• 한방안이비인후피부과학회지
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• 제14권2호
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• pp.253-261
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• 2001

Objectives This study was performed to evaluate the clinical effect of acupuncture on children's myopia. Methods Among the outpatients with myopia who visited to Department of Acupuncture & Moxibustion, National Medical Center from June 2000 to May 2001, we selected 50 cases that did not involve ,any other pathological condition of eyes and patient age was below 17, whose eyes including with glasses or naked examined by monoocular and biocular visual acuity test per each visit and followed up for 6 weeks. Results We investigated 29 female and 21 male patients. The most distribution of age was 12.26. First mean biocular visual acutity was $0.2{\pm}0.074$. Last mean biocular visual acuity after 6 weeks was $0.8{\pm}0.046(p<0.001). Improved cases on biocular test were 38 cases($76.00\%$). Conclusions These results suggest that the acupuncture therapy is effective treatment modality on children's myopia.

• 한국광학회지
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• 제31권2호
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• pp.88-95
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• 2020

본 연구에서는 헤드업 디스플레이에서 발생하는 왜곡수차와 양안시차를 정량적으로 분석 및 보정하는 방법을 제시한다. 비대칭적인 왜곡수차를 분석하기 위해 다섯 종류의 왜곡수차를 제시하고, 이를 아이박스의 중심부에서 측정된 왜곡수차로부터 다른 4개의 가장자리에서 측정된 왜곡수차의 변화량을 상대적인 왜곡으로 정의하였다. 또한 아이박스 내 6개의 양안 위치에서 수렴 양안시차 및 발산 양안시차에 대해 정의하고 평가하였다. 이런 분석 방법을 이용하여 아이박스 내 눈의 위치에 따른 양안시차 및 왜곡수차 변화량을 제한조건으로 두어 최적설계를 진행하여 왜곡수차 및 양안시차가 보정 된 헤드업 디스플레이용 광학계를 구성하였다.

• Current Optics and Photonics
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• 제5권6호
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• pp.660-671
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• 2021

We present a novel optical system for an augmented reality head-up display (AR HUD) with two virtual images at different conjugates by employing a confocal off-axis two-mirror and introducing the horopter circle. For a far virtual image with large asymmetrical aberrations, we initially obtain an off-axis two-mirror system corrected for these aberrations and compensated for the down angle by configuring its parameters to satisfy the confocal and Scheimpflug conditions, respectively. In addition, this system is designed to reduce the biocular parallax by matching Petzval surface into the longitudinal horopter circle in a near virtual image. This design approach enables us to easily balance the residual aberrations and biocular parallax when configuring the optical system with two different conjugates, which results in an AR HUD available for near and far virtual images together.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1749-1752
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• 2007

The Near to Eye Display (NED) solves the problem of having a display larger than a small portable device. The virtual image of the NED is created using a microdisplay and imaging optics. It is important that the optics does not interfere with the human visual system and that the device is light, compact and easy to wear. In this paper the principles of a biocular NED, which is based on a novel diffractive Exit Pupil Expander (EPE), are presented. The optical system is compact and intrinsically free from distortions and misalignments.

• 한국산학기술학회논문지
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• 제16권9호
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• pp.6227-6235
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• 2015

HUD는 투시형 정보 전시장치로서 최근에 마이크로 디스플레이와 LED 기술의 발달로 소형화가 이루어져 점차 응용분야를 넓혀가고 있다. 본 논문에서는 마이크로 디스플레이 장치인 DLP를 이용하여 영상 전시영역 5인치 급의 양안 관측용 소형 헤드업 디스플레이(HUD) 광학계를 설계하였다. 소형 경량화된 HUD를 설계하기 위하여 광학계의 각 설계요소를 분석하였고 DLP, 프로젝젼 광학계 및 오목렌즈형 영상결합기의 특성들과 설계방식을 살펴보았다. 각 광학계의 연결구조 분석을 통하여 세부 설계사양을 설정하고 광학계를 상세 설계하였다. 프로젝션 광학계와 오목렌즈형 영상결합기 사이에 백색 확산 반사체를 넣어 접은 형태로 구성하여 광학계를 각각 독립적으로 설계하였다. 투사 영상의 전시거리는 약 2m ~ 무한대 까지 조정이 가능하고 관측거리는 1m로 설정하였다. 해상도는 HD($1,280{\times}720$ 화소) 급으로 1 ~ 2화소 까지 인식이 가능하여 각종 문자, 기호를 판독할 수 있다. 또한, 컬러영상 구현이 가능하여 네비게이션 지도, 주간카메라 영상 및 열상카메라 영상 등을 전시할 수 있다.

• Archives of Plastic Surgery
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• 제34권1호
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• pp.37-43
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• 2007

Purpose: Photogrammetry has been introduced as an alternative to direct measurement to obtain facial distances for a variety of anthropometric applications. The aim of this study is to establish morphological and functional value of an eye in Korean youths using specially designed computer software with digital photographic images. Methods: Authors measured anthropometry of an eye in Korean youths 1,449 individuals(622 males, 827 females) and analyzed stastically them. Results: The mean measurements are as follows. The diameter of cornea was $11.6{\pm}0.9mm$ in males and $11.3{\pm}0.9mm$ in females. The vertical dimension of palpebral fissure was $7.4{\pm}1.7mm$ in males and $8.2{\pm}1.6mm$ in females. The intercanthal width was $35.8{\pm}3.2mm$ in males and $34.4{\pm}2.9mm$ in females. The biocular width was $90.4{\pm}5.7mm$ in males and $87.4{\pm}5.3mm$ in females. The endocantion-superior margin of palpebral fissure distance was $12.7{\pm}1.4mm$ in males and $11.6{\pm}1.4mm$ in females. The horizontal dimension of palpebral fissure was $28.5{\pm}2.2mm$ in males and $27.4{\pm}1.9mm$ in females. The slant of palpebral fissure was $10.7{\pm}2.6^{\circ}$ in males and $11.3{\pm}3.0^{\circ}$ in females. The height of upper eyelid was $10.6{\pm}2.3mm$ in males and $10.7{\pm}2.3mm$ in females. The width of double fold was $2.0{\pm}0.7mm$ in males and $1.9{\pm}0.6mm$ in females. A double fold was seen in 21.9% of males and 44.9% of females. The most frequent shape of the double fold was type IV. The most common type of epicanthal fold was type III in both males and females. Conclusion: Photogrammetic measurement of large population using specially designed software could offer reliable data and these data could be useful reference for preoperative consultation, surgical planning and anthropometic study of eye.