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Emulsion thickness and space variance: combined effects in Vander Lugt optical correlators
Applied Optics
|February 16, 2010
Summary
Object correlation peak intensity in Vander Lugt optical correlators varies due to emulsion thickness and processor space variance. This study isolates and demonstrates both effects independently, clarifying previous findings.
Area of Science:
- Optical Engineering
- Signal Processing
- Holography
Background:
- Vander Lugt optical correlators are sensitive to object position.
- Previous research attributed intensity variations solely to emulsion thickness effects.
Purpose of the Study:
- To investigate the causes of intensity variations in correlation peaks.
- To differentiate between emulsion thickness effects and space variance effects in optical processors.
Main Methods:
- Experimental analysis of Vander Lugt optical correlators.
- Isolation of emulsion thickness effects.
- Isolation of position-dependent frequency cutoff effects due to space variance.
Main Results:
- Intensity variations are caused by a combination of emulsion thickness and space variance.
- Each effect was demonstrated to influence correlation peak intensity independently.
- The position-dependent frequency cutoff is a significant factor in intensity variations.
Conclusions:
- Emulsion thickness is not the sole cause of intensity variations in optical correlator peaks.
- Space variance in optical processors contributes significantly to position-dependent intensity changes.
- Understanding these combined effects is crucial for accurate optical correlation.
