intraoptical light sighting system

intraoptical light sighting system

[‚in·trə′äp·tə·kəl ′līt ¦sīd·iŋ ‚sis·təm]
(optics)
A target sighting system used with infrared pyrometers in which a visible, pulsating light is directed through the infrared optics, and gives an indication of the exact field of view, not just the centerpoint.
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