• The Optical Journal
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• v.13 no.3 s.73
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• pp.14-16
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• 2001

국내 카메라 시장은 1997년 약 1,300억원 규모까지 성장했으나, IMF로 인해 1998년에는 775억원 규모로 -40$\%$의 역신장을 기록하였다. 1999년에는 35mm 카메라 시장규모가 1,000억원대로 회복 국면에 들어섰으며, 2000년 시장규모는 경기 침체 속에서도 1,150억원 수준에 도달해 전년 대비 성장했다. 2001년도 역시 35mm 카메라와 디지털카메라의 성장이 이어지는 가운데 디지털카메라 전체시장 규모는 약63

• The Optical Journal
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• v.12 no.2 s.66
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• pp.12-14
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• 2000

올 해 35mm 카메라 시장 규모는 전년에 비해서 소폭 성장할 것으로 전망되나, 일본업체들의 본격적인 마케팅과, 삼성카메라의 적극적인 수성 지키기, LG상사의 의욕적인 카메라 사업 참여 등으로 업체별 경쟁은 더욱 치열할 것으로 예상된다. 디지털카메라 시장은 130만$\~$200만 이상의 고화소 제품을 중심으로 시장이 형성되고, 시장규모도 급속한 성장을 거듭하면서 200억 이상이 될 것으로 예상된다.

• The Optical Journal
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• v.13 no.2 s.72
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• pp.6-8
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• 2001

2000년 세계 카메라 시장규모는 디지털 카메라의 폭발적인 성장세에 힘입어 1999년 대비 약 3$\%$ 정도 성장한 5,900만대 수준으로 추정된다. 2001년에는 지속적인 경기 침체 속에서도 국내 35mm 카메라 시장은 소폭 성장할 것으로 전망되며 삼성테크원㈜은 초소형 5배줌 등 5개 기종을 새로 선보인다. 디지털카메라는 200만$\~$300만 화소의 수요가 가장 클 것이으로 보이며, 국내 시장규모는 약 630

• Journal of Radiation Protection and Research
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• v.28 no.3
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• pp.183-187
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• 2003

Collimator for $M{\ddot{o}}ssbauer$ source was manufactured for compton scattering experiment. Exposure dose rate was calculated and measured using GM counter for radiation evaluation. These results were well agreed to each other and used for collimator design. SUS303 was used for collimator material because exposure dose rate at 10 cm is about 2 mR/h. The radiation emited from the 35 mm, 65 mm hole was measured using gamma camera which have 4' diameter. 2-D radiation image was acquired and analyzed. The radiation size at Gamma Camera was 8.0 mm and 5.8 mm respectively.

• Journal of Korean Ophthalmic Optics Society
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• v.6 no.1
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• pp.93-100
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• 2001

We analyzed aspheric patterns after we investigated zoom lens' constructions and optical capacities of a ordinary designed 35mm camera with an aspheric zoom lens system in this research. As this lens system was the zoom lens system about infinite object point, it was made to get a short back focal length, be able to use a lens unit more close to the image plane, and be used the compact camera which got a viewing system. The zoom ratio of the system was 1 : 2 and it got a positive and negative power's distribution. As it was determined the 35~70 mm focal length range which the most common people used, it might be called economic optical system considered universality. As it was used two aspheric surface, it was used just three lens, compensated the aberration and schemed lens' miniaturization, lightweightization, and the decrease effect of the unit cost of production.

• The Optical Journal
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• s.133
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• pp.68-71
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• 2011

상대방이나 주위에서 알지 못하도록 촬영하여 자연스러운 동작이나 표정을 담는 사진을 스냅사진, 또는 캔디드 포토라고 한다. 1920년 말 독일의 포토 저널리스트인 에리히 잘로몬(erich salomon)은 당시 처음 시판된 35mm 카메라를 모자에 숨겨서 법정이나 국제연맹회의에 드나들며 남몰래 사진을 찍었다. 그때까지 플래시 촬영에 의한 기념사진적인 보도사진 보다 상황전달이 정확했기 때문에 캔디드라는 이름으로 불리게 되었다. 당시 라이카와 같은 35mm 카메라의 출현으로 캔디드 수법은 기동성에서 보도사진에 일대 혁신을 가져왔다. 또한 순간적이며 동적인 상황을 사진으로 표현할 수 있었고 사진미학에도 획기적인 계기를 가져왔다.

• The korean journal of orthodontics
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• v.34 no.5 s.106
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• pp.448-457
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• 2004

As computer Programs for cephalometric analysis were developed in diagnosis & treatment planning, digital imaging of film-based cephalograms came to be needed. When a digital camera is used, a problem encountered the image distortion produced according to the focal length, which causes errors in indentifying landmarks. In addition, changes in the image size and compression ratio will inevitably produce a low quality image, causing errors in identifying landmarks. Hence. we have found the focal length producing the least image distortion when digital imaging the film-based cephalograms and the minimal digital camera setting which helps to identify the correct landmarks using the COOLPIX4500 digital camera (Nikon, Japan). The results were as follows The image distortion was minimized at a focal length of 16.4mm (79.4mm when converted into a 35mm film camera) when digital imaging the film-based cephalograms. When wide imaging, with a focal length of under IS.4mm, barrel distortion was found and when tole imaging. with a focal length of over 15.4mm pincushion distortion was found. The minimal digital camera setting was $2272{\times}1704$ pixel at normal (1/8) compression from which we can identify the correct landmarks at the same level as tracing the film-based cephalograms manually. As a result. when digital imaging the film-based cephalograms, using a COOLPIX4500 digital camera (Nikon, Japan), the focal length should be 16.4mm the pixel image size over $2272{\times}1704$, and the compression ratio over normal (1/8).

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.22 no.2
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• pp.127-135
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• 2004

The calibration of lens to be used and the planning of photographing planning layout is very important to achieve the requested accuracy in the precision measurement by close-range photogrammetry. Establishment of absolute coordinate system is regarded as another important factor for the purpose of measuring absolute deformation of photogrammetric object. In this study, the following tasks were performed : (1) calibration of super-wide-angle lens or focal length 21mm fer close-range photographing used by 35mm metric camera, (2) development of the measuring system for monitoring of absolute deformation through periodic observation of small area, and, (3) application of this system to monitor the absolute deformation of surface of underwater structure in fixed cycle and to present the efficiency of the system.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.1
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• pp.31-35
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• 2008

Purpose: This study is to design a triplet optical system for CCTV camera lens. Methods: It was a telescopic lens with $5^{\circ}$ field angle, 56 mm focal length, 20 mm diameter, and 2/3 inches sized CCD array detector. Results: The performance of the subject optical system was evaluated by applying ray fan, spot diagram, and diffraction optical MTF. The wavelength was achromatized at Fraunhofer C, d and F-line, and both MTF and tangential & sagittal MTF shows more than 70% at spatial frequency of 50 linepairs/mm. Conclusions: The marketable triplet optical system for CCTV camera was designed and its utility was considered.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.47 no.3
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• pp.35-40
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• 2010

In this paper, we propose a hardware resource sharable camera control processor (CCP) for low-cost and low-power camera cell phones. The main idea behind the proposed architecture is that adds direct access paths in the CCP to share its hardware resources so that the baseband processor expands its capabilities and boosts its performance by utilizing CCF's hardware resources. In addition, we applied a module grain dock-gating method to reduce power dissipation. Hence, the CCP can realize low-power and low-cost camera cell phones with greater hardware efficiency. This chip was fabricated in a 0.18um CMOS process with an active area of $3.8mm\;{\times}\;3.8mm$.