Patents by Inventor Kezhou Ding

Kezhou Ding has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • X-ray image intensifier with high x-ray conversion efficiency and resolution ratios
    Patent number: 5623141
    Abstract: A new type x-ray image intensifier has a specially developed x-ray sensit 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.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: April 22, 1997
    Assignee: Xian Institute of Optics & Precision Mechanics, Academia Sinica
    Inventors: Xun Hou, Xiuqin Liu, Kezhou Ding