(19)
(11) EP 1 930 714 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A2)

(48) Corrigendum issued on:
06.08.2008 Bulletin 2008/32

(43) Date of publication:
11.06.2008 Bulletin 2008/24

(21) Application number: 07122261.6

(22) Date of filing: 04.12.2007
(51) International Patent Classification (IPC): 
G01N 21/35(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 05.12.2006 JP 2006327801

(71) Applicants:
  • CANON KABUSHIKI KAISHA
    Ohta-ku Tokyo 146-8501 (JP)
  • RIKEN
    Wako-shi, Saitama-ken (JP)

(72) Inventors:
  • OUCHI, Toshihiko c/o CANON KABUSHIKI KAISHA
    Ohta-ku, Tokyo 146-8501 (JP)
  • KASAI, Shintaro c/o CANON KABUSHIK KAISHA
    Ohta-ku, Tokyo 146-8501 (JP)
  • YONEYAMA, Haruko c/o RIKEN
    Wako-shi, Saitama (JP)
  • YAMASHITA, Masatsugu c/o RIKEN
    Wako-shi, Saitama (JP)

(74) Representative: TBK-Patent 
Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Detection method using electromagnetic wave and detection apparatus


(57) A detection apparatus includes a sample holding section, an irradiation means, a detection means, a calculation means, and an evaluation means. The irradiation means irradiates a substance held in the sample holding section with a THz wave. The detection unit detects a THz wave passed through or reflected from the substance. The calculation unit determines a frequency dependence of a property of the substance with respect to the irradiated THz wave and then calculates a slope of a straight line or a slope of a straight line obtained by straight-line approximation of the frequency dependence of the property of the substance. The evaluation unit evaluates the state change of the substance by comparing a previously-obtained slope of a straight line of the frequency dependence of the property of the substance in a standard state and the slope of the straight line of the substance calculated.