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 figure, the terahertz wave emitted by the high-power back-wave oscillator in the electro-optical heterodyne detection type terahertz wave fast two-dimensional imaging device is collimated and focused by the focus, and then enters the first beam splitter. The terahertz wave is divided into two paths. One of the terahertz waves is irradiated on the object to be measured through the scanner, and reflected or scattered by the object to be measured, then reflected by the scanner and the first piece of ITO crystal to the first electro-optical heterodyne detector Above, the other terahertz wave is used as a reference and reflected by the second ITO crystal to the second electro-optical heterodyne detector; the laser output from the mode-locked laser is also divided into two paths through the second beam splitter, one of which passes through the first The ITO crystal is irradiated on the first electro-optical heterodyne detector, and the first terahertz wave heterod...
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