서지주요정보
Modulation transfer function 의 측정에 의한 video camera system 의 성능 평가 = Assessment of video camera system by modulation transfer function measurement
서명 / 저자 Modulation transfer function 의 측정에 의한 video camera system 의 성능 평가 = Assessment of video camera system by modulation transfer function measurement / 박홍철.
저자명 박홍철 ; Park, Hong-Chol
발행사항 [서울 : 한국과학기술원, 1985].
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소장정보

등록번호

4103330

소장위치/청구기호

학술문화관(문화관) 보존서고

MAP 8515

SMS전송

도서상태

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반납예정일

초록정보

Performance of video camera system (zoom lens, image tube, and pre-amp) is investigated by MTF measurement. 3 pair bar pattern which has 7 spatial frequences is used in the measurement of MTF for the total system ($\mid{\Psi_{total}}\mid$). The test pattern gives square wave input to the video camera system under test. As a sinusoidal wave input only gives correct MTF data, the measured MTF data obtained from the square wave input pattern is corrected. The MTF of zoom lens ($\mid{\Psi_{optical} }\mid$) is measured by slit image scanning method, and finally the MTF of electrical system, image tube and pre-amp ($\mid{\Psi_{electrical}}\mid$) is calculated using the following equation; $\mid{\Psi_{electrical}}\mid = \mid{\Psi_{total}}\mid / \mid{\Psi_{optical}}\mid$ The cutoff frequency of the total system is 12 lp/mm, and in the region of spatial frequency from 0 to 7 lp/mm, the system shows good performance, yet behind that frequency the performance falls off abruptly. The abrupt falling-off of the performance is found mainly due to the low level frequency characteristics of the electrical part of the system, which has good spatial frequency response only up to 7 lp/mm. The MTF of the zoom lens, measured by knife-scanning of the line spread function, falls slowly to zero level at the spatial frequency of 24 lp/mm. In conclusion, the electrical part of the video camera system over-rule the entire performance of the video camera system, and adequate MTF balancing between optical part and electrical part is important in the system design.

서지기타정보

서지기타정보
청구기호 {MAP 8515
형태사항 iv, 77 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Hong-Chol Park
지도교수의 한글표기 : 이상수
지도교수의 영문표기 : Sang-Soo Lee
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 수록
주제 Camcorders.
Zoom lenses.
변조 전달 함수. --과학기술용어시소러스
비디오 카메라. --과학기술용어시소러스
줌 렌즈. --과학기술용어시소러스
Transfer functions.
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