Related Experiment Video
Updated: Jun 17, 2026
10:28
Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
Published on: July 5, 2016
Noise in off-axis type holograms including reconstruction and CCD camera parameters
1FEI Company, 5350 NE Dawson Creek Drive, Hillsboro, OR 97124-5793, USA. edgar.voelkl@fei.com
Ultramicroscopy
|December 22, 2009
Summary
This study derives a new expression for noise in digital hologram reconstruction, accounting for reconstruction parameters and CCD camera digitization effects. Optimizing CCD cameras for low sampling rates can significantly reduce phase and amplitude noise.
Area of Science:
- Optics
- Quantum Mechanics
- Image Processing
Background:
- Digital holography commonly extracts phase and amplitude images through reconstruction.
- Previous noise models did not fully account for the reconstruction process itself.
Purpose of the Study:
- To derive a consistent expression for noise in reconstructed phase and amplitude images.
- To evaluate the impact of reconstruction parameters and CCD digitization on noise levels.
Main Methods:
- Started with Quantum Mechanical intensity distribution of off-axis interference patterns.
- Built digital holograms electron-by-electron, reconstructing images and evaluating noise.
- Included digitization effects of an ideal CCD camera.
Main Results:
- Derived a noise expression incorporating reconstruction parameters.
- Found that CCD camera digitization significantly affects noise.
- Compared performance of ideal versus real CCD cameras.
Conclusions:
- Significant improvement in phase and amplitude noise is possible.
- Optimizing CCD cameras for low sampling rates is key for reducing noise.
