Title:
OBSERVATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/136381
Kind Code:
A1
Abstract:
Disclosed is an observation device which can acquire a phase image of a moving object at high speed and high accuracy even when using a photodetector in which the readout speed per pixel is low. An observation device (1) is provided with a light supply unit (10), a first modulator (20), a second modulator (30), a lens (40), a beam splitter (41), a photodetector (46), and a computation unit (50). The lens (40) inputs scattered light generated by a moving object (2) and generates a Fourier transform of the object (2). The photodetector (46) outputs data at each time point about each position in a u-direction, said data showing the sum of a v-direction of data which changes temporally at a frequency corresponding to the Doppler shift amount of the light which reaches each position of a light receiving surface across the lens (40). The computation unit (50) acquires an image of the subject (2) on the basis of the output of the photodetector (46).
Inventors:
IWAI HIDENAO (JP)
FUJIMOTO MASATOSHI (JP)
FUJIMOTO MASATOSHI (JP)
Application Number:
PCT/JP2011/060561
Publication Date:
November 03, 2011
Filing Date:
May 02, 2011
Export Citation:
Assignee:
HAMAMATSU PHOTONICS KK (JP)
IWAI HIDENAO (JP)
FUJIMOTO MASATOSHI (JP)
IWAI HIDENAO (JP)
FUJIMOTO MASATOSHI (JP)
International Classes:
G02B27/52; G01J9/02; G01N21/45
Foreign References:
| JP2003527577A | 2003-09-16 | |||
| JPH08206086A | 1996-08-13 | |||
| JP3471556B2 | 2003-12-02 |
Other References:
Y. SASAKI ET AL.: "Fundamental imaging properties of transillumination laser CT using optical fiber applicable to Bio-Medical Sensing", IEEE SENSORS JOURNAL, vol. 3, no. 5, October 2003 (2003-10-01), pages 658 - 667, XP011101914
F. LE CLERC ET AL.: "Numerical heterodyne holography with two-dimensional photodetector arrays", OPTICS LETTERS, vol. 25, no. 10, 2000, pages 716 - 718
F. LE CLERC ET AL.: "Numerical heterodyne holography with two-dimensional photodetector arrays", OPTICS LETTERS, vol. 25, no. 10, 2000, pages 716 - 718
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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Claims: