Passive 77 GHz millimeter-wave sensor based on optical upconversion.

A passive millimeter-wave (mmW) sensor operating at a frequency of 77 GHz is built and characterized. The sensor is a single pixel sensor that raster scans to create an image. Optical upconversion is used to convert the incident mmW signal into an optical signal for detection. Components were picked to be representative of a single element in a distributed aperture system. The performance of the system is analyzed, and the noise equivalent temperature difference is found to be 0.5 K (for a 1 s integration time) with a diffraction limited resolution of ~8 mrad. Representative images are shown that demonstrate the phenomenology associated with this spectrum.

[1]  Dennis W. Prather,et al.  Development and characterization of LiNbO3 electro-optic phase modulator at 220 GHz for millimeter-wave imaging system , 2011, Security + Defence.

[2]  Graham M. Brooker,et al.  Seeing through dust and water vapor: Millimeter wave radar sensors for mining applications , 2007, J. Field Robotics.

[3]  J. Wenger,et al.  Automotive radar - status and perspectives , 2005, IEEE Compound Semiconductor Integrated Circuit Symposium, 2005. CSIC '05..

[4]  J. Murakowski,et al.  Radiometric Millimeter-wave detection via optical upconversion and carrier suppression , 2005, IEEE Transactions on Microwave Theory and Techniques.

[5]  R Appleby,et al.  Passive millimetre–wave imaging and how it differs from terahertz imaging , 2004, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[6]  Joseph N Mait,et al.  Millimeter-wave compressive holography. , 2010, Applied optics.

[7]  Eugene Serabyn,et al.  Atmospheric transmission at microwaves (ATM): an improved model for millimeter/submillimeter applications , 2001 .

[8]  Dennis W. Prather,et al.  Passive millimeter wave imaging using a distributed aperture and optical upconversion , 2010, Security + Defence.

[9]  David A. Wikner,et al.  Polarimetric passive millimeter-wave sensing , 2001, SPIE Defense + Commercial Sensing.

[10]  Thomas E. Hall,et al.  Three-dimensional millimeter-wave imaging for concealed weapon detection , 2001 .

[11]  Roger Vounckx,et al.  Multispectral illumination and image processing techniques for active millimeter-wave concealed object detection. , 2008, Applied optics.

[12]  W. N. Hardy,et al.  Precision temperature reference for microwave radiometry (Short Papers) , 1973 .

[13]  J. B. Snider,et al.  Ground-based radiometric observations of atmospheric emission and attenuation at 20.6, 31.65, and 90.0 GHz: a comparison of measurements and theory , 1990 .

[14]  Duncan A. Robertson,et al.  Compact real-time (video rate) passive millimeter-wave imager , 1999, Defense, Security, and Sensing.

[15]  David A. Wikner.  Millimeter-wave propagation through a controlled dust environment , 2007, SPIE Defense + Commercial Sensing.

[16]  Hans J. Liebe,et al.  MPM—An atmospheric millimeter-wave propagation model , 1989 .

[17]  Daniel G. Mackrides,et al.  Comparison of diurnal contrast changes for millimeter-wave and infrared imagery. , 2010, Applied optics.

[18]  Christopher Arnim Schuetz.  Optical techniques for millimeter -wave detection and imaging , 2007 .

[19]  Carl E. Halford,et al.  Laboratory measurement of sampled infrared imaging system performance , 1999 .

[20]  Andrew R. Harvey,et al.  Coherent optical beam forming with passive millimeter-wave arrays , 1999 .

[21]  Larry Yujiri.  Passive Millimeter Wave Imaging , 2006, IMS 2006.