Autofocusing system for microscope having contrast detection means
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United States of America Patent
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Jul 31, 1990
Grant Date -
N/A
app pub date -
Nov 16, 1988
filing date -
Nov 16, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An autofocusing system for a microscope is disclosed. An autofocus target is placed between a colliminating lens and a relay lens of the microscope. The autofocus target contains a pattern of dark areas which are projected onto a specimen and reflected into a CCD camera array. The focus of the microscope is adjusted such that the variation in intensity of light through the pattern is maximized.
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