Research on realization of optical zoom system with low-voltage-driving liquid crystal lens

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Optical system with approximately zoom ratio of 3 is designed and tested experimentally. Extremely thin glass substrates are used to fabricate an LC lens of 3 LC layers. The response property is greatly improved. Using a high resistive layer in a LC lens, it becomes possible decrease the thickness of the insulator between the patterned electrode and the LC layer to approximately 1μm. Consequently, an LC lens with approximately thickness as small 200μm and voltages as low as 3V is realized. Optical imaging system with an LC lens as a focusing element is setup. The method of analysis of the resolution and MTF, etc, is confirmed.