OPTICAL CELL CONTROL SYSTEM

摘要

A control system for an optical cell (light valve) is provided which compris es a first (oscillator) circuit supplied by a low voltag e power source and including a primary winding of an induction coil and a seco ndary (resonant) circuit which includes the optical cell and a secondary winding of the induction coil. The secondary circuit includes the inductance of the secondary winding and the optical cell , and the induction coil provides a weak coupling between the primary and secondary wi ndings. The resonant circuit provides a large over-volta ge coefficient and great stability and the configuration made possible by the i nvention facilitates a significant reduction in the bulk of the control system.