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Foucault Tester | Edmund Optics
- https://www.edmundoptics.com/p/foucault-tester/24191/
- The Foucault knife-edge tester actually measures the radius of curvature of zones on the mirror. The blade cuts off the returning light from the mirror and the …
Photographing Foucault tests? - IceInSpace
- https://www.iceinspace.com.au/forum/showthread.php?t=24708
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Foucault test - Telescope Optics
- https://telescope-optics.net/foucault_test.htm
- 4.8.2. Foucault test. Invented by the French scientist Leon Foucault in 1858, this ingenious test uses point source of light placed at the center of curvature of a concave mirror (in practice, slightly to the side, so that the mirror focus is …
Where to Place Camera for Foucault Tester Images for Foucault …
- https://www.cloudynights.com/topic/715482-where-to-place-camera-for-foucault-tester-images-for-foucault-unmasked/
- The cam should be focused on the mirror itself (or aperture stop of whatever system is being tested, or quadratic mean of multiply-imaged stop in AC test) with cam lens opened wide, best done prior to turning the lights out and Foucault (or interferometer) source on. A piece of graph paper at the mirror is superb for setting that properly.
DIY Telescope: Building a Foucault Tester - YouTube
- https://www.youtube.com/watch?v=DAE70xYpUkk
- I’ve been polishing this mirror for a few weeks now and now that it’s completely polished out it’s time to start checking its shape. And to do this, I need t...
Foucault Test Image Analyzer
- http://foucault.sourceforge.net/
- Welcome to the homepage of Foucault Test Image Analyzer. If you are an amateur telescope maker, this software can take the tedium out of measuring the shape of your mirror. Traditionally, amateur mirror makers use a Couder screen, nimble fingers and keen eyesight to quantify the results of the Foucault test by finding the exact knife locations ...
Understanding Foucault - The ATMs Workshop
- https://www.atm-workshop.com/foucault.html
- This reproduction of "Understanding Foucault" is only one portion of the excellent writings David has penned dealing with Foucault Testing and mirror making. More of his clear, down to earth, information and work methods is available in the book …
Homemade Foucault Tester
- https://mtham.ucolick.org/techdocs/techref/OpsManuals/Images/Work%20Pictures/Aluminizing%20Tank/Homemade%20Foucault%20Tester.pdf
- Ronchi test is easiest for beginners, so this will assume you have a ronchi screen in the tester. At the exact Radius of Curvature of the mirror (ROC), which is exactly twice the focal length, the Ronchi test actually becomes the Foucault test. Much figuring can be done using the Ronchi lines and then Foucalt measuring,
Foucault knife-edge test - Wikipedia
- https://en.wikipedia.org/wiki/Foucault_knife-edge_test
- The Foucault knife-edge test is an optical test developed 150 years ago to accurately measure the shape of concave curved mirrors. It is commonly used by amateur telescope makers for figuring primary mirrors in reflecting telescopes. It uses a relatively simple, inexpensive apparatus compared to other testing techniques. ... a photograph ...
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