Spatiotemporal theory of a gyrotron based on a three-mirror cavity
Sign Up to like & getrecommendations! Published in 2024 at "Physics of Plasmas"
DOI: 10.1063/5.0194450
Abstract: We present the quasi-analytical spatiotemporal theory of the resonant traveling-wave tube scheme of a gyrotron based on the transverse amplifications of the operating wave and on the use of a remote delayed feedback. The main… read more here.
Keywords: gyrotron based; spatiotemporal theory; three mirror;
Improved Three-Mirror Geometry Calibration Method With Visual Guidance for Phase Measuring Deflectometry
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Transactions on Instrumentation and Measurement"
DOI: 10.1109/tim.2025.3628438
Abstract: The phase measuring deflectometry (PMD) has been widely applied to measure specular objects. However, the placement of the calibration mirror is still challenging: excessively large or small angles may cause the calibration algorithm to fail… read more here.
Keywords: mirror; phase measuring; three mirror; measuring deflectometry ... See more keywords
Aberration compensation strategy for the radius of curvature error of the primary mirror in off-axis three-mirror anastigmatic telescopes.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.431908
Abstract: This paper discusses compensation strategies for the aberration fields caused by the error in the radius of curvature (ROC) of the primary mirror (PM) in pupil-offset off-axis three-mirror anastigmatic (TMA) astronomical telescopes. Based on the… read more here.
Keywords: axis three; mirror; aberration; error ... See more keywords
Optical design of a cooled mid-wave infrared off-axis three-mirror system with a low F-number and wide field of view.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.449841
Abstract: Infrared imaging systems with a wide detection scale, excellent precision, and high resolution are playing an increasingly important role in many fields. Compared with uncooled infrared detectors, the cooled infrared detectors have the advantages of… read more here.
Keywords: system; mirror; axis three; mid wave ... See more keywords
Design of a compact off-axis freeform three-mirror system in a circular configuration.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.460838
Abstract: A compact off-axis three-mirror system, especially with a wide field of view and small f-number, continues to present challenges in the optical design field. To design a compact off-axis three-mirror system based on a freeform… read more here.
Keywords: three mirror; mirror system; compact axis; design ... See more keywords
Optical design method of a three-mirror anastigmatic telescope with low misalignment sensitivity based on the nodal aberration theory.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.463869
Abstract: We propose a design method for a three-mirror anastigmatic telescope with low misalignment sensitivity and deduce the analytic expression between the misalignment aberration and its optical parameters based on the nodal aberration theory. We establish… read more here.
Keywords: telescope; aberration; mirror; misalignment sensitivity ... See more keywords
Cooled infrared off-axis freeform three-mirror system design with convenience in testing and assembly.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.479208
Abstract: A cooled infrared off-axis freeform three-mirror system, especially with a small f-number and 100% cold stop efficiency, continues to present challenges in design, testing, and assembly. A primary mirror and tertiary mirror integrated structural model… read more here.
Keywords: infrared axis; mirror; cooled infrared; mirror system ... See more keywords
Design method for zoom systems based on magnification ratio modulation of afocal off-axis three-mirror anastigmat systems.
Sign Up to like & getrecommendations! Published in 2024 at "Optics express"
DOI: 10.1364/oe.536557
Abstract: Achieving higher resolution and larger zoom ratio is one of the primary goals of zoom optical systems. To this end, we propose a new zoom configuration that combines a modulatable magnification off-axis three-mirror system with… read more here.
Keywords: system; axis three; three mirror; ratio ... See more keywords