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The influence of nonparaxiality on the spectral behavior in Young's experiment illuminated by partially coherent light 被引量:1
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作者 赵光普 吕百达 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第8期3466-3472,共7页
Starting from the Rayleigh-Sommerfeld diffraction integral, this paper studies the spectral behavior in Young's experiment illuminated by nonparaxial partially coherent light and compares with the paraxial case, wher... Starting from the Rayleigh-Sommerfeld diffraction integral, this paper studies the spectral behavior in Young's experiment illuminated by nonparaxial partially coherent light and compares with the paraxial case, where the influence of nonparaxiality of partially coherent light on the spectral shifts and spectral switches is stressed. It is shown that there is a spectral shift in the nonparaxial case relative to the paraxial one and the critical position changes, at which the spectral switch occurs. The ratio of the waist width to the central wavelength ω0/λ0 and relative spatial correlation length △ affect the spectral difference. The smaller ω0/λ0 is, the larger the difference between the nonparaxial and paraxial results appears. The effect of relative spatial correlation length △ is relatively small. 展开更多
关键词 nonparaxial beams Young's experiment spectral shift and spectral switch partially coherent light
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MEASURING DISPLACEMENT FIELDS OF CURVED SURFACE BY MOIRE INTERFEROMETRY OF PARTIAL COHERENT LIGHT
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作者 钟国成 王兵 +1 位作者 蒋小林 戴福隆 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 1993年第2期177-184,共8页
This paper presents a method to measure the in-plane displacement fields of curved surface by moire interferometry of partial coherent light.The method has the following advantages:simple optical system,no requirement... This paper presents a method to measure the in-plane displacement fields of curved surface by moire interferometry of partial coherent light.The method has the following advantages:simple optical system,no requirement on vibration isolation,high sensitivity,large measuring range,high contrast of inter ference fringes and availability to in-situ structural testing.The present paper also gives theoretical analysis of the method and the formulas of light intensity and displacement field,and introduces a replication technique to form a high frequency reflectance grating on the curved surface.The experiments achieved the measurement of the surface displacement field of a cylindrical shell—the simultaneous circumferential,axial and 45° displacement fields.The torsional test data for surface displacement of a circular bar agree well with the theoretical result. 展开更多
关键词 Moire interferometry partial coherent light circumferential displacement axial displacement
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Spectral anomalies and spectral switches of partially coherent and polychromatic light diffracted at an aperture 被引量:1
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作者 Lü Baida1, 3 & PAN Liuzhan1, 2 1. Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China 2. Department of Physics, Luoyang Normal College, Luoyang 471022, China 3. State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China Correspondence should be addressed to L Baida (email: badalu@scu.edu.cn) Received July 10, 2003 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2004年第1期24-35,共12页
Based on the propagation theory of partially coherent light in the space-frequency domain, the anomalous spectral behavior and spectral switches in the far field of partially coherent and polychromatic light diffracte... Based on the propagation theory of partially coherent light in the space-frequency domain, the anomalous spectral behavior and spectral switches in the far field of partially coherent and polychromatic light diffracted at an aperture are studied. It is shown that, as compared with spatially fully coherent and polychromatic light whose spectral anomalies are induced only by aperture diffraction, the spectral anomalies and spectral switches of partially coherent and polychromatic light depend on the aperture diffraction, spatial correlationβ and bandwidth of the original spectrum. Detailed numerical calculations are made to illustrate the behavior of spectral switches of partially coherent and polychromatic light, and the results for spatially fully coherent and polychromatic light are treated as a special case ofβ=1 and included in our theory. 展开更多
关键词 spectral anomaly spectral switch partially coherent and polychromatic light far field aperture diffraction
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