• The Optical Journal
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• s.118
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• pp.25-27
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• 2008

국광학거울을 제작하기 위해서는 가공기술과 초정밀 측정기술이 수반되어야 한다. 국내에서는 100개 이상의 광학렌즈 및 거울 가공업체가 있으나 대부분 직경 1인치 이내의 소형광학계를 주로 생산하고 있고 면 형태 역시 구면이 대부분이다. 최근 휴대폰 카메라 등에 비구면을 사용하고 있지만 대부분 다이아몬드터닝 머신 등을 이용한 정밀급 가공수준이므로 대형 광학거울에 같은 기술을 적용할 수 있다고 보기에는 무리가 따른다. 본 원고에서는 대구경 정밀 광학거울 가공, 평가 및 코팅기술을 설명하고 관련 기술의 전망에 관하여 간단히 언급하고자 한다.

• Proceedings of the Optical Society of Korea Conference
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• 2002.07a
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• pp.30-31
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• 2002

하나의 구동기를 작동하여 거울을 변형시킬 때, 변형된 거울면의 형태를 영향 함수(influence function)라고 정의하며, 이러한 영향 함수를 이용하여 적응 광학계의 주요한 광학 요소인 변형 거울을 효과적으로 모형화하고 설계할 수 있다. 본 논문에서는 유한요소해석을 이용하여 계산된 변형 거울의 실제 영향 함수를 가우시안 함수(Gaussian function) 형태로 단순화하고, 추가로 구동기들 사이의 영향을 고려한 커플링 계수(coupling coefficient)를 도입하여, 주어진 구동기 배열에 대한 영향 함수를 결정하였다. (중략)

• The Journal of Korean Institute of Communications and Information Sciences
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• v.17 no.7
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• pp.688-695
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• 1992

In this paper tile condition for maximum transmission in an integrated-mirror etalon is derived. It is given as the layer-number difference between the top mirror and the bottom mirror The difference is dependent on the ratio of refractive indices of two kinds of quarter-ways layers.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.4 no.1
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• pp.25-36
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• 1986

Minimum three pairs of model are necessary to determine absolute coordinates of three-dimensional objects. This paper researches the method of analyzing three-dimensional coordinates of all sides of objects by photographing a pair of stereo model through the medium of mirror. An objective lies in improving the accuracy and the efficiency of mirror images method by introducing an error correction function for distortion of the mirror. Projected-onto-mirror points are transformed on the object plane through mirror plane equation. As the result, X-coordinates error is the largest and Y, Z-coordinates error represents about 1mm. Also, accuracy can be improved by introducing correction function for left and right mirror and correcting the distortion of mirror.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.24 no.3
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• pp.109-123
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• 2013

The discovery of the mirror neuron system (MNS) is one of the most important neuroscientific achievements in the 20th century. Some researchers had reported that MNS dysfunction was discovered in autism spectrum disorders (ASD). Finally, the 'broken mirror' theory of ASD was announced in the mid 2000's. According to this theory, ASD cannot simulate the mind and behavior of others due to MNS dysfunction; therefore, they cannot imitate the behaviors and empathized with the mind of others. However, ASD does not always show imitation problems. The researchers who have criticized the 'broken mirror' theory proposed the 'social top-down response modulation (STORM)' theory. On STORM theory, the medial prefrontal cortex or temporo-parietal junction, brain areas related with mentalising, might modulate MNS according to social context. We compared the strengths and weaknesses of each theory.

• The Journal of the Korea Contents Association
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• v.14 no.3
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• pp.215-222
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• 2014

Recent years, mirror therapy or mirror neuron therapy has been used to improve neural damage of upper extremities among stroke patients. This systematic review was conducted to assess the clinical effect of mirror therapy used for the treatment of upper extremities for patients with stroke. After literature search, researchers selected for 9 randomized controlled clinical trial studies registered up to October 2013 based on PubMed database, using the following search terms: mirror therapy, mirror neuron, stroke, paresis, hemiplegia, upper extremity. There were significant improves of distal upper extremity function in the use of mirror therapy groups but the research using range of motion(ROM) as outcome measure. In conclusion, mirror therapy was more effective than conventional therapies or sham therapies for upper recovery of distal upper extremity function among stroke patients.

• Journal of the Korean Society of Radiology
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• v.12 no.1
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• pp.101-106
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• 2018

Multilayer mirrors have widely been used for monochromatization of X-ray with high reflection efficiency. The reflected X-ray energy or wavelength is determined by the d-spacing of a multilayer mirror and the incidence angle. The reflectivity critically depends on the number of bilayers and surface roughness on each interface. The multilayer mirror has a structure of alternative deposition of high and low Z-elements on the substrate. Each interface should be considered in the calculation of reflectivity. In this paper, we examine the degradation of reflectivity by the inter-diffusion combined with surface roughness on each interface for a W/Si multilayer mirror. In the depth-graded W/Si multilayer mirror, the FWHMs for angle and energy were larger than them of the uniform multilayer mirror. Inter-diffusion considerable gave rise to the degradation of reflectivity. To obtain measured reflectivity closed to the expected reflectivity, the inter-diffusion on W-Si and Si-W interfaces should be considered.

• The Journal of the Korea Contents Association
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• v.20 no.9
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• pp.19-28
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• 2020

Focusing on (2017), I would like to consider the way twin motifs' desires, deaths, and fantasies are reproduced in mirror images. First, the desire of twin motifs expresses the duality of good/evil and norm/desire as a mirror of sensual temptation. Second, the death of twin motifs expresses the spread of death as a mirror of punishment. Third, the fantasy of twin motifs expresses mental defense as fragmented mirror. In , the twin motifs effectively express three keywords-desire, death, and fantasy- with three mirror images-duality, punishment and division.

• Cartoon and Animation Studies
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• s.41
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• pp.429-454
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• 2015

The starting point of this discussion resides in the 'eyes' of mirror in a sense of seeing the self reflected in a mirror. The meaning of mirror has been evolved over the centuries while strengthening its sense of identity by bringing up some questions for resemblance, reproduction, self-reflection and reality. A mirror has also extended its vision and provided with a range of images that the self can't have. In this regard, looking into a mirror has been a sustained focus of attention by creating another ostensible being of self-image. This shows the two sides of mirror, which reveals an ambiguous gap between substance and illusion. An excessive immersion in a reflected image in a mirror is intensified and expressed today. The eyes of mirror consisting of a complex dual structure show relations between a person who sees and a person who is seen, which draws a hazy line of demarcation between the subject and the object. This opens up the possibility of the world of chiasme, where you could face all the aspects being from the eyes of others. Furthermore, the meaning of the reflection in a mirror has formed a creative discourse as an enigmatic medium that creates a variety of 'eyes' in various forms of aesthetic expression like paintings and literature. I accordingly suggest that the 'eyes of mirror' is the ambiguous 'eyes of human being' reflected in two territories of the world. Therefore, I will present the historical development of the perspective on the mirror to take a concrete approach in which it opens up the reflective structure of resemblance through a series of examples projected onto the literary and artistic productions. This study will serve as ruminations on the fact that your life is being existent in 'chiasme' of mutual entanglement between the self and the world by investigating relations between a person who sees and a person who is seen, in other words, relations between the perceiving subject and the eyes of others reflected in a mirror.

• Korean Journal of Optics and Photonics
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• v.9 no.2
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• pp.92-95
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• 1998

In this paper, we have shown theoretically that a nonlinear etalon with nonlinear mirrors exhibits optical bistability. It can be swithed with less power than a nonlinear etalon with linear mirrors.