Shadowgraph imaging using scatter and fluorescence

• US 4,839,913 A
• Filed: 04/20/1987
• Issued: 06/13/1989
• Est. Priority Date: 04/20/1987
• Status: Expired due to Fees

• Current Assignee: American Science and Engineering Incorporated (OSI Systems Incorporated)
• Original Assignee: American Science and Engineering Incorporated (OSI Systems Incorporated)
• Inventors: Bjorkholm, Paul, Annis, Martin
• Primary Examiner(s): Church, Craig E.
• Application Number:
  US07/040,018
• Time in Patent Office: 785 Days
• Field of Search: 378/44, 378/45, 378/46, 378/57, 378/98, 378/99, 378/6, 378/87, 378/146
• US Class Current: 378/44
• CPC Class Codes: G01N 2223/076 X-ray fluorescence
• CPC Class Codes: G01N 23/223 by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
• CPC Class Codes: G01V 5/222 measuring scattered radiation
• CPC Class Codes: G01V 5/234 Measuring induced radiation, e.g. thermal neutron activation analysis

Abstract

Information is derived from a selected fluorescent radiation line produced when an object is illuminated by a flying spot scanner. The illuminating radiation has an energy level sufficient to produce the fluorescent line when targeted components of the object are present and illuminated. A detector senses a fluorescent radiation line emitted from the targeted components to generate electrical fluorence based signals.

Claims