Journal ArticleDOI
Modified Zone-plate Interferometer for Testing Aspheric Surfaces
Reads0
Chats0
TLDR
In this paper, a modified zone-plate is made by combining two kinds of zone-plates; the semicricular part of the plate produces the spherical wave, and the remainder the desired aspheric wave.Abstract:
A new type of common path interferometer using a modified zone-plate developed for testing aspheric surfaces is described The modified zone-plate is made by combining two kinds of zone-plates; the semicricular part of the plate produces the spherical wave, and the remainder the desired aspheric wave These are synthesized by digital computation A method of computation for synthesizing the modified zone-plate and some experimental results of the test of parabolic mirrors are givenread more
Citations
More filters
Proceedings ArticleDOI
Applications of computer-generated holograms for interferometric measurement of large aspheric optics
TL;DR: In this article, a new test to certify null correctors was designed and implemented that uses small CGH's fabricated onto flat surfaces, which solved the difficult problem of verifying the accuracy of the null corrector that are used for measuring primary mirrors.
Journal ArticleDOI
Differential interference contrast x-ray microscopy with twin zone plates
Burkhard Kaulich,Thomas Wilhein,Enzo Di Fabrizio,Filippo Romanato,Matteo Altissimo,Stefano Cabrini,Barbara Fayard,Jean Susini +7 more
TL;DR: In this paper, a twin zone plate (TZP) setup was used to generate focal points closely spaced within the TZP spatial resolution of 160 nm for X-ray imaging in differential interference contrast (DIC).
Proceedings ArticleDOI
Processing parameter optimization for thermochemical writing of DOEs on chromium films
Vadim V. Cherkashin,Evgeny G. Churin,Victor P. Korolkov,Voldemar Petrovich Koronkevich,Andrey A. Kharissov,Alexander G. Poleshchuk,James H. Burge +6 more
TL;DR: In this paper, a focused laser beam was used to write patterns by inducing a thermochemical change in a bare metal film, and the patterns were developed using a single etching step that dissolves the non-exposed metal.
Journal ArticleDOI
Differential interference contrast X-ray microscopy with twin zone plates at ESRF beamline ID21
Thomas Wilhein,Burkhard Kaulich,E. Di Fabrizio,Filippo Romanato,Matteo Altissimo,J. Susini,Barbara Fayard,U. Neuhäusler,S. Cabrini,François Polack +9 more
TL;DR: A drastic increase in image contrast for a low-absorbing specimen is demonstrated for both the full-field imaging and scanning x-ray microscope methods, similar to the Nomarski DIC method for visible-light microscopy.
Journal Article
Using computer generated holograms to test aspheric wavefronts
James C. Wyant,V. P. Bennett +1 more
TL;DR: In this article, the use of computer generated holograms for the testing of aspheric wavefronts is described, and an analysis of the errors produced by emulsion movement, incorrect hologram size and position, and distortion in hologram plotter and photoreduction lens is given, and it is shown that all the errors are proportional to the slope of the wavefront.
References
More filters
Journal ArticleDOI
Using Computer Generated Holograms to Test Aspheric Wavefronts
James C. Wyant,V. P. Bennett +1 more
TL;DR: An analysis of the errors produced by emulsion movement, incorrect hologram size and position, and distortion in hologram plotter and photoreduction lens is given, and it is shown that all the errors are proportional to the slope of the aspheric wavefront.
Journal ArticleDOI
Computer Generated Holograms for Testing Optical Elements
Alan J. MacGovern,J. C. Wyant +1 more
TL;DR: The application of computer generated holograms to the interferometric testing of aspheric optical elements has been investigated, and it has been shown that they provide a convenient and practical method of producing an asPheric reference wavefront.
Journal ArticleDOI
Zone plate interferometer.
TL;DR: A developed form of the Fresnel zone-plate interferometer is described, associated with the real and virtual first order foci of a zone plate, and its properties are discussed.
Journal ArticleDOI
Common Path Interferometer Using Fresnel Zone Plates
TL;DR: In this paper, a new kind of interferometer for testing any unit magnification optical system is described, which utilizes diffraction beam splitting and involves the use of two identical Fresnel zone plates, one by the side of the other.
Journal ArticleDOI
The application of computer-generated holograms to testing optical elements
K G Birch,Frances J Green +1 more
TL;DR: The application of computer-generated holograms to the interferometric testing of aspheric reflecting elements and spherical refracting elements has been investigated in this paper, where a new technique for calculating the hologram and drawing it with a computer-controlled plotter has been demonstrated to provide holograms that reconstruct the required wavefront with an RMS error of better than?/20.