Editing Phased array (section)

=== Optics ===
{{Main|Phased-array optics}}
Within the visible or infrared spectrum of electromagnetic waves it is possible to construct [[phased-array optics|optical phased arrays]]. They are used in wavelength multiplexers and filters for telecommunication purposes,<ref>P. D. Trinh, S. Yegnanarayanan, F. Coppinger and B. Jalali [http://www.ee.ucla.edu/~oecs/comp_pub/intr_opt/Optics23.pdf Silicon-on-Insulator (SOI) Phased-Array Wavelength Multi/Demultiplexer with Extremely Low-Polarization Sensitivity] {{webarchive|url=https://web.archive.org/web/20051208105830/http://www.ee.ucla.edu/~oecs/comp_pub/intr_opt/Optics23.pdf |date=2005-12-08 }}, ''IEEE Photonics Technology Letters'', Vol. 9, No. 7, July 1997</ref> laser [[beam steering]], and holography. [[Synthetic array heterodyne detection]] is an efficient method for [[multiplexing]] an entire phased array onto a single element [[photodetector]]. The dynamic beam forming in an optical phased array transmitter can be used to electronically raster or vector scan images without using lenses or mechanically moving parts in a lensless projector.<ref name=":0">{{Cite web|url=http://authors.library.caltech.edu/60779/1/06886570.pdf|title=Electronic Two-Dimensional Beam Steering for Integrated Optical Phased Arrays|archive-url=https://web.archive.org/web/20170809130907/http://authors.library.caltech.edu/60779/1/06886570.pdf|archive-date=2017-08-09|url-status=live}}</ref> Optical phased array receivers have been demonstrated to be able to act as lensless cameras by selectively looking at different directions.<ref name=":1">{{Cite web|url=http://chic.caltech.edu/wp-content/uploads/2017/03/Cleo_2017_2D_OPA_V7.pdf|title=An 8x8 Heterodyne Lens-less OPA Camera|archive-url=https://web.archive.org/web/20170713050602/http://chic.caltech.edu/wp-content/uploads/2017/03/Cleo_2017_2D_OPA_V7.pdf|archive-date=2017-07-13|url-status=live}}</ref><ref name=":2">{{Cite web|url=http://chic.caltech.edu/wp-content/uploads/2016/06/CLEO_SI-2016-STu3G.3.pdf|title=A One-Dimensional Heterodyne Lens-Free OPA Camera|archive-url=https://web.archive.org/web/20170722055717/http://chic.caltech.edu/wp-content/uploads/2016/06/CLEO_SI-2016-STu3G.3.pdf|archive-date=2017-07-22|url-status=live}}</ref>