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http://dx.doi.org/10.3807/KJOP.2020.31.6.304

Optical Design of an Off-Axial-Field Two-Mirror System with a Displaced Stop and a Secondary Mirror  

Nam, Ji-Woo (Department of Laser and Optical Information Engineering, Cheongju University)
Lee, Jong-Ung (Department of Laser and Optical Information Engineering, Cheongju University)
Publication Information
Korean Journal of Optics and Photonics / v.31, no.6, 2020 , pp. 304-313 More about this Journal
Abstract
By using an off-axial field with an inverse Cassegrain system where the aperture stop is at the secondary mirror, the two-mirror system can be used for a wide-field objective. However, aberration corrections in conventional two-mirror systems are limited because the design parameters are too small. In this study, we present a new improved design of the off-axial-field two-mirror system. The new design has an independently displaced aperture stop and a secondary mirror. The new design parameters yield more improvement in correction for 5th-order coma and astigmatism, and better aberration balancing for the whole off-axial field. The spot sizes of the new design system are reduced to half of those for a conventional reference design, and the improvement effects are shown for the whole field evenly.
Keywords
Optical system design; Two-mirror system; Off-axial field; Decentered system;
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Times Cited By KSCI : 6  (Citation Analysis)
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