We proposed a novel interference elimination method for CW-THz reflection imaging. Based on the study of interference mechanism in the imaging window, inverse processing was proposed to realize the interference elimination. Theoretical calculation showed that the interference phenomenon was closed related to the characteristics of imaging window. The refractive index and thickness of the window were the two main factors for the interference. Moreover, polarization was also taken into consideration for the CW-THz reflection imaging because the reflectivities of the s and p polarized waves were different from each other. This method was applied in different imaging systems for the demonstration of its feasibility. The high resistivity float-zone silicon (HRFZ-Si) plate was employed as the imaging window in the normal incidence system with a terahertz quantum cascade laser (THz-QCL) operating at 4.3THz. The oblique system employed quartz plate as the imaging window with an optical pumped THz laser operating at 2.52THz. Pork and liquid samples of water and edible oils were chosen as the imaging samples to demonstrate the interference elimination method.
In this paper, a novel strategy for diagnosis of bTBI is proposed by measuring terahertz (THz) spectroscopy of serum in a rat model. A compressed air-driven shock wave generator was used to establish bTBI model of rats. It was validated by a neurological deficit assessment method. The spectral differences of serum for different degrees of bTBI rats have been demonstrated by THz time-domain spectroscopy (THz-TDS). Moreover, based on the THz spectra of serum, the principal component analysis (PCA) and support vector machine (SVM) were performed to automatically identify the degrees of bTBI. The results indicate that THz spectroscopy could provide a sensitive, rapid and label-free diagnosis method for bTBI.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.