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研制出一种夹层结构的固体X光薄屏,由光导层和半导体场致发光粉末层所组成。光导层和场致发光层相互串联并同时加上交流及直流电压。转换器对X光的敏感度取决于通过光导层的电压降和输入的X光强。转换器的灰度系数和输入范围通过调节加在屏上的直流电压广泛地予以控制。场致发光磷光体用交流激发。在低X光强下光输出强度得到很大改进,而并不响影图象分辨率。当X光强为30毫仑/分,峰值电压为80千伏时,转换器所产生的光输出约为普通荧光屏的800倍,能够观察到直径为200微米的钼线。不过图象建立和消除的时间需要几秒钟。另外,还示出了用试制的转换器转换的X光图象。
Developed a sandwich structure of solid X-ray thin screen, the light-guide layer and the semiconductor electroluminescent powder layer. The photoconductive layer and the electroluminescent layer are connected in series with each other and apply both AC and DC voltage. The sensitivity of the converter to X-rays depends on the voltage drop across the photoconductive layer and the input X-ray intensity. The converter's gamma and input range are widely controlled by adjusting the DC voltage applied to the screen. Electroluminescent electroluminescence excited by the exchange. The intensity of the light output is greatly improved at low X-ray intensities without the shadow image resolution. When the X-ray intensity is 30 milliliters per minute and the peak voltage is 80 kilovolts, the converter produces 800 times the light output of a normal fluorescent screen, allowing the observation of molybdenum wire with a diameter of 200 microns. However, it takes a few seconds for the image to be created and removed. In addition, the X-ray images converted with the prototype converter are also shown.