Structure of lens combination for optical fiber fine displacement detecting system
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United States of America Patent
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Sep 8, 1992
Grant Date -
N/A
app pub date -
Nov 8, 1990
filing date -
Nov 8, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lens combination set in front of an optical fiber terminal head of an optical fiber fine displacement detecting system to focus a real image of the optical fiber terminal head so as to extend the mounting range of the head relative to the object in detection and avoid any possible damage due to collision of the object with the head. The lens combination focuses the light rays from the optical fiber terminal head to form a real image outside the lens combination. The reflected light rays from the object mounted around the real image are focused by the lens combination and sent back to the detecting system through the optical fiber terminal head. Therefore, sufficient safety range is obtained between the lens combination and the object in detection without affecting the normal operation of the detecting system.
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