The electron beam tunable interference filter spatial light modulator (ETIF-SLM), which combines the established technologies of the cathode ray tube with nonlinear interference filters (NLIF), could find applications in cross-bar and other array switching configurations. In this work the NLIF is a ZnSe/ThF4 multilayer thin film structure based on the BEAT device geometry, i.e., with an external absorbing layer. The high thermo-optic coefficient of the ZnSe spacer (dn/dT = 2×10-4K-1) allows the passband of the interference filter to be shifted by the temperature changes induced by the power absorbed from either the optical input or the e-beam. The general concept of this device has been demonstrated previously using a low voltage vidicon tube with large e-beam spot size (500 µm diameter). The author describe the use of a miniature CRT with 25-60 µm spot size, to make an ETIF-SLM with a factor of > 100 faster response and 10 times better spatial resolution.
|Number of pages||3|
|Journal||Proceedings of SPIE - the International Society for Optical Engineering|
|Publication status||Published - 1990|
|Event||1990 International Topical Meeting on Optical Computing - Kobe, Jpn|
Duration: 8 Apr 1990 → 12 Apr 1990