Optical beam steering using phased array technology

1997 ◽  
Author(s):  
Paul F. McManamon ◽  
Edward A. Watson
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Optical Beam ◽  
Array Technology

Ultra-fast speed, low grating lobe optical beam steering using unequally spaced phased array technique

2007 ◽  
Vol 270 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Stuart (Shizhuo) Yin ◽  
Jae Hun Kim ◽  
Fei Wu ◽  
Paul Ruffin ◽  
Claire (Fang) Luo
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Optical Beam ◽  
Fast Speed ◽  
Unequally Spaced ◽  
Grating Lobe

Review of Ultrasonic Phased Arrays for Pressure Vessel and Pipeline Weld Inspections

2005 ◽  
Vol 127 (3) ◽  
pp. 351-356 ◽  
Author(s):  
Michael Moles ◽  
Noël Dubé ◽  
Simon Labbé ◽  
Ed Ginzel
Keyword(s):  
Pressure Vessel ◽  
Phased Array ◽  
Beam Steering ◽  
Ultrasonic Inspection ◽  
Time Data ◽  
Construction Costs ◽  
Array Technology ◽  
Weld Profile ◽  
Asme Code ◽  
Pulse Echo

Major improvements in weld inspection are obtained using Phased Array technology with capability for beam steering, electronic scanning, focusing, and sweeping the ultrasonic beams. Electronic scanning is much faster than raster scanning, and can optimize angles and focusing to maximize defect detection. Pressure vessel (PV) inspections typically use “top, side, end” or “top, side, TOFD” views, though other imaging is possible. Special inspections can be performed, e.g., for specific defects, or increased coverage. Defects can be sized by pulse-echo as per code, by time-of-flight Diffraction or by back diffraction. New PV inspection codes, particularly ASME Code Case 2235, permit the use of advanced ultrasonic inspection techniques. Pipeline girth weld inspections use a unique inspection approach called “zone discrimination,” and have their own series of codes. While similar equipment is used in pipeline as in PV inspections, the pipeline philosophy is to tailor the inspection to the weld profile and predicted lack of fusion defects. Pipeline displays are specifically designed for near real-time data analysis. Both ASME CC 2235 and the pipeline codes permit the use of Fitness-For-Purpose, which reduces construction costs. Overall, phased array systems meet or exceed all PV and pipeline codes.

scholarly journals Sub-wavelength-pitch silicon-photonic optical phased array for large field-of-regard coherent optical beam steering

2019 ◽  
Vol 27 (3) ◽  
pp. 1929 ◽  
Author(s):  
Yu Zhang ◽  
Yi-Chun Ling ◽  
Kaiqi Zhang ◽  
Cale Gentry ◽  
David Sadighi ◽  
...  
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Optical Beam ◽  
Large Field ◽  
Silicon Photonic ◽  
Optical Phased Array ◽  
Sub Wavelength

scholarly journals On the performance of optical phased array technology for beam steering: effect of pixel limitations

2020 ◽  
Vol 28 (21) ◽  
pp. 31637
Author(s):  
Antonio Cala’ Lesina ◽  
Dominic Goodwill ◽  
Eric Bernier ◽  
Lora Ramunno ◽  
Pierre Berini
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Array Technology ◽  
Optical Phased Array
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