专利详情

专利名称	X-ray image intensifier with high x-ray conversion efficiency and resolution ratios
申请号	US32250294A	专利类型	US
公开（公告）号	US5623141A	公开（授权）日	1997.04.22
申请（专利权）人	中国科学院西安光学精密机械研究所	发明（设计）人	HOU XUN ; LIU XIUQIN ; DING KEZHOU
主分类号	H01J40/14	IPC主分类号	H01J40/14
专利有效期	X-ray image intensifier with high x-ray conversion efficiency and resolution ratios 至X-ray image intensifier with high x-ray conversion efficiency and resolution ratios	法律状态
说明书摘要	A new type x-ray image intensifier has a specially developed x-ray sensitive photocathode which has a low/high density alkali halogenide structure and therefore has high conversion efficiency of converting x-ray directly into photoelectrons or a field-assisted x-ray photocathode which has an extracting field and therefore is able to provide a high conversion efficiency of x-ray to photoelectron and high spatial resolution, even high time resolution. The new type x-ray image intensifier consists of the x-ray photocathode, a MCP and a phosphor screen, forming a proximity focus type photoelectric imaging device. A new portable x-ray diagnosis unit has the new type x-ray image intensifier and a new type compact x-ray source that has a very small volume, 30-90 kv acceleration voltage and a cone protective cover at the outlet of x-ray.