Easy focusing with a sweep frequency target

Details Easy focusing with a sweep frequency target Easy focusing with a sweep frequency target

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1309..266h&link_type=abstract

IN: Infrared imaging systems: Design, analysis, modeling, and testing; Proceedings of the Meeting, Orlando, FL, Apr. 16-18, 1990

Physics

Focusing, Infrared Scanners, Raster Scanning, Sweep Frequency, Edge Detection, Image Processing, Image Resolution, Infrared Imagery, Modulation Transfer Function

Scientific paper

Methods for focusing thermal imaging systems are discussed including visual inspection of resolution targets and edges, maximizing the system response to slits or periodic targets, maximizing the response at a particular spatial frequency, and maximizing the output of an edge detection algorithm. Visual inspection of a sweep frequency is found to be the most efficient method for determining focus in raster scanned systems.

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