Engineering topics
Publications and source records attributed to Cheng, Yeou-Yen.
Coordinate transformation maps object space to correlation space. Theory developed to predict and correct typical anamorphic coordinate-transformation errors in off-axis Vander Lugt optical correlators.
A new method to generate a circular harmonic filter with both rotation and translation invariance is described, which is based on a phase-shifted double-exposure (PSDE) technique. An expression for the peak correlation intensity at the origin for the correlation plane as a function of target orientation for the PSDE filter is derived. Experimental results confirming the theoretical predictions are provided.