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칼코게나이드 유리 소재의 PGM 가공 렌즈를 사용한 저가의 적외선 광학계 설계와 제작
오승은,이선규,최중규,송국현,백종식,Oh, Seung Eun,Lee, Sun Kyu,Choi, Joong Kyu,Song, Kook Hyun,Baek, Jong Sik 한국광학회 2012 한국광학회지 Vol.23 No.4
본 논문에서는 적외선 광학장비의 가격 경쟁력을 확보하고자 상대적으로 저렴한 비용으로 제작이 가능한 PGM(Precision Glass Molding) 가공 렌즈로 구성된, 비냉각형 검출기용 적외선 광학계를 설계 및 제작하였다. PGM 가공이 가능하도록 광학계의 모든 렌즈에 칼코게나이드 유리(Chalcogenide Glass) 소재를 사용하였으며, 자체 비열화가 구현되도록 설계하였다. 또한 기존 가공법인 SPDT(Single Point Diamond Turning) 방법으로 제작된 렌즈로, 동일한 광학계를 구성하여 PGM 가공 렌즈의 성능 측정에 사용하였다. 제작된 두 광학계의 변조전달함수(MTF) 측정 결과와 실제 영상의 촬영 결과를 비교하여 분석한 결과, 가공 방법에 따른 렌즈의 성능 차이는 그리 크지 않음을 확인할 수 있었다. 따라서 향후 PGM 가공 렌즈의 사용이 증가하면, 적외선 광학장비의 가격 경쟁력이 향상될 것으로 기대된다. In this paper, for low cost infrared optical equipment, we design and fabricate an infrared optical system for an uncooled detector using PGM(Precision Glass Molding) lenses. The designed infrared optical system has a good athermalization, and the material of all of its lenses is a chalcogenide glass suitable for the PGM method. In addition, we also fabricate the same infrared optical system using SPDT(Single Point Diamond Turning) lenses in order to measure the optical performance of PGM lenses. We measure the MTF(Modulation Transfer Function) of the two infrared optical systems which use the PGM lenses and the SPDT lenses. And then we compare and analyze the images of them both. As a result, we find that they have only a very small difference in optical performance. If the use of PGM lenses increases, we expect to reduce the cost of infrared optical equipment.
오승은,김순례,Oh, Seung-Eun,Kim, Soon-Lae 한국가정간호학회 2007 가정간호학회지 Vol.14 No.2
Purpose: This thesis focuses on researching the burden of the Home Health Care that the Family Care-givers have. Method: This study had been conducted for the duration of 3 consecutive months from January 2006 to March 2006 and had investigated 120 person registered as the Home Health Care Clients to a University Hospital located in Incheon City. The thesis adopted the 'feeling of burden' measuring method jointly developed by Seo, Mi-Hye and Oh, Ga-Sil(1993), and FACES-III(Family Adaptability Cohesion Evaluation) developed by Olson(1985) etc. translated by Kim, Yun-Hee(1989) as the measuring method for Family Function. Result: The overall Health Status of the Home Health Care Clients was 2.18 point of average out of 3 point, where as 1.83 for Activities of Daily living and 1.98 for Vital sign, which are below the average. In the mean time, the Competence for Modified Barthel Index marked 30.88 point out of the full mark. The analyzed result of the burden that the family members have was 3.43 point of average out of 5 point which shows that the interviewee feel that they are considerable burden to their families. When it comes to 'the Burden to the family members' and 'the Function of the family' according to the characteristics of the patient, the result shows statistically significant differences, which are varied according to gender, the relationship between the care-givers and the patients. When it comes to the Family Cohesion, the difference was examined as 'statistically significant' according to the Academic background of the patients and the relationship between the patients and the interviewee.(p<0.05). The result also suggests that there exists 'Negative correlation' among the level of patients' health status, the Family Cohesion and the Family Burden. Conclusion: From the result of this study stated above, this thesis is strongly insisting that there is an urgent need for us to develop a health care mediation program, which could eventually reduce the burden of home health care that the patients' family have. At the same time, a follow-up research to prove the effect of the program is imminent.