi-spectral remote sensing camera, the multi-spectral remote sensing camera with dual-channel imaging can capture more spectral information of spectral segments. In order to make the dual-channel multi-spectral remote sensing camera image well in various complex mechanical environments, the structural dynamic analysis of the camera was carried out. First, the optical system and structural composition of the two-channel camera are introduced. After that, using the Patran finite element analysis software, based on the establishment of the finite element model, the modal analysis, overload adaptability analysis and random vibration analysis of the camera were carried out. According to the analysis results, a damping isolator is added to each mounting foot of the camera, which effectively reduces the random vibration response of the camera's key measuring points. Finally, the mechanical environment test of the camera is carried out. The results of finite element analysis and test are in good agreement, which verifies the correctness of the analysis and calculation results. It shows that the dynamic performance of the dual-channel multi-spectral remote sensing camera with the outer envelope size of 1500×1500×1000mm meets the design requirements.
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