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논문 기본 정보

자료유형
학위논문
저자정보

곽도훈 (창원대학교 )

지도교수
정원지
발행연도
2023
저작권
창원대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

초록· 키워드

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Chalcogenide, which is a raw material for lenses, is an amorphous polymer and has thermal properties called glass transition temperature. When the temperature rises above the glass transition temperature, the hard amorphous polymer changes to soft rubber. Using these properties, press molding is performed through a molding machine, and the molding machine goes through sequential processes of ''preheating process'' and ''forming process''. In order to produce a high-quality lens, the raw material is heated to near the glass transition temperature in the ''preheating process'' in which the upper heat block is heated close to it, and then the glass transition temperature is heated in the ''molding process'' where the upper heat block descends and contacts It should be press-formed under higher temperature conditions. Therefore, this study confirms the temperature distribution of lenses and molds through heat transfer analysis in the process of forming infrared aspherical optical lenses for thermal imaging and night vision by molding equipment. As a result of the heat transfer analysis, it was confirmed that the minimum temperature of the mold and lens was heated above the glass transition temperature during the ''preheating process'', and it was confirmed that the minimum temperature of the mold and the lens was pressed at a temperature sufficiently higher than the glass transition temperature during the ''molding process''. Additionally, a thermal flow analysis was performed on the non-Newton fluid whose viscosity changes according to the thermal shear rate. Through this, the formability of chalcogenide glass was identified, and optimal temperature and pressure conditions were identified

목차

LIST OF FIGURES
LIST OF TABLES
NOMENCLATURE
I. 서론
1. 연구 배경
2. 연구 동향
3. 연구 목적 및 내용
II. 이론
1. 적외선
1) 적외선 파장
2) 비구면 적외선 렌즈
3) 적외선 광학계
2. 칼코게나이드
1) 칼코게나이드 구성 및 특성
2) 유리전이온도
3) 비뉴턴유체
III. 해석 방법
1. 금형 소재 및 모델 분석
2.성형챔버 내의 열전달 해석
3. 비뉴텬유체의 열유체 해석
IV. 결론 및 향후 연구 계획
1. 결론
2. 향후 연구 계획
참고문헌
ABSTRACT
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