• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1997년도 춘계학술대회논문집
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• pp.183-189
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• 1997

In order to help develop more comfortable seat cover fabrics, this study primarily surveyed the actual using conditions and the consumers' opinions of the seat cover fabrics. The results of this study were as follows: 1) The colors of seat cover fabric were mostly achromatic. Regarding comsumers' satisfaction on the colors of seat cover fabric, comsumers in their 20's were less satisfied than other age groups. Most unsatisfied consumers prefered bright colors. 2) On the materials of seat cover fabric, synthethic leather and woven were most widely used. Real leather was most prefered due to its luxury and tactile sensation. Woven was secondarily prefered due to its price and tactile sensation. About fourty percent of consumers covered the seat with other cover fabrics because of soil and other reasons. It will be useful if they could choose and change the seat cover fabircs with different materials and colors. 3) When consumers used the seat cover fabrics, the problems that they indicated were not durability and colorfastness but low breathablity during sweating, static electricity, soil, firmness, and cool sensation at the first contact.

• 복식
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• 제44권
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• pp.104-116
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• 1999

This study was intended to make an inquiry into the effect of lines, shapes and colors (achromatic colors) as apparel design elements on the perceptions of facial size, brightness and shape through an empirical research based on the theories of visual perception and optical illusion that have been studied in Gestalt Psychology, which becomes the basis of apparel design principles. It was shown that the facial size was influenced by the collar size, the degree of neckline cut, and the thickness of the trimming line. The white scarf with the white jacket made the face look darkest while the black scarf with the black jacket made the face look brightest. When the neckline had the characteristic of the line contrasted with the facial shape, the oval-shaped face was perceived to be the most ideal. When the facial shape and the neckline shape were similar, the facial shape was perceived to be more highlighted.

• 한국광학회지
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• 제5권2호
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• pp.252-259
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• 1994

초고속 띄움-들띄움 광학 실험에서 자외선과 가시광선을 쓸 때, 이들의 군속도 차이에 의한 두 펄스 겹침의 불일치를 계산하는 방법을 제시하여 이 효과에 의한 시간 분해능 및 실험 신호 세기의 제한을 논하였다. 이 결과에 의하면 단일 집속 렌즈를 사용하는 실험에서는 나쁜 시간 분해능과 약한 실험 신호를 야기시킨다. 색수차 보정 렌즈 쌍을 이용하는 실험의 해답은 비현실적이다. 그렇지만 각 펼스에 개별 렌즈를 사용하는 실험이나 잘려진 보조 렌즈를 주 렌즈와 함께 사용하는 실험에서는 단일 렌즈를 사용하는 실험에 비해 시간 분해능 및 실험 신호 세기의 현저한 개선을 기대할 수 있다.

• 한국통신학회논문지
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• 제26권8B호
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• pp.1161-1167
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• 2001

본 논문에서는 칼라 영상에 대한 인간 시각 특성과 무채색으로부터 정보를 추출하여 칼라 정지 영상에 효과적으로 워터마크 신호를 삽입하는 방법을 제안하였다. 워터마크는 이진 워터마크를 사용하였으며, 일반적으로 인간 시각 체계 특성에서 무채색(achromatic) 신호보다 유채색(chromatic) 신호에 대한 변별력이 떨어지는 특성을 이용하여 입·출력 장치로 획득된 RGB 좌표계의 칼라 정지 영상을 무채색 성분과 유채색 성분으로 완벽히 분리되는 다른 좌표계로 변환하여 워터마크를 유채색 포화도 성분에 삽입한다. 워터마크를 검출하는 과정은 원영상을 사용하지 않고 유채색 포화도 성분의 변경 형태를 추정하여 삽입된 워터마크를 검출 가능하였다. 실험 결과 특히 비가시성 특성 부분에서는 기존 방법들과 비교할 때 향상된 결과를 얻을 수 있었으며 강인성 또한 좋은 결과를 얻었다.

