Dynamic null lens for aspheric testing using a membrane mirror
| Autor: | Christof Pruss, Hans J. Tiziani |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Surface (mathematics)
Null (radio) Computer science Optical testing business.industry Membrane mirror Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Lens (optics) Interferometry Optics law Spherical wave Calibration algorithm Electrical and Electronic Engineering Physical and Theoretical Chemistry business |
| Zdroj: | Optics Communications. 233:15-19 |
| ISSN: | 0030-4018 |
| Popis: | 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. In this paper we present a new approach for testing aspheric surfaces that avoids static, individually manufactured null lenses: an active null lens that is based on a computer controlled membrane mirror. It can be adapted to different aspheric shapes, thus providing much more flexibility in optical shop testing. In this paper we are giving some details on the characteristics of the 25 mm membrane mirror developed at TU Delft and introduce the setup of the active null lens test system. Measurements and the calibration algorithm of the setup are presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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