Abstract
A laboratory experiment was performed on the achromatic nulling in the visible to SIM requirements. The experiment employed phase shifting interferometry techniques on a spectrally-dispersed fringe to measure the phase as a function of wavelength. The phase was then used by a control system which adjusts the tilt of the plates and the air path difference until a satisfactory level of the null was achieved. A fast servo adjusted the air path difference to stabilize the phase to the nanometer level. The design issue and the experimental measure of phase versus wavelength are discussed. A description of the control system and a preliminary measure of the null are presented.
Original language | English (US) |
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Pages (from-to) | 340-348 |
Number of pages | 9 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 4006 (I) |
DOIs | |
State | Published - 2000 |
Externally published | Yes |
Event | Interferometry in Optical Astronomy - Munich, Ger Duration: Mar 27 2000 → Mar 29 2000 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering