.png){kind=icon}
.png){kind=icon}
Return
THz holography in reflection using a high resolution microbolometer array
.png){kind=icon}
OA
AI
DOI：10.1364/OE.23.010957.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
We demonstrate a digital holographic setup for Terahertz imaging of surfaces in reflection. The set-up is based on a high-power continuous wave (CW) THz laser and a high-resolution (640 x 480 pixel) bolometer detector array. Wave propagation to non-parallel planes is used to reconstruct the object surface that is rotated relative to the detector plane. In addition we implement synthetic aperture methods for resolution enhancement and compare Fourier transform phase retrieval to phase stepping methods. A lateral resolution of 200 mu m and a relative phase sensitivity of about 0.4 rad corresponding to a depth resolution of 6 mu m are estimated from reconstructed images of two specially prepared test targets, respectively. We highlight the use of digital THz holography for surface profilometry as well as its potential for video-rate imaging. (C) 2015 Optical Society of America
Keywords:
DIGITAL HOLOGRAPHY
ANGULAR SPECTRUM
TERAHERTZ
RECONSTRUCTION
AMPLITUDE
DIFFRACTION
PLANES
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
3.3
Papers:
6.1W
Citations:
14.3W