7 suppliers

Ronchi Gratings

A ronchi grating is a transparent plate ruled with black lines and equal, clear spaces. It is used as a multiple knife-edge for testing a concave mirror.

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Ann Arbor Optical Co. - Hamburg Township, MI

Gage-Line Technology Inc. - Rochester, NY

Graticules Optics Ltd. - Tonbridge, United Kingdom

Opto-Line International Inc. - Wilmington, MA

Plymouth Grating Laboratory Inc. - Carver, MA

Suzhou Jiujon Optics Co. Ltd. - Suzhou, China

Xerox Corp., Imaging Standards - Webster, NY

Glossary

Ronchi grating A transparent plate ruled with black lines and equal, clear spaces. It is used as a multiple knife-edge for testing a concave mirror.
Foucault knife-edge test The Foucault test is performed by moving a knife edge laterally into the image of a small point source. The eye, or a camera, is placed immediately behind the knife edge, and the exit pupil of the system is observed.

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