서지주요정보
표면 거칠기가 Integrated speckle 의 1차 확률 밀도 함수에 미치는 영향에 관한 연구 = Surface roughness effect of the first order probability density function for integrated speckle
서명 / 저자 표면 거칠기가 Integrated speckle 의 1차 확률 밀도 함수에 미치는 영향에 관한 연구 = Surface roughness effect of the first order probability density function for integrated speckle / 김동우.
저자명 김동우 ; Kim, Dong-Woo
발행사항 [대전 : 한국과학기술원, 1993].
Online Access 제한공개(로그인 후 원문보기 가능)원문

소장정보

등록번호

8003527

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 93001

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The surface roughness effect on the first order probability density function of an integrated speckle pattern, produced in the condition of circular detection aperture and Gaussian scattering spot was theoretically investigated. The mutual intensity $J_A$($X_1$, $Y_1$ ; $X_2$, $Y_2$) containing two roughness parameters, dispersion of surface height $<\phi^2>$ and lateral correlation length $x_c$, was calculated. The exact first order probability density function was analytically derived and numerically calculated by means of the Karhunen-Loeve expansion and fast Fourier transform (FFT). As a diffuse object became smooth, the first order probability density function was changed from negative exponential to sharp peak Gaussian centered around mean intensity. The ranges of the roughness parameters in which the probability density function change significantly was estimated under the experimental condition, λ= 633nm (the frequency of He-Ne laser), z = 0.5m (distance between rough surface and detector) and $r_m$ = 10 μm (the pixel size of CCD). The shape of the probability density function depended mostly on $<\phi^2>$. $<\phi^2>$ ranged from 10 $rad^2$ to 18 $rad^2$ for $r_0$ = 0.3mm (common value of a He-Ne laser beam spot) and from 14 $rad^2$ to 22 $rad^2$ for $r_0$ = 1.5mm. These ranges corresponds to those of surface roughness encountered when lens or mirror is polished by emery powder #100-#1000. This leads to the conclusion that the ranges of the major changes may be adjusted with suitable choices of the parameters, $r_0$ z and λ, and that the surface roughness can be determined with precision if the ranges can be adjusted so as to cover the roughness of the surface we are interested in.

서지기타정보

서지기타정보
청구기호 {MPH 93001
형태사항 [iii], 42 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Dong-Woo Kim
지도교수의 한글표기 : 김수용
지도교수의 영문표기 : Soo-Yong Kim
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 40-42
주제 Laser speckle.
Distribution (Probability theory)
Surface (Technology) --Analysis.
스페클. --과학기술용어시소러스
확률 밀도. --과학기술용어시소러스
표면 거칠기기. --과학기술용어시소러스
QR CODE qr code