Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2007-12-12
2010-12-28
Hannaher, Constantine (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
Reexamination Certificate
active
07858940
ABSTRACT:
An information acquisition apparatus includes a pulse generator9, a detector10, a first delay unit15, a second delay unit16and a computation unit. The pulse generator9is excited by a first laser beam to generate a terahertz wave in the form of a pulse. The detector10is excited by a second laser beam coherent to the first laser beam to detect the terahertz wave from object2that is irradiated with the pulse of the terahertz wave. The first delay unit15changes the delay time in such a way that the detector10can detect the pulse signal of the terahertz wave from the object2. The second delay unit16changes the delay time by not greater than the temporal width of the pulse signal detected by the detector10. The computation unit computationally determines the information on the temporal position of the peak of the pulse signal of the terahertz wave from the object2according to the information of the signal detected by the detector10when the delay time is changed by the second delay unit within the delay time of the first delay unit.
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Int'l Search Report mailed Mar. 28, 2008, for International Application No. PCT/JP2007074353, not a publication.
Written Opinion of the International Searching Authority mailed Mar. 28, 2008, for International Application No. PCT/JP2007/074353, not a publication.
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Hannaher Constantine
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