Electro-optical heterodyne detection type THz wave rapid two-dimension imaging apparatus
A technology of heterodyne detection and two-dimensional imaging, applied in the field of terahertz wave application, to achieve the effects of fast image acquisition, high dynamic range, and high working stability
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[0009] As shown in the attached figure, the terahertz wave emitted by the high-power return wave oscillator in the electro-optic heterodyne detection type terahertz wave rapid two-dimensional imaging device is collimated and focused by the focuser, and then enters the first beam splitter The terahertz wave is divided into two paths. One path of terahertz wave is irradiated on the object to be measured through the scanner, and reflected or scattered by the object to be measured, and then reflected to the first electro-optical heterodyne detector through the scanner and the first ITO crystal. On the top, the other terahertz wave is reflected to the second electro-optical heterodyne detector through the second ITO crystal as a reference; the output laser of the mode-locked laser is also divided into two paths through the second beam splitter, and one of the laser beams passes through the first The ITO crystal is irradiated on the first electro-optic heterodyne detector, and genera...
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