Light modulation matrix for image reproduction - with magnetooptical matrix which produces switching control of cells based upon Faraday effect

摘要

The modulation matrix is for an image display or projection system and uses a structured magneto-optical layer e.g. iron-garmet to provide electrical rather than optical switching. For a direct transmission system light is transmitted over a polariser (P) through the modulation matrix (M) with associated switching cells (2) over a coupling plate (K) onto the analyser (A). The modulation matrix consists of an iron-garnet layer on a substrate with resistive layer sandwiched between two electrodes mounted on top. For the transmitting version the electrodes and the resistive layer are transparent. Up to 250,000 magneto-optical cells may be produced that are selectively switched by current pulses to produce heat generation.