• Korean Journal of Optics and Photonics
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• v.16 no.6
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• pp.521-526
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• 2005

We assembled the optical beam director with diameter 300 mm. This consists of primary, secondary mirrors and 5 folding mirrors. Among them, the primary mirror is the most important component so that we measure any possible deformation on it at every step of assembly. Also, we developed the systematic alignment algorithm, which is essential because the number of mirrors is 7. The final wavefront error of the system is 1.9 wave rms (wave=633 nm) which is 7 times larger than we expected. The main source is the deformation of the 131ding mirrors. We expect that what we have learned from the assembly of this system would be helpful when we deal with a larger system in the future.

• Korean Journal of Optics and Photonics
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• v.22 no.1
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• pp.30-34
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• 2011

A novel alignment method that can be used for aligning the collimating mirror employed in a monochromator is described. In most of the spectrometer industry, the alignment of optical components such as a focusing mirror, a grating and a collimating mirror has been performed manually so far. In this paper, we use a matchedfilter based image correlation technique for measuring the accurate image position which is used for aligning the collimating mirror. The experimental results show that with the proposed scheme automatic alignment can be completed within 10 seconds.

• Korean Journal of Optics and Photonics
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• v.17 no.4
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• pp.354-358
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• 2006

A silicon lens and an insulator of pyrex, components of a micro-electron column, should be assembled by aligning and stacking simultaneously. An optical alignment of a diffraction beam and a laser welding were employed for the assembly of a source lens and an Einzel lens with precision within $\pm$4% for the maximum aperture size. The experimental condition for optical alignment and laser welding are explained. Anodic bonding was used to assist in stacking lenses. A micro-electron column of smaller apertures assembled with precise alignment and fabrication was tested with a current image of a Cu grid of 9$\mu$m in linewidth, and showed a higher resolution in acceleration mode.

• Korean Journal of Optics and Photonics
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• v.14 no.5
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• pp.535-544
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• 2003

The sensitivity analysis of a middle wave infrared optical system with 20: 1 zoom ratio is performed to analyze manufacturing and alignment tolerances, and to establish the alignment logic and the focus control strategy. The characteristics of the sensitivities of Zernike coefficients are investigated to all mechanical displacements and several zoom positions using Code-V Macro. From this result, the tolerances of manufacturing and alignment of the optical system are derived and the effective alignment logic is established. Futhermore, an effective focus control strategy is established to make the system simple and compact.

• The Optical Journal
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• s.177
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• pp.50-51
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• 2020

• The Optical Journal
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• s.176
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• pp.18-19
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• 2020

• Aerospace Engineering and Technology
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• v.6 no.2
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• pp.40-44
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• 2007

Based on the optical design type, the large aperture payload has not only a different characteristic of design, assembly and alignment but also its own merits and demerits. The analysis of characteristic has been performed according to the optical design type and based on this result, our camera is 4 reflective mirror system based on the Korsch type. Each mirror assembly is to be verified in the mirror manufacturer and the Optical Module(OM) will be assembled, aligned and tested by KARI. The final performance of camera depends on the several factors, especially, the optical performance of its OM In parallel with the optical design the conceptual design of OM assembly and alignment has been performed. In this paper, the analysis of characteristic has been performed according to the optical design type and the conceptual design of OM assembly and alignment was described with regard to optical performance.

• Journal of Korean Ophthalmic Optics Society
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• v.7 no.2
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• pp.123-128
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• 2002

This study is to develop optical lining device for vacuum binding of PDP and FED. It is very difficult precise technology to line a front board and back board accurately and fast every time when two boards are joined together. Especially, these technology is difficult to be transferred from developed countries. In this study, the accuracy of lining of two boards in vacuum device by developing an optical lining device for vacuum binding as an image processor and CCD camera configured to be high magnification lens with long focus using optical design.

• Aerospace Engineering and Technology
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• v.10 no.2
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• pp.101-104
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• 2011

For high resolution electro-optical payload, the alignment and assembly of the secondary mirror with respect to the primary mirror is the most important step of the whole camera assembly process. For the purpose of the secondary mirror alignment, Wave front sensor and Collimator would rather be useful than the interferometer because of its small size and easiness of handling. In this paper the brief alignment procedure and method of the secondary mirror of a high resolution electro-optical camera system was introduced.

• Proceedings of the Optical Society of Korea Conference
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• 2000.02a
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• pp.16-17
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• 2000

무선광통신기술은 케이블의 신설 또는 재 설치가 어려운 구간이나 보안성이 요구되는 무선전송 구간에 많이 사용된다. 또한 기존의 무선주파수와 상호간섭이 적으며, 구현이 간편하여 실내의 짧은 광 전송구간과 빌딩간의 고속광전송에 그 이용이 점점 증가하고 있다$^{(1-5)}$ . LOS(Line of sight)방식의 광연결에서는 광원으로부터의 출력빔의 방향과 광검출기의 위치가 잘 정렬되어야 한다. 광원으로부터 광검출기 사이의 신호전송매체가 자유공간이므로 외부의 기계적 진동에 의하여 광원의 위치가 미소하게 변경되는 경우, 출력광의 진행방향이 광검출기의 위치에 일치하지 않아 수신부에서 검출되는 신호는 매우 약해질 수 있다. 본 논문에서는 이러한 경우에 효과적으로 사용할 수 있는 자동정렬형 광검출구조를 개발하였다. 자동정렬형 광검출기의 구조도는 그림[1]과 같다. (중략)