• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.75.1-75.1
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• 2009

• Bulletin of the Korean Space Science Society
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• 2009.04a
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• pp.39.3-39.3
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• 2009

• Journal of Korean Ophthalmic Optics Society
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• v.10 no.2
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• pp.99-101
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• 2005

This review of the Korean eye anatomy suggests that there may be unsuspected links between anatomical characteristics of the eye and orbit, and optical performance.

• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.1030-1031
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• 2005

• Proceedings of the Korean Magnestics Society Conference
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• 2001.10a
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• pp.112-113
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 2005.10a
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• pp.875-876
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• 2005

• Journal of Korean Ophthalmic Optics Society
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• v.1 no.1
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• pp.127-138
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• 1996

• Proceedings of the Optical Society of Korea Conference
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• 2001.08a
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• pp.5-5
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• 2001

No Abstract.See Full-text

• Journal of the Optical Society of Korea
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• v.19 no.1
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• pp.84-87
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• 2015

For large optical elements which are tested by many sub-apertures, it takes too much time for a sub-aperture stitching algorithm to get the stitching result. To solve this problem, we propose a fast sub-aperture stitching algorithm to quickly compensate for piston, tilt, and defocus errors. Moreover, the new algorithm is easy to understand and program. We use partial derivatives of measurement data to separately solve piston, tilt, and defocus errors. First, we show that the new algorithm has a lower time complexity than the currently used algorithm. Although simulation results indicate that the accuracy of the new algorithm is lower than the current algorithm in all 20 simulations, our experimental results validate the algorithm and show it is sufficiently accurate for general use.

• Journal of the Optical Society of Korea
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• v.15 no.4
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• pp.394-397
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• 2011

For the purpose of fabricating off-axis aspheric optics, we propose an 8-axis-polishing machine combined with a testing tower whose height is up to 9 m. The proposed polishing machine was designed and analyzed by using a well-known finite element method. The eight axes of the machine have a synchronized motion generated by a computer, and each axis was calibrated by a heterodyne laser interferometer or an optical encoder. After calibration, the maximum positioning error of the machine was less than 2 ${\mu}m$ within a whole 2 m ${\times}$ 2 m area. A typical fabrication result of a ${\phi}1.5$ m concave mirror was also described in this manuscript.