Autofocusing system for microscope having contrast detection mea

Details Autofocusing system for microscope having contrast detection mea Autofocusing system for microscope having contrast detection mea

1988-11-16

1990-07-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

2502017, G01J 120

Patent

active

049452207

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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