Title:
THREE-DIMENSIONAL OBJECT INFORMATION MEASURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/147473
Kind Code:
A1
Abstract:
A three-dimensional object information measuring device (1) is provided with: a linearly polarized light converting unit (22) which converts object light arriving from an object into linearly polarized light; a shearing interferometer (2) which causes the object light to undergo shearing interference; a circularly polarized light converting unit (28) which converts vertically polarized light and horizontally polarized light in interference light obtained by means of the shearing interferometer into circularly polarized light; an interference fringe acquiring unit (3) which records the circularly polarized light by means of a single image capture; and a calculating unit (4) which computes complex amplitude information of the object from the image recorded by the interference fringe acquiring unit (3). In the recorded image, the phase differs depending on the pixel. The calculating unit (4) is provided with: an extracting unit (41) which extracts the pixels from the recorded image by phase, and generates a plurality of sets of extracted data comprising pixels having the same phase and pixels having a missing pixel value; an interpolating unit (42) which generates a plurality of sets of interpolated data approximating a plurality of interference images having mutually different phases, by subjecting each of the plurality of sets of extracted data to pixel interpolation; and a computing unit (43) which computes the complex amplitude information from the plurality of sets of interpolated data.
Inventors:
AWATSUJI YASUHIRO (JP)
SHINOMURA MASATO (JP)
SHINOMURA MASATO (JP)
Application Number:
PCT/JP2018/005604
Publication Date:
August 16, 2018
Filing Date:
February 09, 2018
Export Citation:
Assignee:
NAT UNIV CORP KYOTO INST TECHNOLOGY (JP)
International Classes:
G01B11/24; G01B9/021; G02B5/30; G03H1/04; G03H1/22
Domestic Patent References:
| WO2014054446A1 | 2014-04-10 |
Foreign References:
| JP2015031658A | 2015-02-16 | |||
| JP2010151590A | 2010-07-08 | |||
| JP2005283683A | 2005-10-13 | |||
| JP2007212455A | 2007-08-23 | |||
| JPS4874250A | 1973-10-06 | |||
| EP2535679A1 | 2012-12-19 |
Other References:
WALLACE, JOHN: "Coping with square opening by algorithm of radial shearing interferometer", LASER FOCUS WORLD JAPAN, November 2015 (2015-11-01), pages 17
WATANABE, KAHO ET AL.: "Recording incoherent off-axis hologram by rotational shearing interferometer", EXTENDED ABSTRACTS OF THE 76TH JSAP AUTUMN MEETING, vol. 76, 31 August 2015 (2015-08-31)
WATANABE, KAHO ET AL.: "Recording incoherent off-axis hologram by rotational shearing interferometer", EXTENDED ABSTRACTS OF THE 76TH JSAP AUTUMN MEETING, vol. 76, 31 August 2015 (2015-08-31)
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
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