• 한국가구학회지
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• 제16권2호
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• pp.67-76
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• 2005

Bauhaus, founded in Weimar, Germany in 1919, represented Modernism which is proven in the field of art as well as architecture. Furthermore, in design field, Bauhaus is the essential historical event whose influence continues in contemporary design. Bauhaus furniture is simple and austere and has linear shapes which are suitable for mass production. Bauhaus developed functional furniture design such as knock-down and pre-fabricated furniture. In terms of finishes, Bauhaus furniture epitomizes the influence of De Stijl which used either achromatic colors and three primary colors or natural finishes of wood. Bauhaus contributed to furniture design field as below. 1. Success in mass-produced furniture through standardization and pre-fabrication 2. Pioneered on industrialization through collaboration between academia and industry 3. played essential role developing modem furniture by using not only metal but also such diverse materials as plywood, glass, and leather

• Journal of the Optical Society of Korea
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• 제18권5호
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• pp.495-499
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• 2014

In this paper, a method is proposed for simultaneously measuring the front and back surface profiles of transparent micro-optical components. The proposed method combines a dual-wavelength digital holographic microscope with liquids to record holograms at different wavelengths, and then numerically reconstructs the three-dimensional phase information to image the front and back sides of the sample. A theoretical model is proposed to determine the surface information, and imaging of an achromatic lens is demonstrated experimentally. Unlike conventional interferometry, our proposed method supports nondestructive measurement and direct observation of both front and back profiles of micro-optical elements.

• Current Optics and Photonics
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• 제2권4호
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• pp.324-331
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• 2018

This paper describes a symmetric method for determining a combination of element power and optical material to design a catadioptric system with corrected color aberration and flat Petzval curvature. To graphically obtain the solutions, a glass chart containing the Abbe number, the refractive index, and the optical power, which are closely related to these aberrations, is suggested. First, we recompose an optical system as a doublet of the specific lens and an equivalent single lens, and then locate both lenses on lines that are symmetric to each other on a glass chart, through changing the lens parameters effectively. Utilizing this method, an achromatic catadioptric system with flat Petzval curvature is obtained.

• Journal of the Optical Society of Korea
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• 제19권2호
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• pp.182-187
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• 2015

This paper presents a new graphical method for selecting a pair of optical glasses to simultaneously achromatize and athermalize an imaging lens made of materials in contact. An athermal glass map that plots thermal glass constant versus inverse Abbe number is derived through analysis of optical glasses and plastic materials in visible light. By introducing the equivalent Abbe number and equivalent thermal glass constant, although it is a multi-lens system, we have a simple way to visually identify possible optical materials. Applying this method to design a phone camera lens equipped with quarter inch image sensor having 8-mega pixels, the thermal defocuses over $-20^{\circ}C$ to $+60^{\circ}C$ are reduced to be much less than the depth of focus of the system.

• 패션비즈니스
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• 제8권6호
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• pp.123-136
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• 2004

The purpose of this the end of 20th century fashion about various phenomenon of distopia. This study have the analysis and consideration through the elements and peculiarity of distopia. This study give us the various figures of distopia st fashion as well as the common features of distopia. The study method refers to sundry records, thesis, fashion magazine, publication, the collection works and internet. It is as follows. 'Distopia' prefix to dis of Utopia and means unknown future. Distopia trends towards future negatively. The end of 20th century, it is well brought out various cultures. Movie, novel and pop culture have effect on end of the 20th fashion with a view of distopia. It is the fear and uncertainty of the future. The characters of distopia through the works are divided into formative characteristics and aesthetics meaning. The future fashion of distopia expression mixed and various cultural life, also the mixed of utopia and distopia fashion. Distopia stimulates the designers to the new expression and expose their new areas.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2809-2811
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• 2003

Biochip-based diagnostic technology is an effective, time- and money-saving way of identifying Rifampin and Isoniazid resistant tuberculosis strains. In this paper, we suggest the optical system which is designed with the simple structure and has an appropriate specification for biochip analyzer including a CCD camera system. It consists of two parts with the same structure but opposite direction. each part is made by one lens, achromatic doublet and meniscus. We changed the working distance of the optical system and observed its characteristics.