Design and functional test of a novel optical testing target

Zhang, Shaojun; Gao, Yunguo; Xue, Xiangyao; Wang, Guang; Li, Heng-dong

doi:10.1007/s11801-018-8061-6

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…where p = 2.2 × 10 −3 mm is the pixel size of the CMOS and X = (X i+1 − X i ). By equations (9) and (11), the sensitivity S of the measurement channel formed by the CMOS-IDE pair can be obtained. It is expressed as…”

Section: B Analysis Of the Experimental Resultsmentioning

confidence: 99%

“…To improve the measurement accuracy of a radio telescope, it is necessary to design a system that can directly measure its actual deformation during its operation to realize a real-time compensation technology for the deformation of its main mirror. To this end, the United States GBT uses a measurement system based on multiple laser trackers [9]- [11]. To obtain the ideal measurement accuracy of this system, each laser tracker needs to measure more than 180 measurement points (up to several hundred times) for a total measurement time of 8 min.…”

Section: Introductionmentioning

confidence: 99%

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CMOS Multi-Matrix Optoelectronic System for High Speed Measurement of Main Mirror Deformation Large Diameter Radio Telescope

Qin

Konyakhin

et al. 2020

IEEE Access

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A complementary metal-oxide semiconductor (CMOS) multi-matrix-based optoelectronic system is proposed and studied to measure the deformation of each connection point of a large full-rotatable radio telescope. The system is based on 18 multi-matrix base units. Theoretical investigations demonstrate that the system can provide real-time measurement of multi-point displacements quickly (within 21 seconds). Experimental investigations reveal that the actual measurement error of the photoelectric measurement unit designed in this paper is 0.024 mm. It is inferred that the measurement displacement error will not exceed 0.05 mm in an actual measurement of the full main mirror of the large diameter radio telescope, thus confirming the feasibility of the system. INDEX TERMS Measuring deformations, millimeter-range radio telescope, multi-matrix measurement system, optoelectronic system.

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Section: B Analysis Of the Experimental Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%