Ground-Based and Airborne Telescopes VIII 2020
DOI: 10.1117/12.2561446
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Analysis of LAMOST optical fiber positioning units closed-loop operation by dual-telecentric measurement system

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Cited by 4 publications
(2 citation statements)
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“…In LAMOST, 4000 fiber units are almost evenly distributed over a 20-square-degree spherical coronal focal surface, while each of the fibers can be moved with two degrees of freedom by two motors. [1] In this case, it can observe and position 4000 targets simultaneously and locate the fibers accurately in accordance with the position of stars in a few minutes, greatly improving the observation efficiency. In order to ensure that there are no blind spots, it is necessary to overlap partly the observation areas of the fiber units, which may lead to collisions between adjacent units in the course of movement.…”
Section: Introductionmentioning
confidence: 99%
“…In LAMOST, 4000 fiber units are almost evenly distributed over a 20-square-degree spherical coronal focal surface, while each of the fibers can be moved with two degrees of freedom by two motors. [1] In this case, it can observe and position 4000 targets simultaneously and locate the fibers accurately in accordance with the position of stars in a few minutes, greatly improving the observation efficiency. In order to ensure that there are no blind spots, it is necessary to overlap partly the observation areas of the fiber units, which may lead to collisions between adjacent units in the course of movement.…”
Section: Introductionmentioning
confidence: 99%
“…However, the precise position of the internal control points cannot be measured after the telescope is in operation. 19 To solve this problem, a fiber position measurement method based on the external planar target (EPT) is proposed in this paper. Using the external control points on the EPT instead of the internal control points, the EPT is flexibly assembled on the focal surface or disassembled, and the precise coordinates of the external control points distributed on the EPT are measured off-line, thus effectively avoiding the assembly error in the process of measuring the internal control points.…”
Section: Introductionmentioning
confidence: 99%