Title:
SIGNAL LIGHT DETECTION DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2010/146817
Kind Code:
A1
Abstract:
An electric signal generated by a photoelectric conversion element (104) is inputted into a comparator (120). The comparator (120) determines whether or not an electric signal outputted by an amplifier (110) is greater than or equal to a reference voltage and outputs a high signal when the electric signal is greater than or equal to the reference voltage. A reference voltage modification unit (130) raises the reference voltage once the comparator (120) determines that the electric signal is greater than or equal to the reference voltage and after a predetermined amount of time has elapsed. On the basis of the pulse width, which is the period from when the electric signal equals or rises above the reference voltage to when the electric signal equals or drops below the reference voltage, a signal processing device corrects the rising timing which is when the electric signal became greater than the reference voltage, thereby calculating the timing with which a signal light began to enter a photoelectric conversion unit (100).
Inventors:
TAKAHASHI HIROYUKI (JP)
USUKI YOSHIYUKI (JP)
KAMADA KEI (JP)
USUKI YOSHIYUKI (JP)
KAMADA KEI (JP)
Application Number:
PCT/JP2010/003907
Publication Date:
December 23, 2010
Filing Date:
June 11, 2010
Export Citation:
Assignee:
UNIV TOKYO (JP)
FURUKAWA CO LTD (JP)
TAKAHASHI HIROYUKI (JP)
USUKI YOSHIYUKI (JP)
KAMADA KEI (JP)
FURUKAWA CO LTD (JP)
TAKAHASHI HIROYUKI (JP)
USUKI YOSHIYUKI (JP)
KAMADA KEI (JP)
International Classes:
G01T1/17; G01T1/20
Domestic Patent References:
| WO2008040384A1 | 2008-04-10 |
Foreign References:
| JP2003004853A | 2003-01-08 | |||
| JPH11231058A | 1999-08-27 | |||
| JP2007187546A | 2007-07-26 |
Other References:
SANG YEOL KIM ET AL.: "Pulse-shape compensation of time walk using a multi-threshold technique", NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION A, vol. 414, 1998, pages 372 - 385, XP004139181
XUZONG LIU ET AL.: "A time-over-threshold technique for PMT signals processing", NUCLEAR SCIENCE AND TECHNIQUES, vol. 18, 2007, pages 164 - 171, XP022936281
XUZONG LIU ET AL.: "A time-over-threshold technique for PMT signals processing", NUCLEAR SCIENCE AND TECHNIQUES, vol. 18, 2007, pages 164 - 171, XP022936281
Attorney, Agent or Firm:
HAYAMI, SHINJI (JP)
Shinji Hayami (JP)
Shinji Hayami (JP)
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