| US 7,498,577 B2 | ||
| Sensing device employing electromagnetic waves | ||
| Ryoji Kurosaka, Kawasaki (Japan); and Takeaki Itsuji, Hiratsuka (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 14, 2007, as Appl. No. 11/717,714. | ||
| Claims priority of application No. 2006-073612 (JP), filed on Mar. 17, 2006. | ||
| Prior Publication US 2007/0215810 A1, Sep. 20, 2007 | ||
| Int. Cl. G01S 13/00 (2006.01); G01J 1/00 (2006.01) | ||
| U.S. Cl. 250—339.05 [250/341.1; 250/341.8; 250/336.1; 342/179] | 8 Claims |
| 1. A sensing device comprising:
a transmission path through which an electromagnetic wave propagates while radiating to the periphery of the transmission
path, wherein the transmission path includes a line made of a conductive material and the frequency of the electromagnetic
wave is within a range of 30 GHz to 30 THz;
an electromagnetic-wave input unit through which the electromagnetic wave enters the transmission path;
an electromagnetic-wave detector configured to detect the electromagnetic wave propagating through the transmission path;
and
a bent portion provided in the transmission path for allowing an interaction to occur between a test subject and the electromagnetic
wave in the transmission path,
wherein when the test subject is positioned near the bent portion, the electromagnetic-wave detector detects a change in a
state of the electromagnetic wave caused by the interaction occurring between the test subject and the electromagnetic wave
in the bent portion, the detected change providing a basis for obtaining information on the test subject.
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