Abstract
Scanning optical systems are widely used in a variety of imaging schemes (such as in remote sensing, microscopy, etc.). On-line processing and incoherent imaging are some of the advantages of a scanning imaging system. However, the operations achievable using such a system are restricted due to its corresponding real and positive point spread functions (PSFs). Two-pupil synthesis1 of PSFs removes this restriction as the PSF synthesized is bipolar in general. The capabilities of a scanning optical system can be enhanced if the input is processed by several different operations in parallel.2 The purpose of this talk is to demonstrate that multiple parallel processing can be achieved by scanning the input with a PSF resulting from the interaction of more than two pupils. Multiple-pupil interaction is achieved in a system employing a detuned Fabry–Perot driven by a piezoelectric transducer. The spatially separated pupils are shifted in frequency by Doppler effect and interact with each other on the input. Since each pupil is offset by a different temporal frequency, the output contains terms oscillating at the sum and difference frequencies, each of which can perform a different bipolar filtering operation and can be sorted electronically. A four-band spatial filtering operation is demonstrated.
© 1990 Optical Society of America
PDF ArticleMore Like This
D. W. MYERS, D. E. DECKER, M. A. JOHNSON, and S. D. MOSTEK
CTUH71 Conference on Lasers and Electro-Optics (CLEO:S&I) 1990
Ting-Chung Poon and Guy Indebetouw
THQ4 OSA Annual Meeting (FIO) 1985
J. Oberle, A. Daunois, and A. C. Walker
TDSLS78 Nonlinear Dynamics in Optical Systems (NLDOS) 1990