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Abstract
The thermal image signals can be directly converted into optical signals in the visible region by a pyroelectric (PE) converter. We examine the potential use of a pyrooptic converter for signal processing which utilizes a PE, KDP doped TGS crystal and an electrooptic (EO), 854E liquid crystal. When TGSK is exposed to a pulsed infrared radiation produced from a near-infrared light-emitting diode at the wavelength of 0.95 μm, an alternating voltage is generated by the PE effect, and it subsequently induces the electrooptic effect in the LC layer. In the frequency region of 10 to 100 Hz, the EO modulation of the LC becomes saturated at about 0.4 V, and the response time is fairly constant.