H
Hirofumi Fujiwara
Researcher at Hokkaido University
Publications - 12
Citations - 67
Hirofumi Fujiwara is an academic researcher from Hokkaido University. The author has contributed to research in topics: Holography & Ruby laser. The author has an hindex of 4, co-authored 12 publications receiving 62 citations.
Papers
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Effects of Spatial Coherence on Fourier Imaging of a Periodic Object
TL;DR: In this article, the formation and contrast of Fourier images of a periodic object, especially a sinusoidally transparent object, are investigated under partially coherent illumination, and it becomes apparent that the spatial coherence of light affects seriously the contrast and positions of the Fourier image planes.
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On the van Cittert-Zernike theorem
TL;DR: In this paper, the authors re-examine the van Cittert-Zernike theorem and extend it to the spatial coherence at any two points of a light field illuminated by an incoherent extended source having a nonuniform intensity distribution.
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Some Effects of Spatial and Temporal Coherence in Holography
TL;DR: In this paper, the authors investigated the systematic treatment of image formation in two-beam Fresnel holography from the viewpoint of spatial coherence and influence of temporal coherence in Fraunhofer holographic models.
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Some Effects of Spatial and Temporal Coherence on In-line Fraunhofer Holography
Hirofumi Fujiwara,Kazumi Murata +1 more
TL;DR: In this paper, the authors theoretically and experimentally treated image formation by in-line Fraunhofer holography from a viewpoint of coherence theory, and showed that the effective size of the hologram is reduced by partially coherent light and the reconstructed image is broadened by a degree of spatial and temporal coherence of the illuminating light.
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A new holographic measurement of frequency sweeping of the output from a Q-switched ruby laser
TL;DR: In this article, the frequency sweep of the output from a Q-switched ruby laser is investigated by using a holographic technique of a moving object, assuming that the chirp rate of the frequency sweeps is linear in time.