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Sub-aperture piston phase diversity for segmented and multi-aperture systems
Matthew R Bolcar1, James R Fienup
1The Institute of Optics, The University of Rochester, Rochester, New York 14627, USA. mrbolcar@gmail.com
Applied Optics
|December 25, 2008
Summary
This study introduces a novel phase diversity technique for segmented and multi-aperture imaging systems. The new method uses piston shifts between sub-apertures, offering an alternative to conventional focus diversity for aberration estimation.
Area of Science:
- Optics and Photonics
- Image Science
- Astronomical Instrumentation
Background:
- Phase diversity is a crucial image-based wavefront sensing technique.
- It simultaneously estimates phase aberrations and object images.
- Conventional methods typically use focus diversity (defocus).
Purpose of the Study:
- To present a novel phase diversity method for segmented and multi-aperture systems.
- To introduce piston diversity as a new aberration-inducing technique.
- To compare the efficacy of piston diversity against conventional focus diversity.
Main Methods:
- Image-based wavefront sensing.
- Introduction of piston shifts between sub-apertures in segmented/multi-aperture systems.
- Comparative analysis with traditional focus diversity.
Main Results:
- A new phase diversity method utilizing sub-aperture piston is demonstrated.
- This method is specifically tailored for segmented and multi-aperture optical systems.
- Performance comparison with focus diversity is established.
Conclusions:
- Piston diversity offers a unique approach for wavefront sensing in segmented systems.
- The proposed method provides an alternative to conventional focus diversity.
- This advancement aids in accurate aberration estimation for complex imaging systems.
