• Korean Journal of Optics and Photonics
• /
• v.22 no.4
• /
• pp.161-169
• /
• 2011

In this paper, a tolerance allocation method using Monte-Carlo simulation with measured reflective eccentricity for high-sensitive IR optics is proposed. During optics fabrication and alignment, reflective eccentricity was measured using an optical centration measurement instrument. A Monte-Carlo simulation was performed using measured eccentricity data, and it gives statistical estimated performance of the optics after fabrication. The validity of the proposed tolerance allocation method was verified comparing the estimated MTF result with the measured MTF result of the fabricated optics.

• Korean Journal of Optics and Photonics
• /
• v.31 no.5
• /
• pp.231-231
• /
• 2020

• The Optical Journal
• /
• s.176
• /
• pp.22-25
• /
• 2020

• Proceedings of the Optical Society of Korea Conference
• /
• 2009.02a
• /
• pp.277-277
• /
• 2009

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

No Abstract.See Full-text

• Proceedings of the Optical Society of Korea Conference
• /
• 2007.02a
• /
• pp.189-190
• /
• 2007

• Journal of Korean Ophthalmic Optics Society
• /
• v.2 no.1
• /
• pp.45-54
• /
• 1997

We chose four typas of Huygenian, Ramsden, Kellner, Erfle, among the eyepieces frequently used for optical instruments. Then we calculatde their optical properties and investigated characters of each type by comparing them.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.42 no.11
• /
• pp.958-967
• /
• 2014

A hybrid method based on high-frequency asymptotic optics was developed in order to predict the RCS of flying vehicles for RCS reduction studies. In cavity return, the rays are assumed to bounce from the inlet cavity based on the laws of geometrical optics and to exit the cavity via the aperture. In other parts of a flying vehicle, the physical optics method is applied to compute the back-scattered field from the solid surface. The hybrid method was validated by considering simple models of sphere and sphere with cavity. In addition, RCS analysis of a flying vehicle was conducted using the new hybrid electromagnetic scattering method based on physical optics and geometrical optics theories.

• Korean Journal of Optics and Photonics
• /
• v.7 no.3
• /
• pp.296-297
• /
• 1996

• Korean Journal of Optics and Photonics
• /
• v.28 no.5
• /
• pp.187-193
• /
• 2017

The purpose of this study was to investigate some implications for optics education and improvement of the Examination for Appointing Secondary School Physics Teachers (EASSPT), by analyzing the problems in EASSPT. For these purpose, we analyzed 38 optics problems of the EASSPT from the 16 school years of 2002 to 2017. The results of the analysis are as follows: First, optics problems were presented in 10.8% of the physics subject area, which was least frequently. Second, many problems have addressed specific areas such as Snell's law, image of a single lens, or interference. Few problems were found in many other evaluation areas, including optical instruments and aberrations. Third, compared to other areas, optics problems were presented as relatively easy questions, and the problems were presented in more laboratory contexts than daily-life contexts. In addition, we have discussed implications for EASSPT and in-service physics-teacher training.