Study on novel light absorption layer of LCLV

Lei Zhang; Quan Jiang; Gang Yang; Jianbo Chen

doi:10.1117/12.674356

9 June 2006 Study on novel light absorption layer of LCLV

Lei Zhang, Quan Jiang, Gang Yang, Jianbo Chen

Proceedings Volume 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 61493K (2006) https://doi.org/10.1117/12.674356
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

Abstract

A novel light absorption layer for liquid crystal light valve is developed by VOPc and a new structure of liquid crystal light valve by using a three-sources evaporation system is proposed. CdTe is a typical absorption layer for liquid crystal light valve, but its absorption coefficient is not so good, especially at 400nm-500nm. However, the absorption of VOPc is very good at this range. So VOPc is introduced to the multi absorption layer. Then a double-layer absorption layer with a good absorption at whole visible light range can be got. To increase the adherence to the substrate, an SiO layer is introduced to wrap the CdTe layer and VOPc layer like a sandwich structure. At first SiO layer is evaporated and then the CdTe layer and the VOPc layer at the same time. After finishing the CdTe layer, VOPc is continuously evaporated for a while and then evaporating the CdTe is again made. After finishing CdTe and VOPc layer, SiO layer is used to cover the whole layer. At last, a multi light absorption layer with 8000Å thick and the structure of SiO:CdTe:VOPc:CdTe:SiO is deposited on glass by evaporation technique. Dependence of light absorption coefficient of multi film is measured. The resistivity of novel absorption layer is 5.5 10⁸Ω•cm. The absorption coefficient of _R=7.8 10⁵ cm¹, _G=6.8 10⁵ cm¹, and _B=7.2 10⁵ cm¹ is obtained with the optimum technics through experiment, and it can meet the needs of the liquid crystal light valve.

Citation Download Citation

Lei Zhang, Quan Jiang, Gang Yang, and Jianbo Chen "Study on novel light absorption layer of LCLV", Proc. SPIE 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 61493K (9 June 2006); https://doi.org/10.1117/12.674356

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