ASI autofocus system works with most normal microscope objectives

March 27, 2012

The Continuous Reflective Interface Sample Placement (CRISP) autofocus system is designed to compensate for thermal and other factors that may cause a sample to drift out of focus over time.

LFW Staff

The Continuous Reflective Interface Sample Placement (CRISP) autofocus system is designed to compensate for thermal and other factors that may cause a sample to drift out of focus over time. It can also maintain a particular focal point while scanning a sample in X-Y. It mounts onto a standard C-mount port and works with most normal microscope objectives.
Applied Scientific Instrumentation
Eugene, OR
[email protected]

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PRESS RELEASE

CRISP Autofocus System

The Continuous Reflective Interface Sample Placement (CRISP) projects the image of a mask illuminated with an IR LED into the sample plane. Only one half of the objective pupil is illuminated. This means that the point spread function of the objective is highly skewed, so that the reflected image of the mask will move laterally as focus is changed. CRISP detects this lateral motion of the LED image to obtain a focus error that is used to close the focus positioning loop.

The CRISP mounts onto any microscope's standard C-mount port and maintains ideal focus for days.

About the Author

LFW Staff

Published since 1965, Laser Focus World—a brand and magazine for engineers, researchers, scientists, and technical professionals—provides comprehensive global coverage of optoelectronic technologies, applications, and markets. With 80,000+ qualified print subscribers in print and over a half-million annual visitors to our online content, we are the go-to source to access decision makers and stay in-the-know.