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HOLOGRAPHIC IMAGING DEVICE AND HOLOGRAPHIC IMAGING METHOD

外国特許コード F200010168
整理番号 (S2018-0961-N0)
掲載日 2020年6月3日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2019JP033982
国際公開番号 WO 2020045584
国際出願日 令和元年8月29日(2019.8.29)
国際公開日 令和2年3月5日(2020.3.5)
優先権データ
  • 特願2018-160899 (2018.8.29) JP
発明の名称 (英語) HOLOGRAPHIC IMAGING DEVICE AND HOLOGRAPHIC IMAGING METHOD
発明の概要(英語) The present invention provides a holographic imaging device and a holographic imaging method, wherein the influence of a refractive index of a cube-type beam coupler constituting an optical system is considered and the performance is enhanced. This holographic imaging device 1 is provided with: a beam coupler 3 composed of a cube-type beam splitter disposed between an object 4 and an image sensor 5; and a calculated reference light hologram generation unit 14 which generates an inline reference light hologram jL that shows a light wave on a hologram surface 50 by performing light propagation calculation, including propagation in the beam coupler, on a spherical wave emitted from a focusing point P2 of inline spherical wave reference light L. The inline reference light hologram jL is a hologram generated through a calculator, and is used for generating an object light hologram g by removing a component of the reference light L from a complex amplitude inline hologram JOL that shows object light O and the inline spherical wave reference light L on the hologram surface 50.
従来技術、競合技術の概要(英語) BACKGROUND ART
Conventionally, such as reflected light or transmitted light to techniques for analyzing light, the intensity of the light and the phase of the data is also referred to as a recording medium such as a photographic plate in the hologram recorded in the holography analysis. Is holographic in recent years, a light receiving element using a semiconductor memory, and the intensity of light acquired as a digital data phase, or a computer generated hologram, the analysis is performed. In this way is the holography, referred to as digital holography.
In the digital holography, the hologram data acquisition and processing of high speed and high accuracy in order to achieve a variety of techniques have been proposed, which imaging applications. For example, the one-shot the hologram recorded at the spatial frequency filtering and the spatial heterodyne modulation data and is applied, the complex amplitude of the in-line hologram for reproducing the object image at a high speed and accurately generating digital holography has been known (for example, see Patent Document 1).
In order to solve the problem of the conventional optical microscope, by using holography, the imaging lens without using a large numerical aperture of the object light of a method of recording the one-shot, and the recorded plane wave object beam expanded by the computer 3 high-resolution three-dimensional image accurately reproducing the known method (for example, see Patent Document 2). According to this method, a distortion-free high-resolution three-dimensional moving image can be recorded or reproduced 3 utilizes three-dimensional microscope lens 3 are realized. In such a microscope, because imaging lens is not used, in a conventional optical microscope, the lens and the imaging medium under the influence of the problem can be solved.
In addition, the internal structure of the biological tissue and cells in culture in order to measure a high resolution, and a wavelength swept laser light reflection type microscope lens-less holographic high-resolution tomographic imaging method is used has been known (for example, see Patent Document 3).
Further, different incident direction of illumination light emitted from an object is irradiated with a large numerical aperture of the object light, the incident direction of illuminating light is recorded as the hologram data for each, of these plurality of large numerical aperture combined with a single hologram of the hologram, based on the number of synthetic aperture greater than 1 in the method of reproducing the object light has been known (for example, see Patent Document 4). According to this method, typically having a resolution that exceeds the diffraction limit of the ultra-high resolution three-dimensional microscope 3 can be realized.
In addition, the accuracy of the optical recording and optical recording by one-shot digital holography of the plane wave expansion using known holographic ellipsometry device (for example, see Patent Document 5). According to the ellipsometry device, illumination light including the number of non-parallel angle of incidence of the incident light with reflected light by the hologram data can be recorded at the same time, a wave number vector corresponds to one incident angle Ψ angle ellipsometry for each number, Δ can be obtained, the measurement efficiency can be improved.
In addition, a cube-type beam splitter in one of the diverging beam is divided into reference light and illumination light, the beam splitter is used as a beam combiner, and the object light and reference light and configured to be coupled to, lens-less holographic microscope has been known a small (for example, see Patent Document 6).
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • UNIVERSITY OF HYOGO
  • 発明者(英語)
  • SATO KUNIHIRO
  • SHIMODA KENSAKU
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG

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