| 摘要 |
<p>PURPOSE:To write informations by incoherent visible rays and read them by coherent infrared rays, to increase the kinds of light sources and to improve sensitivity and resolution by holding a photoconductive body with a semiconductor made of a zinc blende type crystal by a pair of electrodes through an insulator. CONSTITUTION:An insulating film 32 in 7mum is formed on Cd0.3Zn0.7Te 31 as a photoconductive body in 500mum thickness prepared through a high-pressure melting method, and transparent electrodes (In2O3.Sn) 33 are formed on both surfaces through a reactive sputtering method. Voltage of 2kV is applied between the transparent electrodes 33, 33, and informations are written by incoherent beams (c) from a tungsten lamp. Coherent beams (d) from a laser in a 1.06mum wavelength are used, and projected to a picture conversion element through a polarizer 36. Only components modulated by the conversion element are changed into coherent beams (e) converted through the polarizer 36 and an analyzer 37 positioned at the position of a cross Nicol. Cd0.3Zn0.7Te has sensitivity extending over the whole visible regions, and visible rays can be used for writing.</p> |
