Passive electro optical materials and applications
Abstract
Electro-optical ceramics made of lead/lanthanum/zirconates/titanates (PLZT) can be economically manufactured by coprecipitation of the base materials and by vacuum sintering of the sintering of the green blocks. Magnesium additives reduce by half the operating voltage required to achieve an equal contrast ratio. Transparent electrodes deposited by sputtering tin-indium oxide remain transparent up to 2400 nm. The contrast ratio in the scattering mode amounts typically to 100 : 1 at 500 nm and 5 : 1 at 1000 nm, while in the birefrigence mode it amounts typically to 10,000 : 1 at 800 V/mm, at a thickness of 0.4 mm. Functional blocks were designed to demonstrate and test applications: a laser modular; a light intensity attenuator; welding protection goggles; and numerical displays. The first promising results with sputtered thin films indicate future suitability for displays. Multiple light modulators for opto-electronic nonimpact printing presently appear to be the most important application area.
- Publication:
-
Final Report Standard Elektrik Lorenz A.G
- Pub Date:
- December 1980
- Bibcode:
- 1980selg.rept.....D
- Keywords:
-
- Ceramics;
- Electro-Optical Effect;
- Lead Zirconate Titanates;
- Manufacturing;
- Optical Materials;
- Optical Properties;
- Birefringence;
- Electrodes;
- Lasers;
- Light Modulation;
- Sintering;
- Sputtering;
- Optics