Television-optical operational amplifier
- 15 August 1979
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 18 (16) , 2754-2759
- https://doi.org/10.1364/ao.18.002754
Abstract
The advantages of negative feedback are well known in electronics and extensively used in the operational amplifier. The properties of such a system are nearly independent of the parameters in the forward branch of the system; they are only determined by external elements in the backward branch. An optical analog of such an operational amplifier is reported. The essential operations, amplifications, and inversion of the circulating signals are carried out using a TV system. The capability of the system to compensate for spatial inhomogeneities and for nonlinearities is demonstrated. In addition, the system is able to create the inverse of a transfer function located in the feedback branch.Keywords
This publication has 7 references indexed in Scilit:
- Generation of Space and Time Picture Oscillations by Active Incoherent FeedbackOptica Acta: International Journal of Optics, 1978
- Image processing system using incoherent image feedbackApplied Optics, 1978
- Design considerations for an active feedback optical systemOptical and Quantum Electronics, 1978
- Suggestions for hybrid image processingOptics Communications, 1977
- Hybrid image processing with feedbackOptics Communications, 1977
- Mathematical Operations By Optical ProcessingOptical Engineering, 1974
- Active Synthesis of Inverse Spatial FiltersApplied Optics, 1971