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Konstrukční úpravy dataprojektoru pro optická 3D měření
Pochmon, Michal ; Pravdová, L. ; Rössler, T.
Optical profilometric and topographic non-coherence measurements have a great use today, for example in deformation measurement, product quality control, total arthroplasty wear measurement and many others. These measurements are based on using optical structure, which is projected on the measured object and is deformed by its surface. Good projector of such optical structure is data-projector. Its imperfection is too large zoom of serial objective, so measurement of small objects is influenced by quite big measurement error. This is caused by projecting only small part of optical structure is projected on measured object and that negative influences resolution of measurement method. For the measurement of small objects is necessary replace the serial objective by objective, whom parameters allow the measurement of this object influenced by the measurement error as small as possible.
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Nová měřící metoda tvaru konkávních zrcadel na principu digitálního zpracování Hartmanova testu
Pech, Miroslav ; Mandát, Dušan ; Hrabovský, Miroslav ; Schovánek, Petr
The theory, optical, mechanical, and software design for a special Hartmann wavefront analyzer is presented. This method is applied for the non-contact method of concave mirrors shape measurements. The so-called Hartmann test is used with the digital image reading and the fast computer data evaluation. In this method a transparent spatial modulator is used instead of binary mask. Our institute Joint Laboratory of Optics produces segmented mirrors for the Pierre Auger observatory fluorescent detector [1]. We use this method as the qualitative measuring of this spherical mirror segments. These segments are unique because they are light and ultrathin. The production of mirrors is based on standard operations commonly used in the optical industry (cutting, drilling, milling, grinding and polishing), with the difference that they are extremely thin. This fact can cause segment shape instability in the production process.
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