Zobrazeno 1 - 10
of 285
pro vyhledávání: '"Hans J. Tiziani"'
Autor:
Stephan Reichelt, Hans J. Tiziani
Publikováno v:
tm - Technisches Messen. 73:554-565
Flächenhafte interferometrische Prüfverfahren sind zur Qualitätsbeurteilung optischer Bauteile prädestiniert. Die Prüfung von asphärischen optischen Flächen oder Systemen erfordert jedoch fast immer spezielle Nullkompensatoren. Für diese Aufg
Publikováno v:
Optics Communications. 245:255-269
In a Shack–Hartmann sensor the wavefront to be measured is sampled by a microlens array. The beams are directed to a spot in the focal plane. The displacement of the spots is a measure for the local gradient of the wavefront over one microlens. In
Publikováno v:
Optics Communications. 233:161-166
The performance of an optical system depends on its aberrations. One way to reduce aberrations is a careful a priori optimization of the lens design. For a given system the introduction of a compensation hologram can lead to a perfect system. For thi
Autor:
Christof Pruss, Hans J. Tiziani
Publikováno v:
Optics Communications. 233:15-19
Flexible aspheric surface testing is still a major topic in optical industry. Interferometric null testing of aspheric surfaces requires a compensator element that adapts the spherical wave of the interferometer to the individual surface under test.
Autor:
Yoshiaki Yasuno, Tobias Wiesendanger, Toyohiko Yatagai, Shuichi Makita, Aiko Ruprecht, Hans J. Tiziani
Publikováno v:
Optics Communications. 232:91-97
A simple wavefront evaluation method is proposed which employs only one Fourier transform lens, one CCD camera and a digital signal processing procedure. The optical setup is sufficiently simple to be used in numerous types of optical systems. The fe
Publikováno v:
Optics and Lasers in Engineering. 40:487-499
A system based on digital holographic interferometry in combination with a flexible fiber endoscope is described. A Q-switched pulsed laser is used. Two digital holograms of the test object, corresponding to the two laser pulses, are captured at sepa
Autor:
Stephan Reichelt, Hans J. Tiziani
Publikováno v:
Optics Communications. 220:23-32
A novel technique for absolute calibration the wavefront reconstructed by computer generated holograms (CGHs) is presented. It requires a specially designed multiplexed CGH (Twin-CGH), which reconstructs two wavefronts with the same symmetry. One of
Publikováno v:
Optik. 113:513-519
Summary A modified Linnik and a Mirau interferometer are introduced which can be used for Ellipso-Height-Topometry. With these, a set of topographies can be measured, where the measured height H(x, y), the ellipsometric angles Φ(x, y), Δ(x, y) and
Autor:
M. Rocktäschel, Hans J. Tiziani
Publikováno v:
Optics & Laser Technology. 34:631-637
Aspheric lenses and surfaces are increasingly used in modern high-quality optics. Therefore, new measuring methods for an accurate quantification of these aspheres are also necessary. The current approach to quantify aspheres is to apply null systems
Publikováno v:
Optics and Lasers in Engineering. 38:117-129
An optoelectronic system is presented that is used to measure the 3D vector components of a vibrating object. The complete determination of the vibration occurs by combination of three different measurements. 1. A 3D system based on digital holograph