WebbLOFT, Large Optics Fabrication and Testing group with OEFF & RFCML ... Webb6 okt. 2000 · Three interferometric methods for testing the large concave spherical mirrors with long radius of curvature, the large convex spherical and flat surfaces and the large aspherical mirrors are described respectively. A number of testing results obtained with each form of interferometer are presented. Open Advanced Search.

Hindle sphere Photonics Dictionary® Photonics Marketplace

Webb19 juli 2010 · In typical test embodiments, the simplicity of the Test enables rapid implementation at a fraction of the cost of comparable Hindle-Sphere or Hindle-Simpson tests. An interferometric null Test Method is described for testing convex aspheric surfaces, such as found in secondary mirrors of Cassegrain telescopes or variations … WebbDownload scientific diagram shows an image of hindle sphere test. from publication: Wide field corrector for the KMTNet telescope We present the design, assembly, … purchase automatic knives in nh

Interferometric test method for testing convex aspheric

Webb13 sep. 2010 · Relative to the sphere, a Schmidt curve 11 fringes deep at 0.707r. If the spherical test plate is off by a couple of fringes it might be hard to visually read the 2ndry figure with the neutral zone (.707r) moving in or out. Is there software that would do it. What would the requirements be for a Hindle sphere to test an 8'' say f/4.75 hyperboloid? WebbTests for optical surface accuracy: double pass test, interferometry. Among many different types of tests for optical surface quality, a few that gained popularity among amateurs are the Foucault test, Ronchi test, Waineo null test, Hindle sphere test, Dall and Ross null test, Offner null test, double pass test and, more recently ... http://lzos.com/en/articles_interference_astro_mirror.htm purchase avast antivirus benefits